DE1679967A1 - Liquid-tight container and process for its manufacture - Google Patents

Description

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Dr. Walter Beil

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Frankir ::, a.M.-i-l3chst

i £ i - TeL 3i 2049

Our no. 13 728

Chevron Research Company San Francisco, CaI., V.St.A.

Liquid caits-tight container and process for its manufacture

The invention relates to a packaging, in particular a container with seamless base made of plastic or the like, which is made from a flat molding An upright shape with a square or right-angled cross-section can be unfolded and used for the packaging of food, e.g. milk can.

The aim of the invention is to produce an inexpensive molded article that is too A liquid-tight container can be shaped and erected from the beginning is provided with a seamless solid floor construction. Without an additional closing of the edges along the container bottom, the molding can close a stable container with a rectangular or square cross-section · According to the invention, it is now possible to use a container with specialist personnel occupied central office to produce an inventory of moldings and these at a more distant country location, mostly using existing manufacturing facilities without the addition of a complicated locking device for

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to unfold the bottom edges to form robust containers "

The invention includes a method of fabricating the container form rings and to unfold the same to complete BehSlgern as well as the for it required facilities.

Until now, containers were made from flat pieces of plastic coated with plastic Cardboard j the flat pieces came from coated gray carpet sheets. These arches were notched along their surface in such a way that the container forraling was present in the desired delimitation.First, the moldings were left open along several edges.But to produce a closed container, must of course the edges ζ · Β · along the vertical side, the bottom and the The apex of the bricks will be versc · This sealing at the edges does not take place continuously, but usually in steps Open structure closed at the top The container is then filled with a liquid, e.g. with milk, or in some cases with solid substances, and the container is then closed at the top. It is particularly critical the bottom seal, and not only because an escape of the container— content must be avoided, but also with a view to the fact that the bottom Must be more or less lfacher in order to keep the container stable in an upright position to keep·

Materials have been proposed for the production of such containers entirely from plastic in order to avoid the need for a separate plastic coating on the outside of the container, to achieve a more complete closure at the bottom and to increase the impact resistance and resistance. However, several difficulties stood in the way of such a development, for example ι

1} The bottom seals must have sufficient «resistance and reasonable Impact strength can be produced at the same time as low form in order to be able to carry the container stably in its normal, upright position · Where the closure is in remote operating facilities with personnel without specialist knowledge on the

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Plastics sector, inadequate closures predominate in this regard

2) The near production costs for plastic containers must be reduced which is partly made up of the amount of plastic material required to stabilize the container, which is necessary to make the container without a handle resistant to being picked up by the leg - either to empty it or to remove it, z «B« to put in a refrigerator - applying the necessary pressure, results in *

3} The development of a plastic container for use in automatic scoring, unfolding and filling devices in the countryside requires a considerable investment on the part of rural processing · by some In order to overcome these difficulties, the manufacture of a synthetic material identical to the cardboard molding was proposed. The molding should then folded into a container in a central point and sealed at the bottom the finished container would have to be sent to a filling station « In this way the completion in the central office could through in the art Material handling should be carried out by trained staff high processing costs potential buyers are opposed to using such Container unwilling to show "

According to the invention, the invention relates to an inexpensive production Plastic molding produced in the following way and ready to be filled Unfolded container:

i () Extrusion or blow molding of a tubular preform with at least one side wall, one open end and a closed, circular arc-shaped end edge opposite, the latter at the end of the sides » wall is formed in the initial manufacturing stage as long as the plastic is machinable,

(2) cooling the Varfomling to harden it,

(3) Flattening of the cooled preform by pressing opposite side wall parts against one another by means of rollers running against one another,

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Retention of the pressed side wall parts in flat pressed Position by applying the first and second vertically over the length of the preform » ling running fold lines, the ends of each fold line being the ends of the cross the closed suction edge,

(5) Notching several fold lines in the outer broad sides of the forearm, so that a flat container molding is created, the folding pattern preferably dividing the molding into top, side and bottom fields, and

(6} selective unfolding of the fields to form a liquid-tight container with seamless floor construction

