Image forming apparatus to which a process cartridge having a part connecting member is detachably mountable, process cartridge having a part connecting member, and part connecting member

A process cartridge detachably mountable to a main body of an image forming apparatus, said process cartridge comprising:

• an electrophotographic photosensitive drum;
• process means for acting of said electrophotographic photosensitive drum;
• and
• a frame made by joining a plurality of molded pieces for supporting said electrophotographic photosensitive drum or said process means,
• wherein said frame has a construction in that at least two molded pieces obtained by injection molding of plastic are provisionally connected by being adjacently arranged or abutted against each other, the provisionally connected molded pieces are set in dies which are different from a die used for formation of each of the molded pieces, and a molten resin is injected into a gap formed between opposed surfaces of the molded pieces that are adjacently arranged or abutted against each other to connect the molded pieces, and wherein an injection channel for the molten resin up to the gap is formed in one of the molded pieces forming the gap of the opposed surfaces that are adjacently arranged or abutted against each other, and
• wherein a rib for stopping the molten resin is provided in the injection channel to stop the flow of the molten resin injected into said injection channel.

A process cartridge detachably mountable to a main body of an image forming apparatus, said process cartridge comprising:

• an electrophotographic photosensitive drum;
• process means for acting on said electrophotographic photosensitive drum;
• and
• a frame member made by joining a plurality of molded pieces for supporting said electrophotographic photosensitive drum or said process means,
• wherein said frame member has a construction in that at least two kinds of frames including a first frame and a second frame, both being molded pieces, are provisionally connected so as to be adjacently arranged or abutted against each other by a third frame and a fourth frame, both being molded pieces, at side faces of the first and second frames on one end side and the other end side, the provisionally connected frames are set in dies which are different from a die used for formation of each of the molded pieces, and a molten resin is injected into a gap formed between opposed surfaces of the molded pieces that are adjacently arranged or abutted against each other to connect the molded pieces, wherein an injection channel for the molten resin up to the gap is formed in the third frame and the fourth frame, and wherein a rib for stopping the molten resin is provided in the injection channel to stop the flow of the molten resin injected into the injection channel.

A process cartridge detachably mountable to a main body of an image forming apparatus, said process cartridge comprising:

• an electrophotographic photosensitive drum;
• process means for acting of said electrophotographic photosensitive drum;
• and
• a frame member made by joining a plurality of molded pieces for supporting said electrophotographic photosensitive drum or said process means,
• wherein said frame member has a construction in that at least two molded pieces obtained by injection molding of plastic are provisionally connected by being adjacently arranged or abutted against each other, the provisionally connected molded pieces are set in dies which are different from a die used for formation of each of the molded pieces, and a molten resin is injected into a gap formed between opposed surfaces of the molded pieces that are adjacently arranged or abutted against each other to connect the molded pieces, and wherein a portion of the opposed surfaces to be connected with the molten resin when the molten resin flows into the gap is not an entire circumference of the gap, and
• wherein a rib for stopping the molten resin is provided in an injection channel to stop the flow of the molten resin injected into the injection channel through which the molten resin flows.

A process cartridge detachably mountable to a main body of an image forming apparatus, said process cartridge comprising:

• an electrophotographic photosensitive drum;
• process means for acting on said electrophotographic photosensitive drum;
• and
• a frame member made by joining a plurality of molded pieces for supporting said electrophotographic photosensitive drum or said process means,
• wherein said frame member has a construction in that at least two kinds of frames including a first frame and a second frame, both being molded pieces, are provisionally connected so as to be adjacently arranged or abutted against each other by a third frame and a fourth frame, both being molded pieces, at side faces of the first and second frames on one end side and the other end side, the provisionally connected frames are set in dies which are different from a die used for formation of each of the molded pieces, and a molten resin is injected into a gap formed between opposed surfaces of the molded pieces that are adjacently arranged or abutted against each other to connect the molded pieces, and wherein a portion of the opposed surfaces to be connected with the molten resin when the molten resin flows into the gap is not an entire circumference of the gap, and
• wherein a rib for stopping the molten resin is provided in an injection channel to stop the flow of the molten resin injected into the injection channel through which the molten resin flows.

