DE1900700A1 - Closure cap with molded-in threads and method for producing this closure cap - Google Patents

Description

Dlpl.-Ing. Egon Prince Dr. Gertrud Hauser · οοο Minch · * * o, * “7 tan Dlpl.-Ing. Gottfried Leiser He “, b. _re .r "ra". i »-» · üttil. Patent attorney "

amm .. ipkyrinH. MftKfc «, 1900700

i MOfldM «117» 7 »

Anchor Hocking Glass Corporation Lancaster , Ohio / V.St.A.

Our reference: Α145ί

Closure cap with molded threads and Process for the production of this Versohlußkappe,

The invention relates to a threaded one Closure cap and a method for listening to this closure cap and a container embodiment, which cooperates with this closure cap. The invention, preferred closure cap has a housing protected against abuse and an insert or -lining made of a plastic-like material on the üuppenrand, this material being the one against the container abutting and engaging in the container threads, which in the liner during manufacture outer cap are molded. Part of the cap shell clothing under the cap threads rests against a corresponding surface on the finished container to provide a barrier against to prevent insect penetration under the hand of the cap. In the preferred production method of the Cap is made of a curable or flowable plastic like material poured into the cap housing or inserted into the cap housing in the form of a lung. After this the material is hardened or melted so that it »I am in a dimensionally stable state, the K .-. '.. ", penßowincle molded in the plastic material.

/ yy the

The invention relates generally to threaded closure caps and to container embodiments cooperating therewith to provide an improved sealed To provide closure and an improved sealed package and the invention further relates to a Method of making the cap. In particular, the invention relates to an improved threaded cap that has a metal housing and a method for forming or forming the cap threads and a with this cap cooperating container embodiment.

The closure cap according to the invention is a threaded cap which can be twisted off, with this cap at the same time an effective top fastener and a side fastener is created at the bottom of the rim, wherein this closure acts as an insect barrier. The cap and container shape can be made on loan and the caps can be in existing filler or Paokmasohinen be applied, this was achieved that the caps have a metal housing and that a plastic or plastic-like molded liner is provided on the cap rim and on the adjacent portion of the cap lid is. The cap threads are molded into the liner or insert of the cap rim. The lining or Liner has an annular surface below the cap threads, this surface against one with this cooperating surface rests against the container, creating a side seal and an insect barrier is formed. The improved manufacturing process of the cap, as will be described in detail later, has a number of stages, which are such that they easily in an automatic cap making line of sight can be carried out using a malleable lining inserted into the cap ^ ossexi or inserted

909831/0261

will

Γ f:

and then the cap threads are formed or formed in the liner or insert material.

It is accordingly an object of the invention to provide an improved closure cap and container embodiment to accomplish.

Another aim of the invention is to provide an improved, to create a threaded cap protected against abuse or incorrect use.

Another object of the invention is to provide an improved threaded closure cap to provide an anti-insect barrier, the cap removal torque is adjustable.

Another object of the invention is to provide an improved sealed package which is twistable Has closure, this packaging having a high resistance to penetration by insects.

Further objects and features of the invention are intended in the following description with reference to the figures the Zeiohnung are explained, with a preferred embodiment was selected to illustrate and describe the invention. ] £ s show:

Fig. 1 is a sectional view of a preferred embodiment of the closure cap and the corresponding Container formation prior to attaching the cap to the container,

2 is an enlarged partial sectional view of a preferred one Ausihrungsform the closure cap before their attachment to the container,

909831/0261

Pig. 3 is a view of the cap shown in FIG. 2 attached to the container shown in FIG is,

Pig, Figure 4 is a perspective view of a preferred embodiment the closure cap, which is partially cut.

Figures 5-8 are schematic representations of the preferred methods of making the cap

^and ■

Figure 9 is a vertical sectional view of the finished cap.

In Fig. 1 is a preferred embodiment of the closure cap and illustrated a container embodiment in accordance with the invention. The cap 1 has a metal housing 2, this having a lid portion 3 and a hand 4 extending downward. The edge 4 is preferably graded and has a shape that protects against misuse. The lower section has a smooth edge which is formed in that, for example, the lower edge 5 is rolled over inside or is flanged.

