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. 03, 1990
Filed:
Apr. 15, 1988
Shunichi Chiba, Numazu, JP;
Satoru Inoue, Mishima, JP;
Akio Matsui, Numazu, JP;
Yoshihisa Okamoto, Fuji, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An electrographic process comprising the steps of forming latent electrostatic images on a photoconductive material, developing the latent electrostatic images with a toner to toner images, transferring the toner images to a recording sheet, fixing the toner images to the recording sheet by causing the toner image bearing recording sheet to pass between a heat application roller coated with a fluorine-containing resin and a pressure application roller for fixing to the toner images to the recording sheet, in which electrographic process the rheological characteristics of the toner are such that the loss tangent (tan .delta.), which is a ratio of the loss moldus (G') to the storage modulus (G') of the toner, is in the range of 1.70 to 3.00 when the storage modulus (G') is 10.sup.5 dynes/cm.sup.2, namely