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. 20, 2001
Filed:
Dec. 21, 1999
Kunio Shigeta, Hachioji, JP;
Yotaro Sato, Hachioji, JP;
Hisayoshi Nagase, Hachioji, JP;
Satoshi Haneda, Hachioji, JP;
Konica Corporation, , JP;
Abstract
A two-sided image forming apparatus includes: an image carrying member; a toner image forming device for forming a toner image on the image carrying member; a belt-shaped intermediate transfer body for conveying a transfer material, having a volume resistivity R (&OHgr;·cm) wherein the following expression is satisfied, 10,≦R<10,; a primary transferring device for transferring the toner image on the image carrying member onto the intermediate transfer body or a front face of the transfer material; and a secondary transferring device for transferring the toner image on the intermediate transfer body onto a rear face of the transfer material. The following expressions are satisfied, 0.2≦I(1B)/V≦0.7 and 0.6×I(1B)≦I(2)≦1.4×I(1B), where I(1B) (&mgr;A) represents an absolute value of a primary transfer current when the toner image on the image carrying member is transferred to the front face of the transfer material by the primary transferring device, I(2) (&mgr;A) represents an absolute value of a secondary transfer current when the toner image on the intermediate transfer body is transferred to the rear face of the transfer material by the secondary transferring device, and V (mm/sec) represents a moving velocity of the intermediate transfer body.