Covering for sheet-supporting cylinders and drums in rotary offset printing presses
AssigneeHeidelberger Druckmaschinen AG
InventorArno Wirz
Life of this patent
Estimating the term…
Abstract
A covering for sheet-supporting cylinders and drums on rotary offset printing machines for printing both on single and both sides of a sheet, the covering having a smooth surface on one side thereof and a textured surface on the opposite side thereof, with sheet-supporting surfaces projecting from the textured surface and formed of hydrophilic and chemically and wear-resistant material includes a device for defining perforations formed in the textured surface, and a device connected to the perforations for selectively applying blowing air and suction therethrough.
Claims24
Covering for sheet-supporting cylinders and drums on rotary offset printing machines for printing both on single and both sides of a sheet, the covering having a smooth surface on one side thereof and a textured surface on the opposite side thereof, with sheet-supporting surfaces projecting from the textured surface and formed of hydrophilic and chemically and wear-resistant material, comprising non-sheet supporting area disposed on the textured surface at the bottom of and forming valleys between the projecting surfaces, means defining perforations formed in the textured surface, and means connected to said perforations for selectively applying blowing air and suction therethrough.
Covering for sheet-supporting cylinders and drums on rotary offset printing machines for printing both on single and both sides of a sheet, the covering having a smooth surface on one side thereof and a textured surface on the opposite side thereof, with sheet-supporting surfaces projecting from the textured surface and formed of hydrophilic and chemically and wear-resistant material, comprising means defining perforations formed in the textured surface, and means connected to said perforations for selectively applying blowing air and suction therethrough, the covering being formed as a glass-bead blanket.
Dependencies are inferred from the claim text.