The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 1988
Filed:
Sep. 05, 1986
Tsugihito Yoshiyama, Toyohashi, JP;
Masataka Oda, Toyohashi, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
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.