Method of providing score lines in packaging material

Details Method of providing score lines in packaging material Method of providing score lines in packaging material

1989-08-31

1991-03-19

Terrell, William E.

Electric heating

Metal heating

By arc

21912181, 493341, B23K 2600, B31B 125

Patent

active

050013254

ABSTRACT:
A method of providing score lines in packaging material by local evaporation using a laser beam, wherein the laser beam and the packaging material are movable relative to each other. The score lines are provided in a recurring pattern on at least one side of a web of packaging material as it advances at a uniform, adjustable speed. The intensity of the laser beam is adjustable, and the laser beam is moved in two mutually perpendicular directions under the control of pattern-dependent signals.

REFERENCES:
patent: 3409206 (1968-11-01), Slouka et al.
patent: 3626143 (1971-12-01), Fry
patent: 3893129 (1975-07-01), Endo et al.
patent: 3909582 (1975-09-01), Bowen
patent: 4160894 (1979-07-01), Stemmler et al.
patent: 4307282 (1981-12-01), Gappa
patent: 4549063 (1985-10-01), Ang et al.
patent: 4740163 (1988-04-01), Kuchenbecker
patent: 4816015 (1989-03-01), Holder et al.

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