Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1993-04-06
1994-11-22
Barry, Chester T.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
430269, 430308, 239127, 156905, 1562724, B32B 3100
Patent
active
053665848
ABSTRACT:
Uncured emulsion is effectively washed from a stencil in the production of photomasks by mounting a drum rotatable about a horizontal axis within a portable cabinet. The drum is driven by a small (e.g. variable speed 1/16 HP) electric motor and spins at about 50-100 rpm. Water is sprayed onto the stencil mounted on the drum at about 80 psi by 4-10 V-jet nozzles. Liquid running off the stencil is collected by a catch basin mounted just below the drum, and passes through a drain pipe with strainer into a heat insulated holding tank with an electric resistance heating element, and is recirculated from the tank to the spray nozzles-by a high pressure pump. The pump and motor are controlled by a timer, and after completion of the washing cycle the stencil is removed from the cabinet.
REFERENCES:
patent: 3915832 (1975-10-01), Rackus et al.
patent: 4004782 (1977-01-01), Jeppsen
patent: 4253910 (1981-03-01), Mason et al.
patent: 4720330 (1988-01-01), Shabrang et al.
patent: 4985111 (1991-01-01), Ketelhohn
Willis Randy S.
Zukowski Raymond L.
Barry Chester T.
Rayzist Photomask Inc.
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