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. 21, 2020
Filed:
Apr. 03, 2018
Fuji Xerox Co., Ltd., Tokyo, JP;
Makoto Kamisaki, Kanagawa, JP;
Naoki Ota, Kanagawa, JP;
Tatsuhiro Igarashi, Kanagawa, JP;
Yasuhisa Morooka, Kanagawa, JP;
Jun Sekiya, Kanagawa, JP;
FUJI XEROX CO., LTD., Tokyo, JP;
Abstract
An image forming apparatus includes an image carrier that includes a conductive substrate, and a photosensitive layer and a surface protection layer; a developing device that includes an electrostatic image developer containing a toner, and develops the electrostatic image to form a toner image. The toner contains an amorphous polyester resin and has a weight average molecular weight Mw in a range of from 25,000 to 60,000, and a ratio of the weight average molecular weight Mw to a number average molecular weight Mn (Mw/Mn) is in a range of from 5 to 10. In the toner, a ratio of an absorbance for a wavelength of 1500 cmto an absorbance for a wavelength of 720 cmis 0.6 or less, and a ratio of an absorbance for a wavelength of 820 cmto the absorbance for a wavelength of 720 cmis 0.4 or less.