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US 6,185,393 B2Granted
Developing apparatus, magnetic seal mounting method and process cartridge
AssigneeCanon Kabushiki Kaisha
InventorsToshiyuki Karakama, Atsushi Numagami
Life of this patent
Estimating the term…
Abstract
A developing apparatus includes a developing roller; a magnetic seal provided at a longitudinal end of the developing roller; a positioning surface between a developing frame supporting the developing roller and a bottom end of the magnetic seal, the positioning surface being in contact with the developing frame and the magnetic seal; an end seal provided between the developing frame and the bottom end of the magnetic seal.
Claims37
A developing apparatus for developing a latent image formed on an electrophotographic photosensitive member, said developing apparatus comprising:
- a developing roller;
- a magnetic seal provided at each of longitudinal ends of said developing roller;
- a positioning surface provided at each of longitudinal ends of a developing frame supporting said developing roller;
- an end seal provided between said developing frame and the bottom end of said magnetic seal;
- a seal surface provided behind said positioning surface with respect to a direction of contact of a portion of said magnetic seal to said positioning surface, said seal surface being provided at each of longitudinal ends of the developing frame,
- wherein a part of said magnetic seal is contacted to said positioning surface, and said end seal is provided between said magnetic seal and said seal surface.
3 more elements
A developing apparatus for developing a latent image formed on an electrophotographic photosensitive member, said developing apparatus comprising:
- a developing roller;
- a magnetic seal provided at each of longitudinal ends of said developing roller;
- a positioning surface provided at each of longitudinal ends of a developing frame supporting said developing roller;
- a seal surface provided behind said positioning surface with respect to a direction of contact of a portion of said magnetic seal to said positioning surface, said seal surface being provided at each of longitudinal ends of the developing frame,
- wherein a part of said magnetic seal is contacted to said positioning surface, and an end seal is provided between said magnetic seal and said seal surface,
- wherein said magnetic seal is provided with an arcuate portion extended along a peripheral surface of said developing roller with a gap therebetween and provided with a linear portion extended upwardly from said arcuate portion;
- an elastic seal mounted to said magnetic seal over said arcuate portion and linear portion, said elastic seal sealing said magnetic seal and said developing frame;
- and
- wherein said end seal is provided at an end of said arcuate portion and contacts said seal surface of said developing frame.
6 more elements
A magnetic seal mounting method comprising the steps of:
- preparing a magnetic seal;
- preparing a developing frame including, a developing roller mounting portion for mounting a developing roller, a magnetic seal mounting portion extended in a direction crossing with the developing roller mounting portion, a supporting member mounting portion for mounting a developing blade supporting member, a position surface for positioning said magnetic seal and a sealing surface for abutment with an end seal;
- wherein said magnetic seal is provided with an arcuate portion extended along a peripheral surface of said developing roller with a gap formed therebetween when said magnetic seal is mounted to said magnetic seal mounting portion of said developing frame, and provided with a linear portion extended upwardly from said arcuate portion;
- preparing a developing blade having a supporting member for mounting said developing blade to said supporting member mounting portion extended in a longitudinal direction of said developing roller mounted to said developing roller mounting portion;
- preparing an elastic seal for sealing between said magnetic seal and said developing frame along said magnetic seal;
- and
- preparing said end seal for sealing between said magnetic seal and said sealing surface of said developing frame;
- and
- bonding said end seal and said elastic seal on said magnetic seal;
- mounting said magnetic seal on said magnetic seal mounting portion of said developing frame;
- and
- fixing said supporting member for said developing blade on said supporting member mounting portion of said developing frame.
