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:
May. 23, 2000
Filed:
Dec. 21, 1998
Sang-Yob Shin, Kyonggi-do, KR;
SamSung Electronics Co., Ltd., Suwon, KR;
Abstract
A method and apparatus for removing remaining toner from an image forming apparatus, when a non developing time is detected during a performing of printing, a supply voltage applied to a supplying roller is increased to a level higher than a developing voltage applied to a developing roller. When the supplying roller having the supplying voltage of a voltage level higher than the developing voltage is in contact with the developing roller, electric flux is directed from the supplying voltage having a high electric potential to the developing voltage having a low electric potential due to a difference of intensities of electric fields between the supplying roller and the developing roller, while toner having negative charge moves from the developing roller to the supplying roller in a reverse direction to that of the direction of the electric flux to remove the remaining toner.