Method of scoring fracturable adhesive backing

Details Method of scoring fracturable adhesive backing Method of scoring fracturable adhesive backing

1972-11-27

1976-08-31

Coan, James F.

93 581, 83 12, 83 7, B26D 308

Patent

active

039773108

ABSTRACT:
A process and apparatus for selectively compressing paper stock of the type which is used as a protective backing sheet for adhesive-coated systems. The process comprises use of a novel compression tool, the precise characteristics of which depend on the paper stock being utilized. The compression tool comprises a blunt, rotatable, circular, working edge which has a radius of at least 0.02, but preferably at least 0.04 inches in diameter and at least one half of the thickness of the paper being weakened. This tool advantageously comprises the compressing edge, being mounted integrally with a bearing surface which makes pressure control easier and limits penetration of the tool. In the preferred embodiments of the invention, the bearing surface is faced with elastomeric material. Disclosure is also made of a novel release sheet and adhesive sheet assembly which is manufactured utilizing the process and apparatus of the invention.

REFERENCES:
patent: 1859513 (1932-05-01), Hope et al.
patent: 2319272 (1943-05-01), Starr
patent: 3006793 (1961-10-01), Wheeler
patent: 3035957 (1962-05-01), Morgan
patent: 3558425 (1971-01-01), Massari
patent: 3570337 (1971-03-01), Morgan

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