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:
Jan. 07, 2003
Filed:
Aug. 03, 2001
Megumi Aoki, Itami, JP;
Masahide Inoue, Suita, JP;
Yoshihiro Mikuriya, Nishinomiya, JP;
Masayuki Hagi, Mino, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
The present invention provides a color toner for developing an electrostatic image having excellent light transmission for OHP and fixing efficiency, said color toner effectively preventing a low temperature offset and a high temperature offset when it is applied to a fixing device whose coating weight of an oil is reduced. The color toner is characterized in that (i) it comprises a binding resin and a colorant, (ii) its storage elastic modulus at 90° C. (G′ ) is not more than 6×10 Pa, (iii) its storage elastic modulus at 140° C. (G′ ) is not less than 5×10 Pa, (iv) a temperature showing a maximum value of &dgr; in tan&dgr;=G″/G′ (wherein G′ is a storage elastic modulus of the color toner, and G″ is a loss elastic modulus of the color toner) exists in the range of 90-120° C., and (v) the maximum value of &dgr; is not less than 60°.