Title: Bottle caps

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Claims: We claim:

1. A cap for a container having a neck defining an opening, said cap comprising an upper wall to overlie the opening and having a peripherally depending skirt to engage the neck to secure the cap in position over the opening and a tear tab projecting radially from said skirt, and score lines on said wall defining a tear portion, said score lines consisting of two weakening lines traversing the cap at least one of which extends across opposite portions of said skirt substantially in line with an edge of said tear tab, each of said weakening lines on said upper wall being arranged substantially adjacent and parallel to the boundary between said upper wall and the skirt, and a peripheral sealing element bonded to the inside surface of the wall and covering said inside surface of the wall along the length of said score lines.

2. The cap of claim 1 wherein the sealing element consists of a ring seal.

3. The cap of claim 2, wherein said ring seal is bonded to the cap within the area of said tear portion and is broken during the initial tearing operation.

4. The cap of claim 2 wherein said ring seal comprises a thin film on both sides of each of the score lines along their length and said film is arranged to be broken during the tearing operation so that the relatively sharp tear edges obtained are masked to a certain extent by said film.

5. The cap of claim 1 wherein the bond between said sealing element and said wall comprises an adhesive.

6. The cap of claim 1 in which each of said weakening lines extends across opposite portions of said skirt substantially in line with an edge of said tear tab.

Other info:

Inventors: Harding, Sune (Partille, SW)

Application Number: 536719
Filing Date: 1974-12-27
Publication_date: 1976-06-15
Assignee: AB Wicanders Korkfabriker (Alvangen, SW)
Primary Class(es): 215/254
Other Classes:
US Patent Ref:

2068444	Jan, 1937	Breckenridge	215/254.
3199705	Aug, 1965	Brockett	215/254.
3216602	Nov, 1965	Koll	215/254.
3276613	Oct, 1966	Bozek	215/254.
3310192	Mar, 1967	Edwards	215/254.
3338445	Aug, 1967	Lange	215/254.
3397661	Aug, 1968	Allman	215/254.

Other Refs: 342,199

Jan, 1972	SW

Primary Examiner: Norton, Donald F.
Assistant Examiner:
Attorney: Brumbaugh, Graves, Donohue & Raymond