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.

Date of Patent:
May. 22, 2012

Filed:

Aug. 10, 2009
Applicant:

Kei Wakayama, Osaka, JP;

Inventor:

Kei Wakayama, Osaka, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/08 (2006.01);
U.S. Cl.
CPC ...
Abstract

To a lower part of a housingof a development unit, a coveris detachably fitted by using snap fittingsTo a fitting surfaceof the housingand a fitting surfaceof the cover, spongesand, respectively, are attached and fixed all around them. In a state in which the snap fittingsare engaged and thereby the housingand the coverare fixed to each other, the spongesandare in contact with each other and compressed, whereby air-tightness of a fitting partis secured.


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