When erecting the container according to the invention, the cross winds are thereby formed by applying constantly controlled pressure from the inside against the geometric center along the vertical container fold lines «adjustable Pressure is also applied along the first sheet edge at the bottom of the molding to form the bottom panels into a re-entrant center bath part, the ends of which run in double floor fold-out fields »for precise fastening within the re-entrant cavity of the central part, the fold-out panels can be rotated around the fastening plane on the side walls. Advantages of the molded articles and container according to the invention include;

1) The molding is flat and suitable for stacking and storage in one Central office and for sending to remote processing points

2) The critical sealing of the bottom of the container takes place at the manufacturing site

3} A sturdy, liquid-tight container, the receding bottom of which is one Forms inside, on which the content can exert its compressive forces without any external deformation below the level of their contact with a support surface he follows.

Welters features and advantages of the invention will become apparent from the following description and the accompanying drawings

1 in the demolition of a clock line z ^: \ r production of the invention-appropriate pre »

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Fig «2, 3 and 4 preferred embodiments of the preforms according to the invention,

FIGS. 5 and 6 show a preferred embodiment of a manufactured according to the invention Preform,

Figs. 8 and 9 show a preferred form of the container molding according to the invention,

Fig. 10 the front view of the completed container,

Fig. 11 a section along the line 11-11 in Fig. 10,

Fig.12, 13 and 14 show the design of the container according to Fig.11,

Fig. 15 is a section along the line 15-15 in Fig. 14,

Fig. 16 shows the side view of a machine for the formation of the SabMltar Fig. 11,

Fig. 17 the side view of the container molding according to the invention,

Fig. 1S ₈ 19 and 20 a schematic representation of the mode of operation of the machine according to Fig. 16,

Figs. 21 and 22 alternate views of the bottoms of finished containers »where Fig. 22 shows an alternate notch image,

Fig. 23 and 24 front and back view of the container ^ ormlings ns ^ r: Fig »? and 6 in spawns on a larger scale.

Fig. 1 shows that an extrusion press 10 with a filling box 11 containing plastic pellets "smfinüsn" and with a heating device which keeps the plastic in a soft, operable state for the production of a series of moldings 12 brings, inscribed is "Hechts an He Strangpresse 10 der Abc": further VsrfssTrai-s & rilagen line up * so 2 _a 3s £ ie Sons-id- and WaIz-

1? and the stepsi · «.;: ■ & ·, AopEok ^ crrichtung 18, g« ^: 2 iu ι ■ '-: & *. ■ ΐ> 1 &&% & 3 äv ^ apacktsn Be ⁱ i AH ...-. ^. ; ssiiufiin ^ s *> is ^ Mrar set out

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filled _(after it is heated and passed through the double injection head 23 _$ he that as a fluffy strand 22 zuflieset. Preferably, the shapes \ hinged to one with the symmetry axis the same co-rotating side so each mold half came 20a along axes to each other and to the Line 22 are aligned, swing in, bia sis comes into contact with the matching fixed mold halves 2Gb »To close the molds, suitable triggering devices such as xS · the air cylinder 24 are activated by a central pneumatic display control system in the middle area of the farm» plant 19 The speed at which the molds close is regulated in accordance with the other process _{steps according to the invention. "As mentioned, the} strand 22 is first formed by the injection heads 23 of the extrusion press 10. However, when each mold is closed with the aid of the air cylinders 24 the ends of a strand length from the F orm not closed and fused into one another · At the same time, a »hollow blowing needle (not drawn) protrudes from the mold and penetrates into the. Strand one. Thereupon air penetrates and the cord expands until βγ touches the walls of the mold, where the cord solidifies 'er ^ orns ^ m in the closing of these not run through; so that a continuous belt 12a forms between the protruding row of preforms 12. After the slashing process is complete, water and / or air is also supplied to each mold, for example from rotary distributors on wheel 21, in order to cool the mold and preform

At the outlet from the molds 20, the row of the preforms 12 is aligned so characteristic that they can be supplied to further processing stages "Thus, _'B'} is as shown in Figures" 2, 3, and each preform one to the ends closed cylinder with welded upper and Unterkantsn 29 ce with respect to the geometric with the Vorfomelings are arched, with a continuous side wall between these edges formed _B the scallops 29 are formed as the ends of the strings wall as long as the plastic materiel in molten state "

