Patent ID: 6314881
Filing Date: 2001-11-13
Classification: B41F

Abstract:
A printing group for a printing press comprising a plate cylinder, a blanket cylinder operatively coupled to the plate cylinder and having two end faces each of which has a conical bearer ring with the bearer rings on the blanket cylinder each having conical surfaces with the same conical angle and inclined in the same direction as each other, a further cylinder having two conical bearer rings each having conical surfaces with the same conical angle as the conical angle of the bearer rings of the blanket cylinder and inclined in an opposite direction from the direction of inclination of the conical surfaces of the bearer rings of the blanket cylinder, means for applying pressure to the blanket cylinder so that the conical bearer rings of the blanket cylinder roll onto the conical bearer rings of the further cylinder under pressure, and a plurality of gears, each for driving a respective one of the cylinders, wherein one of the cylinders is a driving cylinder and least one of the other cylinders is a driven cylinder, and the bearer rings of the driving cylinder have a rolling-contact diameter that is smaller than a rolling-contact diameter of the bearer rings on the driven cylinder, and each of the gears have the same number of teeth so that a frictional force exists between the bearer rings for eliminating tooth play.