Method and system for automatically matching the format of the p

Details Method and system for automatically matching the format of the p Method and system for automatically matching the format of the p

1977-08-29

1979-01-23

Hix, L. T.

Photocopying

Projection printing and copying cameras

With film severing

355 41, 355 77, 355 74, 355 75, 355 56, G03B 2900, G03B 2752, G03B 2734, G03B 2758

Patent

active

041358104

ABSTRACT:
A web of copying material is transported on-edge through an exposure-station web guidance system provided with a masking system which includes stationary and shiftable transverse-edge framing plates. The projected image of a first longitudinal-edge reference line on the copy table supporting the original is brought into register with a corresponding reference line of the masking system. The projection scale is adjusted to cause the format-breadth of the projected image to be at most slightly smaller than the format breadth of the web, but in no event greater. The projected image of the first transverse edge of the original is brought into register with the edge of the stationary framing plate, and then that of the second transverse edge with that of the shiftable framing plate. This registration is effected by sensing infrared-light images of the dark-light transitions associated with the transverse edges of the original. An exposure is performed. Before transporting the exposed section of web out of the exposure station, a cutting mark is provided by a perforator on the shiftable framing plate, and this cutting mark is thereafter detected by a detector on the stationary framing plate and triggers a severing operation.

REFERENCES:
patent: 3689143 (1972-09-01), Case et al.
patent: 3737227 (1973-06-01), Harter et al.
patent: 3792926 (1974-02-01), Knechtel et al.

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