B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
270/21
B65H 5/36 (2006.01) B41F 21/00 (2006.01) B41F 22/00 (2006.01) B41N 7/00 (2006.01)
Patent
CA 1238347
HEIDELBERG A-410 14.06.1984 ABSTRACT The invention relates to a covering for sheet-carrying cylinders and drums in rotary offset printing presses for one-sided and two-sided printing. One surface of this covering is smooth and the opposite surface is textured whereby at least the carrying surfaces, which project from the textured surface, are intended for carrying the sheet and are preferably statistically uniformly distributed, consist of hydrophilic, chemically resistant and wear-resistant material. In such a covering the textured surface consisting of carrying surfaces and valleys is interrupted at several points by selectively provided penetrations. Either blow-air or suction air, as desired, can be applied to these penetrations. The use of such a covering on transfer drums, storage drums, turning cylinders, impression cylinders and sheet delivery drums guarantees the smear-free carrying of the printed sheets, even if the freshly printed side of the sheet comes to lie on the outer cylindrical surface of the cylinder or drum.
480972
Heidelberger Druckmaschinen Aktiengesellschaft
Johnson Douglas S. Q.c.
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