WO2003099672A1 - Helical lock closure system - Google Patents

Helical lock closure system Download PDF

Info

Publication number
WO2003099672A1
WO2003099672A1 PCT/US2003/016427 US0316427W WO03099672A1 WO 2003099672 A1 WO2003099672 A1 WO 2003099672A1 US 0316427 W US0316427 W US 0316427W WO 03099672 A1 WO03099672 A1 WO 03099672A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
cap
lugs
tapered
circumferentially
Prior art date
Application number
PCT/US2003/016427
Other languages
French (fr)
Inventor
David A. Manera
John D. Buehler
Original Assignee
Comar, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Comar, Inc. filed Critical Comar, Inc.
Priority to AU2003239615A priority Critical patent/AU2003239615A1/en
Publication of WO2003099672A1 publication Critical patent/WO2003099672A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/06—Threaded or like caps or cap-like covers secured by rotation with bayonet cams, i.e. removed by first pushing axially to disengage the cams and then rotating

Definitions

  • the present invention relates to improvements in container-closure assemblies useful, for example, for use in the medical field for pills and the like. More specifically, the container-closure assembly of the present invention is characterized by novel features of construction and arrangement providing a child- resistant feature and is configured in a predetermined way so that it is easy to open and close by adult users even the elderly and those that are somewhat lame or handicapped. BACKGROUND OF THE INVENTION
  • Container-closure assemblies of the general type to which the present invention relates are not new per se.
  • the cap and the container are molded of the same plastic material.
  • the container finish includes a series of circumferentially spaced camming latches (36) having a notch (40) and a tapered face leading to the notch (38) the inner sidewall of the cap has a series of circumferentially spaced locking lugs (34).
  • TITLE MOLDED PLASTIC CAP FOR DISPENSING LIQUIDS PATENT NO.: NOVEMBER 4, 1997 DATE: NOVEMBER 4, 1997
  • TITLE ONE-PIECE MOISTURE TIGHT SAFETY CLOSURE AND CONTAINER PATENT NO.: 4,579,238
  • DATE APRIL 1 , 1986 BATCHELOR. et al.
  • the cap and container may be made of a plastic material which are preferably of different plastic materials.
  • the cap is generally of cup-like form having a top and
  • the cap has a series of circumferentially spaced inwardly directed lugs which cooperate with a slot and hook arrangement on the container finish for securing the cap on the container.
  • the outer peripheral wall of the container adjacent the discharge opening is tapered to complement the flange taper on the cap.
  • the slot and hook arrangement includes a tip portion with a tapered face and a notched recess for receiving the lugs on the cap in the locked position.
  • An important feature of the present invention is the orientation of the lugs and
  • the lugs on the cap are positioned in a trackway between the hook arrangements on the containerfinish below a plane transverse to the longitudinal access of the container through the uppermost portion of the tapered tip of the hook so that it is only necessary to rotate the cap so that to ride on the cam surface and positions lug in the notched recess to lock the cap in place.
  • Another advantage to the lug arrangement is that it allows automated capping on existing equipment which were generally built for screw thread closures and do not have the ability to provide downward movement/force. They were built to provide rotational movement only.
  • Fig. 1 A is a top plan viewof a container-closure assembly in accordance with the present invention
  • Fig. 1 B is a side elevational view of the container-closure assembly in accordance with the present invention.
  • Fig. 1C is a bottom plan view as viewed along the lines 1C-1C of Fig. 1B;
  • Fig.2 is an exploded side elevational view showing the closure removed from the container
  • Fig. 3A is an enlarged transverse sectional view of the closure or cap
  • Fig. 3B is a view looking into the bottom of the cap as taken along lines SB- SB of Fig. 3A;
  • Fig. 3C is an enlarged fragmentary sectional view of the portion of the cap circled in broken lines in Fig. 3A;
  • Fig. 4A is a side elevational view partly in section showing assembly of the cap to the container;
  • Fig 4B is an enlarged fragmentary sectional view of the portion of the cap circled in Fig. 4A and identified by the numeral 4B;
  • Fig. 5A is a developed view showing the position of the lugs relative to the trackway and hook configuration on the exterior of the neck of the container;
  • Fig. 5B is a view similar to Fig. 5A showing the cap in a position before with the lugs partially seated;
