Metal inking roll for use in flexographic printing

Details Metal inking roll for use in flexographic printing Metal inking roll for use in flexographic printing

1995-11-07

1997-09-02

Schwartz, Larry I.

Roll or roller

With specific roller exterior surface structure

Surface projections, indentations, or slits

492 49, 82 111, 148222, 148233, 298953, F16C 1300

Patent

active

056625731

ABSTRACT:
Metal inking rolls, particularly for flexographic printing, having: A roll structure composed of an ammonia hardenable steel, in particular stainless steel, the selection of a roll wherein the minimum thickness of the wall, if tubular, is a direct function of the diameter and an inverse function of the length of the roll, so that, when the roll is supported at its ends and stressed in the middle, on a surface relatively distributed, it may be permanently distorted in the axial direction but without distorting its cross-section; a post-engraving ionic nitriding treatment to increase the surface hardness of the screen to at least 60 HRC and a final straightening step, to reduce the screen eccentricity at least 0.02 mm.

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