As FIG. 2 shows, the metallic cap housing 2 an inner lacquer coating 2a to protect the exposed parts of the metal and to protect the bond between the housing 2 and a lining 6 to improve. The varnish can be one of the usual cap varnishes, or it may be an organosol of the type described in U.S. Patent 3,005,433. the The insert or lining 6 consists of a plastic material Plastic material and this liner covers a substantial part of the rim of the cap and extends into a liner bulge 7, which thereby

au SGEB ildet

909831/0261

is designed that part of the cap wall 8 in the cover 3 is pressed down. The liner 6 has an annular closure or sealing section 9 in the vicinity of the edge between the edge 4 and the cover 3, this annular closure extending partially over the annular bulge 7. Threads IO engaging in the container are formed in the plastic-like lining 6 during the manufacture of the cap 1, to be precise by an improved method which is to be described below.

In the preferred embodiment, the edge 4 of the cap has, as shown, a step 11 in the upper portion of the cap rim and an outwardly tapered central portion 12, which in a generally zyliiidriseilen lower section 14 above the Bead 5 passes. This combination of the stepped portion 11 of the tape 4, which is very close to the finished Glass shape fol ^ t, and the conical section 12 leads to a cap which is very well protected against improper use of the cap, this cap allows a very good closure and a very good seal and with this cap ic no loss of vacuum during the handling of such packaging.

The vertical section 15 of the step 11 is preferably also designed to taper downwards, whereby this section forms an angle of about ü ° with the vertical, for example, and the lower section i (5 of the step relative to the horizontal by one in general inclined downward at a similar angle. The section of the cap that widens conically outward is wiriiisaij about the cap's resistance to abuse Increase reuse and assign one

908831/0261 _T1 , _lkel

ORIGINAL

Angle of 15-20 °, with a preferred embodiment having an angle of about 17. The relationships shown in FIGS. 2 and 3 are taken from a drawing of a preferred, commercially available embodiment of a cap.

As FIG. 3 shows, the molded threads 10 engage corresponding glass threads or projections 17 on the container. The cap threads OK preferably widen ™ down slightly to attach the clasp to simplify the container thread 17. This broadening may be of the order of a few degrees, for example in the range of about 3-6.

The lower portion of the liner 6 below the threads has an inwardly facing, generally cylindrical surface 18 which cooperates with an outwardly facing, annular surface 19 of the container 20 to form an insect barrier. The surface 19 is preferably located on the edge of a projecting annular glass rim 21 which is arranged k below the threads 17 of the container. The upper section of the container err arides has a .J ± gungsoberflache 22, which lies against the iiicirfcuxigaabschnitt 9 of the lining υ.

TüTie Fig.3 shows, forms the combination of the improved Closure cap with a cooperating with this Container training a tightly closed and tightly sealed package, with a seal or barrier ai; i lower section of the container closure, below the ! Edge 21 is provided. This seal or barrier protects against contamination and against intrusion

909831/0261

BATH ORIGINAL

of insects between the container and the cap liner and can be used to re-wrap the packaging to close, namely that the cap is twisted or screwed on the container ergev / inde.

As described in the introductory part, the preferred embodiment of the cap 1, the threads engaging in the container in the plastic-like material which the Cap liner 6 forms. A variety of elastomerera or plastomeric material can be used for the lining are and preferably these materials are selected so that they are in a ring-like shape in the Ecice inserted between the cap lid 3 and the cap rim 4 can be and such that this ring of material can then be shaped in the closure cap, so this ring assumes the liner shape described above, although this liner shape is a container top and -seiteuabdichtungsoberiliiclie and also a side seal near the ojoriiite of the Bottle as well as formed threads 10, which in the container intervention.

