CA1159252A - Shoe with a molded outsole and a process for making the same - Google Patents
Shoe with a molded outsole and a process for making the sameInfo
- Publication number
- CA1159252A CA1159252A CA000390993A CA390993A CA1159252A CA 1159252 A CA1159252 A CA 1159252A CA 000390993 A CA000390993 A CA 000390993A CA 390993 A CA390993 A CA 390993A CA 1159252 A CA1159252 A CA 1159252A
- Authority
- CA
- Canada
- Prior art keywords
- insole
- outsole
- footwear
- piece
- shoe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/12—Special watertight footwear
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B9/00—Footwear characterised by the assembling of the individual parts
- A43B9/10—Footwear with out-turned uppers
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
TITLE OF THE INVENTION
"SHOE WITH A MOLDED OUTSOLE AND A PROCESS
FOR MAKING THE SAME"
ABSTRACT
The invention is responsible for a new style of footwear with a directly molded, more specially injection molded, outsole, which makes it possible for footwear of the flexible sort (that is to say with an outwardly turned edge on the upper,and which is fixed to the outsole) to be produced simply.
For this purpose an insole,having the same size as the sole part of the last, is stitched into the upper, the outer limit of the insole being used, when lasting, for lining up the roughly shaped shoe on the last sole.
The outsole is then molded on the outwarly turned edge itself running out past the insole.
"SHOE WITH A MOLDED OUTSOLE AND A PROCESS
FOR MAKING THE SAME"
ABSTRACT
The invention is responsible for a new style of footwear with a directly molded, more specially injection molded, outsole, which makes it possible for footwear of the flexible sort (that is to say with an outwardly turned edge on the upper,and which is fixed to the outsole) to be produced simply.
For this purpose an insole,having the same size as the sole part of the last, is stitched into the upper, the outer limit of the insole being used, when lasting, for lining up the roughly shaped shoe on the last sole.
The outsole is then molded on the outwarly turned edge itself running out past the insole.
Description
`
9 ~ ~ 2 11 ;
¦Backqround of the invention The present invention is with respect to foo~wear with a Il molded, as for example injection molded, outsole and having an : I upper stitched to insole covering the top side of the outsole, : ~ and with an outwardly running lower edge trimmed back after molding of the outsole. The invention is furthermore with ~¦respect to a process for producing such a piece of footwear l¦in the case of which the upper is stitched together from I I!clicked out pieces of material, and then the insole is stitched to the upper and, lastly, after putting on a last,the upper ~of the shoe produced on these lines has the outsole molded on iit.
There are a number of different sorts of shoes with molded llon soles. In the case of sorts of shoes in which the lower edge 15 ¦1 of the upper is turned inwards, as is normally the case, there is on the one hand a shortcoming inasfar as,before molding the sole, the upper has to be skived and rough scoured because ilotherwise the sole will not be strongly adhesively joined to~the ~59252 ¦¦ upper. Such working steps undertaken by hand are responsible ¦ in every case for irregular processing. Furthexmore, on puttin~ ¦
on the adhesive or cement, there is the danger, if the worker l does not take great care, of getting some of it on parts of ! the upper which are later not covered by the molded sole and ¦ any such undesired adhesive will have to be taken off later 11 (if at all possible) in a further working step. Further trouble on producing such footwear is likely in connection with lasting:
I If the shoe top part is not completely truly and regularly lasted, the outcome will be a lower quality.
In the prior art flexible footwear (that is to say footwear whose outwardly turned edges of the uppers are joined to the outsole) has been produced with molded outsoles (see German !¦ OffenlecJun~sschrift specification 2,830,605), in ~he case of I which a generally stiff midsole with the function of an insole is joined to the upper at its outwardly ~urned edge and then the ou~sole is molded on the midso:le. There are a number of ¦~ troubles wi-th such a process: On the one hand, because the mid-~I sole is generally stiff, it is hard to get the shoe regularly ¦ lasted for molding, while on the other hand after molding the j midsole has t~ be trimmed back together with the edge of the ¦ upper. Because the material to be trimmed here is generally ¦ thick, heavy machines have to be used for tri~min~. Furthermore, Il scouring is frequently necessary~ On using heavy trimming 25 1¦ machines, there is the further danger of damage to specially produced embossed patterns and a loss of ~uality in this respect as well. Lastly, in prior art footwear with a midsole, there is a shortcoming inasmuch as the molded on outsole is I only adhesively joined to the midsole, that is to say the 30 ¦1 outsole is only fixed to the upper by way of the stitching between the upper and the midsole. Such stitches are, however, of limited strength.
