Sheet-guiding impression-cylinder casing profile

Details Sheet-guiding impression-cylinder casing profile Sheet-guiding impression-cylinder casing profile

1993-03-08

1994-09-06

Eickholt, Eugene H.

Printing

Flexible-sheet-securing devices

101420, 492 30, B41F 128

Patent

active

053438078

ABSTRACT:
An improved surface casing for a sheet-guiding printing cylinder comprising a number of elevations having constant cross-sectional areas extending radially therefrom to form a sheet bearing surface. The constant cross-sectional area over the length of the elevations ensures that as the elevations are worn down over time, the overall bearing area does not increase. As a result, smearing of the printing image, which is related to the total bearing area, does not increase over time. Additionally, the total bearing area does not increase for sheets having a low paper weight due to sagging of the sheet between the elevations.

REFERENCES:
patent: 3599306 (1971-08-01), Brafford
patent: 4327135 (1982-04-01), Wirz et al.
patent: 4688784 (1987-08-01), Wirz
patent: 5042383 (1991-08-01), Wirz

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