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:
Sep. 18, 2012
Filed:
Jan. 26, 2010
Koichi Mihara, Osaka, JP;
Yasuyuki Ishiguro, Osaka, JP;
Koichi Mihara, Osaka, JP;
Yasuyuki Ishiguro, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In a developing device including a developing vessel for storing a developer, a first conveying passage, a second conveying passage, a first conveying member, a second conveying member and a developing roller, the first conveying member has a first rotary shaft and a first conveying blade formed on the periphery of the first rotary shaft, the first conveying blade has a first inner helical blade formed on the periphery of the first rotary shaft and a first outer helical blade arranged along the axis of the first rotary shaft and radially outside the outer periphery of the first inner helical blade, and the helical pitch of the first outer helical blade is specified to be shorter than the helical pitch of the first inner helical blade.