Il , I
1~ 1 1592~2 ¦ General outline of the invention One purpose of the present invention is that of designing I a style of shoe with a molded outsole which is free of the ¦ shortcomings noted in connection with the prior art and which ¦ more specially may be regularly lasted, is responsible for a strong adhesive joln of the outsole on the upper and makes possible simple finishing operationson the shoe once the ¦ outsole has been molded.
l For effecting this purpose and further purposes in the 10 ~ invention, a shoe of the sort noted at the start i5 SO designed that the insole has a size answering to the edge of the last where the upper part of the last and the sole part of the last come togetherl and the outer limit of the insole is fixed to the point at which the upper and the outwardly directed edge on the same come together,and furthermore the outsole is molded ¦directly onto a lower face of the lower edge of the upper, such Imolding being undertaken for example by injection molding or ¦by casting, ; ~ It will be seen from this that, unlike known shoes of the 20 I flexible footwear style,in the shoe of the present invention ¦
the insole only goes as far as the line at which the upper ¦and the outwardly running edge thereon come together. This is ¦responsible for the very useful effect that the molded shoe l sole is directly joined with the leather of the upper itself ¦ and furthermore, generally, molding is on the flesh side of t the leather, where no roughing or scouring of the leather will be necessaryO Nevertheless, more specially on using an adhesion ¦¦promoter, the sole will be very strongly joined adhesively to ~the outwardly turned edge or flange of the upper. After casting )¦or molding the sole on the shoe of the present invention it is then only necessary for the leather of the upper to be trimmed back to si~e, a simple ~ork1ny tep only needing light tools.
` 1' 11S92~2 ¦ Furthermore, no scouring or the like is necessary so that there is no danger of damaging the sole. Furthermore, because the insole only goes as far as the line where the upper and the edge of the upper come together, there is the useful 5 ¦ effect that the size of the insole is quite the same as that ¦¦ of the last. Because of this, the shoe or other piece of ¦ footwear may be lasted very regularly for molding the outsole, because the machine worker undertaking the lasting operation has the chance of guiding himself exactly by the edge (normally ~0 present at the lower part of the last) limi~ing the sole face or area. In fact, it is only necessary for the outer limit ¦ of the insole to be lined up with this edge on the last, this ¦ being a specially simple operation if the insole is made of ¦ highly flexible material with only a low dégree of stretch, 15 ¦ because if the shoe parts are wrongly lasted, it will be ¦ simple to make out the position o the last edge through the flexible materia~. The use of the very flexible insole further-more is responsible for the useful effect that all in all a 1¦ very flexible shoe lower part is produced, something which ¦
20¦¦ has not been true so far with all flexible footwear~ this ¦¦ being more specially because of the normally great thickness ¦¦ of the midsole and furthermore because of the frequently used ¦¦ adhesive between the insole and the midsole.
¦~ It may be seen from this that this shoes of the present 251! invention are di-fferent to prior art shoes so far inasfar as Il they are much better(and more specially more exactly)processed ¦¦ while on the other hand offering a high degree of flexibility.
Furthermore, it is possible for a relatively large amount ~ of material be saved in respect of the midsole, because in fact 30¦¦ an insole is, in any case, normally used in addition and as a backup.
1~
Il I
li 1 1~2~2 I The insole may be made of a number oE different ma-terials.
Specially good wearing properties are produced if the insole ' is made of leather and is backed up under it by backing 1~ material which may not be or only partly be stretched, more ~l specially textile material and which is best fixed to the full lower face of the insole. I
l~ It is furthermore possiblel as part of the present invention, ¦
11 to have ornamental stitching at the lower edge of the upper, ¦¦ such stitching being evenly spaced from the outer limit of ~¦ ~he lower edge and only going through the upper, a special line ¦¦ of stitching running along such stitching for fixing the insole ¦
il to the upper. Such ornamental stitching may be simply produced, makes for a good-looking shoe and, at the same time, may be simply used as a marking for stitching the insole in position. Il I By a careful selection of the position of the ornamental stit- ¦
¦ ching it will be covered over under the structure by the cast~-on ¦
outsole so that there is no danger of water making its way through the stitching.
'¦ The comfort of shoes of the present invention for the wearer 20 1l may be stepped up if, in the known way, a backing, made for example of felt, other non-woven material or the likel is put ~in posltion in the molded outsole under and next to the insole.
I This backing is responsible for specially useful effects in llthe shoe or other footwear of the present invention because Inormally a highly flexible insole is used.
¦~ More specially on using such a highly flexible insole, the j molded outsole may have upwardly or downwardly curved parts ¦forming a foot seat or bed and which may be simply produced by ~1 1 ¦Imolding on the outsole. For this purpose~ it is only necessary 30 1I for the lower side of the last used on casting or molding to have inwardly or outwardly curved parts.
~!
~ 2 ¦ A piece of footwear of the present invention may be ¦ produced in a number of different ways, in which respect the upper will be stitched toge-ther fror;lclicked pieces o~ mate- ¦
rial and then stitched to the insole, whereafter, lastly, after lasting,the outsole is molded onto the shoe top part so produced. In the present invention a special way of producing such a shoe is put forward which is characterized in that before fixing the insole in position, the stitched together upper has an ornamental line of stitching or marking produced marking the inner limit of the outwardly turned edge of the upper and keeping an unchanging distance from the outer limit of the lower edge of the upper and then the insole is stitched to the upper by way of its outer edge l ~long this ornamental line of stitches or marking and then when the top part of the shoe is then put on the last, it is so lined up in relationto the lasl that the outer edge of the insole is running along an edge oll the sole side of the last.
Such an operation is responsible on the one hand for the ~ useful effect that the ornamental stitching or marking may 201¦ be produced at quite the desired positionl that is to say ¦¦ so as to bQ dependent on the position of the limit of the I¦ lower edger because the limit o~ the lower edye is produced Ii by the stamping cut quite exactly. ~long the ornamental ¦I stitching or marking, the insole may then be quite exactly 25¦l stitched into position without any trouble. The stitched-in ¦ insolel together with the limit at the lower side of the last ~ then makes possible trouble-free and completely regular lasting ¦ of the top part of the shoe for molding so that the molded ¦ outsole will be seated in generally ~uite the same position 30 ¦ on the upper or top shoe part on each and every shoe or other piece of footwear produced.