  • Fig. 5C is a view showing the cap in the lock position on the container.
  • Fig. 6 is an enlarged sectional view, showing the position of the cap lugs when the flexible cap flange initially engages the container tapered finish.
  • the container-closure assembly may be molded of plastic materials and preferably are of different plastic materials.
  • the container (10) comprises a body portion (12), in the present instance of generally square cross section and a generally cylindrical reduced neck portion (14).
  • the neck portion (14) has a series of camming latches (36) having cam-receiving notches or pocket and the cap (20) has a series of lugs (34) engageable in the notched recesses (40).
  • the cap (20) as best illustrated in Figs. 3 and 4 is of inverted cup-like shape having a disclike top (22) and a depending circumferentially extending skirt (24).
  • the cap (20) also includes a circumferentially extending flange or fin (26) depending interiorly from the top (22) which has a feathered configuration.
  • the fin (26) extends downwardly from the top (22) a shorter axial distance than the skirt (24).
  • the fin (26) is somewhat flexible and engages a beveled wall (30) of the container (10) in the manner shown in Fig.4B when the cap (20) is assembled to the container (10).
  • the beveled wall (30) is preferably disposed at an angle theta ⁇ of less than five degrees (5°) to the longitudinal axis A-A of the neck portion (14) of the container (10).
  • the interior side wall (32) has a series of circumferentially equi- spaced lugs (34) which project radially inwardly from the interior sidewall (32) of the skirt (24).
  • the neck portion (14) of the container (10) is formed with a series of circumferentially spaced hook elements (36) which have an inclined camming surface (38) and a locking pocket (40).
  • the hooks (36) are spaced apart a predetermined distance so that the camming faces (38) are spaced from the inclined back surface (41 ) of an adjacent hook (36) to define a trackway (42) between adjacent hook elements (36) as best shown in Figs. 5A-5C.
  • the fin (26) and cam surface (30) are sized and dimensioned in a predetermined manner so that when the cap (20) is placed over the neck of the container (10) and the fin(26) lightly engages the beveled surface (30) on the neck the lugs (34) are positioned in the trackway (42) so that it is only necessary to rotate the cap (20) without exertion of any axial force or pressure on the cap (20) to seat the lugs (34) in the locking pockets (40).
  • the arrangement provides a child resistant assembly since in order to release the cap (20), the top wall of the cap (20) has to be pressed axially inwardly to displace the lugs (34) downwardly in the trackway (42) to clear the hook so that the cap (20) can be rotated so that the lugs (34) are displaced circumferentially from the hook portions (36) and thereby permit removal of the cap (20).
  • the cap (20) and container (10) are preferably made of different plastic materials.
  • the cap (20) can be made of a propylene and the container (10) may be formed of a polyethylene material. It has been found that this combination facilitates a good sealing action between the cap (20) and the container (10) and facilitates relatively easy manipulation of the parts to position them between locked and released positions. Other combinations are possible but dissimilar materials provide reduced friction through elimination of the phenomena known in the industry as galling.
  • cap (20) will drop downwardly until the lip lightly engages the chamfer surface (30).
  • the cap (20) is rotated in a clockwise direction, whereby the lugs (34) ride down the beveled face (38) of the hooks(36) thereby pressing the lip (26) against the beveled surface (30) until the lugs (34) are disposed in the hook pockets.
  • the cap (20) and closure locking action then is somewhat different from a conventional push turn closure of the prior art where an axial pushing force is needed to position the parts in a seated or locked position.
  • the relationship of the lugs (34) and the lip (26) and the beveled surface (30) are such that the user simply rotates the cap (20) until the lugs (34) are positioned in the trackways (42) and then simply rotated in the manner described above until the lugs (34) are seated in the locking pockets.
  • the top of each lug (34) lies below a plane P-P transverse to the axis A-A, thus positioning the top edge (34a) of the lug (34) below the cam face surface (38).
  • the lugs (34) assume this position when the flange (26) lightly engages the tapered end face (30) of the containerfinish.

