Charging and exposure section in an electrophotographic apparatus
AssigneeFuji Photo Film Co., Ltd.
InventorShuichi Ohtsuka
Life of this patent
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Abstract
In a charging and exposure section of an electrophotographic apparatus, a charging mask defining a charge area of an electrophotosensitive member charged by a charging unit is formed with a cut-out portion which is not exposed through an objective lens focusing the image of a picture carried by an original onto the electrophotosensitive member, so as to form a retrieval mark on a portion of the electrophotosensitive member. This retrieval mark is utilized for judging the condition of exposure on the electrophotosensitive member or for facilitating the picture image quality control.
Claims3
A charging and exposure section of an electrophotographic apparatus comprising an objective lens focusing the image of a picture carried by an original placed on a supporting table onto an electrophotosensitive member, a charging means disposed between said objective lens and said electrophotosensitive member for charging said electrophotosensitive member, an exposure mask disposed between said charging means and said electrophotosensitive member for defining an exposure area of said electrophotosensitive member, and a charging mask disposed between said exposure mask and said electrophotosensitive member for defining a charge area of said electrophotosensitive member, said charging mask having a cut-out portion extending outward beyond a marginal edge of said exposure mask.
Dependencies are inferred from the claim text.