Patent ID: 7040226
Filing Date: 2006-05-09
Classification: B41F,B41P

Abstract:
1. A printing unit comprising: at least a first printing group, said at least first printing group including a transfer cylinder; a second cylinder, said second cylinder cooperating with said transfer cylinder and defining a printing gap adapted to receive a web guided through said printing gap; a drive motor adapted to drive said transfer cylinder; means supporting at least one of said transfer cylinder and said second cylinder for movement between first, second, and third different positions, said first, second and third positions defining a disengagement path for one of said transfer cylinder and said second cylinder; a distance of said disengagement path increasing from said first position to said third position and being limited between said first and second positions in a direction toward a greater distance as a function of an operating parameter of a drive mechanism of the printing group; and stop selectively preventing movement of at least one of said transfer cylinder and said second cylinder to said third position, wherein in said first position, said transfer cylinder and said second cylinder are in contact, wherein in said second position, said transfer cylinder and said second cylinder are out of contact with each other, and wherein in said third position, said transfer cylinder and said second cylinder are out of contact and are spaced further apart than they are in the 2nd position whereby a web can be guided between them, without contact, during a printing operation.