Crown caps for drug containers

• US 5,957,314 A
• Filed: 12/08/1997
• Issued: 09/28/1999
• Est. Priority Date: 04/09/1996
• Status: Expired due to Fees

• Current Assignee: Taisei Kako Co. Ltd.
• Original Assignee: Taisei Kako Co. Ltd.
• Inventors: Yoshimi, Kouiti, Hamamoto, Keiji, Nishida, Hirotaka
• Primary Examiner(s): Cronin, Stephen K.
• Assistant Examiner(s): NEWHOUSE, NATHAN JEFFREY
• Application Number:
  US08/973,423
• Time in Patent Office: 659 Days
• Field of Search: 215/247, 215/249, 215/224, 215/275, 215/277, 215/293, 215/317, 215/232, 215/251, 220/320, 220/359.1, 220/359.2, 220/359.3, 220/359.4, 220/258, 220/257, 220/256, 220/254, 220/359.5
• US Class Current: 215/249
• CPC Class Codes: B65D 45/322 the clamping device being an annular member moved axially to clamp the closure by using radial pressure B65D55/0863, B65D55/0872 take precedence
• CPC Class Codes: B65D 51/002 Closures to be pierced by an extracting-device for the contents and fixed on the container by separate retaining means
• CPC Class Codes: B65D 51/241 provided with freeze-drying means

Abstract

A rubber gasket is closely sealed by integrally connecting a removable close-fastening ring to a top board of a crown-like member to be fitted to a mouth portion in which a liquid drug is kept and pulling down the close-fastening ring to cover the outer periphery of the crown-like member.

Claims

1. A crown cap which comprises a close-fastening ring integrally separably formed on an upper portion of a crown/member comprising a cylindrical body which is fitted to a mouth portion of a container while surrounding a periphery of the mouth portion and having a diameter slightly greater than that of the crown/member and which is used in such a manner that a close-fastening ring is detached from the crown/member and put on an outer periphery of the crown/member by pressing the ring towards a side of the crown/member to thus closely fit the crown/member to the mouth portion of the container,

wherein an opening is preliminarily formed through a top board of the crown/member, a removable closing body is fitted to the opening, the opening is exposed on the top board of the crown/member by disconnecting the closing body, and a plurality of projections for welding are formed on a lower surface of the closing body and the closing body is welded, through the projections, to the board of the crown/member at a strength ranging from 0.5 to 3 kgf as expressed in terms of an overall tensile strength.

2. The crown cap of claim 1 wherein the closing body comprises an elongated rod-shaped body which is removably fitted to an inner wall of the opening and stands up from the opening.

3. The crown cap of claim 1 wherein the closing body comprises a flat portion which is supported by and fitted to the opening and a finger-hook ring which can be pulled to remove the closing body.

4. The crown cap of claim 1 wherein an overall basal area of the plurality of projections for welding ranges from 0.4 to 2 mm².

5. The crown cap of claim 1 wherein the closing body, the crown/member, and the close-fastening ring are formed from a thermoplastic resin.

6. The crown cap of claim 1 wherein the closing body, the crown/member, and the close-fastening ring are formed from at least one resin selected from polycarbonates, polyethylene terephthalates, and polybutylene terephthalates.

7. A crown cap which comprises a close-fastening ring integrally separably formed on an upper portion of a crown/member which is fitted to a mouth portion of a container while surrounding a periphery of the mouth portion and having a diameter slightly greater than that of the crown/member and which is used in such a manner that the close-fastening ring is detached from the crown/member and put on an outer periphery of the crown/member by pressing the ring towards a side of the crown/member to thus closely fit the crown/member to the mouth portion of the container,

wherein a rubber gasket seals an opening of the mouth portion;

fixing means are disposed between the crown/member and the rubber gasket for preventing separation of the rubber gasket from the mouth portion,

and a plurality of projections for welding are formed on a lower surface of the closing body and the closing body is welded, through the projections, to a top board of the crown/member at a strength ranging from 0.5 to 3 kgf as expressed in terms of an overall tensile strength, the overall basal area of the plurality of the projections for welding ranging from 0.4 to 2 mm².

8. The crown cap of claim 7 wherein the fixing means comprises projections protruded from an inner periphery of the crown/member.

9. The crown cap of claim 7 wherein the fixing means comprises an adhesive layer which lies between the rubber gasket and the top board of the crown/member.

10. The crown cap of claim 7 wherein the closing body, the crown/member, and the close-fastening ring are formed from a thermoplastic resin.

11. The crown cap of claim 7 wherein the closing body, the crown/member, and the close-fastening ring are formed from at least one resin selected from polycarbonates, polyethylene terephthalates, and polybutylene terephthalates.