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:
Jan. 07, 1997
Filed:
Jun. 22, 1995
Mitsuyoshi Uehara, Nagoya, JP;
Hideo Yoshihara, Toki, JP;
Tsutomu Suzuki, Nagoya, JP;
Fumio Morita, Nagoya, JP;
Hiroshi Igarashi, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An image forming unit includes structure to prevent leakage of initial developer containing magnetic carrier and magnetic toner from a case. The image forming unit includes a photoconductive drum, a developing sleeve, and a trimming blade. Auxiliary sealing members are attached to the opposite ends of the trimming blade to stop up gaps between side sealing members in sliding contact with the opposite ends of the developing sleeve, and a protective sheet is removably inserted in the gap between the developing sleeve and the trimming blade. Ferromagnetic strips capable of being magnetized by the magnet roller are attached to the reverse side of the protective sheet at the opposite sides of one end of the protective sheet. The ferromagnetic strips magnetically attract the developer that is about to leak through the gaps to completely prevent leakage of the developer.