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:
Jun. 23, 2009
Filed:
Dec. 22, 2005
Ryota Inoue, Numazu, JP;
Shigeru Emoto, Numazu, JP;
Yohichiroh Watanabe, Fuji, JP;
Naohiro Watanabe, Sunto-gun, JP;
Masahide Yamada, Numazu, JP;
Akinori Saitoh, Numazu, JP;
Masahiro Ohki, Numazu, JP;
Tsunemi Sugiyama, Yokohama, JP;
Ryota Inoue, Numazu, JP;
Shigeru Emoto, Numazu, JP;
Yohichiroh Watanabe, Fuji, JP;
Naohiro Watanabe, Sunto-gun, JP;
Masahide Yamada, Numazu, JP;
Akinori Saitoh, Numazu, JP;
Masahiro Ohki, Numazu, JP;
Tsunemi Sugiyama, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The object of the present invention is to provide a toner having a uniform composition of toner materials among toner particles, excelling in charge stability, enabling high-quality images without substantially causing fog and toner scattering, and having a small diameter and a narrow particle size distribution. The present invention also provides an effective production method of the toner, and an image forming method and the like using the toner. For this end, the present invention provides a method for producing a toner in which a dissolved and dispersed solution of toner materials is dispersed as dispersion particles in an aqueous medium containing no organic resin fine particles to prepare an oil droplet-in-water dispersion, and organic resin fine particles are added to the oil droplet-in-water dispersion to thereby granulate a toner in the presence of the organic resin fine particles.