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:
Feb. 19, 2008
Filed:
Oct. 14, 2005
Tsutomu Nagata, Kyotanabe, JP;
Takahiko Kimura, Ikoma, JP;
Tsutomu Nagata, Kyotanabe, JP;
Takahiko Kimura, Ikoma, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A developing device is arranged such that Dg<ds<3Dg, and 3Dg<dc<6Dg, where ds is an end gap, Dg is an upstream gap, and dc is a center gap. The gap ds is a gap between a developer tankand either end portion of a developing rollerin the downstream of a transportation direction of the developing roller. The end portion of the developing rolleris an end portion thereof with respect to a rotation direction of the developing roller. The gap Dg is a gap between the developing rollerand a doctor blade. The gap dc is a smallest gap between the developer tankand the center portion b of the developing roller. With this arrangement, it is possible to prevent the toner scattering appropriately in the developing device for use of a two-component developer containing toner and carrier.