Abstract

A container-closure assembly comprising a cap (20) of cup-like form having a circumferentially expending skirt (24) and a circumferentially extending flange (26) depending from the top and spaced radially inwardly from the skirt and a series of radially inwardly directed circumferentially re-spaced lugs (34) on the inner periphery of the skirt, the container having a neck portion with a discharge opening, the outer peripheral surface (30) of the container being tapered upwardly and inwardly whereby the flexible flange engages the tapered surface when the cap is positioned over the container means defining a series of circumferentially re-spaced hook portions only on the container neck including a downwardly facing notched recess (40) and a tapered face (38), the lugs positioned below a plain through the tip of the taper only hooks when the flexible flange lightly engages the tapered finish on the neck of the container.

Description

HELICAL LOCK CLOSURE
SYSTEM
This application claims the benefit of United States Provisional Application Serial No.: 60/382,538, filed May 24, 2002.
FIELD OF THE INVENTION
The present invention relates to improvements in container-closure assemblies useful, for example, for use in the medical field for pills and the like. More specifically, the container-closure assembly of the present invention is characterized by novel features of construction and arrangement providing a child- resistant feature and is configured in a predetermined way so that it is easy to open and close by adult users even the elderly and those that are somewhat lame or handicapped. BACKGROUND OF THE INVENTION
Container-closure assemblies of the general type to which the present invention relates are not new per se. Akers, United States Patent No.: 5,449,078, for COMBINATION OF A CONTAINER AND A SAFETY CAP THEREFOR, shows a combination container and so-called safety cap wherein the cap has a resilient depending inner member which engages a rigid wall of a container, the resilient
depending member and container finish having complementary tapers. The cap and the container are molded of the same plastic material. The container finish includes a series of circumferentially spaced camming latches (36) having a notch (40) and a tapered face leading to the notch (38) the inner sidewall of the cap has a series of circumferentially spaced locking lugs (34). When the user wants to apply the cap, the cap is positioned over the container so the locking lugs (34) are aligned with the spaces between the camming latches (36) and then the cap is pressed downwardly and rotated until the locking lug is engaged in the notch (40). Often times, the elderly and lame have difficulty in pressing and turning in the same operation and find it difficult if not impossible to secure the cap in a locked position on the container. Furthermore, it has been found that having the cap and container of the same material produces so-called galling which also contributes to the difficulty in operating the cap between open and closed positions. Other prior art of interest include the patents listed below:
REFERENCE PATENTS:
HEDGEWICK
TITLE: SAFETY CAP AND CONTAINER PATENT NO.: 3,344,942 DATE: OCTOBER 3, 1967
HEDGEWICK. et al.
TITLE: SAFETY CAP AND CONTAINER PATENT NO.: 3,478,911 DATE: NOVEMBER 18, 1969
LANDEN
TITLE: SAFETY-CLOSURE DEVICE PATENT NO.: 3,613,928 DATE: OCTOBER 19, 1971
JULIAN, et al.
TITLE: SAFETY CLOSURE FOR A MEDICINE BOTTLE OR THE LIKE PATENT NO.: 3,716,161 DATE: FEBRUARY 13, 1973
DEGAETANO
TITLE: LIQUID-PROOF SAFETY CLOSURE PATENT NO.: 3,739,933 DATE: JUNE 19, 1973
SANTAGIULIANA
TITLE: MOLDED PLASTIC CAP FOR DISPENSING LIQUIDS PATENT NO.: NOVEMBER 4, 1997 DATE: NOVEMBER 4, 1997
VON HAGEL
TITLE: BLOW MOLDED PLASTIC BOTTLE AND PLASTIC CAP PATENT NO.: 4,301 ,937 DATE: NOVEMBER 24, 1981
HERR
TITLE: ONE-PIECE MOISTURE TIGHT SAFETY CLOSURE AND CONTAINER PATENT NO.: 4,579,238 DATE: APRIL 1 , 1986 BATCHELOR. et al.
TITLE: CHILD RESISTANT CONTAINER FOR STORING HAZARDOUS
MATERIALS
PATENT NO.: 5,033,634
DATE: JULY 23, 1991
SUMMARY OF THE INVENTION
With the foregoing in mind, it is an object of the present invention to provide a new and improved container closure assembly generally of the type described above which overcomes the disadvantage and drawbacks of the prior art. Thus the cap and container may be made of a plastic material which are preferably of different plastic materials. The cap is generally of cup-like form having a top and
a generally cylindrical skirt depending from the top and a circumferentially extending flexible flange depending from the top and spaced inwardly from the skirt which has a tapered inner face preferably disposed at a small angle of about five degrees (5°) to the longitudinal axis to the cap. The cap has a series of circumferentially spaced inwardly directed lugs which cooperate with a slot and hook arrangement on the container finish for securing the cap on the container. The outer peripheral wall of the container adjacent the discharge opening is tapered to complement the flange taper on the cap. The slot and hook arrangement includes a tip portion with a tapered face and a notched recess for receiving the lugs on the cap in the locked position.
An important feature of the present invention is the orientation of the lugs and
the cap relative to the tapered face of the hook portion. Specifically when the cap
is positioned over the container, and the taper face of the cap flexible flange and the beveled outerface of the containerfinish engage, the lugs on the cap are positioned in a trackway between the hook arrangements on the containerfinish below a plane transverse to the longitudinal access of the container through the uppermost portion of the tapered tip of the hook so that it is only necessary to rotate the cap so that to ride on the cam surface and positions lug in the notched recess to lock the cap in place. By this arrangement, elderly and even lame people can easily assemble the cap to the container when desired without the need for pushing the cap axially downwardly to engage in the notched recesses.
Another advantage to the lug arrangement is that it allows automated capping on existing equipment which were generally built for screw thread closures and do not have the ability to provide downward movement/force. They were built to provide rotational movement only.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 A is a top plan viewof a container-closure assembly in accordance with the present invention;
Fig. 1 B is a side elevational view of the container-closure assembly in accordance with the present invention;
Fig. 1C is a bottom plan view as viewed along the lines 1C-1C of Fig. 1B;
Fig.2 is an exploded side elevational view showing the closure removed from the container;
Fig. 3A is an enlarged transverse sectional view of the closure or cap;
Fig. 3B is a view looking into the bottom of the cap as taken along lines SB- SB of Fig. 3A;
Fig. 3C is an enlarged fragmentary sectional view of the portion of the cap circled in broken lines in Fig. 3A;
Fig. 4A is a side elevational view partly in section showing assembly of the cap to the container;
