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:
Apr. 04, 2000
Filed:
Apr. 16, 1999
Takahiro Sasai, Kyoto, JP;
Akinori Nishizawa, Uji, JP;
Murata Kikai Kabushiki Kaisha, Kyoto, JP;
Abstract
A toner image formed on the photosensitive body (21) is transferred to printing paper by applying a voltage from a transfer roller (25) in an image transfer section of an image forming device (1). The transfer roller (25) is provided with a transfer voltage generating circuit (31) connected to a control unit (30). Information about an optimum transfer voltage is gathered from a look-up table (34) provided in a memory (33), in accordance with environmental conditions such as temperature and humidity in the device (1) which are detected by a sensor (35). The voltage to be applied to the transfer roller (25) is determined by the control unit (30). The voltage applied to the transfer roller between sheets of printing paper is also changed in accordance with the detected environmental conditions.