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Publication numberUS3812994 A
Publication typeGrant
Publication dateMay 28, 1974
Filing dateMay 18, 1972
Priority dateJan 5, 1972
Publication numberUS 3812994 A, US 3812994A, US-A-3812994, US3812994 A, US3812994A
InventorsFeldman J
Original AssigneeDairy Cap Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tamper-proof closure cap
US 3812994 A
Abstract
A closure cap for the neck of a bottle or other container, includes a cap body having internal thread means designed to engage external threads on the neck, and a ratchet ring connected to the body by means of a shoulder. A continuous tear line formed at the junction of the body and the shoulder is provided for separating the body and ring, the shoulder and ring being adapted to pivot on the tear line which serves as a hinge to allow the ring to pivot slightly away from the bottle neck while seating the closure on said neck.
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Description  (OCR text may contain errors)

United States Patent 1 Feldman May 28, 1974 [5 TAMPER-PROOF CLOSURE CAP 2,172,159 9 1939 Conner 215 42 3,352,448 ll/l967 Livingston 2l5/4l UX [75] lnvemor- Jerome Feldmam Great Neck 3,441,161 4/1969 Van Baarn 215/40 3,650,428 3 1972 Miller 215/42 [73] Assignee: Dairy Cap Corporation, Jamaica,

N Y Primary Examiner-Donald F. Norton A Filed: y 1972 ttorney, Agent, or Fzrm Pennie & Edmonds [2]] Appl. No.: 254,393 [57] ABSTRACT Related US. Application Data A closure cap for the neck of a bottle or other con- [63] Continuation-impart of Ser, No. 215,562, Jan. 5, tamer, includes a p y having internal thread 1972, aban n means des1gned to engage external threads on the Q neck, and a ratchet ring connected to the body by [52] US. Cl. .Q 215/256 means of a sh d r. A ntinu us tear line formed at [51] Int. Cl 865d 41/34 the junction f t dy nd t sh uld r is pr id d [58] Field of Search 215/42, 46 A for separating the y and g, the shoulder and g being adapted to pivot on the tear line which serves as [56] References Cited a hinge to allow the ring to pivot slightly away from UNITED STATES PATENTS the bottle neck while seating the closure on said neck. 2,162,712 6/1939 Hamberger 215/42 11 Claims, 5 Drawing Figures Lei TAMPER-PROOF CLOSURE CAP This application is a continuation-impart of application Ser. No. 215,562 filed Jan. 5, 1972, now abandoned.

BACKGROUND OF THE INVENTION With the so-called tamper-proof caps there is ever present the problem of properly seating the cap on the container due to the presence of such encumbrances as beads, ratchet teeth, etc., which serve to prevent tampering as by altering its construction prior to its removal by the intended user. Tamper-proof container caps as shown, for example, in Crisci, U. S. Pat. No. 3,504,818, employ a separable ring member having ratchet teeth to prevent such tampering. A discontinuous connection between the cap and the ring is provided by frangible elements located at discrete points about the cap. With this type of connection,,an opening is present between the cap and ring permitting collection of dirt or other particulate matter.

With the prior art type of cap, flexing of the portions of the ring between the frangible connections is relied,

upon for permitting assembly of the-cap onto the container. Further, with prior art types of bottle caps employing spaced frangible elements for connecting the toothed ring to the body of the cap, turning of the cap in a loosening direction will cause breaking of the frangible elements. This is the result desired if one is purposely attempting to remove the cap. However, this type of construction is disadvantageous if the cap is accidently or inadvertently turned ina loosening direction.

SUMMARY OF THE INVENTION The present invention relates to container closures and more particularly to a closure for a bottle and the like having components the removal of which in the normal manner provides visual evidence of tampering.

In the construction of applicants closure cap, ratchet teeth are employed to prevent tampering, the teeth being formed on the inner surface of a tamper-proof ring which is joined to the cap proper by a shoulder in which is formed a tear line along which the ring is sevcred from the cap prior to opening the container by the user. The tear line is substantially continuous and uninterrupted which provides some protection against particulate contaminants in the vicinity of the container opening.