I
l .
List of fiqures and detailed account of workinq example ¦ of the invention Further detailst developments and useful effects of the invention will be seen from the account now to be given of one preferred working example of a piece of footwear - in the present case a shoe as part of the invention.
Figure 1 is a cross-section through the vamp part of a l shoe of the present invention and the ~old used I I for producing it.
1011 Figure 2 is a cross-section on the same lines as figure 1 -~
j' after the shoe has been taken from the last and trimmed to size.
The shoe of the present invention has, as will readily be seen from figure 1 t a normal upper 1 at whose lower end 151 an insole 2 is stitchedt there furthermore being a backing 3, ¦
for example of felt, other non woven material or the like, ¦ and a molded (in the present case,cast) outsole 4.
¦~ As is the case with the prior art flexible shoes, the ~¦ upper 1 has an outwardly turned lower edge 5 or flange which, 20 I in the present working example, has two ornamental Iines of stitching 6 only running through the lower edge 5. However, j the stitching may be generally coarse.
¦¦ The insole 2 is in the shoe of the present inve~tion only ¦¦ of such a size that its outer limit 7 ls at the position a 251'1 where the upper 1(in the limited sense of the word)and the lower edge 5 come together. In other words,it is at the transition between upper and upper edge. The insole is stitched ¦ along its outer limit 7 by stitching 9 to position 8 where Il the upper 1 and the lower edge 5 come together and the stit-30 ching 9 ~a, may be seen from figure 2 ) i ~ lin d up as 'ruly as ¦¦ possible on the shoe outer face with the inner stitching ¦ of ornamental stitchings 6 Insole 2 is made up of a material which, while being asflexible or soft as possible, is not able to be stretched, and for example may be made up of a top piece of leather ¦ backed up with non-stretch material under it, as for example textile materialr the backing of textile material being l joined with the top leather over its full lower side.
¦ It will furthermore be seen from the figure that the molded outsole 4 has a specially formed top side acting as a foot seat or bed in which respect there is only one upwardly curved part 10 like a ball.
¦ It is furthermore to be noted that the edge 5 of the upper 1 in the shoe of the present invention is placed right against the material of the molded (for example CASt) outsole 4. The outcome of this is that the outsole 4 may readily be joined without any trouble to the lower side 11 of edge 5 and, for this reason, with the rest of the upper 1. On the l one hand, the lower side 11 of edge 5 is normally in any case 20 ¦¦ rough, because it is normally the flesh side of the material.
¦ On the other hand r without any danger of fauling the upper ¦ over the part onto which the sole is to be moldedl the lower fac'e 11 of the edge 5 may be skived or coated with a substance l for promoting adhesion.
25 1 It will be seen from the account giverl so far that the shoe of the present invention makes do without any midsole at all so that it is very much more flexible than known flexible shoes and on the other hand the adhesion between the upper and the outsole is increased: in point of fact,in known shoes of the present sort, the join between the sole and the upper is 11 only produced by way of the stitching between the midsole and a--` li I
5 g 2 5 2 I the upper.
Il An account will now be given of way of producing the ¦! shoe of the present invention.
ll Firstly the upper 1 is produced by stitching together ¦l its separate stamped-out parts, the edge S, as may be seen from figure 1, being made somewhat broader than is in fact necessary, having in mind the form of the completed shoe (figure 2). Nextly, at least one line of ornamental stitching ¦ 6 - or possibly only a marking - is produced running parallel 10 II to the outer limit 12 of edge 5 on the upper 1; ornamental st-~tching may for example be produced using a foot with a ¦¦ stop. Then a stamped or clicked out insole 2 is stitched along its outer limit 7 in the stitched-together, formed upper in such a way that the line 9 of stitching is run exactly 15 l¦ along one of the lines 6 of ornamental stitching, which, at ~ -Il this stage, has the function of a marking, or the stitches ¦¦ are produced along a special marking. The shoe top part so produced and made up of the upper l and insole 2 is then put I¦ on a last 13 (figure 1~, having on its lower side inwardly ¦
20 ~¦ and outwardly curved parts 14 fox making the desired form of foot seat or bed. On placing the top part 1 and 2 on the last 13, care has to be taken to see that the outer limit 7 ¦¦ of the insole 2 is completely parallel to the lower edge 15, ¦
¦l which is normally present on a last, as will be clearly seen 1 in figure 1. The shoe top part now on its last is then placed in a mold, whichr as may be seen from figure 1, is made up of two moving side parts 16 and 17 and a vertically moving floor part 18 and two side keepers 19 and 20. The motion of the !I mold parts isl in this respect, such that the floor part 18 30 1' is moved upwards, after the last 13 has been put in the mold, into the position of figure 1 and at the same time side parts _ g _ ~1 ~ ~
1 ~592~2 16 and 17 are moved inwards, the edge 5 having its part runnin~
I¦ out past the outsole 4 resting on the top of the side parts !¦ 16 and 17. Lastly, -the side keepers 19 and 20 are then moved Il into the position to be seen in figure 1, only one ~otion in 5 ¦1 a downward direction or a mixed motion downwards and inwards taking place. A mixed motion inwards and downwards is best, because in this case the top shoe part 1, 2 on its last may be more simply moved into the mold. ~fter shutting the mold, by way of a pipe (not fisured) the material for the outsole, as for example polyurethane or vinyl foam material is injected or teemed into the mold space 21 where it is cured or, if necessary, foamed. Before moving the last 13 with the shoe top part made up of the upper 1 and the insole 2, into the mold, l it is furthermore possible for a backing 3 to be placed on the 1 insole and fi~ed in position in some way or other, for e~ample by way of adhesive which is only put on in dots. Once the outsole 4 is hard enough, the mold :is opened and it is then ¦ only necessary for the parts of the edge 5 running out past ¦I the outer limit 22 of the sole 4 to be trimmed back, for example j using a knife so that the shoe is then completed.