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According to Fig. 2, the shape of the side wall changes according to the distance from the edges 29. It can have a circular cross-section in the center plane 28, but the cross-section becomes elliptical towards the edges 29. The outside of the side wall is correspondingly changed so that it the continuously obliquely outwardly extending surfaces 32 (Fig. 2) and the obliquely inwardly extending surfaces 34 (Fig. 4), which end at the welded arcuate edges 29 can wcrden also worked with other cross-sectional shapes _f without departing from the scope of the invention "Thus, for example elliptical, the cross-section be" take Preferably, however, dia focal distances of the ellipses between the MittelpunfctssbBne 28 and the verschweisstsn edges 29 corresponding to the distance van represents center plane 28 to and achieve its maximum value at the edges 2S Areas 32 and 34 to the longitudinal axis A Each preform ^ is preferably determined in such a way that the periphery of the varform, along any plane perpendicular to the axis A, remains constant over the entire length of the preform later process steps such as the separation of each preform along the Mittelpunkteabene 28 and the surface pressure of the divided preform, Z ₈ example with the aid of the cutting and rolling device 16, a flat, low container-shaped product, which can be well stacked "on the edges 29 there are also the bands 12a, which connect the preforms to one another in a row

The cutting and rolling device 16 includes the press rollers 24, which in

a cutting unit guide device 25 is arranged upstream, the 4fe

(1) sever the tape 12a and each preform along the center plane 28 ζ · Β · cuts off by knife and

(2) For example, by means of the guide body 26, the divided preforms exactly to the Rolls 24 aligns.

When aligning the preforms, the cut edges 27, ie the edges of the plane 28 in Fig. 6, are preferably arranged so that the verified arc edge 28 first runs through the Wslzmn 24. For the purpose of such an alignment, the guide body 2S selectively rotates those forms by 180 °, the

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: ^ iNAL INSPECTED

The time at which the preforms are separated lie along the plane 28 to the left of the cutting units 25, cf. During the onward movement, opposite segments of the side wall of each preform are pressed onto one another by the rollers (pressed flat) _e

The briquettes emerging from the cutting and rolling device are on fig β 5 and 6 shown in detail · Each molding is with vertical Fold lines 40 and 41 are provided, which form two side panels 42a and 42b running at the same time. The shape of the lower edge 29 remains arched. This results in a segment with a positive slope 36 and a segment with a negative slope 39 " Datpit, the length of the arc edge 29 is greater than the distance from the point of intersection of the edge 29 with the fold line 40 from the intersection of the edge 29 with the Fold line 41. Lines 38 and 39 run preferably, but not necessarily straight across the width of the preforms · The lines * therefore cross in a common point, the vertex 43. Along the upper cutting edges 27, the side panels can open (Fig. 6) to enable tools to be inserted in later stages of the container production process. If the preforms are produced in the manner just described, they turn out to be flat, easily stackable.

In Fig. 1, after the flat press rolls 24 are the first and second main pressure rolls 44, which are paired with the counter pressure rollers 45. This system also includes an inking unit 46 that can be moved across the printing rollers is, as well as a drying device 47 arranged adjacent to the inking unit, by means of which the paint application on the surfaces of the preforms is dried

Furthermore, Fig. 1 shows a notch device 1? for notching the flat pieces after passing through the pressure rollers 44 · For notching device 17 includes, above all sin housing 48 with a lower part 49 and an insert 50. This Einf'ührabeunnitt 50 directs the incoming preforms to which drsnenden KerbwalESit 51 to 52 ₁ with the Counter pressure roller !! S3 and 54 are paired, and ft Lm section # - £ i £ 3 tjS _s paired with the back pressure roller 56 off. Preferably dis ^ g'-b ^ & lH provided ""? 31 and 52 dis styles the flat preforms one after the other

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with siner Raiha of Faltlinisn to prepare the then piled in containers 57 moldings 15 * These rolling preferably have Einan grosaen diameter to several pieces to slot at a time, for the purpose is notching are most Walzsnumgang Matrizansätze with notched sticks oti ^ r -raassern attached " During the rotation, these sticks touch the side feet, each flat piece at the appropriate time. In this way jader molding 15 (Fig.? _T 8 and 9} versehe with side and Endfeldsrn ^ which are clearly delimited by ain corresponding crease line "

