Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1991-02-06
1992-05-19
Weston, Caleb
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156242, 156245, 1562722, 1562744, 220270, B29B 4500
Patent
active
051145073
ABSTRACT:
A cover device for a packaging container usable as a reclosable closure, comprising an outer layer provided with an easy opening device which has a grip and at least a tearing denotation extending circumferentially around the cover device. Additionally, the inner layer is attached to the outer layer at least at both sides of said tearing denotation.
The inner layer is covered only partially by the outer layer, leaving a central portion of the inner layer exposed to the environment.
A grip in the shape of a pull-ring is arranged in said central portion, and a strip-shaped connection portion connects the ring to a relatively narrow strip-shaped part of the outer layer, said part being removable together with the inner layer along a line defined by said circumferential tearing denotation. Of course, such tearing and removing facility necessitates that the tearing strength of the inner layer is lower than the weld strength and that the tearing denotation has a proper strength and is well-defined.
REFERENCES:
patent: 3549440 (1970-12-01), Adcock
patent: 4548333 (1985-10-01), Kobayashi et al.
patent: 4830214 (1989-05-01), Curliss et al.
patent: 4867336 (1989-09-01), Stewart
patent: 4913306 (1990-04-01), Piltz
patent: 4913307 (1990-04-01), Takata et al.
patent: 4966301 (1990-10-01), Yamashita et al.
patent: 5013828 (1991-05-01), Fries
Piltz Lars-Erik
Stenberg Stina
AB Akerlund & Rausing
Weston Caleb
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