Devices for automatically feeding an image projector

Details Devices for automatically feeding an image projector Devices for automatically feeding an image projector

1990-12-10

1991-10-22

Shoap, Allan N.

Optics: image projectors

Miscellaneous

353DIG5, 353DIG3, 353103, G03B 2302

Patent

active

050590200

ABSTRACT:
A device of the invention is associated with a projector including a horizontal platform on which document sheets are placed one after the other in order to project images thereof on a screen. The device includes two removable cassettes each fitted with levers carried by respective shafts actuated by respective electromagnets. Above the leading edge of each cassette there are two transverse shafts carrying return pulleys over which belts pass for driving the top document from a stack of documents in the cassette. The device includes a horizontal plate which is positioned in alignment with the platform of the projector. An application lies in projecting images during a lecture.

REFERENCES:
patent: 3574454 (1971-04-01), Deeg
patent: 4264158 (1981-04-01), Lindquist
patent: 4707092 (1987-11-01), Mindell
patent: 4756616 (1988-07-01), Min et al.

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