~ hen the material for forming the outsole 4 is run into the mold hollow 21, it has the effect of forcing the backing 3 and, for this reason, the insole 2 against the lower side 23 Il of last 13 so that any inwardly and outwardly curved parts of 1! the last lower side will be responsible for forming e~ual and Il opposite curved parts on the top side o~ the outsole 4.
¦I For getting better adhesion of the outsole 4 on the edge 5, the same may be produced with an adhesion promoter or adhesive I on its lower side before shutting the mold.
¦1 It is lastly to be pointed out that the outsole 4 can naturally enough be of any desired design, it only being 1 1592s2 ¦¦ necessary for the inner walls of the mold hollow 21 to be ! given the necessary form. For example the outer limit 22 ~l of the sole may be profiled without any chance of damage I¦ because after taking the outsole from the mold, only a 5 ¦I generally thin and soft outwardly running strip has to be cut of the edge 5 of upper 1. Furthermore, with respect . ¦ to the mold, the figures are naturally only diagrammatic and details of the mold design will be dependent on the special form of the upper and the sole. ¦~
!l .
9 ~ ~ 2 11 ;
¦Backqround of the invention The present invention is with respect to foo~wear with a Il molded, as for example injection molded, outsole and having an : I upper stitched to insole covering the top side of the outsole, : ~ and with an outwardly running lower edge trimmed back after molding of the outsole. The invention is furthermore with ~¦respect to a process for producing such a piece of footwear l¦in the case of which the upper is stitched together from I I!clicked out pieces of material, and then the insole is stitched to the upper and, lastly, after putting on a last,the upper ~of the shoe produced on these lines has the outsole molded on iit.
There are a number of different sorts of shoes with molded llon soles. In the case of sorts of shoes in which the lower edge 15 ¦1 of the upper is turned inwards, as is normally the case, there is on the one hand a shortcoming inasfar as,before molding the sole, the upper has to be skived and rough scoured because ilotherwise the sole will not be strongly adhesively joined to~the ~59252 ¦¦ upper. Such working steps undertaken by hand are responsible ¦ in every case for irregular processing. Furthexmore, on puttin~ ¦
on the adhesive or cement, there is the danger, if the worker l does not take great care, of getting some of it on parts of ! the upper which are later not covered by the molded sole and ¦ any such undesired adhesive will have to be taken off later 11 (if at all possible) in a further working step. Further trouble on producing such footwear is likely in connection with lasting:
I If the shoe top part is not completely truly and regularly lasted, the outcome will be a lower quality.
In the prior art flexible footwear (that is to say footwear whose outwardly turned edges of the uppers are joined to the outsole) has been produced with molded outsoles (see German !¦ OffenlecJun~sschrift specification 2,830,605), in ~he case of I which a generally stiff midsole with the function of an insole is joined to the upper at its outwardly ~urned edge and then the ou~sole is molded on the midso:le. There are a number of ¦~ troubles wi-th such a process: On the one hand, because the mid-~I sole is generally stiff, it is hard to get the shoe regularly ¦ lasted for molding, while on the other hand after molding the j midsole has t~ be trimmed back together with the edge of the ¦ upper. Because the material to be trimmed here is generally ¦ thick, heavy machines have to be used for tri~min~. Furthermore, Il scouring is frequently necessary~ On using heavy trimming 25 1¦ machines, there is the further danger of damage to specially produced embossed patterns and a loss of ~uality in this respect as well. Lastly, in prior art footwear with a midsole, there is a shortcoming inasmuch as the molded on outsole is I only adhesively joined to the midsole, that is to say the 30 ¦1 outsole is only fixed to the upper by way of the stitching between the upper and the midsole. Such stitches are, however, of limited strength.
