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:
Aug. 28, 2007
Filed:
Apr. 10, 2006
Hideki Sugiura, Fuji, JP;
Satoshi Mochizuki, Numazu, JP;
Yasuaki Iwamoto, Numazu, JP;
Yasuo Asahina, Numazu, JP;
Hisashi Nakajima, Numazu, JP;
Tomoyuki Ichikawa, Numazu, JP;
Shinya Nakayama, Numazu, JP;
Masayuki Ishii, Numazu, JP;
Tomoko Utsumi, Ebina, JP;
Koichi Sakata, Numazu, JP;
Hideki Sugiura, Fuji, JP;
Satoshi Mochizuki, Numazu, JP;
Yasuaki Iwamoto, Numazu, JP;
Yasuo Asahina, Numazu, JP;
Hisashi Nakajima, Numazu, JP;
Tomoyuki Ichikawa, Numazu, JP;
Shinya Nakayama, Numazu, JP;
Masayuki Ishii, Numazu, JP;
Tomoko Utsumi, Ebina, JP;
Koichi Sakata, Numazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The object of the present invention is to provide a toner which has sufficiently high chargeability and less toner spent to a carrier or the like even when several tens of thousands of image sheets are output, is capable of keeping high-charge property and flowability without causing substantial background smear or toner fogging, excels in low-temperature fixing property and hot-offset property, and has a wide range of fixing temperature as well as to provide a developer, an image forming apparatus, a process cartridge, and an image forming method using the toner for developing electrostatic images. The toner of the present invention comprises a colorant, and a resin, and a fluoride compound, in which the fluoride compound exists on the surfaces of toner particles, and the atomic number ratio (F/C) of fluoride atoms to carbon atoms existing on the surfaces of the toner particles is 0.010 to 0.054.