US 3374913 A
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Description (OCR text may contain errors)
2 Sheets-Sheet 1 Filed Oct. 8, 1965 INVENTOR DONALD H ZIPPER w T T A March 26, 1968 D. H. ZIPPER TAMPER-PROOF' PACKAGE 2 Sheets-Sheet 2 Filed Oct. 8, 1965 @UUUOUUUU manna 00mm [1mm] [1 w MGM INVENTOR DONALD H ZIPPER Unite This invention relates to new and useful improvements in tamper-proof packages and more particularly is directed to a simplified form of tamper-proof closure cap and co-operating container finish which may be easily manufactured and expediently assembled.
Tampen'proof caps as such are old in the art. Known types of tamper-proof packages includes a container and a closure with an integral tamper-proof band, seal, or ring which is fractured from the remainder of the closure ca-p when the package or container is opened. Screw-type, tamper-proof type closures have been used extensively in the packaging of alcoholic beverages, drugs, and the like. If the tampersproof band on the closure is to be restrained against rotation to cause fracture, the caps are usually applied to the container and the threads subsequently formed by a known type of manufacturing process. If the threads are formed prior to application, then the tamperproof band must be deformed sub-sequent to application to hold it to the finish to permit breaking when the cap is removed. in either case, cap application is more time consuming, and hence costly.
The present invention deals with an improved type of tamper-proof closure applicable by a press-on motion and having a unique means to facilitate rotational removal. The tamper-proof band is joined to the cap proper through frangible bridging sections and is disposed on the container in such a manner that the band is retained after the cap is removed. Under the action of gravity, the tamper-proof band drops away from the lower portion of the cap thereby to visually indicate that the package or container has been tampered with. In this manner, it may be noticed and retrieved before sale. The tamperproof band of the present invention will be retained on the finish even though the container is inverted to dispense thecontents in normal use.
The present tamper-proof cap design has the advantage of being capable of application by a press-on type motion. Self-forming threads permitting rotational removal of the cap are formed by such press-on motion without additional mechanical processing. Accordingly, very high capping speeds may be maintained since no mechanical thread forming, indexing, or rotary capping motion is required, making manufacture and application of the tamper-proof closure cap design of the present invention economical. It follows that it may be applied to a greater segment of containerized foo-d products without a substantial increase in cost.
Other advantages will become apparent when the objects and a detailed description of representative embodiments of the invention are considered below.
It is an object of this invention to provide a novel tamper-proof closure which is easily applied to the container without rotation, indexing or mechanical type thread forming.
It is a further object of this invention to provide a tamper-proof closure in which the tamper-proof band will be retained on the sealing'finish of the container and will drop down on the container finish once the bridging portions joining it to the closure cap have been fractured.
It is a further object of this invention to provide a novel tamper-proof closure arrangement in which the tamper proof band assists in retaining the closure c ap on the container.
Additional objects and advantages will become ap- States atent parent when description of preferred embodiments of the invention are given in conjunction with the accompanying drawings wherein:
FIG. 1 is an enlarged diametric cross sectional View of a closure cap made in accordance with the principles of the present invention;
FIG. 2 is a fragmentary portion of a container finish adapted to accommodate the cap of FIG. 1;
FIG. 3 is a fragmentary enlarged cross sectional view of a container finish of FIG. 2 with the cap of FIG. 1 being applied by a capping head shown fragmentarily before the curl is rolled into the neck of the container;
FIG. 4 is a view similar to the view of FIG. 3 with the cap in the fully seated position after the curl is rolled into the neck of the container;
FIG. 5 is a view similar to FIG. 4 after the tamperproof ring has been fractured from the closure cap proper;
FIG. 6 is a view similar to FIG. 1 of a cap construction for a similar form of container finish;
FIG. 7 is a fragmentary portion of a similar form of container finish to receive the cap shown in FIG. 6;
FIG. 8 is an enlarged cross sectional view of the finish of FIG. 7 with the cap of FIG. 6 fully seated; and
FIG. 9 is a view similar to FIG. 8 in which the cap is in a stage of removal and the tamper-proof band has dropped.
Referring to FIG. 1, the closure cap shown at 10 includes a top panel portion 11 having a shoulder portion 12 forming one margin of a gasket groove 13 while the outer margin is defined by a depending skirt portion 14. The inner circumferential surface 15 of the skirt 14, as well as the gasket groove 13, is filled with a layer of gasket material 16 for sealing to a container finish and formation of means to facilitate rotational removal of the closure cap. The gasket material may be of the type described in US. Patent No. 2,874,863 and Patent No. 2,841,304, or the equivalent.
The lower margin of the skirt 17 is joined to a tamperproof band 18 through a series of frangible bridging portions 19 at spaced intervals. The lower margin of the tamper-proof ring 18 may be curled as at 20 While the main body of the tamper-proof band 18 is provided with a series of hollow embossments or recesses 21 which extend from adjacent the level of the bridging portions 19 downwardly to the top of the curl 20.
