Patent ID: 6050188
Filing Date: 2000-04-18
Classification: B41F,B41P

Abstract:
A sheet-fed offset rotary printing press for multi-color printing comprising:a central impression cylinder;a first printing cylinder having a first diameter;at least two first printing cylinder print areas on said first printing cylinder;a first blanket cylinder in engagement with said central impression cylinder and with said first printing cylinder, said first blanket cylinder having a second diameter equal to said first diameter;at least two first blanket cylinder print areas on said first blanket cylinder;a first number of controlled gripper systems on said central impression cylinder, said first number of controlled gripper systems on said central impression cylinder being greater than said number of first printing cylinder and said first blanket cylinder print areas;a second printing cylinder having at least two second printing cylinder print areas;a second blanket cylinder in engagement with said central impression cylinder and with said second printing cylinder and having at least two second blanket cylinder print areas;a separate short inking unit associated with each of said at least two first print areas on said first printing cylinder and each of said at least two second print areas on said second printing cylinder; anda chamber doctor blade, a screen roller receiving ink from said chamber doctor blade and at least one ink application roller in each of said separate short inking units, said at least one ink application roller in each of said separate short inking units being in constant contact with said associated screen roller in each said separate short inking unit and being alternatingly positionable against and removable from contact with said associated one of said at least two print areas on said associated one of said first and second printing cylinders during each rotation of said associated one of said first and second printing cylinders.