An electrophotographic image forming apparatus to which a process cartridge is detachably mountable for forming an image on a recording medium, said electrophotographic image forming apparatus comprising:

• (a) mounting means for mounting the process cartridge, the process cartridge comprising:
• an electrophotographic photosensitive drum;
• process means for acting on the electrophotographic photosensitive drum;
• and
• a frame made by joining a plurality of molded pieces for supporting the electrophotographic photosensitive drum or the process means,
• wherein the frame has a construction in that at least two molded pieces obtained by injection molding of plastic are provisionally connected by being adjacently arranged or abutted against each other, the provisionally connected molded pieces are set in dies which are different from a die used for formation of each of the molded pieces, and a molten resin is injected into a gap formed between opposed surfaces of the molded pieces that are adjacently arranged or abutted against each other to connect the molded pieces, and wherein an injection channel for the molten resin up to the gap is formed in one of the molded pieces forming the gap of the opposed surfaces that are adjacently arranged or abutted against each other, and
• wherein a rib for stopping the molten resin is provided in the injection channel to stop the flow of the molten resin injected into the injection channel;
• and
• (b) transporting means for transporting the recording medium.

An electrophotographic image forming apparatus to which a process cartridge is detachably mountable for forming an image on a recording medium, said electrophotographic image forming apparatus comprising:

• (a) mounting means for mounting the process cartridge, the process cartridge comprising:
• an electrophotographic photosensitive drum;
• process means for acting on said electrophotographic photosensitive drum;
• and
• a frame member made by joining a plurality of molded pieces for supporting said electrophotographic photosensitive drum or said process means,
• wherein said frame member has a construction in that at least two kinds of frames including a first frame and a second frame, both being molded pieces, are provisionally connected so as to be adjacently arranged or abutted against each other by a third frame and a fourth frame, both being molded pieces, at side faces of the first and second frames on one end side and the other end side, the provisionally connected frames are set in dies which are different from a die used for formation of each of the molded pieces, and a molten resin is injected into a gap formed between opposed surfaces of the molded pieces that are adjacently arranged or abutted against each other to connect the molded pieces, and wherein an injection channel for the molten resin up to the gap is formed in the third frame and the fourth frame, and wherein a rib for stopping the molten resin is provided in the injection channel to stop the flow of the molten resin injected into the injection channel;
• and
• (b) transporting means for transporting the recording medium.

An electrophotographic image forming apparatus to which a process cartridge is detachably mountable for forming an image on a recording medium, said electrophotographic image forming apparatus comprising:

• (a) mounting means for mounting the process cartridge, the process cartridge comprising:
• an electrophotographic photosensitive drum;
• process means for acting on said electrophotographic photosensitive drum;
• and
• a frame member made by joining a plurality of molded pieces for supporting said electrophotographic photosensitive drum or said process means,
• wherein said frame member has a construction in that at least two molded pieces obtained by injection molding of plastic are provisionally connected by being adjacently arranged or abutted against each other, the provisionally connected molded pieces are set in dies which are different from a die used for formation of each of the molded pieces, and a molten resin is injected into a gap formed between opposed surfaces of the molded pieces that are adjacently arranged or abutted against each other to connect the molded pieces, and wherein a portion of the opposed surfaces to be connected with the molten resin when the molten resin flows into the gap is not an entire circumference of the gap, and
• wherein a rib for stopping the molten resin is provided in an injection channel to stop the flow of the molten resin injected into the injection channel through which the molten resin flows;
• and
• (b) transporting means for transporting the recording medium.

An electrophotographic image forming apparatus to which a process cartridge is detachably mountable for forming an image on a recording medium, said electrophotographic image forming apparatus comprising:

• (a) mounting means for mounting the process cartridge, the process cartridge comprising:
• an electrophotographic photosensitive drum;
• process means for acting on said electrophotographic photosensitive drum;
• and
• a frame member made by joining a plurality of molded pieces for supporting said electrophotographic photosensitive drum or said process means,
• wherein said frame member has a construction in that at least two kinds of frames including a first frame and a second frame, both being molded pieces, are provisionally connected so as to be adjacently arranged or abutted against each other by a third frame and a fourth frame, both being molded pieces, at side faces of the first and second frames on one end side and the other end side, the provisionally connected frames are set in dies which are different from a die used for formation of each of the molded pieces, and a molten resin is injected into a gap formed between opposed surfaces of the molded pieces that are adjacently arranged or abutted against each other to connect the molded pieces, and wherein a portion of the opposed surfaces to be connected with the molten resin when the molten resin flows into the gap is not an entire circumference of the gap, and
• wherein a rib for stopping the molten resin is provided in an injection channel to stop the flow of the molten resin injected into the injection channel through which the molten resin flows;
• and
• (b) transporting means for transporting the recording medium.