Metal working – Method of mechanical manufacture – Roller making
Patent
1995-03-20
1996-08-27
Cuda, Irene
Metal working
Method of mechanical manufacture
Roller making
2989521, 2989522, 492 30, 492 31, 492 54, B23P 1500
Patent
active
055488978
ABSTRACT:
A method of fabricating a lightweight ink transfer roll adapted for use in a flexographic printing apparatus. The roll comprises an aluminum body member having a cylindrical outer surface, tubular opposite end portions, and a solid medial portion which forms a mid span stiffener in the roll. An aluminum header is fixed in each of the tubular end portions, and each of the headers has an inner end surface which is spaced from the solid medial portion of the body member so as to leave an open void therebetween. An outer covering layer, of for example aluminum oxide or a flame sprayed ceramic, overlies the outer cylindrical surface of the body member, and a plurality of ink metering cells are formed in the outer covering layer. In one embodiment the method of fabricating the roll includes the steps of removing material from each of the ends of a metallic solid base roll so as to form tubular opposite end portions, and assembling a header in each of the tubular opposite end portions. A corrosion barrier coating and a layer of flame sprayed ceramic are applied to the outer surface of the roll, and ink metering cells are then laser engraved into the ceramic layer.
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