A preferred way of creating the ring consists in pouring the material into the cap housing 2. iSin preferred material that works for. this method very e, nt is a plastisol paste is _f which can be inserted into the Ecice the cap as a paste at room temperature, this paste can then be cured under heat and shaped into the form geArünschte.

i) ± o plastisol lining materials, which are described in USA-Pivfcentschrift 3 005 433, can be used with

or

909831/0261

or without a filler in the one described in this patent Way to be used. These plastisols include polyvinyl chloride synthetic resins with plasticizing agents, such as dioctyl phthalate, these materials are mixed together in paste form and are flowable at room temperature, so that these materials can be poured into the cap housing like a ring, • before the subsequent melting and molding processing ^ gUnge to be carried out. Other plastisol compositions can also be used.

For the coating of the inside of the cap can preferably a common primer and adhesive coating can be used, and it can be a commercial paint or an organosol ^ eschiolitung act, this coating being applied to a plate before it is in the shape of the housing 2 is pulled or brought.

About setting the opening and closing torques to facilitate the cap, a proportion of the torque) teneinstellmittel are uniformly distributed in the plastic material. A lubricant soft for this one Suitable for this purpose may include an acid amide, as described in US Pat. No. 3,142,401. It Other known lubricants such as silicones can be used in such amounts to achieve the desired To achieve torques when unscrewing. These lubricants can also be applied directly to the surface of the finished cap liner applied v / earth, for example by applying a silicone coating the surface of the finished lining is sprayed on.

Ϊ3θ i

909831/0261 -

At de ei im. procedure described above, in the case of eggs: Eggs of plastic in the cap housing in i'Orra one before to the incised ring is used, ka;: * n the Juateriai to polyvinyl chloride or another plastic-like material bag the material used in Äingforin and then we shaped ti to form the cap threads, where combined print and braid are attached, These other materials cool all of the main ingredients natural oiler syrithetiseue gums and polyethylene ouer other plastics that are known to be Satisfactory and which are formed with a corresponding iia-stability can.

A preferred method for equipping the cap with shaped threads, with the lining being poured in, is shown in FIGS. As stated above, a preferred material for the cast-in lining is G exae Kunstwtof! 'Paste, such as a plastisol, which is poured into the flap housing and, as a result, is thermoset by heating. The iu-etailk & jjpenhousing is produced by the usual Ar'fjoits ^ üa;.; e in üer './eise that first a fi - " cap-shaped u-chause 'Δ is pulled. After that, tools were used to manufacture Hin '.leu nr.cii inside aiajeuördolten ittmu ο on the free edge nor cap.

^ ¹ If, .ΰ zei, "; t uie Veridiiußicap ^ e 2, into which a .plastisol of the beö (ihiie5) eneu type as ιύχη; ί 6a is poured, this li o / .iieu. · Lining machine by means of a ^ üse 24 takes place. i> er iüuistytoi'i "is preferably poured into the corner of the s 2, namely ucrart that

909 83 1/0261

the

the plastic extends on the inside of the cap rim 4 by a substantial distance nacii above and in such a way that this plastic at least partially fills the iting groove 7.

In order to facilitate the handling of the cap housing 2 after the lining ΰ has been poured in, the housing is preferably subjected to a quick pre-emitting process. The plastisol is heated, and only a slight or thin melt on the plastisol is replaced in order to maintain the shape of the plastisol and to easily bind the plastisol to the cap housing 2, heating under infrared lamps for the divuer of about 20 Se;:.: Ndden in an ambient temperature of about 94 ° C produces a satisfactory overmelt. TeO ₁ -'eratureii can be used to generate an entoprecond, partial cooling, especially the handling of the housing 2, without the sealing material 6 being disturbed or adversely affected.

fc The ivappengeliiiuse 2 is now a further / liri.ie treatment in an appropriate tunnel or in egg cells Oven subjected to wei ^ orhiu dus plastisol ^ u to smack. Melting has been found to be beneficial to be carried out completely during this stage so that the housing has sufficient time to ground should, ma the plastisol melt completely, Jies can for example be done in a way that the housing in an oven with a temperature of about 20υ ° G for heated for a period of about 6 minutes = .; ircl or as long, until the plastisol is completely oycJiriolzen.

