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:
Mar. 01, 1994
Filed:
Mar. 03, 1992
Nagata Tetsuya, Hitachi, JP;
Umeda Takao, Mito, JP;
Takuma Yasuo, Hitachi, JP;
Igawa Tatsuo, Kitaibaraki, JP;
Yamada Masato, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
In an image formation apparatus, a drum tuck prevention element prevents a cut paper, which is a transfer material, which is an image holding means, from being wound on a photosensitive drum with an electrostatic state. The drum tuck prevention element detects, according to various physical information, the occurrence of a drum tuck. The drum tuck prevent element includes a tuck estimation judgment element which produces drum tuck prevention control information in response to the physical information. The physical information can be selected from a digital data for exposing the drum, temperature and humidity data obtained by detection in an area surrounding of an apparatus main body, data for indicating a residual amount of a development element, data for detecting an electrostatic latent image formed on the drum and data for indicating a visual image formed on a surface of the drum.