Il , I
1~ 1 1592~2 ¦ General outline of the invention One purpose of the present invention is that of designing I a style of shoe with a molded outsole which is free of the ¦ shortcomings noted in connection with the prior art and which ¦ more specially may be regularly lasted, is responsible for a strong adhesive joln of the outsole on the upper and makes possible simple finishing operationson the shoe once the ¦ outsole has been molded.
l For effecting this purpose and further purposes in the 10 ~ invention, a shoe of the sort noted at the start i5 SO designed that the insole has a size answering to the edge of the last where the upper part of the last and the sole part of the last come togetherl and the outer limit of the insole is fixed to the point at which the upper and the outwardly directed edge on the same come together,and furthermore the outsole is molded ¦directly onto a lower face of the lower edge of the upper, such Imolding being undertaken for example by injection molding or ¦by casting, ; ~ It will be seen from this that, unlike known shoes of the 20 I flexible footwear style,in the shoe of the present invention ¦
the insole only goes as far as the line at which the upper ¦and the outwardly running edge thereon come together. This is ¦responsible for the very useful effect that the molded shoe l sole is directly joined with the leather of the upper itself ¦ and furthermore, generally, molding is on the flesh side of t the leather, where no roughing or scouring of the leather will be necessaryO Nevertheless, more specially on using an adhesion ¦¦promoter, the sole will be very strongly joined adhesively to ~the outwardly turned edge or flange of the upper. After casting )¦or molding the sole on the shoe of the present invention it is then only necessary for the leather of the upper to be trimmed back to si~e, a simple ~ork1ny tep only needing light tools.
` 1' 11S92~2 ¦ Furthermore, no scouring or the like is necessary so that there is no danger of damaging the sole. Furthermore, because the insole only goes as far as the line where the upper and the edge of the upper come together, there is the useful 5 ¦ effect that the size of the insole is quite the same as that ¦¦ of the last. Because of this, the shoe or other piece of ¦ footwear may be lasted very regularly for molding the outsole, because the machine worker undertaking the lasting operation has the chance of guiding himself exactly by the edge (normally ~0 present at the lower part of the last) limi~ing the sole face or area. In fact, it is only necessary for the outer limit ¦ of the insole to be lined up with this edge on the last, this ¦ being a specially simple operation if the insole is made of ¦ highly flexible material with only a low dégree of stretch, 15 ¦ because if the shoe parts are wrongly lasted, it will be ¦ simple to make out the position o the last edge through the flexible materia~. The use of the very flexible insole further-more is responsible for the useful effect that all in all a 1¦ very flexible shoe lower part is produced, something which ¦
20¦¦ has not been true so far with all flexible footwear~ this ¦¦ being more specially because of the normally great thickness ¦¦ of the midsole and furthermore because of the frequently used ¦¦ adhesive between the insole and the midsole.
¦~ It may be seen from this that this shoes of the present 251! invention are di-fferent to prior art shoes so far inasfar as Il they are much better(and more specially more exactly)processed ¦¦ while on the other hand offering a high degree of flexibility.
Furthermore, it is possible for a relatively large amount ~ of material be saved in respect of the midsole, because in fact 30¦¦ an insole is, in any case, normally used in addition and as a backup.
1~
Il I
li 1 1~2~2 I The insole may be made of a number oE different ma-terials.
Specially good wearing properties are produced if the insole ' is made of leather and is backed up under it by backing 1~ material which may not be or only partly be stretched, more ~l specially textile material and which is best fixed to the full lower face of the insole. I
l~ It is furthermore possiblel as part of the present invention, ¦
11 to have ornamental stitching at the lower edge of the upper, ¦¦ such stitching being evenly spaced from the outer limit of ~¦ ~he lower edge and only going through the upper, a special line ¦¦ of stitching running along such stitching for fixing the insole ¦
il to the upper. Such ornamental stitching may be simply produced, makes for a good-looking shoe and, at the same time, may be simply used as a marking for stitching the insole in position. Il I By a careful selection of the position of the ornamental stit- ¦
¦ ching it will be covered over under the structure by the cast~-on ¦
outsole so that there is no danger of water making its way through the stitching.
'¦ The comfort of shoes of the present invention for the wearer 20 1l may be stepped up if, in the known way, a backing, made for example of felt, other non-woven material or the likel is put ~in posltion in the molded outsole under and next to the insole.
I This backing is responsible for specially useful effects in llthe shoe or other footwear of the present invention because Inormally a highly flexible insole is used.
¦~ More specially on using such a highly flexible insole, the j molded outsole may have upwardly or downwardly curved parts ¦forming a foot seat or bed and which may be simply produced by ~1 1 ¦Imolding on the outsole. For this purpose~ it is only necessary 30 1I for the lower side of the last used on casting or molding to have inwardly or outwardly curved parts.
~!
~ 2 ¦ A piece of footwear of the present invention may be ¦ produced in a number of different ways, in which respect the upper will be stitched toge-ther fror;lclicked pieces o~ mate- ¦
rial and then stitched to the insole, whereafter, lastly, after lasting,the outsole is molded onto the shoe top part so produced. In the present invention a special way of producing such a shoe is put forward which is characterized in that before fixing the insole in position, the stitched together upper has an ornamental line of stitching or marking produced marking the inner limit of the outwardly turned edge of the upper and keeping an unchanging distance from the outer limit of the lower edge of the upper and then the insole is stitched to the upper by way of its outer edge l ~long this ornamental line of stitches or marking and then when the top part of the shoe is then put on the last, it is so lined up in relationto the lasl that the outer edge of the insole is running along an edge oll the sole side of the last.