909831/0261. ~~

BATH

After the Schnielz process has been carried out, the cap threads IO are formed in the lining material 6 in the region of the cap edge 4 in that the closure cap is placed in a holder 2G which is located under a thread forming die 27. The plunger 27 is preferably cold and is, for example, at room temperature, while the plastisol is kept at a temperature of about 205 ° C. when the plunger is pressed into the plastisol in the Vfeise, as shown in FIG under sufficient pressure to form the cap threads 10, this combination of cold V / ex dies and a molten plastisol held near its melting temperature results in the formation of precisely possessed and fully formed gaps. The punch or the mold 27 is preferably shaped, as shown, in order to form the plastic in an iting zone between the inner edge of the groove 7 and the umb "rdelun _ö 5 of the cap round 4. The punch 27 remains in contact with the plastisol for a sufficient time for the threads 10 to fully form, the punch 27 is then removed from the cap i by relative rotation to unscrew the cap from the thread punch, or by stripping if there is any Allow constituents.

A preferred method of luxury has been described in the foregoing, but the thread dimension stability is of utmost importance, a satisfactory cap can be produced by using an ex-heated stone pel 27 vex'veuuot, "ira, so that at least the Wurmeaushiix-tung during represents ^ i: si'oriuung ex'folgt.

909831/0261

It *

Γ, it

- 12 -

7 shows a second exemplary embodiment of the method for producing the shaped liner 6 including the threads 10. In this embodiment, a precut ring 28 is inserted into the closure cap 2. As stated, the ring 28 can consist of polyvinyl chloride, or it can be another formable sealing material which can be cut to the rear of a predetermined volume and which can then be molded in the housing 2. After the ring 28 is inserted into the housing, the ring is formed using a forming die 27, the process roughly corresponding to that shown in FIG. If the plastic is in the form of a ring and has already hardened, it is preferably shaped by means of cold molds or punches, the ring 28 and the housing 2 being heated. If the ring 28 is made of a polyvinyl chloride, this ring can be formed using a heated die 27, this tool being heated to, for example, about 180.degree. C. to about 205.degree.

The sings 28 are cut out with precise dimensions and then an exact volume of the plastic material is inserted into the cap housing «The exact volume iifrmbgiioht fine fieatige adjustment of the formal processes . The continuous production of identical seals by means of the tools 27 is facilitated.

«I ν ■ - ' - ■'■■■■■■"' j In Fig * $ lit the finished union lock 1 is shown, the lock being a hit with a threaded ring

'' 'tifce Diohtungaauskl # lduni β and where this ver « söhluö can be brewed on packaging of the type described above

· '"' '■ · Oils

"■ '; 900831/0261 - - [

INSPECTED

V. .k * ■

- 13 -

The preferred embodiment described in the foregoing is a form The cap has continuous threads and it is understood that other thread shapes can be used as well. and that in particular shorter threads of a known type, such as, for example, interrupted threads in the cap rim can be formed which cooperate with corresponding threads or projections on the container or on the bottle.

It can be seen that there is provided an improved threaded cap having threads formed in the cap exterior. clothing are trained. The cap can be unscrewed from a package by the user and can be used by the packaging personnel can easily be screwed on so that vorbestimiüte Unscrewing torques can be set. Daduroh a cap is created that has a sufficiently large unscrewing torque has to remain screwed on tightly during storage and shipping, but set a sufficiently low unscrewing torque so that the cap can be easily removed from the sewer can be unscrewed.

i) The cap lining also has a subdivision, the eixiü lock with a corresponding device on the container forms in the area of the lower edge of the cap rim, this barrier being effective against the ingress of insects is. In this way, a sealed and sealed packaging is produced, which is especially useful for life Lei including baby foods and other products is suitable.

Et; changes and changes can be made, which are within the scope of the invention.

Patentau qa · ii oä e 909831/0261 ~~

- ■ ■ ■! - ·. ■.

