B - Operations – Transporting – 41 – N
Patent
B - Operations, Transporting
41
N
B41N 3/03 (2006.01) B22D 11/00 (2006.01) B32B 15/01 (2006.01) B41N 1/08 (2006.01) B21B 1/38 (2006.01) B23K 35/02 (2006.01) B23K 35/28 (2006.01)
Patent
CA 2057785
ARC-GRAINED LITHOPLATE AND TWO-STEP METHOD FOR MAKING IT ABSTRACT OF THE DISCLOSURE An essentially flat "arc-grained" surface of a sheet of aluminum alloy is produced with a coarse and non-uniform microstructure which, after it is coated with a durable phosphate-free coating, provides excellent lithoplate. Though such arc-grained microstructure is much coarser than an electrochemically etched surface typically used on litho- plate, the very coarse surface is peculiarly well-adapted to provide durable lithoplate after it is coated with a phosphate-free protective surface. After the coated surface is coated with a photoresist the excellent resolution of prints is maintained over a large number of repeated uses in an off-set printing press. A method of producing lithoplate comprises, controlledly rastering an A-C, or D-C reverse polarity plasma-generating electric arc on an aluminum sheet less than 30 mils thick, kept distortion-free on a mounted surface such as on a cylindrical drum; then coating the arc- grained surface with a hard and durable, inert phosphate- free coating while maintaining a capillary microstructure in the surface adapted to provide a support for a photoresist for use in lithographic printing of adequate resolution.
Pajerski A. Victor
Patrick Edward P.
Aluminum Company Of America
Smart & Biggar
LandOfFree
Arc-grained lithoplate and two-step method for making it does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Arc-grained lithoplate and two-step method for making it, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arc-grained lithoplate and two-step method for making it will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1508588