Back to results
US 4,049,348 AGranted
Photocopying apparatus
OwnerYves Cormierinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerYves Cormierinventor
Estimating the term…
In photocopying apparatus of the type in which the document to be copied is drawn to pass in front of an elongated exposure window extending transversely to the direction of passage, the window is constituted in a guide and support plate for the sheet to be copied. At least two long openings respectively on both sides of the window and parallel to the latter are each traversed by a front and rear roller respectively for driving the sheet, protruding a short height above the upper surface of the plate and extending in one or several sections, over substantially the whole width of the plate. The drive rollers cooperate by elastic pressure, with a "counterplate" arranged at a slight distance above the plate so as to constitute with it a flattened guide duct for the sheet to be copied, and presenting a smooth and slippery lower surface to the sheet. A finger protruding through a short longitudinal slot in the support plate against elastic pivoting means senses the passage of a sheet to be copied and actuates a microswitch to start the machine operations. The counterplate may be a thin transparent plate forming part of a removable guide and exposure carriage bearing a flexible cover sheet on one edge. This enables a page in a book to be copied.
Photocopying apparatus having an inlet end and an outlet end, said apparatus serving to duplicate open books and linearly traveling single sheets comprising a horizontally arranged guide plate, laterally spaced longitudinally extending guide means disposed adjacent to said guide plate, an exposure window associated with said guide plate, primary rotatable feed rollers spaced inwardly of said inlet end of said apparatus, secondary rotatable feed rollers in proximity to said exposure window, a linearly movable carriage element having oppositely disposed lateral edges, means associated with said longitudinally extending guide means adapted to engage said lateral edges of said carriage, carriage retention control means positioned in proximity to said outlet end of said apparatus, and microswitch means in proximity to said primary feed rollers serving to close a circuit to cause said primary and secondary rollers to begin rotation.
Dependencies are inferred from the claim text.