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. 18, 2011
Filed:
May. 15, 2007
Seok-hoon Choi, Suwon-si, KR;
Sang-deok Kim, Gwangmyeong-si, KR;
Duck-hee Lee, Seoul, KR;
Ki-won Seok, Suwon-si, KR;
Seok-hoon Choi, Suwon-si, KR;
Sang-deok Kim, Gwangmyeong-si, KR;
Duck-hee Lee, Seoul, KR;
Ki-won Seok, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A non-magnetic one-component electrophotographic developing agent is provided having improved properties. The electrophotographic developing agent includes parent toner particles comprising a binder resin, a releasing agent, a colorant, and a charge control agent, and an external additive which is added to a surface of the parent toner particles, wherein the binder resin comprises a high viscosity polyester resin having a weight average molecular weight of about 90,000-140,000 and a gel content of less than about 5% and a low viscosity polyester resin having a weight average molecular weight of about 52,000-65,000 and a gel content of less than about 2%. According to an embodiment of the present invention, an electrophotographic developing agent having improved image gloss and fusing property, while ensuring durability may be prepared by using a blended combination of a high viscosity polyester resin and a low viscosity polyester resin.