The remaining pairs of Walzon 55 and 5S have similar ftfetrizen anodriungsn, but are higher, in order to cut through the notched prefors completely along the upper cutting edge 27 iS is, z "B _e Durah stacking and Aspackvarrichtung 18, iveckmässig coated and aogspacktr the Vorriohtung 18 is varzugsweiiäB of an insertion section 5B _f DIS from the notched device 17 emergent moldings sammslt, and a Austragsabseimitt 59 for mechanical and automatic packaging of parent moldings in cardboard boxes 57 «Jade's clay container contains a predetermined number of moldings 15 for dispatch to the more distant filling station _e

To dsn Figure "7 and 8, the Viarbbii ^ usr ία the Sshältnissen S7 packaged blanks IS, is vsranschsulichte It is arkennenj that each stepping out ?, from dsr notching device 17 BahnJLcer-Fonnling is divided by Faltiinisn in a number of Faldzongri. Rk'islish in ains Mittalfoldzens 7Q ₈ sine Bodenfeld- zorm 71 and sir.a Schsitelverashlusasans? 2 ₆ Disns "rnon öildesi ü ± b Oeitenwönds, di # Boc ^ nwanc! and ümn 5aheifcslv? ers5hiyss of the fe'tigsn BsNSItQr ^ a over the upper cut edges 73, this horizontal fold lines 74 and 75 and the lower sheet edge 29 ebgegreost *

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Cut the curved edge 29 'The corner fold lines' - cross the Milfcal fold lines 74 and 75' Jade Eci3 'Fsltlinie I3 runs parallel to the side wall F5.1tiinie;' s 40 and 41 vnü crosses the horizontal fold lines 74 and 75, so that there is a frontal line -SeITR ₁ - * - and HÜGkssitsrifeiriar are delimited in total _# the front fields 80, Si and 82 with cer * W nkfelder »! 83, 84 and 35 correspond. In the vertical direction, laöss Ssitsnfeld did a corner connection with de; * »! adjoining Ssitsrfslde So ental'sht sir kantinuisrlisher, liquid ^ '- shter side lock around the inside of the Fmmlxngs »

If the vertical eskfsltlines 7S ₁ 7? and 7S and 73 nsch outside ulter SiX-dung of the container corner unfolded wsi-xien _e wercian the individual fields away from each other and form the walls of the container * Ds six fields are provided for the formation of the four side walls, wsrdan the two non-adjacent string halves, namely is the fields BC and B3 and S2 and 83 folded inward along the fold lines 40 New York Convention 4 ", to each pair in siner overall meinssunait plane oriented iat _v that a single side wall of the container geechaffsn" the remaining Feldsr 81 and S4 form the remaining walls of the container. The fields are formed on the same side as the deflection of the side fields 80, 82, 83 and 8S.

The oil zone 71 is placed in the bathing wall of the finished container.It is connected to the lower edges of the side panels along the fold line 75 and delimits the front and rear floor closures, the panels 87, 88 and 69 on the front and the Corresponding to fields 90, 91 and 92 on the reverse side. These fields all end along the curved edge 29 and form a liquid-tight , varschweißsts seam. The checkered pattern of the floor fields has the following deviations, as shown in the figures: The first and second nonadjacent pairs of fields with fields 87 and 92 as well as 89 and 90 are designed so that they go along with the field pairs 88 and 91 along the extensions 93, 94, 95 and 96 of the vertical corner fold lines 76, 77 and 78 and 79 are connected. The bottom panel 87 is also in a vertical cantilever connection with the panel 92 along a lower section of the vertical fold line 41; likewise, the field 89 has an edge bond with the field 90 along the vertical fold line 40. In each field there are 67, 89, 90 and 92

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symmetrically aligned diagonal fold lines IQSa, 1CSb, 103a and 103b, which run from the intersection of the horizontal fold line 75 with the corner fold lines 76, 77, 73 and 79 to the intersection of the vertical fold lines 40 and 41 with the curved edge 29.