Fig 4B is an enlarged fragmentary sectional view of the portion of the cap circled in Fig. 4A and identified by the numeral 4B;
Fig. 5A is a developed view showing the position of the lugs relative to the trackway and hook configuration on the exterior of the neck of the container; Fig. 5B is a view similar to Fig. 5A showing the cap in a position before with the lugs partially seated;
Fig. 5C is a view showing the cap in the lock position on the container; and
Fig. 6 is an enlarged sectional view, showing the position of the cap lugs when the flexible cap flange initially engages the container tapered finish.
DESCRIPTION OF PREFERRED EMBODIMENT
Referring now to the drawings and particularly to Figs. 1-2 thereof, there is shown a container-closure assembly in accordance with the with the present invention. The container-closure assembly may be molded of plastic materials and preferably are of different plastic materials.
The container (10) comprises a body portion (12), in the present instance of generally square cross section and a generally cylindrical reduced neck portion (14). The neck portion (14) has a series of camming latches (36) having cam-receiving notches or pocket and the cap (20) has a series of lugs (34) engageable in the notched recesses (40).
Considering now the cap (20) and closure in more specific detail, the cap (20) as best illustrated in Figs. 3 and 4 is of inverted cup-like shape having a disclike top (22) and a depending circumferentially extending skirt (24). The cap (20) also includes a circumferentially extending flange or fin (26) depending interiorly from the top (22) which has a feathered configuration. The fin (26) extends downwardly from the top (22) a shorter axial distance than the skirt (24). The fin (26) is somewhat flexible and engages a beveled wall (30) of the container (10) in the manner shown in Fig.4B when the cap (20) is assembled to the container (10).
The beveled wall (30) is preferably disposed at an angle theta θ of less than five degrees (5°) to the longitudinal axis A-A of the neck portion (14) of the container (10). The interior side wall (32) has a series of circumferentially equi- spaced lugs (34) which project radially inwardly from the interior sidewall (32) of the skirt (24). The neck portion (14) of the container (10) is formed with a series of circumferentially spaced hook elements (36) which have an inclined camming surface (38) and a locking pocket (40). The hooks (36) are spaced apart a predetermined distance so that the camming faces (38) are spaced from the inclined back surface (41 ) of an adjacent hook (36) to define a trackway (42) between adjacent hook elements (36) as best shown in Figs. 5A-5C. The fin (26) and cam surface (30) are sized and dimensioned in a predetermined manner so that when the cap (20) is placed over the neck of the container (10) and the fin(26) lightly engages the beveled surface (30) on the neck the lugs (34) are positioned in the trackway (42) so that it is only necessary to rotate the cap (20) without exertion of any axial force or pressure on the cap (20) to seat the lugs (34) in the locking pockets (40). The arrangement provides a child resistant assembly since in order to release the cap (20), the top wall of the cap (20) has to be pressed axially inwardly to displace the lugs (34) downwardly in the trackway (42) to clear the hook so that the cap (20) can be rotated so that the lugs (34) are displaced circumferentially from the hook portions (36) and thereby permit removal of the cap (20).
The pressure of the fin (26) engaging the beveled surface (30) in the locked position creates an upward force on the cap (20) to displace it upwardly when it is rotated to position the lugs (34) in the trackway (42), the cap (20) is free for removal.
The cap (20) and container (10) are preferably made of different plastic materials.
For example, the cap (20) can be made of a propylene and the container (10) may be formed of a polyethylene material. It has been found that this combination facilitates a good sealing action between the cap (20) and the container (10) and facilitates relatively easy manipulation of the parts to position them between locked and released positions. Other combinations are possible but dissimilar materials provide reduced friction through elimination of the phenomena known in the industry as galling.
Considering now operation of a container closure in accordance with the present invention as described above and assume that the cap (20) is in a locked position on the container (10) in the manner shown in Fig. 1 B. In this instance, the fin (26) presses against the beveled wall (30) of the container (10) a seating force is produced seating and the lugs (34) in the pockets (36). Specifically, there is an upward force tending to press the lugs (34) upwardly against the upper face of the pocket (36). Now when the user desires to remove the cap (20), he needs to press it downwardly and rotate the cap (20) in a counterclockwise direction as shown in Fig.4A until the lugs (34) are positioned in the trackway between the hook (36) and slanted back surface of the next adjacent hook (36) in which event the cap (20) is released and can be withdrawn axially upwardly to access the contents of the container 10. Now when it is desired to reapply the cap (20), it is simply positioned loosely over the container (10). The cap (20) is then rotated relative to the container (10) until the lugs (34) are aligned with the space between adjacent hooks (36) in which event, the cap
(20) will drop downwardly until the lip lightly engages the chamfer surface (30). In this position, the cap (20) is rotated in a clockwise direction, whereby the lugs (34) ride down the beveled face (38) of the hooks(36) thereby pressing the lip (26) against the beveled surface (30) until the lugs (34) are disposed in the hook pockets. The cap (20) and closure locking action then is somewhat different from a conventional push turn closure of the prior art where an axial pushing force is needed to position the parts in a seated or locked position. In the present instance, the relationship of the lugs (34) and the lip (26) and the beveled surface (30) are such that the user simply rotates the cap (20) until the lugs (34) are positioned in the trackways (42) and then simply rotated in the manner described above until the lugs (34) are seated in the locking pockets. Note that when the cap lugs are aligned with the entrance to the trackway (42) the top of each lug (34) lies below a plane P-P transverse to the axis A-A, thus positioning the top edge (34a) of the lug (34) below the cam face surface (38). Note that the lugs (34) assume this position when the flange (26) lightly engages the tapered end face (30) of the containerfinish. By this arrangement, the user simply has to rotate the cap (20) whereby the lugs (34) ride down the tapered face (38) of the hook member and engage in the notch (40) to lock the cap in place. Even though a particular embodiment of the present invention has been illustrated and described herein, it is not intended to limit the invention and changes and modifications may be therein within the scope of the following claims.

