Process for producing lines of weakness in the protective backin

Details Process for producing lines of weakness in the protective backin Process for producing lines of weakness in the protective backin

1980-07-10

1982-10-26

Albritton, C. L.

Electric heating

Metal heating

By arc

219121LJ, 219121LP, 356138, B23K 2700

Patent

active

043563759

ABSTRACT:
A process and apparatus for forming a line of weakness in the protective backing of an adhesive laminate is disclosed. The process is performed by generating a laser beam of sufficient energy to vaporize at least a portion of the protective backing of an adhesive laminate. The laser beam is focused in a focal line extending across the protective backing for a time sufficient for vaporizing at least a portion of the protective backing. At least a portion of the protective backing is vaporized with the laser beam to a depth sufficient for forming a line of weakness in the protective backing along the focal line.

REFERENCES:
patent: 2759393 (1956-08-01), McLeod
patent: 3419321 (1968-12-01), Barber et al.
patent: 3909582 (1975-09-01), Bowen
patent: 3965327 (1976-06-01), Ehlscheid et al.
patent: 4069080 (1978-01-01), Osborne

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