Multicolor rotary printing press
AssigneeKabushiki Kaisha Tokyo Kikai Seisakusho
InventorYuji Kohara
Life of this patent
Estimating the term…
Abstract
There is provided a mesh roller having small recesses defined in its peripheral surface and interposed between a fountain roller for picking up ink from an ink pan and inking rollers held in contact with a plate cylinder, the fountain roller being rotatable at a peripheral speed much lower than that of the plate cylinder. A pair of doctor blades actuatable for rotations in normal and reverse directions, respectively, is disposed in confronting relation to the mesh roller, and a means is provided for switching a system for driving the all cylinders into a normal or reverse operation mode.
Claims6
A multicolor rotary printing press rotatable selectively in a normal or reverse direction comprising:
- (a) a single impression cylinder;
- (b) a plurality of plate cylinders disposed around and held against said single impression cylinder for passing a web of print paper successively between said impression cylinder and said plate cylinders to effect multicolor printing on said web;
- and
- (c) ink supply means associated respectively with said plate cylinders, each of said ink supply means including:
- (1) a fountain roller rotatable at a peripheral speed lower than a peripheral speed of said plate cylinder for picking up ink from an ink pan;
- (2) inking rollers held in contact with said plate cylinder for supplying ink to said plate cylinder;
- (3) a mesh roller held against said inking rollers and rotatable at the same peripheral speed as that of said plate cylinder, said mesh roller being spaced slightly from said fountain roller and having minute recesses defined in a peripheral surface thereof;
- (4) a pair of first and second doctor blades disposed in symmetrical locations one on each side of a position in which said mesh roller is disposed adjacent to said fountain roller, and having distal ends confronting and pressable against said mesh roller;
- (5) switch means for independently displacing said doctor blades between a first position in which said doctor blades are pressed against said mesh roller and a second position in which said doctor blades are spaced from said mesh roller;
- (6) a system for driving all of said cylinders in the normal or reverse direction;
- and
- (7) clutch means for switching said system to rotate said cylinders selectively in the normal or reverse direction.
Dependencies are inferred from the claim text.