Three-part plate cylinder with lateral and circumferential adjustments for registration
AssigneeKabushiki Kaisha Tokyo Kikai Seisakusho
InventorsNoriyuki Shiba, Yuko Tomita
Life of this patent
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Abstract
A web-fed, multicolor, offset printing press having a plurality of printing units for printing different-color images on a continuous web of paper. Each printing unit includes a three-part plate cylinder rotatably supported between a pair of confronting framing walls. The plate cylinder is split into three parts which each have two newspaper pages width. The three parts of the plate cylinder are each capable of adjustable displacement both laterally and circumferentially of the plate cylinder for registration. Lateral and circumferential adjustments for the three parts of the plate cylinder are all mounted outside the framing walls.
Claims11
In a web-fed printing press having a series of printing units for printing images on a continuous web of paper or like material, a three-part plate cylinder apparatus included in each such printing unit and comprising:
- (a) a pair of confronting framing means;
- (b) a plate cylinder rotatably supported between the pair of framing means and split into three parts the three parts of the plate cylinder being capable of independent displacement both laterally and circumferentially for registration;
- (c) drive means for jointly driving the three parts of the plate cylinder during printing;
- (d) lateral adjustment means mounted outside the framing means and coupled to the three parts of the plate cylinder for causing lateral displacement of each part independently of the other parts;
- (e) circumferential adjustment means mounted outside the framing means and coupled to the three parts of the plate cylinder for causing circumferential displacement of each part independently of the other parts;
- and
- (f) wherein the displacement of each plate cylinder part in either of the lateral and circumferential directions does not affect its position in the other direction.
In a web-fed printing press having a series of printing units for printing images on a continuous web of paper or like material, a three-part plate cylinder apparatus included in each such printing unit and comprising:
- (a) a first and a second spaced-apart framing means;
- (b) a plate cylinder rotatably supported between the pair of framing means, the plate cylinder being divided into a center part and a first and a second end part which are slidably engaged with one another for independent lateral and circumferential displacement, the plate cylinder center part having a first and a second trunnion coaxially extending in opposite directions therefrom through the first and the second framing means, respectively, the plate cylinder first end part having a first hollow shaft coaxially extending therefrom through the first framing means and in sliding engagement with the first trunnion of the plate cylinder center part, the plate cylinder second end part having a second hollow shaft coaxially extending therefrom through the second framing means and in sliding engagement with the second trunnion of the plate cylinder center part;
- (c) drive means coupled to one of the trunnions of the plate cylinder center part and to the first and the second hollow shaft of the plate cylinder first and second end parts for jointly driving the center part and first and second end parts of the plate cylinder during printing;
- (d) plate cylinder center part circumferential adjustment means coupled to either of the first and the second trunnion of the plate cylinder center part on the outside of either of the first and the second framing means for causing circumferential displacement of the plate cylinder center part relative to the plate cylinder first and second end parts;
- (e) plate cylinder center part lateral adjustment means coupled to either of the first and the second trunnion of the plate cylinder center part on the outside of either of the first and the second framing means for causing lateral displacement of the plate cylinder center part relative to the plate cylinder first and second end parts;
- (f) plate cylinder first end part circumferential adjustment means coupled to the first hollow shaft on the outside of the first framing means for causing circumferential displacement of the plate cylinder first end part relative to the plate cylinder center part and second end part;
- (g) plate cylinder first end part lateral adjustment means coupled to the first hollow shaft on the outside of the first framing means for causing lateral displacement of the plate cylinder first end part relative to the plate cylinder center part and second end part;
- (h) plate cylinder second end part circumferential adjustment means coupled to the second hollow shaft on the outside of the second framing means for causing circumferential displacement of the plate cylinder second end part relative to the plate cylinder center part and first end part;
- (i) plate cylinder second end part lateral adjustment means coupled to the second hollow shaft on the outside of the second framing means for causing lateral displacement of the plate cylinder second end part relative to the plate cylinder center part and first end part;
- and
- (j) wherein the displacement of each plate cylinder part in either of the lateral and circumferential directions does not affect its position in the other direction.
Dependencies are inferred from the claim text.