Foil for covering an impression cylinder

Details Foil for covering an impression cylinder Foil for covering an impression cylinder

1993-09-13

1995-03-14

Zimmerman, John

Stock material or miscellaneous articles

All metal or with adjacent metals

Having variation in thickness

428667, 428687, 101420, 101422, B41F 1300, B41N 700

Patent

active

053976517

ABSTRACT:
Foil for covering an impression cylinder of a rotary offset printing press for first-form and perfector printing is formed of a chemically and wear-resistant rigid support layer having good ink transfer behavior and having a structured surface with statistically uniformly distributed convex and concave structural elements thereon, and a microroughness-reducing chromium layer disposed on the rigid support layer and forming a sheet-guiding outer cylindrical surface of the impression cylinder, respective peaks being formed on the convex structural elements for supporting a sheet thereon, each of the convex structural elements having an oval shape with a radius of curvature increasing from the respective peak thereof to a transition into respective concave structural elements adjacent thereto.

REFERENCES:
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patent: 3874331 (1975-04-01), Kirsen
patent: 4005654 (1977-02-01), Gundlach
patent: 4327135 (1982-04-01), Wirz et al.
patent: 4688784 (1987-08-01), Wirz
patent: 5042383 (1991-08-01), Wirz
European Search Report, Dec. 30, 1993, EP 93 11 3247, 4 pages.

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