Although the transversal delimitations of the Bodsnfelder are similar to those of the String Fields, the Bottom Fields primarily show an upward folding direction towards the geometric center of the Bahalter Parmling. In order to ensure that the corners fit together at the intersection of the bottom and side panels, the extensions 93, 34, 95 and 96 are inclined slightly below * towards the fold lines 40 and 41, preferably, but not necessarily, the extensions run perpendicularly the lower sheet Kant 2S _e LSngs these extensions and diagonals 102a _f 102b, 103a and 103b.werde "shaped the Bodsnfelder so that in the finished container a central Qu & rbodenwand results in" the srfindungsgemasse Badenwandung is indeed formed from these Bodenfwidern, but its final Direction differs greatly.Therefore, in the following special numbers are used to identify the shape of bathing walls and their elements - such as in Fig.10 and 11, in which the illustrated bottom wall 95 of the finished container consists of a flat central base 98 and two double display fields 100 and 101 exists.

The relationship between the bottom wall 97 and the bottom panels of the container- Moldings can best be obtained from a comparison of the container according to Fig. with the molding according to Figs. 23 and 24.

The figures show that the triangular fold-out fields and 101 are formed from bathing panels that are halved by the lower extensions of the vertical fold lines 40 and 41 · The bathing panels 87 and are converted to the unfolding panel 100 by placing both panels along the diagonal folding lines 102a and 102b are flattened back. Accordingly, the unfolding panel 101 is created from the bottom panels 89 and 90, dia in a similar manner along the diagonal folding lines 103a and 103b are flattened back. In addition, the fold-out panels 100 and 101 are almost connected to the side panels 80, 82, 83 and 85 along the horizontal fold line 75. The fold-out fields are still shown lengthways

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Fait lines 93 and 96 or 94 and 95 firmly connected to the main floor 98

and are at the same time at their apices 104 by adhesive on the main baths attached.

The main floor 98, on the other hand, in the single-fold design consists only of the floor panels 88 and 91, which are aligned in one plane is connected to the side panels 81 and 84. As shown in Figs. 12, 13, 14 and 15, the curvature is initially concave with respect to the geometric center of the container. In these figures, the molding is shown at the moment of its molding process in which, after pressure has been applied along fold lines 40 and 41 (side wall pairs), panels 80, 82, 83 and 85 have been moved inward. The curvature is then reshaped into a convex curvature opposite the geometric center point by pressing the turn 98 upward through the plane defined by the horizontal fold line 75 and thus forming the container according to FIGS. 10 and 11. The re-entrant bottom wall offers, among other things, the advantage of better loading capacity and increased container stability.

A modification of the notch pattern of the floor panels is shown in Fig. 22; Here these fields are provided in their central area with downwardly directed, but inwardly converging fold lines 105a, 105b, 106a and 106b. These converging fold lines come from the intersections of the horizontal ones Fold line 75 with the vertical fold lines that form the corners of the side panels

which form, from and end at a common point the vertex 43 *

of the curved edge 29 '- - and thus form the triangular fields 107, 108, 109, 110, 111 and 112. These triangular fields are drawn along the converging folds lines 105a, 105b, 106a and 106b are selectively folded and thereby form the ge metric center of the molding opposite pyramidal concave, main base 98 '. The curvature of the wall 98 * is then converted into convex, pyramid-like shape that you can see through the plane of the fold line 75 * leads. The fold-out fields 100 · and 101 · are made up of fields with one of the above formed and while the side walls of the container are formed, unfolded to their triangular shape. This modified container is completed by having the

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ORIGINAL INSPECTED

Fold-out panels 100 · and 101 'with the panel wall 98 · connects. Fig. 22 shows the manufacture of the modified container at the point in time when the wall 98 * is already in a convex shape with respect to the geometric center is present, but before the fold-out panels are connected to the central wall 98 became·

On the Abbe 23 and 24 a number of field extensions are drawn on the upper part of the container, through which the finished container a characteristic closure. The closure also provides an outlet device for the substances in the finished container, e.g. gable-shaped, outwardly movable spout. For the upper field parts 72 Of course, other notch patterns, e.g. flat fold-over gable shapes, can also be used without departing from the scope of the invention, as the The upper closure shown shows only an appropriate, known type such a container closure · To the characteristic shown To achieve a gable shape, these fields can be marked with a horizontal score line

