Overlay devices

Details Overlay devices Overlay devices

1983-09-20

1985-11-05

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Detailed holder for original

355 79, G03B 2762

Patent

active

045510156

ABSTRACT:
An automatic overlay device is disclosed having a web for carrying a multiplicity of overlays. Individual overlays can be extended over a photocopying area by drive motors. A sensor is provided for counting markings on the web to indicate the number of overlays on the web, the sensor issuing a signal and the overlay device having a non-volatile memory responsive to the signal from the counting sensor for storing information concerning the number of overlays. Controls on the automatic overlay device allow a user to select a desired overlay, the arrangement being such that the motors move the web to expose the desired overlay in response to a signal from the control and comparison of the signal from the controls with information stored in the non-volatile memory.

REFERENCES:
patent: 3259037 (1966-07-01), Wilkinson
patent: 3290987 (1966-12-01), James et al.
patent: 3490844 (1970-01-01), Sapp
patent: 3642370 (1972-02-01), Meredith et al.
patent: 3677146 (1972-07-01), Nielsen
patent: 3913118 (1975-10-01), Abrams
patent: 3993300 (1976-11-01), Dehner
patent: 4255047 (1981-03-01), Chevin et al.

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