Such an operation is responsible on the one hand for the ~ useful effect that the ornamental stitching or marking may 201¦ be produced at quite the desired positionl that is to say ¦¦ so as to bQ dependent on the position of the limit of the I¦ lower edger because the limit o~ the lower edye is produced Ii by the stamping cut quite exactly. ~long the ornamental ¦I stitching or marking, the insole may then be quite exactly 25¦l stitched into position without any trouble. The stitched-in ¦ insolel together with the limit at the lower side of the last ~ then makes possible trouble-free and completely regular lasting ¦ of the top part of the shoe for molding so that the molded ¦ outsole will be seated in generally ~uite the same position 30 ¦ on the upper or top shoe part on each and every shoe or other piece of footwear produced.
I
l .
List of fiqures and detailed account of workinq example ¦ of the invention Further detailst developments and useful effects of the invention will be seen from the account now to be given of one preferred working example of a piece of footwear - in the present case a shoe as part of the invention.
Figure 1 is a cross-section through the vamp part of a l shoe of the present invention and the ~old used I I for producing it.
1011 Figure 2 is a cross-section on the same lines as figure 1 -~
j' after the shoe has been taken from the last and trimmed to size.
The shoe of the present invention has, as will readily be seen from figure 1 t a normal upper 1 at whose lower end 151 an insole 2 is stitchedt there furthermore being a backing 3, ¦
for example of felt, other non woven material or the like, ¦ and a molded (in the present case,cast) outsole 4.
¦~ As is the case with the prior art flexible shoes, the ~¦ upper 1 has an outwardly turned lower edge 5 or flange which, 20 I in the present working example, has two ornamental Iines of stitching 6 only running through the lower edge 5. However, j the stitching may be generally coarse.
¦¦ The insole 2 is in the shoe of the present inve~tion only ¦¦ of such a size that its outer limit 7 ls at the position a 251'1 where the upper 1(in the limited sense of the word)and the lower edge 5 come together. In other words,it is at the transition between upper and upper edge. The insole is stitched ¦ along its outer limit 7 by stitching 9 to position 8 where Il the upper 1 and the lower edge 5 come together and the stit-30 ching 9 ~a, may be seen from figure 2 ) i ~ lin d up as 'ruly as ¦¦ possible on the shoe outer face with the inner stitching ¦ of ornamental stitchings 6 Insole 2 is made up of a material which, while being asflexible or soft as possible, is not able to be stretched, and for example may be made up of a top piece of leather ¦ backed up with non-stretch material under it, as for example textile materialr the backing of textile material being l joined with the top leather over its full lower side.
¦ It will furthermore be seen from the figure that the molded outsole 4 has a specially formed top side acting as a foot seat or bed in which respect there is only one upwardly curved part 10 like a ball.
¦ It is furthermore to be noted that the edge 5 of the upper 1 in the shoe of the present invention is placed right against the material of the molded (for example CASt) outsole 4. The outcome of this is that the outsole 4 may readily be joined without any trouble to the lower side 11 of edge 5 and, for this reason, with the rest of the upper 1. On the l one hand, the lower side 11 of edge 5 is normally in any case 20 ¦¦ rough, because it is normally the flesh side of the material.
¦ On the other hand r without any danger of fauling the upper ¦ over the part onto which the sole is to be moldedl the lower fac'e 11 of the edge 5 may be skived or coated with a substance l for promoting adhesion.
25 1 It will be seen from the account giverl so far that the shoe of the present invention makes do without any midsole at all so that it is very much more flexible than known flexible shoes and on the other hand the adhesion between the upper and the outsole is increased: in point of fact,in known shoes of the present sort, the join between the sole and the upper is 11 only produced by way of the stitching between the midsole and a--` li I
5 g 2 5 2 I the upper.
Il An account will now be given of way of producing the ¦! shoe of the present invention.
ll Firstly the upper 1 is produced by stitching together ¦l its separate stamped-out parts, the edge S, as may be seen from figure 1, being made somewhat broader than is in fact necessary, having in mind the form of the completed shoe (figure 2). Nextly, at least one line of ornamental stitching ¦ 6 - or possibly only a marking - is produced running parallel 10 II to the outer limit 12 of edge 5 on the upper 1; ornamental st-~tching may for example be produced using a foot with a ¦¦ stop. Then a stamped or clicked out insole 2 is stitched along its outer limit 7 in the stitched-together, formed upper in such a way that the line 9 of stitching is run exactly 15 l¦ along one of the lines 6 of ornamental stitching, which, at ~ -Il this stage, has the function of a marking, or the stitches ¦¦ are produced along a special marking. The shoe top part so produced and made up of the upper l and insole 2 is then put I¦ on a last 13 (figure 1~, having on its lower side inwardly ¦
20 ~¦ and outwardly curved parts 14 fox making the desired form of foot seat or bed. On placing the top part 1 and 2 on the last 13, care has to be taken to see that the outer limit 7 ¦¦ of the insole 2 is completely parallel to the lower edge 15, ¦
¦l which is normally present on a last, as will be clearly seen 1 in figure 1. The shoe top part now on its last is then placed in a mold, whichr as may be seen from figure 1, is made up of two moving side parts 16 and 17 and a vertically moving floor part 18 and two side keepers 19 and 20. The motion of the !I mold parts isl in this respect, such that the floor part 18 30 1' is moved upwards, after the last 13 has been put in the mold, into the position of figure 1 and at the same time side parts _ g _ ~1 ~ ~
1 ~592~2 16 and 17 are moved inwards, the edge 5 having its part runnin~
I¦ out past the outsole 4 resting on the top of the side parts !¦ 16 and 17. Lastly, -the side keepers 19 and 20 are then moved Il into the position to be seen in figure 1, only one ~otion in 5 ¦1 a downward direction or a mixed motion downwards and inwards taking place. A mixed motion inwards and downwards is best, because in this case the top shoe part 1, 2 on its last may be more simply moved into the mold. ~fter shutting the mold, by way of a pipe (not fisured) the material for the outsole, as for example polyurethane or vinyl foam material is injected or teemed into the mold space 21 where it is cured or, if necessary, foamed. Before moving the last 13 with the shoe top part made up of the upper 1 and the insole 2, into the mold, l it is furthermore possible for a backing 3 to be placed on the 1 insole and fi~ed in position in some way or other, for e~ample by way of adhesive which is only put on in dots. Once the outsole 4 is hard enough, the mold :is opened and it is then ¦ only necessary for the parts of the edge 5 running out past ¦I the outer limit 22 of the sole 4 to be trimmed back, for example j using a knife so that the shoe is then completed.
