Electric heating – Metal heating – Cutting or disintegrating
Patent
1989-05-02
1991-10-29
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
29 2542, 219 1055E, 346163, B23K 1100, H05B 680
Patent
active
050618377
ABSTRACT:
A method and apparatus for selectively demetallizing a metallized film whereby the metallized web is selectively demetallized by bringing the web into contact with two electrodes, one of which contacts a greater surface area of the web than the other, and maintaining an electrical potential difference between the two electrodes. Preferably, the electrodes comprise rollers, one of which may be provided with a predetermined pattern. The potential difference between the respective electrodes can be controlled to effect selected demetalization of predetermined desired regions of the web or to vary the extent of demetalization from a desired region. The web material can subsequently be used as microwavable packaging material.
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Gilbert William B.
Roberts Jack V.
Walker Alfred J.
Evans Geoffrey S.
Webex, Inc.
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