114, which runs parallel to the score line 74. The side roof panels 115, 117, 118 and 120 are defined by these horizontal fold lines and the upper extensions of the fold lines 76, 77, 78 and 79 are delimited. Between these extensions are the roof panels 116 and 119. To each roof panel include the triangular setback fields 133 and 134, which are delimited by the upwardly directed fold lines 135 and 136, which in turn are in the Cut the summit point 137 on the horizontal fold line 114. The remaining roof panels 115 and 120 as well as 117 and 118 are adjacent in pairs and form the side roof panels of the lock · Each pair of side roof panels 115, 117, 118 and 120 is formed by inwardly along fold lines 40 and 41; this causes each pair of panels to swing about this fold line until alignment in a common plane is achieved. The side roof panels

115 and 117 have diagonal fold lines 138, which at one point 139 of the horizontal fold line 114 end. Above the horizontal score line 114 the ribs 140 of the briquette are formed from the roof panels 115, 116, 117, 118, and 120 {they have a number of inner and outer rib panels and also sealing fields that form the ridge of the gable on the finished container. It can be seen that a finished molded part is attached to the molding Container can be formed. Inward pressure can then be applied to the

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End roof panels 116 and 119 are applied to the crown closure close.

As already mentioned, the molding is preferably notched in one place trained personnel are available to carry out the necessary monitoring of the Plastic process can take over · The notched moldings are then usually sent to another processing location and there to a continuous container reshaped

According to Fig. 16, a stationary multi-stage forming machine 145 can be used for erecting the container moldings 15 can be used to make finished containers. She can go with a mandrel device 146 to which the briquettes are fed for subsequent erection. The dome machine rotates by means of a control device (not shown) to various stations at the start of the Mandrel device, whereby various manufacturing stages are run through, including the folding of the side and bottom panels of the briquettes Sidewalls and bottom of the container and stripping the molded containers from the mandrel.

Since the invention is primarily the shape of the bottom closure of the moldings as well as the container, the working stages of the bottom folding represent an integral part of the invention. For folding the molded sod for example, the mandrel device could be in the desired re-entrant shape 146 of the molding machine 145 consist of a turnstile 165 with a plurality of arms 173, so that a number of briquettes successively the various Forming passages can be fed. First, a molding is attached to one of the turnstile arms, for example to the loading stage 166, from there continued to the dwell step 167, then to the folding step 168, further to the Cementing stage 169} here, pressure is applied to the floor in order to create a Glue the fold-out panels 100 and 101 (Fig. 18) to the outer floor surface of the container. The device can then use an empty stage Stripping stage 170 are continued to be applied; here the container is lifted off the mandrel with the aid of an air blower.

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In the course of these operations, the flat moldings are individually cut from one another Stacking support 171 to a body-shaping device 172, by means of which the briquettes are shaped into a container with a practically rectangular or square cross-section and then brought onto one of the arms or mandrels 173. Everyone The mandrel is rectangular or square in cross-section, similar to the container; or it consists of several spokes running radially outwards, the ends of which mark the shape of a desired cross-section. the Body former 172 first applies inward pressure along the Plane of the folding lines 40 and 41 of the molding according to the illustration in Fig. 17 aup, whereby the side panels are pushed inward until side walls of the desired cross-section are formed. Fig. 17 schematically shows the direction in which these thrust forces, which are necessary to form the side walls, act.

To form the fold-out panels 100 and 101 - for example at the folding step 168 - a pusher mechanism 175 belonging to the forming machine according to Fig. 16 is used along the sheet edge 29 at points M and N of the molding according to Fig. 17 Pressure exerted. The floor panels are thus along the diagonal fold lines at the points of the application of pressure, for example along the diagonals 102a and 103a, flattened. The pushing mechanism 175 is controlled by the rotating turnstile so that it gives the tubular container blank a downward movement parallel to the axis of symmetry of the mandrel towards the mandrel. Since the The molding does not need to be welded along its side, it just has to the bottom can be shaped in such a way that a fillable container results. The upper end is closed in a separate operation.

As shown schematically in Fig. 18, the alignment plane of the Fold-out fields forming floor fields parallel to the side fields brought into a vertical position.

