Photocopying – Contact printing – Light boxes
Patent
1990-12-11
1992-12-01
Pendegrass, Joan H.
Photocopying
Contact printing
Light boxes
355 50, 358496, G03G 1500, G03G 1504
Patent
active
051683105
ABSTRACT:
An image reading apparatus is provided with a transparent plate horizontally disposed on which an image reading operation is performed, and a transporting device disposed above the transparent plate for transporting an original sheet to the transparent plate. The transporting device includes a pressure roller for pressing the original sheet onto an upper surface of the transparent plate at a pressure applying position and transporting the original sheet along the upper surface of the transparent plate. The image reading apparatus is also provided with a light source disposed below the transparent plate for illuminating through the transparent plate a portion of the transported original sheet. The illuminated portion of the original sheet is positioned on the upper surface of the transparent plate at an upstream side of the pressure applying position with respect to a transporting direction of the original sheet. The image reading apparatus is further provided with a detecting device for detecting through the transparent plate a reflection light from the illuminated portion of the original sheet.
REFERENCES:
patent: 3806239 (1974-04-01), Inoue et al.
patent: 4259711 (1981-03-01), Mochizuki
patent: 4380389 (1983-04-01), Kingsley
patent: 4429866 (1984-02-01), Castro-Hahn
patent: 4933722 (1990-06-01), Fujiwara
patent: 4970606 (1990-11-01), Shima
Hayashi Tatsushi
Takahashi Kozo
Conlin David G.
O'Connell Robert F.
Pendegrass Joan H.
Sharp Kabushiki Kaisha
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