Adhesive bonding and miscellaneous chemical manufacture – Differential fluid etching apparatus – With microwave gas energizing means
Patent
1991-11-27
1992-08-25
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Differential fluid etching apparatus
With microwave gas energizing means
156584, 430253, 430256, 271285, B32B 3500, G03C 1112
Patent
active
051415844
ABSTRACT:
Apparatus and method for delaminating a composite sheet structure of the kind comprising a vertically frangible layer having a first surface adhesively bonded to a first sheet at a substantially uniform strength and an opposite surface abutting areas which are, respectively, adhesively bonded to a second sheet at strengths less or greater than the uniform strength and having a marginal portion or tab extending beyond the first sheet. The composite sheet structure is fed into the nip of upper and lower peel rollers and upon passage therethrough a strip sheet roller is rotated into position to bend and hold the laminate against the upper peel roller in a position to fracture the tab from the first sheet. On reversal of the feed direction and passage of the laminate back through the nip of the strip sheet and upper peel rollers, the thicker "keeper sheet" of the flexed laminate breaks from the "throw-away" sheet containing the tab, at the preformed tab. A roller configuration and drive train structure are provided that provides a more predictable and repeatable steady state condition and allows for control of the location of the peel point to be accomplished.
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Schuh Dana F.
Silveira Frank S.
Tobin William P.
Ball Michael W.
Osele Mark A.
Polaroid Corporation
Xiarhos Louis G.
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