Photocopying – Projection printing and copying cameras – Step and repeat
Patent
1987-10-09
1989-08-08
Hayes, Monroe H.
Photocopying
Projection printing and copying cameras
Step and repeat
355 75, 355 95, G03B 2742, G03B 2704, G03B 2762
Patent
active
048557935
ABSTRACT:
A step and repeat system which does not require restripping of an image to reposition it either vertically or horizontally. The image is secured to a substrate which is provided with two holes spaced a distance apart equal to the desired horizontal stepping distance. The substrate, with or without stripping tabs, is secured to fraction spacers having two base pins which fit in uniformly spaced holes on a horizontal stepping strip and having fraction pins which can be selected to precisely match the horizontal stepping distance. The horizontal stepping strip with attached substrate and image can be vertically repositioned on a step and repeat board to a second spaced vertical position with the use of interfacing holes on the stepping strip and the step and repeat board, register control being maintained with vertical position pins sized to match the holes. Horizontal stepping can be achieved with a change in fraction spacers. The apparatus and procedure enables the use of a single horizontal stepping strip which does not have to be separately punched and which can be reused. It enables the accurate movement of images to any location on the step and repeat board without restripping.
REFERENCES:
patent: 3494697 (1970-02-01), Nygaard
patent: 3621582 (1971-11-01), Radencic
patent: 3695760 (1972-10-01), Orr
Chesley F. Carlson Company
Hayes Monroe H.
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