~ hen the material for forming the outsole 4 is run into the mold hollow 21, it has the effect of forcing the backing 3 and, for this reason, the insole 2 against the lower side 23 Il of last 13 so that any inwardly and outwardly curved parts of 1! the last lower side will be responsible for forming e~ual and Il opposite curved parts on the top side o~ the outsole 4.
¦I For getting better adhesion of the outsole 4 on the edge 5, the same may be produced with an adhesion promoter or adhesive I on its lower side before shutting the mold.
¦1 It is lastly to be pointed out that the outsole 4 can naturally enough be of any desired design, it only being 1 1592s2 ¦¦ necessary for the inner walls of the mold hollow 21 to be ! given the necessary form. For example the outer limit 22 ~l of the sole may be profiled without any chance of damage I¦ because after taking the outsole from the mold, only a 5 ¦I generally thin and soft outwardly running strip has to be cut of the edge 5 of upper 1. Furthermore, with respect . ¦ to the mold, the figures are naturally only diagrammatic and details of the mold design will be dependent on the special form of the upper and the sole. ¦~
!l .
Claims (11)
1 In a piece of footwear having a molded outsole, an upper joined by way of a line of stitching with an insole covering the top of the outsole, the upper having an outward-ly turned edge trimmed to size after molding the outsole, the invention residing in that the insole is of such a size that its outer limit is lined up with the edge of the last marking the line at which the upper and the sole of the shoe come together and the insole is fixed to the position along which the outwardly turned edge of the upper is next to the rest of the upper and the outsole is molded on the lower side itself of the outwardly turned edge of the upper.
2 A piece of footwear as claimed in claim 1, wherein said insole is made of highly flexible material with a low degree of stretch.
3 A piece of footwear as claimed in claim 1, wherein said insole is made of leather, the insole having on its lower side a backing of material with a low degree of stretch.
4 A piece of footwear as claimed in claim 3, wherein said backing is textile material.
A piece of footwear as claimed in claim 3, wherein said backing is fixed to said insole over generally the full lower side thereof.
6 A piece of footwear as claimed in claim 1, wherein at the lower edge of the upper, there is a line of ornamental stitching spaced evenly from the outer limit of the lower edge and only running through the upper, a separate line of stit-ching running along said line of stitching for fixing the insole to the upper.
7 A piece of footwear as claimed in claim 1, having under the insole itself a backing placed in the molded outsole and placed right under the insole itself.
8 A piece of footwear as claimed in claim 7, wherein said backing is made up of non-woven material.
9 A piece of footwear as claimed in claim 1, wherein said molded outsole has a top side with inwardly and outwardly curved parts forming a foot seat.
In a process for producing a piece of footwear in which an upper is stitched together from clicked pieces of material, then an insole is stitched to the upper and lastly the shoe top part so produced is placed on a last and an outsole is produced by molding, the invention residing in that before fixing the insole in position, the upper is marked to make clear the inner limit of the outwardly turned edge, and an even distance from the outer limit of the lower edge and then the insole is stitched at its outer limit along the line so marked and then, on placing the shoe top part on a last, the shoe top part is so lined up in relation to the last that the outer limit of the insole is lined up with an edge on the sole side of the last.