The tear line in the'cap of the present invention also serves as a flex line to permit the ring to yield pivotably to some extent without rupturing which serves to facilitate the desired engagement of the ratchet teeth on the ring and bottle neck as the cap is initially seated in place. With applicants invention, the cap cannot inadvertently be turned in a loosening direction. A separately operable rip cord must first be pulled to release the tamper-proof ring section of the cap. Only then can the cap be turned in a loosening direction and removed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is an action perspective view of the cap in position on a bottle and showing the rip cord in the process of removing the tamper-proofing;

FIG. 2 is an enlarged vertical cross section ofthe cap and bottle of FIG. I and taken on line 22 of FIG. I;

FIG. 3 is a horizontal cross section on a smaller scale showing'the cap in seated engagement with the bottle neck taken on line 33 of FIG. 2;

FIG. 4 is a detail section of a portion of FIG; 2 showing the respective ratchet teeth riding over each other during installation of the cap on the bottle; and

FIG. 5 is a magnified view of a portion of FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, the cap structure basically comprises a body portion with internal threads 12 and a tamper-proof ring 14 having plurality of internal ratchet teeth 16.

The threads 12 are adapted to engage external threads 18 on the neck portion 20 of bottle 22. The bottle provides ratchet teeth 24 designed to engage the teeth 16 of the ring 14 in such a manner as to prevent the entire cap structure from being screwed off the bottle neck as one member.

Removal of the cap ring serves to afford visual evidence that the bottle may have been opened. To that end, the ring is severably connected to the cap portion by means of pivotal shoulder 26. At the junction of the shoulder and cap body 10 is located tear or flex line 28 which is V-shaped. The tear line has sufflcient strength to prevent the two portions of the cap structure from severing when normal pressure is applied to threadably remove the cap. A rip cord extension 30 is connected to the ring 14 with a finger grip 38 having a heart shaped cutout 39 formed therein. The grip 38 being breakably connected by tab 40 to the ring 14 at a point where it has a thin split 17 and is used to tear away the shoulder and ring from the rest of the cap structure on the tear line 28 as shown in FIG. 1, whereupon the ring is discarded. When this is done, turning the cap in the counterclockwise direction permits its removal.

In the presently preferred embodiment of the invention shown in the drawings, the cap is made of flexible plastic material such as polyethylene having a density of about 0.940 gm/cm. The depending walls of the body 10 and ring 14 have a thickness of between about 0.04 and 0.05 inch. The flex line 28 connecting the ring to the body has a thickness of between about 0.001 and 001. inch. This flex line is defined by a weakened, tearable membrane extending continuously around the cap at a location just outside the outer periphery of the body 10. The location of the flex line is most clearly shown in FIG. 5. Its location is such that if the closure cap is viewed from above, the membrane appears as a zone of small width immediately adjacent the depending wall of the body section 10 of the cap.

With the above construction, the ring 14 can pivot outwardly about the flex line 28 as the cap is turned onto the bottle andthe teeth 16 slid over the teeth 24 without damaging the cap or tearing the membrane which forms the flex line. Also, with the present construction the continuous nature of the membrane pro- 'vides enough strength so that the cap cannot be rotated in a loosening direction without first disconnecting the ring. In other words, inadvertent turning of the cap before the ring 14 is removed will not automatically sever the body from the ring.

As shown in FIG. 4, the bottle cap in being seated on the neck of the bottle causing the shoulder 26 to pivot upwardly and outwardly so that the ratchet teeth are in position to engage when the cap is seated. The teeth will permit such engagement with extremely little piv otal motion and without undue flexing of the cap structure as is required in known structures.

There is provided within the body portion of the cap a seal ring 32 which is downwardly tapered, as shown at T in FIG. 2, to increase the gripping action for sealing purposes between the bottle neck and the seal ring. A seal bead 42 is annularly disposed within the cap 10 between the outer wall and the seal ring 32. A groove 44 is formed in the top of the bottle neck 20 by means of the bead 42 on capping the bottle in the event that the materialv of the bead is harder than that from which the bottle is fabricated. The seal ring 32 is provided with radial support ribs 34 to minimize distortion of the ring which might otherwise impair its sealing function.

I claim:

l. A closure cap for a container comprising:

a. a cap body having internal threads adapted to cooperate with corresponding threads on the container;

b. a tamper-proof ring severably connected to the body and having internal projections adapted to cooperate with external projections on the container for preventing unthreading motion of the ring on the container, said ring having a shoulder extending radially outwardly from the lower end of the body and a wall depending downwardly from the outer periphery of the shoulder; and

c. connecting membrane means connecting the ring to the body, said membrane means extending continuously around said body and being located immediately radially outwardly of the periphery of said body, said membrane further being of reduced thickness relative to the thickness of said body and ring to provide a flex line about which said ring can flex outwardly relative to said body, without tearing the membrane, upon threading of the cap onto the container and movement of the projections of the ring over the projections on the container,and said membrane being defined solely by a groove formed in the underneath surface of the shoulder and in the radially aligned portion of the body so' as to be hiddenfrom view when the closure is o the container.

