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Publication numberUS3690496 A
Publication typeGrant
Publication dateSep 12, 1972
Filing dateApr 1, 1971
Priority dateApr 1, 1971
Publication numberUS 3690496 A, US 3690496A, US-A-3690496, US3690496 A, US3690496A
InventorsGibson Royal H
Original AssigneeGibson Ass Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Safety closure for bottles
US 3690496 A
Abstract
A bottle closure in which the neck of the bottle is provided with upper and lower threaded portions separated by an unthreaded portion divided into two parts by an annular bead. A cap is provided with upper and lower internally threaded portions separated by an unthreaded portion of a width substantially equal to the width of the unthreaded portion of the neck. When removing the cap, the bead interferes with the lower threaded portion of the cap providing resistance to easy removal.
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Description  (OCR text may contain errors)

United States Patent 1151 3,690,496 Gibson 1 Sept. 12, 1972 [54] SAFETY CLOSURE FOR BOTTLES FOREIGN PATENTS OR APPLICATIONS Inventor: Royal Gibson, Rumson, NJ. $32,266 2/1953 Canada ..215/9 [73] Assignee: (clibsiz n c11Asl: 1o;iates Incorporated, Primal) Examiner seorge T. Hall or Attorney-Sandoe, l-lopgood & Calimalfde [22] Filed: April 1, 1971 [57] ABSTRACT [21] Appl.No.: 130,156

A bottle closure in which the neck of the bottle is provided with upper and lower threaded portions [52] US. Cl. ..215/9, 215/43, 215/31 eparated by an unthreaded portion divided into two [51] lnt.Cl. ..B65d 55/02 parts by an annular head. A cap is provided with [58] Field of Search ..2l5/9, 43, 41, 3l upper and lower internally threaded portions separated by an unthreaded portion of a width sub- [56] References Cied stantially equal to the width of the unthreaded portion of the neck. When removing the cap, the bead inter- UNITED STATES PATENTS feres with the lower threaded portion of the cap 2,960,247 ll/l960 Christie ..21s/9 pmdmg res'stance my 3,556,334 1/1971 Howard ..2l5/43 5 Claims, 3 Drawing Figures PATENTEU I973 3.690.496

INVENTOR. ROYAL H. GIBSON ATTORNEYS SAFETY CLOSURE FOR BO'I'I'LES This invention relates to closures for bottles and pertains particularly to screw threaded closures comprising a cap which is difficult for small children to remove. Such closures are sometimes referred to as childproof closures.

It is an object of the invention to provide a closure which is simple and inexpensive to manufacture, which is easily operable by an adult, but which requires more skill and strength to operate than is possessed by small children.

It is a further object of the invention to provide a closure which will provide a tight seal when the cap is screwed down tightly.

Other objects and advantages of the invention will appear hereinafter.

A preferred embodiment of the invention is shown in the accompanying drawings in which,

FIG. 1 is a vertical section through the neck of a bottle and a cap shown in sealing position."

FIG. 2 is a similar view showing the cap in an intermediate position.

FIG. 3 is a similar view showing the cap in position to be removed from the bottle.

Referring to the drawings, the neck 1 of the bottle 2 is provided with a lower helically threaded portion 3, and an upper helically threaded portion 4. Between the lower and upper threaded portions of the neck is an unthreaded portion which is divided into two unthreaded portions 5 and 6 by an annular bead 7 which protrudes beyond the unthreaded portions of the neck a distance approximately equal to the height of the threads of the portions 3 and 4. Preferably the two unthreaded portions 5 and 6 are of substantially equal width.

The cap, preferably made of a yielding plastic material such as polypropylene or polyethylene, comprises a circular disk 8 having a substantially cylindrical or slightly tapered skirt 9 depending from the periphery thereof. The skirt 9 is provided internally with a lower helically threaded portion 10 and an upper helically threaded portion 11, and between the two threaded portions is an unthreaded portion 12. The width of the unthreaded portion of the cap is substantially equal to the total width of the unthreaded portion of the neck. The width of each of the threaded portions of the cap is less than the width of the unthreaded portions 5 and 6 of the neck.

The interior of the cap is provided with a disk 13 of conventional sealing material adapted to be squeezed between the cap disk 8 and the end of the bottle neck to seal the bottle.

As shown in FIG. 1, when the cap is screwed down tightly to seal the bottle, the upper screw thread 11 of the cap is in engagement with the screw thread 4 of the bottle and the lower screw thread 10 of the cap is in engagement with the lower screw thread 3 of the bottle. The unthreaded portion 12 of the cap spans the space between the two threaded portions of the bottle and clears the annular rib 7 of the bottle.

When it is desired to remove the cap from the bottle, the cap is first unscrewed until the lower threads 3 and 10 of the bottle and cap, respectively, are disengaged. At the same time, the upper threads 4 and 11 are disena ed, the s acin between the res ctive u er and ov%er sets 0 thre ads being substar t ially eq l as to cause substantially simultaneous disengagement.

