Projection unit for a light permeable original in a copying mach

Details Projection unit for a light permeable original in a copying mach Projection unit for a light permeable original in a copying mach

1990-04-09

1991-03-26

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Original moves continuously

355 67, G03B 2748, G03B 2750

Patent

active

050033441

ABSTRACT:
A projection unit, which is mounted in a copying machine and used to project an image of a light permeable original onto a prescribed exposure point on a photosensitive material, comprising a light source for exposure in a box, an original holding means which holds the original in a prescribed position with respect to the light source and the photosensitive material and is disposed movably in the box so that the image of the original is scanned in a prescribed direction with respect to the photosensitive material, a driving means for moving the original holding means in the scanning direction, a transmission means provided between the original holding means and the driving means which is capable of moving between an engaged position in that the transmission means is coupled to the original holding means and driving means so as to transmit power of the driving means to the holding means and a disengaged position in that the transmission means is not coupled to the original holding means and the driving means, and a switching means for putting the transmission means into the engaged position or disengaged position.

REFERENCES:
patent: 3982831 (1976-09-01), Kingsley
patent: 4015902 (1977-04-01), Betensky
patent: 4374618 (1983-02-01), Howard
patent: 4435077 (1984-03-01), Suzuki et al.
patent: 4702593 (1987-10-01), Detsch
patent: 4914470 (1990-04-01), Giosue

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