Title: Magnetic brush developer device

Abstract: A magnetic brush developing device for a xerographic copying machine is constructed to prevent toner from being leaked out of the developer housing. A magnetic brush roll is provided opposite to a photosensitive member, and at least one air current blade is provided along the lower outer periphery of the surface of the magnetic brush roll. One end of the air current blade is closely adjacent the surface of the photosensitive member, and the other end of the air current blade projects back toward the interior of the developer housing. An air circulating path is defined between the air current blade and the lower outer wall of the developer housing. This air circulating path is effective to conduct entrained air carrying excess toner back into the developer housing.

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Inventors: Tsukamoto, Takuzo (Ebina, JP)
Sakamoto, Tamotsu (Ebina, JP)
Okamoto, Yoshikazu (Ebina, JP)

Application Number: 846655
Filing Date: 1977-10-28
Publication_date: 1980-03-25
Assignee: Fuji Xerox Co., Ltd. (Tokyo, JP)
Primary Class(es): 399/103 399/119, 430/122
Other Classes:
US Patent Ref:

3367306	Feb, 1968	Lawes et al.	118/655.
3663291	May, 1972	Royka	118/655.
3745905	Jul, 1973	Kobayashi	355/15.
3754526	Aug, 1973	Caudill	118/658.
3795222	Mar, 1974	Jugle et al.	118/655.
3863603	Feb, 1975	Buckley et al.	118/657.
3872828	Mar, 1975	Hartwig et al.	118/655.
3977361	Aug, 1976	Nagashima et al.	118/658.
4026241	May, 1977	Takebe et al.	118/653.
4033293	Jul, 1977	Ohmori et al.	118/656.

Other Refs:
Primary Examiner: Stein, Mervin
Assistant Examiner:
Attorney: Sughrue, Rothwell, Mion, Zinn and Macpeak