Claims

CLAIMSWhat is Claimed is:
1. A container-closure assembly comprising a cap of cup-like form having a circumferentially expending skirt and a circumferentially extending flange depending from the top and spaced radially inwardly from the skirt and a series of radially inwardly directed circumferentially spaced lugs on the inner periphery of the skirt, the container having a neck portion with a discharge opening, the outer peripheral surface of the container adjacent said discharge opening being tapered upwardly and inwardly whereby the flexible flange engages the tapered surface when the cap is positioned over the container, means defining a series of circumferentially extending, spaced hook portions on the container neck having a downwardly facing notched recess and a tapered face, said lugs positioned below a plane through the tip of the taper on the hooks when the flexible flange lightly engages the tapered finish on the neck of the container.
2. A container-closure assembly as claimed in Claim 1 wherein at least the inter- engaging surfaces of the flexible flange and the beveled container finish are of different plastic materials.
3. A container-closure assembly as claimed in Claim 2 wherein one of said inter- engaging surfaces is propylene and the other surface is polyethylene.
4. A container-closure assembly as claimed in Claim 3 wherein the hook elements have a downwardly tapered cam surface and wherein the lugs are disposed below a plane transverse to the axis of the container extending through the highest point on the cam surfaces so that the cap only has to be rotated to engage the lugs into the locking slots to secure the cap to the container.
PCT/US2003/016427 2002-05-24 2003-05-23 Helical lock closure system WO2003099672A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003239615A AU2003239615A1 (en) 2002-05-24 2003-05-23 Helical lock closure system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US38253802P 2002-05-24 2002-05-24
US60/382,538 2002-05-24

Publications (1)

Publication Number Publication Date
WO2003099672A1 true WO2003099672A1 (en) 2003-12-04

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ID=29584426

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Application Number Title Priority Date Filing Date
PCT/US2003/016427 WO2003099672A1 (en) 2002-05-24 2003-05-23 Helical lock closure system

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US (1) US20040007556A1 (en)
AU (1) AU2003239615A1 (en)
WO (1) WO2003099672A1 (en)

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US8141793B2 (en) 2009-07-14 2012-03-27 The Dial Corporation Gel air freshener and method of unsealing such gel air freshener
US8231020B2 (en) 2010-05-27 2012-07-31 Silgan White Cap LLC Impact resistant closure
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