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. 09, 2011
Filed:
Jun. 12, 2008
Ryouji Kouno, Aichi-ken, JP;
Hiroshi Goto, Aichi-ken, JP;
Ryouji Kouno, Aichi-ken, JP;
Hiroshi Goto, Aichi-ken, JP;
Konica Minolta Business Technologies, Inc., Chiyoda-Ku, Tokyo, JP;
Abstract
An image forming apparatus has a pair of spacedly opposed first and second bearing members, in which a powder developer material is moved from the first bearing member to the second bearing member. The apparatus also has an electric field generator. The generator forms an electric field between the first and second bearing members and outputs a first voltage and a second voltage alternately. The first voltage generates, between the first and second bearing members, a first electric field electrically forcing the developer material from the first bearing member toward the second bearing member. The second voltage generates between the first and second bearing members a second electric field electrically forcing the developer material from the second bearing member toward the first bearing member. Durations of the first and second voltages are determined so that the developer material forced out of the first bearing member due to the first electric field is forced back from the second bearing member toward the first bearing member due to the second electric field to impinge the developer material retained on the first bearing member and thereby flick the developer material on the first bearing member away therefrom and the flicked developer material is then forced from the first bearing member toward the second bearing member by the subsequent first electric field.