Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1986-09-05
1988-09-20
Braun, Fred L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 14CH, 355 14D, G03G 1502, G03G 1504, G03G 1506
Patent
active
047729198
ABSTRACT:
An electrophotographic copying machine adapted to provide a copied image for preparing a master plate for a thermal type stencil printing machine as well as a copied image for other, ordinary use. The copying machine includes an image forming device including a photosensitive member defining a photoconductive layer on a surface thereof, a charging device for charging the surface of the photosensitive member, an exposure device for illuminating an original image and forming on the photosensitive member an electrostatic latent image corresponding to the original image, and a developing device for causing a charged toner to electrostatically and selectively adhere to the electrostatic latent image on the photosensitive member. The copying machine further includes a transfer device for transferring the charged toner from the photosensitive member to copying paper, and an image density dropping device for selectively controlling the image forming device to cause a sharp drop in an image density on the copying paper with respect to a density of the original.
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patent: 4636063 (1987-01-01), Takai et al.
Oda Masataka
Yoshiyama Tsugihito
Braun Fred L.
Minolta Camera Kabushiki Kaisha
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