A fragmentary portion of a container is illustrated at 22 in FIG. 2, having a necked-in portion 23 defining the lower extremity of the container sealing finish portion 24. At the upper extremity of the sealing finish portion 24, is an upper rim 25 having a plurality of grooves or recesses 26. Oppositely directed earns 27 and 28 are formed at the ends of the recesses 26 and lead up to the rim 25. The sealing finish may be constructed in accordance with the application of Moloney et al., Ser. No. 490,311, filed Sept. 27, 1965, and issued as US. Patent No. 3,285,452 on Nov. 15, 1966, and reference may be had to that application for additional details of the construction. A smooth frusto-conical portion 29 extends from adjacent the top of the finish down to a cylindrical bandlike portion 30 immediately above the neck 23. A series of solid embossrnents or lugs 31 are formed on the cylindrical portion 39 for co-operation with the hollow embossments or recesses 21 in the tamper-proof band 18.
In FIG. 3 is illustrated an enlarged half sectional view of the closure cap of FIG. 1 as applied to the container finish of FIG. 2, A capping head 32 presses the closure cap 10 onto the rim 25 of the container finish causing the gasket compound 16 to fiow into the grooves 26 to form cam surfaces co-operating with the cam surfaces 27 and 28 on the container finish. The details of this feature are 3 fully described in the copending application mentioned above.
Simultaneously with the completion of the press-on motion applying the closure cap 10, a punch 33 engages the curl 20 to roll it radially inward into the neck 23 to the position shown in FIG. 4. The punch 33 may be continuous or can engage the curl at spaced points around the closure cap depending upon the particular application. In either event, the deformation of the curl 20 radially inward to the position shown in FIG. 4 serves to assist in maintaining the closure cap 10 on the container finish 24.
During the press-on application, the uniformity of the container and container finish 24 and lack of threads or the equivalent permits the application of the closure cap 10 with a purely vertical motion. Since the lugs 31 are close to each other and slightly rounded at their upper extremity, the co-operating recesses will automatically align with the same when the cap is applied. When the closure cap 10 is fully seated as shown in FIG. 4, the gasket compound 16 is reformed to form cam surfaces co-opcrating with the cam surfaces 27 and 28.
When the cap is to be removed, the closure cap 10 is rotated relative to the container 22. The attending axial movement caused by the cam surfaces 27 or 28 of the closure cap 10 with such rotation, causes the bridging sections 19 to fracture, as is shown in dotted lines at 34 and 35, permitting the tamper-proof band 18 to drop doWn on the finish. During removal, the locking action of the lugs 31 in the recesses 21 revents the tamper-proof band 18 from rotating with the cap while the curl being engaged in the neck 23 will preclude upward movement of the band 18. The loose interfit between the band 18 and cylindrical portion 30 of the finish 24 permits the band 18 to fall to the position shown in FIG. by gravitational force.
A closure cap 40 of a type similar to that shown in FIG. 1 is illustrated in longitudinal cross section in FIG. 6. Cap 40 has a center top panel 41 and shoulder 42 which forms the inner margin or periphery of a gasket groove 43. The outer periphery of the gasket groove 43 is formed by a skirt portion 44 which has an inner circumferential surface 45 lined with an elastomeric or plastomeric compound 46. The gasket compound extends from adjacent the bottom margin of the skirt 44 along the inner circumference 45 and inwardly across a portion of the top panel filling the gasket groove 43 and terminating slightly inwardly of the shoulder 42.
A tamper-proof band 47 is provided with a curl 48 at its lower extremity and is joined at its upper margin through spaced bridging portions 49 to the lower peripheral portion of the skirt 44. Any number of bridging portions may be provided, however, it is contemplated that only a sufficient number will be provided to perform the function of holding the cap to the finish when the curl portion 48 is rolled within the neck. An excessive number could conceivably make cap removal difficult. A series of recesses 50 are provided around the inner circumferential surface of the tamper-proof band 47 and may be of any desired shape.
In FIG. 7 is shown a sealing finish 51 on a container 52. The sealing finish has a cylindrical portion 53 provided with a series of knobs or lugs 54 much in the fashion of the container of FIG. 2. Above the cylindrical portion 53 is a sealing portion 55 having thread means 56 at spaced intervals. The thread means 56 is similar to that of FIG. 1, however, is uni-directional rather than bi-directional. Also, the thread means 56 is located downwardly of the top rim 57 on the finish 51. The details of this construction may be found in the copending application to Foster et al., Ser. No. 369,092, filed May 21, 1964. As noted in the description of FIGS. l-S, the gasket material may comprise a plastisol compound of the type described in the application alluded to above or the type described in US. Patent No. 2,874,863, and US. Patent No. 2,841,304.
As seen in FIG. 8, when the cap is applied to the finish 51 with the curl rolled into the neck 58 of the container 52, the gasket compound 46 fills the thread means 56. The gasket compound seals the cap to the container from inwardly of the rim 57 to the lower margin of the skirt 44. The recesses receive the lugs 54 locking the tamper-proof band 47 against rotation relative to the finish. The curl 48 may be rolled into the neck 58 if it is desired to assist in holding the cap 40 to the container finish 51.