Claims (1)

■ tj j J -14-. Claims 1. Closure cap for sealing or closing an Behälters- in düroh a housing a öeoke Ivan manure and θ inen downwardly extending edge having a lining of a plastic-like material, welohes at least a portion of the edge covering, said lining an N- ^ which smooth annular portion near the free end of the cap brim to form a barrier when the cap is applied to a corresponding surface on a container and with threads provided in the land portion of the liner above the smooth annular portion; 2. Closure cap according to claim 1, characterized in that the plastic-like material comprises a plastisol. 3. Closure cap according to claim 1 or 2, characterized by, that the threads widen downwards and outwards. 4. threaded cap naoh one of the preceding claims, characterized characterized in that the sealing portion forms a second smooth, annular portion of the liner and that the threads are arranged between these annular portions of the liner. 5. Closure cap according to one of the preceding claims, characterized by the fact that eggs lie downwards Has widening portion, a stepped portion in the edge between the outer edge of the cap top wall and the widening portion is arranged. 909831/0261 rl- tt t r ι r f t r . γ r * <r rrfrrrr tr 190070Q 15 - VorsohluDkappe naoh one of the preceding claims, characterized in _t that the band has a conically widening bottom NaOH Abeohnitt and a generally cylindrical lower portion which in a rolled NaOH inner band ends " Closing cap near a dor vori'tr «; e \ n h <^;<n »tit. ¹ ; -! he, thereby gekp izelcini ■>. ι »ϊ _■■■: <r ^ iiauu .inn -.:■ {■■■ -> λ · u; 'their accounts ^! iMü. : ■ tMsf '·: {<< ·· ι ; ; .η! iiil.n'i si oh vo. '^; !.. ■ "'.... .- ^ ia I) · tit · ^■: ■': j hai h u'vr i: ίί'ί this iiitir <v.olmi ullcmeinoii _in:; nkrechiti Waiiuung shows that the whole j: - '"is vaulted on the outside, and a Uodeuuhschnitt, de,, .- is inclined closer to the bottom than the conical !; cut of the step" '<. Sealed uder jfebgediohtete packaging, marked -h a VersohluBlimt> pe _# which has a housing bit of a Dekvu luuu uui 'and with an A ^ M "k tonten" loh strek-T, hatid, with a lining iltUi eitivil plastic ~ iftusn kfUurial at least part of the band at! an! .t, this lining being smooth, ring-shaped U.iüij: i it in the vicinity of the free edge of the cap rim β im. "■, -, < int, whereby threads are provided in the band part of the lining obrT i.ilb of the smooth, ring-shaped part τακ! Tobei the container has facilities, which engage the threads of the cap liner and an annular surface is provided below these means to form a barrier with the annular portion of the cap liner. Θ. Sealed packaging according to claim 8, characterized in that that the plastic-like material is a Plaitieol t. '?, O 9 ^y 3 1 »j ?. 10. Packaging according to claim 8 or 9, characterized in that that the inner surface of the Yersehlußgehäuses a coating has, which has a ßrundschicht and an adhesive layer, which has an organosol » 11. Sealed packaging according to one of claims S, 9 or 10 »characterized in that the hand has a step in the upper section, and below the step a downwardly conically widening section, the step having a generally vertical wall, and a step floor sloping downward less than the tapered portion of the belt. 12 · Method for producing a closure cap, characterized in that. a dimensionally stable cattle from a measured amount of a molten and forabar plastic-like material »is put into a metal housing, which has a cover and a sand, after which the plastic-like material is formed into a * Seehring on the inside of the cap rim, in this sealing ring Thread are formed. 13 · The method according to claim 12 »characterized in that the plastic-like material is filled into the ßehätt · « and that the fabric-like material is completely heat-cured before shaping » 14 * Method according to claim 12, characterized in that the plastic-like material is inserted in the form of a cut-to-size binge » 15 * Method according to claim 12.IS or 14, characterized by gpkennzeich- * - net, dftS «in lubricant in plastic-like material . EU is set on the setting of the torques sam 809831 / 02S1 · Close - i7 - To facilitate closing and opening of the cap. 1ϋ. Method according to claim 12 or 13, characterized in that that the plastic-like material is a plastisol, 17. The method according to claim 12 or 13, characterized in that that the shaping takes place by means of a relatively cold stamp or Yferkzeuges. 909831/0261