The bath to be relocated to re-enter the side walls of the container is formed by applying pressure to the bottom wall of the container. This can be achieved, for example, with a compressed air-operated crushing shoe that connects to the Push mechanism 175 may include. As mentioned earlier, the horizontal Length of the bathing wall at its center - - i.e. along the arched edge 29

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of the partially completed container according to Fig. 18 - larger than yours Length along the portions of the fold line that connect the side panels 81 and 84 to the bottom panel when using upwards directed pressure, such as at the ridge point 43 according to Fig. 16, the bottom wall moves upwards; this movement ends as soon as the wall has assumed a convex shape opposite the geometric center of the container Fold-out panels 100 and 101 are then shown in the direction of arrows 176 and 177 in Fig. 19 rotated into the cavity formed by the re-entrant shape of the bottom wall of the container; for this one can look at the movement of the use the same shoe or a special one belonging to the molding machine according to Fig. 16 Using the folding tool «The fold-out fields are then, as shown in Fig. shown, fastened to the outer surfaces of the central base wall with a sliding shoe 179 «Gluing is usually carried out in the gluing step 169 of the Forming machine «The container is then removed from the stripping stage 170 The mandrel is lifted off and transported to a filling machine and filled therein, the upper end being closed by devices not shown will"

For the preparation of erfxndungsgemassen container all plastics which are at room temperature in the solid state are suitable, for _e B ": aliphatic polyolefins such as polyethylene and polypropylene, vinyl polymers and copolymers such as vinyl butyral, vinyl chloride, etc., and acrylic polymers and -Copolymers «

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Claims (1)