Obviously, if the combined holding force of the gasket and vacuum in the container is sufiicient to prevent the cap 40 from becoming loose, the step of rolling of the curl into the neck may be omitted in the above described embodiment as well as that of FIGS. l-S. In such case, the tamper-proof band is only restrained against rotation, so that fracture of the bridging portions occurs as a result of the shear forces. Tensile or downward forces, developed when the curl 48 is rolled into the neck 58, are transmitted to the cap 40 through the bridging portions 49.
When the cap is to be removed from the finish it is simply rotated in the usual counterclockwise direction. This causes the co-operating thread means formed in the gasket 46 to ride up the cam surfaces forming the thread means 56. The attendant relative axial and rotational movement occurring between the tamper-proof band 47 and closure cap causes the frangible bridging portions 49 to fracture. The tamper-proof band may then drop to the position shown in FIG. 9. After fracture from the tamper-proof band 47, the closure cap 40 may then be removed and replaced as desired. As was the case in th embodiment of FIGS. 1-5, the embodiment of FIGS. 6-9 also permits capping at extremely high speeds since it may be applied to the container with a simple press-on type motion. The curl 48 on the tamper-proof band 47 is rolled into the neck 58 of the container 52 to assist in cap retention while also holding the tamper-proof band 47 to the container when the contents of the container are being dispensed.
The simplicity of the tamper-proof cap of the present invention permits it to be readily manufactured. A neat appearance is presented which provides advertising space around the skirt inasmuch as it is free of threads, projections, and ridges which is commonplace in prior art designs.
Upon a consideration of the foregoing, it will become obvious to those skilled in the art that various modifications may be made without departing from the invention embodied herein. Therefore, only such limitations should be imposed as are indicated by the spirit and scope of the appended claims.
1. A tamper-proof package comprising a container havinng a sealing finish, said sealing finish having a plurality of cam surfaces thereon, an outwardly facing smooth circumferential portion disposed below said cam surfaces, a cylindrical portion disposed below said circumferential portion, a plurality of spaced lug means on said cylindrical portion, each of said lug means projecting radially outward from said cylindrical portion, a closure cap received over said sealing finish, said closure cap having a tap panel covering the top of said sealing finish and a depending skirt at the marginal edges of said top panel, said skirt being spaced from said sealing finish and a deformable gasket substantially "filling the space between said skirt and said circumferential portion, said gasket extending into engagement to form a cam surface: for co-operation with said cam surfaces on said finish, a tamper-proof band frangibly joined through spaced bridging portions to a lower portion of said skirt, said tamper-proof band having a series of spaced recesses.
therein with closed upper and lower ends for receivingsaid lug means on said cylindrical portion thereby to prevent rotation of said band, whereby rotation of said closure cap to effect removal from said package will serve to fracture said =bridging portions thereby indicating that said package has been opened, the vertical length of said spaced recesses substantially exceeding the vertical length of said lug means so as to permit said tamperproof band to drop down when it has become separated from said skirt.
2. The tamper-proof package of claim 1 wherein means is provided to retain said tamper-proof band on said container after fracture of said bridging portions.
3. The tamper-proof package of claim '2 wherein said means to retain said tamper-proof band on said container comprises said tamper-proof band *being formed with a curl and at least a portion of said curl being deformed into a neck portion of said container to assist in holding said cap to said finish.
4. A tamper-proof package comprising a container having a sealing finish, a plurality of upwardly facing cam surfaces formed on said finish, a series of radially projecting lug means formed on said package below said sealing finish, a closure cap including a tamper-proof band covering said sealing finish, gasket means filling at least a portion of the space between said cap and said sealing finish and overlying said cam surfaces to form co-operating surfaces to permit rotational removal of said cap after press-on application, a series of radially opening recesses with closed upper and lower ends in said tamper-proof band, said recesses receiving said lug means during press-on application of said cap to said finish and functioning to prevent rotation of said band relative to said finish, and frangible bridging means joining said band to the remainder of said closure cap whereby rotational removal of said cap will cause fracture of said frangible bridging means to separate said tamper-proof band and said remainder of said closure cap, the vertical length of said radial opening recesses substantially exceeding the vertical lentgh of said lug means so as to permit said tamper-proof band to drop down when it has become separated from the remainder of said closure cap.
5. The tamper-proof package of claim 4 wherein a portion of said tamper-proof band includes a curl which is deformed into a neck portion of said container to assist in holding said cap and band thereon, said curl holding said tamper-proof band on said container after removal of said closure cap.
References Cited UNITED STATES PATENTS 1,504,698 8/1924 Merolle 215-39 2,122,294 6/1938 Regan 215-42 2,131,319 9/1938 Greenholtz et al. 215-43 3,158,278 11/1964 Knapp et al. 215-42 3,181,719 5/1965 Schaich 215-46 3,219,223 11/1965 Hadley et al. 215-42 3,235,115 2/1966 Duke 215-42 3,270,904 9/1966 Foster et al 215-43 3,285,452 11/1966 Moloney et a1 215- FOREIGN PATENTS 1,276,285 10/1961 France.
404,951 1/ 1934 Great Britain.
DONALD F. NORTON, Primary Examiner.
JOSEPH R. LECLAIR, Examiner.