2. A closure cap as defined in claim '1 wherein:

a. there is provided within said cap body a sealing ring adapted to engage an inner surface of the container opening; and

b. radially oriented support ribs for said seal ring.

3. A closure cap as'defined in claim 2 wherein:

a. there is disposed an annular bead within the cap body between the outer wall thereof and the sealing ring, whereby there is provided additional seal on seating the cap on said container.

4. A closure cap for a container comprising:

a. a cap body having internal threads adapted to cooperate with corresponding threads on the container for preventing unthreading motion of the ring on the container;

c. connecting membrane means connecting the ring to the cap body, said membrane having a strength preventing severance of the ring from the body upon turning of the cap in an unthreading direction, said membrane further defining a weakened. tearable flexing zone permitting flexing of said ring relative to said body and about said zone upon threading of the cap onto the container and movement of the projections of the ring over the projections on the container; and

d. grasping means connected to said ring for tearing it from said body along said zone.

5. A closure cap as defined in claim 4 whereini a. said connecting membrane means extends continuously around the cap body and is of reduced thickness relative to the thickness of said body and ring.

6. A closure cap as defined in claim 5 wherein:

a. said ring includes a shoulder extendingv radially outwardly from the lower end of said body and a wall extending downwardly from the outer periphery of the shoulder; and

b. said membrane means is located immediately radially outwardly of said body.

7..A closure cap as defined in claim 6 wherein:

a. the body, ring and membrane means is an integral molded construction of flexible plastic material; b. the thickness of said body and ring is between about 0.04 and 0.05 inch; and

c. the thickness of the membrane means is between about 0.001 and 0.010 inch.

8. A closure cap as defined in claim 7 wherein:

a. said plastic material is polyethylene having a density of about 0.940 gm/cc.

9. A closure arrangement for a container comprising: i

a. a cap body having internal threads;

b. a tamper-proof ring severably connected thereto and having internal ratchet teeth;

c. a pivotal shoulder between the cap body and the ring; and

d. a tear line located at the junction of said shoulder and said body and formed by a continuous and relatively thin protective membrane along which said shoulder together with said ring is adapted to be severed from said cap body prior to the normal uncapping of said container and additionally serving 'as a line of flexure for seating said closure on said container, said shoulder being adapted to pivot slightly on said line as the closure is initially seated on the container, and said protective membrane having sufficient strength to prevent severance of the ring from the body upon attempted turning of the closure in an unthreading direction.

10. A closure arrangement as defined in claim 9 wherein:

a. said, shoulder extends radially outwardly from the lower end of the body with the ring extending downwardly from the outer periphery of the shoulder; and

b. said membrane is defined solely. by a groove formed in the underneath surface of the shoulder and in the radially aligned portion of the body so as to be hidden from view when the closure is on the container.

