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. 11, 2006
Filed:
Oct. 28, 2003
Sayaka Fujita, Kashihara, JP;
Katsuru Matsumoto, Nara, JP;
Toshihiko Murakami, Kashiba, JP;
Eiji Tenjiku, Osaka, JP;
Sayaka Fujita, Kashihara, JP;
Katsuru Matsumoto, Nara, JP;
Toshihiko Murakami, Kashiba, JP;
Eiji Tenjiku, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka-fu, JP;
Abstract
The master comprises a polyester resin as a binder resin and a carbon black as a colorant having a primary particle size of 10 nm to 100 nm, is blended with 30 to 60 parts by weight of the carbon black, has a lightness L* of 20 or more; and the reflectance A at 400 nm thereof and the reflectance B at 700 nm thereof fall within the range satisfying the relation given by the following formula [1]:0.5<<5[1] The carbon black in the toner can be made to be present stably in the conditions such that the carbon black has a small primary particle size and is homogeneously dispersed.