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US 5,706,728 AGranted
Printing apparatus
AssigneeRDP Marathon Inc.
InventorsMarcel Motard, Eric J. Short
Life of this patent
Estimating the term…
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AssigneeRDP Marathon Inc.
InventorsMarcel Motard, Eric J. Short
Estimating the term…
Interchangeable cassettes containing a blanket cylinder and a plate cylinder of varying circumferences can be located in a printing tower of an offset printing apparatus. An impression roller is journaled to a pair of sub-frame arms pivoted to the frame by means of a pivot shaft which extends through the gear side frame wall. The impression roller shaft extends through the gear side frame wall in an arcuate slot, and the impression gear meshes with the pivot shaft gear at all angles of displacement of the impression gear. A pivoting sub-frame includes exterior plates mounted to the pivot shaft and on the exterior of the frame walls. Hydraulic clamping devices can clamp the exterior sub-frame plates and the sub-frame arms to the frame wall.
In a printing apparatus for printing on a continuous web, a processing tower comprising a frame including a pair of upstanding parallel frame walls, a replaceable cassette having a pair of side walls insertable in the frame with the side walls of the cassette in the same respective planes as the frame walls, at least a processing cylinder of a predetermined circumference mounted in the cassette and extending between the side walls, a pair of pivotal sub-frame arms mounted to the frame with an arm adjacent each frame wall and adapted to rotate about a pivot axis extending laterally of the frame, an impression cylinder in the frame, on the opposite side of the web relative to the processing cylinder, extending between the frame walls and journaled to the sub-frame arms for angular displacement relative to the frame, and clamp means associated with the frame walls and the sub-frame arms to lock the sub-frame arms to the frame walls and thereby fix the impression cylinder relative to the frame and in tangential contact with the processing cylinder.
Dependencies are inferred from the claim text.