ll. A closure arrangement as defined in claim 10 wherein: l

a. the wall thickness of the body, shoulder and ring is about equal.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2162712 *Jul 9, 1936Jun 20, 1939John HambergerContainer and closure therefor
US2172159 *Jul 30, 1934Sep 5, 1939Colt S Mfg CoContainer closure means
US3352448 *Nov 15, 1965Nov 14, 1967Livingstone Jay GResilient closure
US3441161 *Mar 9, 1967Apr 29, 1969Baarn Paul S VanBottle cap
US3650428 *Apr 9, 1970Mar 21, 1972V C A CorpTamperproof closure device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3913771 *Jun 1, 1973Oct 21, 1975Anchor Hocking CorpClosure cap with tamper indicator
US3980195 *Nov 18, 1974Sep 14, 1976Owens-Illinois, Inc.Tamper-proof closure
US4131212 *Mar 28, 1977Dec 26, 1978Airfix Industries LimitedContainers
US4261478 *Oct 10, 1979Apr 14, 1981Ruke CorporationTamper-proof closure cap
US4534480 *Jun 1, 1984Aug 13, 1985Sun Coast Plastics, Inc.Tamper evident closure
US4658977 *Oct 21, 1985Apr 21, 1987(Nepco) Northern Eng. & Plastics Corp.Snap on twist off tamper-proof closure for containers
US4667839 *Sep 3, 1985May 26, 1987Northern Engineering And Plastics Corp.Snap on tamper indicating closure for containers
US4722447 *Nov 20, 1986Feb 2, 1988Northern Engineering And Plastics Corp.Closure assembly with two tamper indicators
US4784296 *Aug 6, 1987Nov 15, 1988Cap Snap Co.Cap for keg dispenser
US4848615 *Apr 7, 1988Jul 18, 1989The West CompanyTamper-evident snap type container closure assembly
US4854472 *Jun 10, 1988Aug 8, 1989Plastic Technologies, Inc.Tamper resistant wide mouth package with dynamic seal
US4878595 *Jun 9, 1988Nov 7, 1989Plastic Technologies, Inc.Tamper resistant wide mouth package with labyrinth seal
US4934546 *Jan 30, 1989Jun 19, 1990Cap Snap Co.Tamper evident cap having lift tab on bottom edge
US4951830 *Apr 10, 1989Aug 28, 1990Cochrane Benjamin ASnap-on closure with corking skirt
US5111947 *Dec 4, 1990May 12, 1992Patterson Michael CTamper proof cap and container
US5209795 *Aug 9, 1991May 11, 1993Teledyne Industries, Inc.Method of forming a seal removal tab on a collapsible tube
US5238135 *Mar 18, 1992Aug 24, 1993Landis Plastics, Inc.Easy-open tear strip lid
US5292019 *Apr 10, 1992Mar 8, 1994L. RingTamper evident cap and container
US5294015 *May 22, 1992Mar 15, 1994Landis Plastics, Inc.Easy-open lid
US5862953 *Jul 24, 1996Jan 26, 1999International Plastics And Equipment CorporationTamper evident push-pull closure with pour spout
US6073809 *Nov 15, 1996Jun 13, 2000International Plastics And Equipment CorporationSnap-on tamper evident closure with push-pull pour spout
US7228979Jun 16, 2004Jun 12, 2007International Plastics And Equipment Corp.Snap-on screw-off closure with retaining member for tamper-indicating band
US7837052 *Nov 7, 2006Nov 23, 2010Ropak CorporationPull tab on tear strip on plastic cover plastic cover, including break tab feature, and related apparatus and methods
US8210375Apr 4, 2008Jul 3, 2012Rev 8 Inc.Pour cap for fluid containers having gasket configured to form fluid flow passage and low pressure seals in open position and high pressure seal in closed position
US8584877Nov 15, 2010Nov 19, 2013Rev 8 Inc.Pour cap for fluid containers having open or closed position communication structure with sound and visual features
US20120067459 *Jun 2, 2010Mar 22, 2012Jms Co., Ltd.Cap and nutritional supplement container using the same
USRE33764 *Jun 19, 1989Dec 10, 1991 Press-on cap and seal
DE2543812A1 *Oct 1, 1975May 26, 1976Owens Illinois IncDeckel, der gegen oeffnen durch schlag oder stoss gesichert ist
DE2931063A1 *Jul 27, 1979Feb 14, 1980American Flange & MfgAufbrechbarer behaelterverschluss und verfahren zu seiner anwendung
WO1992010407A1 *Dec 3, 1991Jun 5, 1992Closure Tech CorpTamper proof cap and container
WO2010134908A1 *May 19, 2009Nov 25, 2010Heiberger Robert APour cap for fluid containers
Classifications
U.S. Classification215/256
International ClassificationB65D41/04, B65D41/34
Cooperative ClassificationB65D41/0421, B65D2101/0038, B65D41/3404
European ClassificationB65D41/34A, B65D41/04B1A
Legal Events
DateCodeEventDescription
Sep 23, 1982AS06Security interest
Owner name: FIDELITY COMMERCIAL FINANCE CORP. 765 BROAD ST., N
Effective date: 19820729
Owner name: ITNOC DAIRY CAP CO., INC.,
Sep 23, 1982ASAssignment
Owner name: FIDELITY COMMERCIAL FINANCE CORP. 765 BROAD ST., N
Free format text: SECURITY INTEREST;ASSIGNOR:ITNOC DAIRY CAP CO., INC.,;REEL/FRAME:004058/0112
Effective date: 19820729
Aug 12, 1982ASAssignment
Owner name: FIDELITY COMMERCIAL FINANCE CORP. 765 BROAD ST. NE
Free format text: SECURITY INTEREST;ASSIGNOR:ITNOC DAIRY CAP CO., INC.;REEL/FRAME:004024/0008
Effective date: 19820729
Owner name: FIDELITY COMMERCIAL FINANCE CORP., NEW JERSEY
Aug 12, 1982AS06Security interest
Owner name: FIDELITY COMMERCIAL FINANCE CORP. 765 BROAD ST. NE
Owner name: ITNOC DAIRY CAP CO., INC.
Effective date: 19820729
Jan 21, 1981AS02Assignment of assignor's interest
Owner name: AMERICAN BILTRITE INC.,
Owner name: ITNOC DAIRY CAP CO. INC., 105-05 180TH ST., JAMAIC
Effective date: 19801017