At this stage, however, the lower thread 10 of the cap is located opposite the unthreaded portion 6 of the bottle. The cap is retained on the bottle by the interference between the lower threads 10 and the head 7 but can turn freely on the bottle. In order to remove the cap from the bottle, it must be pulled axially upward to force the lower threads 10 of the cap over the bead 7 to a position opposite the unthreaded portion 5. The interference between the bead 7 and the threads 10 provides substantial resistance to upward movement. Then, upon further upward movement of the cap, the lower thread 10 of the cap may be caused to engage the upper thread 4 of the bottle, whereupon the cap may be unscrewed from the bottle.

In the process of removing the cap from the bottle more force is required to overcome the interference between the lower thread 10 of the cap and the bead 7 than can be applied by small children even though they may be sufficiently intelligent to understand what is required. The closure is especially well adapted for use for bottles containing solid objects such as pills, some of which can be extremely dangerous to small children.

I claim as my invention:

1. A closure for a bottle comprising a neck having an upper threaded portion and a lower threaded portion, said threaded portions being spaced apart by an unthreaded portion, said unthreaded portion having an annular bead projecting outwardly therefrom, a cap having a skirt provided internally with an upper threaded portion and a lower threaded portion, said threaded portions being spaced apart by an unthreaded portion of a length substantially equal to the length of the unthreaded portion of the bottle neck, the outside diameter of said bead being sufficient to interfere with the lower threaded portion of said cap.

2. A closure as claimed in claim 1 in which the width of the unthreaded portion of said neck between said bead and said lower threaded portion is greater than the width of the lower threaded portion of said cap.

3. A closure as claimed in claim 1 in which said bead divides the unthreaded portion of said neck into two portions of substantially equal width, the width of each of said two portions being greater than the width of the lower threaded portion of the cap.

4. A closure as claimed in claim 1 in which the width of each of said threaded portions of said neck and said cap is substantially equal.

5. A closure as claimed in claim 3 in which the width of each of said threaded portions of said neck and said cap is substantially equal.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2960247 *Mar 10, 1958Nov 15, 1960J T OlsonContainer safety closure
US3556334 *May 1, 1969Jan 19, 1971Flexible Plastics CorpResealable container
CA532266A *Oct 30, 1956Andre LefebvreSafety closures for containers
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3827593 *Mar 16, 1973Aug 6, 1974K I C IncContainer safety closure
US4058232 *Oct 29, 1976Nov 15, 1977Iko Trading Co., Ltd.Safety cap
US5464110 *Jul 19, 1994Nov 7, 1995Heyworth; Richard G.Double sided container closure and cooperating container
US6695160Aug 30, 2001Feb 24, 2004Rexam Medical Packaging Inc.Top load seal protection feature
US6877626 *Dec 30, 2002Apr 12, 2005Joseph SherrodSpill proof cap for different sized bottle openings
US6968965Oct 3, 2003Nov 29, 2005Cunningham Kelly WContainer closure assembly
US7198162 *Jun 27, 2003Apr 3, 2007Rexam Medical Packaging Inc.Molded closure and apparatus for making same
US7293396Jun 14, 2005Nov 13, 2007Cunningham Kelly WMethod of connecting a top to a container
US7637402May 25, 2007Dec 29, 2009Polytop CorporationDispensing cap with center channel and helical flow profile
US7735699Sep 4, 2007Jun 15, 2010Polytop CorporationDispensing closure having a flow conduit with key-hole shape
US7980432Nov 11, 2009Jul 19, 2011Polytop CorporationDispensing closure having a flow conduit with key-hole shape
US8038041Sep 4, 2007Oct 18, 2011Polytop Corporation, A Rhode Island CorporationDispensing closure with obstructed, offset, non-linear flow profile
US8302824Apr 28, 2010Nov 6, 2012Polytop LlcDispensing closure having a flow conduit with key-hole shape
US8336745May 24, 2011Dec 25, 2012Mwv Slatersville, LlcDispensing closure having a flow conduit with key-hole shape
US9067715 *Jul 18, 2008Jun 30, 2015Jeong-min LeeBottle cap
US20040124170 *Dec 30, 2002Jul 1, 2004Joseph SherrodSpill proof cap for different sized bottle openings
US20110163103 *Jul 18, 2008Jul 7, 2011Lee Jeong-MinBottle cap
US20140103003 *May 3, 2012Apr 17, 2014Guala Closures S.P.A.Container for recyclable closure and container closure assembly with said container
Classifications
U.S. Classification215/217, 215/45, 215/44
International ClassificationB65D41/04, B65D50/00, B65D50/06
Cooperative ClassificationB65D2251/205, B65D50/063, B65D41/04
European ClassificationB65D50/06C, B65D41/04