1) Container made of plastic material or the like, characterized in that it consists of a molding with a number of folding lines dividing these into different field zones, consisting of a main part, a top closure in combination with an upper edge of the main part and a seamless bottom wall in combination with a Lower edge of the main part, the bottom wall comprising a Mtfcelfeidteil formed in a re-entrant with respect to the main part, which is designed such that a first opposite pair of edges is firmly connected to the lower edge of the main part, a second opposite pair of edges runs transversely to these first edges and a pair Double fold-out fields in simultaneous full edge composite with the lower edge of the main part and with this second edge of the middle field part stand _{v is} produced 2) Container according to claim 1, characterized in that the fold-out fields can be folded along the composite edges in such a way that they are in a straight line with the re-entrant central field part 3) Container according to claim 2, characterized by that the Auffaltfelder to the Midfield part are permanently attached to an end located away from the composite edges. 4) container made of plastic material or the like, characterized in that it consists of a container molding with a series of folding lines dividing these into different field zones consisting of a main part with four parallel Seitenfelderη, each of these side panels ⁵ in full composite with two adjacent side panels along its vertical edges, a crown closure in full connection with the upper edge of the main part and a seamless bottom wall in full connection with the lower edge of the main part, with the bottom wall having a center field, which is re-entrant with respect to the main part, delimited by transverse and longitudinal edges, and a pair of ouples - Unfolded fields in simultaneous full edge connection with the transverse edges of the middle field and with the other side folds of the main part, and the middle field is fully connected with two of these side fields along the long edges and is traversed by a curved fold line, - 18 - 1 0 9 819 / 1A 9 9 which delimits a pair of flat field sections, whereby the length of the sheet fold line is longer than the longitudinal edges, creating the re-entrant shape, will be produced· 5) Container according to claim 4, characterized in that each Auffaltfeld of two folded triangles with a common summit and two different base edges in full association with one of the There is transverse edges of the central field part and one of the side fields of the main section, the fold-out fields being foldable inwards along the base edges so that a bond with the middle section is established. 6) Container according to claim 5, characterized in that the two triangular parts from which all Auffaltfelder consist, along opposite Side edges between the common peak and the base edges are fully connected to each other 7} Container molding made of plastic or the like with a liquid-tight lower edge, characterized in that it is in the form of a flat piece by a A series of fold lines is divided into different foldable field zones, consisting of a number of side fields, each side field being connected stands with two adjacent side panels along second vertical fold lines and thus forms a continuous, liquid-tight side closure, one Number of crown closure panels that are attached to the side panels and one] Number of Bodsnfelder, which extend along a single, continuous, between Upper and lower edges of the molding running horizontal fold line in one Aaschliessen piece to the side panels as their extensions, with at least one outlet edge of each floor panel in full connection with one The outlet edge of another floor field is around the said liquid-C-: to form a dense lower edge of the briquettes " θ) container molding according to claim 7, characterized in that the liquid- tight bottom edge is vertically aligned and is in one plane with at least two opposite vertical fold lines of the side panels, so that opposite · the broadsides of the side, top and bottom fields next to> come to rest » 109819/1 I b 7 y 9 S 7 9) container molding according to claim 7, characterized in that the lower edge is curved with respect to the geometric center of the molding 10) container molding according to claim 7, characterized in that the Put together the mentioned floor fields from three pairs of fields, whereby all pairs consist of two equal planer fields, the parallel, concurrent one Have broad sides and end in full edge composite, so that the liquid- tight lower edge of the briquette is created. 11) container molding according to claim 10, characterized in that the two Fields of two non-adjacent ground field pairs are designed so that they be connected to one another along a first vertical fold line and capture the grid-like base field pairs along second vertical fold lines, wherein the first and second vertical fold lines are both the horizontal fold line and also cut the liquid-tight lower edge of the molding and these fields are symmetrically arranged, diagonal fold lines but having the horizontal fold line and each other at the intersection of the first vertical fold lines and the liquid-tight Cut the lower edge so that triangular fold-out fields are created when the bathing fields are folded inwards along the inclined fold lines « 12) Preform for producing a flat container molding with seamless, liquid-tight lower edge and upper double-cut edges, consisting of pentagonal flat side panels, their parallel, concurrent broad sides, along the two vertical side edges in full edge composite stand together, and a lower sheet edge opposite the cut edges, the first and second vertical side edges being equal Level with the lower edge 13) preform according to claim 12, characterized in that the length of the Lower edge is larger than the distance between the vertical side edges 14) Method of making a container molding from plastic material or the like, a series of fold lines in an upper field zone with an outlet in upper double-cut edges, in a main field zone made up of several, continuously connected side fields and in one seamless, liquid-tight subdivided under the arched edge of the Badenfeldzone, characterized by 109819 / 1A99 "1679367 that he a preform with at least one side wall, an open one End and a closed curved edge opposite the open end, wherein the curved edge is formed, so long the plastic material is in a workable state, (2) cools the preform in order to harden it, (3) the preform in the through the axis of symmetry of the preform and flatten the edge of the sheet specified plane, and (4) by holding in this flattened position, that one holds two vertical Forms fold lines along the side wall in the vertical plane, with fold lines and curved edges intersecting, and (5) notches the outer surfaces of the preform over predetermined zones, so that a number of fold lines run over the molding, which divide it into apex, main and bottom zone zones. 15} Process according to claim 14, characterized in that process steps (3) and (4) are carried out simultaneously. Method for unfolding a ready-to-fill container from a flat one Form with a series of fold lines that divide it into a crown field zone with outlet in tubular double cut edges, into a main field zone from several, continuously connected flat side panels and divided into a floor panel zone from several floor panels with an outlet in a seamless, liquid-tight lower sheet edge, characterized in that one (1) four vertical side walls by pressing the side panels against each other manufactures, (2) by applying pressure at certain points on the edge of the sheet, the bottom field simultaneously upwards against the geometric center of the briquettes moved so that certain bottom panels form at least two fold-out panels and a center panel along the lower edge of the side panels, (3} the fold-out panels around the level of their attachment to the side panels and the midfield rotates until it is in a straight line on dam - 21 - 10 9 8 19/1 L 9 9 Midfield rest, and
(4) the fold-out panels are permanently attached to the center panel. 17] The method according to claim 1S _1, characterized in that in step (2) movement pressure is exerted over a predetermined part of the central field so that this field is guided through the plane of its attachment to the side fields and jumps into the container within the side walls and is formed . 18) Method according to claim 16, characterized in that in the method «· step (1) along predetermined boundaries of at least two vertically aligned fold lines, which extend in one through the sheet edge and the geometric center facing leading plane, pressure is applied For: Chevron Research Company 109819/1499 Blank page