11 A process as claimed in claim 10, wherein said line of marking is in the form of a line or ornamental stitching.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803046050 DE3046050A1 (en) | 1980-12-06 | 1980-12-06 | SHOE WITH MOLDED OUTSOLE AND METHOD FOR THE PRODUCTION THEREOF |
| DEP3046050.5-26 | 1980-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1159252A true CA1159252A (en) | 1983-12-27 |
Family
ID=6118496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000390993A Expired CA1159252A (en) | 1980-12-06 | 1981-11-26 | Shoe with a molded outsole and a process for making the same |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0053761B1 (en) |
| AT (1) | ATE12720T1 (en) |
| CA (1) | CA1159252A (en) |
| DE (1) | DE3046050A1 (en) |
| DK (1) | DK538181A (en) |
| ES (1) | ES8300446A1 (en) |
| FI (1) | FI813584L (en) |
| NO (1) | NO814120L (en) |
| PT (1) | PT74083B (en) |
| YU (1) | YU284481A (en) |
| ZA (1) | ZA818117B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106174895A (en) * | 2016-08-28 | 2016-12-07 | 瑞安市宏达皮塑机械厂 | Rubber sole pressing machine |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3300881C2 (en) * | 1983-01-13 | 1985-05-02 | Heinrich 4190 Kleve Wasser | Method and device for injection molding the outsole of a shoe of the flexible design |
| DE3539209A1 (en) * | 1985-11-05 | 1987-05-07 | Ortwin Mueller | Method of manufacturing shoes and shoe manufactured according to the method |
| GB2197577A (en) * | 1986-11-21 | 1988-05-25 | Shoemakers Ltd | Shoe wlth stitched-in sock |
| GB9001287D0 (en) * | 1990-01-19 | 1990-03-21 | Clark C & J Int Ltd | Footwear |
| ES2117932B1 (en) * | 1995-07-05 | 1999-04-01 | Trujillo Jose Salcedo | IMPROVEMENTS IN THE MANUFACTURE OF FOOTWEAR PLANTS. |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1156460A (en) * | 1956-07-20 | 1958-05-16 | Baudou Soc D Expl Des Ets | Method of fixing a shoe upper to the sole and resulting product |
| DE2725622A1 (en) * | 1977-06-07 | 1978-12-21 | Linnemann Friedrich | Shoe with welt of upper turned outward to sew onto polyurethane sole - with pre-punched holes along edge of welt to facilitate sewing |
| US4182055A (en) * | 1977-10-13 | 1980-01-08 | Genesco, Inc. | Shoe construction with pre-formed sole |
| DE2830605A1 (en) * | 1978-07-12 | 1980-01-31 | Desma Werke Gmbh | DEVICE FOR MANUFACTURING FOOTWEAR WITH A SIDE-ORIENTED EDGE OR FRAME |
-
1980
- 1980-12-06 DE DE19803046050 patent/DE3046050A1/en not_active Withdrawn
-
1981
- 1981-11-12 FI FI813584A patent/FI813584L/en not_active Application Discontinuation
- 1981-11-23 ZA ZA818117A patent/ZA818117B/en unknown
- 1981-11-26 CA CA000390993A patent/CA1159252A/en not_active Expired
- 1981-11-26 AT AT81109919T patent/ATE12720T1/en not_active IP Right Cessation
- 1981-11-26 EP EP81109919A patent/EP0053761B1/en not_active Expired
- 1981-12-02 ES ES507645A patent/ES8300446A1/en not_active Expired
- 1981-12-03 NO NO814120A patent/NO814120L/en unknown
- 1981-12-04 PT PT74083A patent/PT74083B/en unknown
- 1981-12-04 YU YU02844/81A patent/YU284481A/en unknown
- 1981-12-04 DK DK538181A patent/DK538181A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106174895A (en) * | 2016-08-28 | 2016-12-07 | 瑞安市宏达皮塑机械厂 | Rubber sole pressing machine |
| CN106174895B (en) * | 2016-08-28 | 2021-09-07 | 温州市宏川机械有限公司 | Rubber outsole pressing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| ES507645A0 (en) | 1982-11-01 |
| ATE12720T1 (en) | 1985-05-15 |
| DK538181A (en) | 1982-06-07 |
| FI813584L (en) | 1982-06-07 |
| DE3046050A1 (en) | 1982-06-09 |
| PT74083A (en) | 1982-01-01 |
| EP0053761B1 (en) | 1985-04-17 |
| EP0053761A3 (en) | 1982-10-06 |
| EP0053761A2 (en) | 1982-06-16 |
| ZA818117B (en) | 1982-10-27 |
| YU284481A (en) | 1984-02-29 |
| PT74083B (en) | 1983-06-15 |
| ES8300446A1 (en) | 1982-11-01 |
| NO814120L (en) | 1982-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5911491A (en) | Welt shoe comfort system | |
| US6226895B1 (en) | Footwear construction | |
| US4034431A (en) | Method for manufacturing a footwear | |
| US4003145A (en) | Footwear | |
| US5351352A (en) | Method of forming a seamless shoe | |
| US4353173A (en) | Insoles for skate boots | |
| US20010016991A1 (en) | Method of manufacturing a composite vapor-permeable insole and insole thus obtained | |
| US3952358A (en) | Shoe and a method for manufacturing the same | |
| JPS622902A (en) | Production of shoes | |
| CA1159252A (en) | Shoe with a molded outsole and a process for making the same | |
| US2436050A (en) | Platform type shoe and method of making same | |
| US2530737A (en) | Shoe molded to shape of foot | |
| US4523346A (en) | Method and device for the manufacture of footwear | |
| US4122574A (en) | Method of making footwear | |
| US4519147A (en) | Footwear having cushion cavity | |
| US3332097A (en) | Footwear and method of its manufacture | |
| US4597125A (en) | Method of stiffening an insole during the cement lasting of footwear | |
| US4451949A (en) | Safety shoe and method for making same | |
| US3133360A (en) | Shoe construction having upper secured within groove of sole ring | |
| US6584705B2 (en) | Shoe having simplified construction | |
| CA2224285C (en) | Manufacture of sandals | |
| EP0071088A1 (en) | Method for making an inner shoe particularly for ski boots | |
| GB1248959A (en) | Production of individual footwear | |
| US3729843A (en) | Soft-soled foorwear | |
| US3800445A (en) | Method and apparatus for making scuff slippers and the like |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |