Patent ID: 7127192
Filing Date: 2006-10-24
Classification: G03G

Abstract:
1. A process cartridge detachably mountable on an electrophotographic image forming apparatus main body, said process cartridge comprising: an electrophotographic photosensitive drum; a developing roller configured and positioned to develop an electrostatic latent image formed on said electrophotographic photosensitive drum, by use of developer; a magnetic seal member configured and positioned to prevent by a magnetic force of said magnetic seal member the developer from leaking from a lengthwise end portion of said developing roller; a developer containing portion containing the developer to be used to develop the electrostatic latent image; a first frame member made of resin and having a developer supplying opening provided to supply the developer from said developer containing portion to said developing roller; a second frame member made of resin and joined to said first frame member by molten resin; an attachment portion provided astride of said first frame member and said second frame member across a joint portion at which said first frame member and said second frame member are joined together; and a resin reservoir configured to store said molten resin to prevent said molten resin from leaking out from said joint portion when said first frame member and said second frame member are joined together, said resin reservoir extending from said joint portion to said attachment portion on a side of said first frame member, and said resin reservoir being covered with said magnetic seal member attached to said attachment portion.