9 more elements
A magnetic seal mounting method comprising the steps of:
- preparing a magnetic seal;
- preparing a developing frame including, a developing roller mounting portion for mounting a developing roller, a magnetic seal mounting portion extended in a direction crossing with the developing roller mounting portion, a supporting member mounting portion for mounting a developing blade supporting member, a positioning surface for positioning said magnetic seal and a sealing surface for abutment with an end seal,
- wherein said magnetic seal is provided with an arcuate portion extended along a peripheral surface of said developing roller with a gap formed therebetween when said magnetic seal is mounted to said magnetic seal mounting portion of said developing frame, and provided with a linear portion extended upwardly from said arcuate portion;
- preparing a developing blade having a supporting member for mounting said developing blade to said supporting member mounting portion extending in a longitudinal direction of said developing roller mounted to said developing roller mounting portion;
- preparing an elastic seal for sealing between said magnetic seal and said developing frame along said magnetic seal;
- and
- preparing said end seal for sealing between said magnetic seal and contacting said sealing surface of said developing frame wherein said end seal and said elastic seal are integral with each other;
- and
- bonding said end seal and said elastic seal on said magnetic seal;
- mounting said magnetic seal to said magnetic seal mounting portion of said developing frame;
- and
- fixing said supporting member for said developing blade on said supporting member mounting portion of said developing frame.
9 more elements
A magnetic seal mounting method comprising the steps of:
- preparing a magnetic seal;
- preparing a developing frame including, a developing roller mounting portion for mounting a developing roller, a magnetic seal mounting portion extended in a direction crossing with the developing roller mounting portion, a supporting member mounting portion for mounting a developing blade supporting member, a positioning surface for positioning said magnetic seal and a sealing surface for abutment with an end seal;
- wherein said magnetic seal is provided with an arcuate portion extended along a peripheral surface of said developing roller with a gap formed therebetween when said magnetic seal is mounted to said magnetic seal mounting portion of said developing frame, and provided with a linear portion extended upwardly from said arcuate portion;
- preparing a developing blade having a supporting member for mounting said developing blade to said supporting member mounting portion extending in a longitudinal direction of said developing roller mounted to said developing roller mounting portion;
- preparing an elastic seal for sealing between said magnetic seal and said developing frame along said magnetic seal;
- preparing said end seal for sealing between said magnetic seal and said sealing surface of said developing frame;
- bonding said end seal and said elastic seal on said magnetic seal;
- mounting said magnetic seal on said magnetic seal mounting portion of said developing frame;
- and
- fixing said supporting member for said developing blade on said supporting member mounting portion of said developing frame.
7 more elements
A magnetic seal mounting method comprising:
- preparing a magnetic seal;
- preparing a developing frame including, a developing roller mounting portion for mounting a developing roller, a magnetic seal mounting portion extended in a direction crossing with the developing roller mounting portion, a supporting member mounting portion for mounting a developing blade supporting member, a positioning surface for positioning said magnetic seal and a sealing surface for abutment with an end seal;
- wherein said magnetic seal is provided with an arcuate portion extended along a peripheral surface of said developing roller with a gap formed therebetween when said magnetic seal is mounted to said magnetic seal mounting portion of said developing frame, and provided with a linear portion extended upwardly from said arcuate portion;
- preparing a developing blade having a supporting member for mounting said developing blade to said supporting member mounting portion extending in a longitudinal direction of said developing roller mounted to said developing roller mounting portion;
- preparing an elastic seal for sealing said magnetic seal and said developing frame along said magnetic seal;
- and
- preparing said end seal for sealing between said magnetic seal and said sealing surface of said developing frame, wherein said end seal and said elastic seal are integral with each other;
- and
- mounting said integral end seal and elastic seal on said magnetic seal mounting portion of said developing frame;
- mounting said magnetic seal to said magnetic seal mounting portion of said developing frame;
- and
- fixing said supporting member for said developing blade on said supporting member mounting portion of said developing frame.
9 more elements
A process cartridge detachably mountable relative to a main assembly of an electrophotographic image forming apparatus, said process cartridge comprising:
- an electrophotographic photosensitive drum;
- a developing roller for developing a latent image formed on said electrophotographic photosensitive drum with a developer;
- a magnetic seal provided at each of longitudinal ends of said developing roller;
- a positioning surface provided at each of longitudinal ends of a developing frame supporting said developing roller;
- an end seal provided between said developing frame and the bottom end of said magnetic seal;
- a seal surface provided behind said positioning surface with respect to a direction of contact of a portion of said magnetic seal to said positioning surface, said seal surface being provided at each of longitudinal ends of the developing frame,
- wherein a part of said magnetic seal is contacted to said positioning surface, and said end seal is provided between said magnetic seal and said seal surface.
4 more elements
A process cartridge detachably mountable relative to a main assembly of an electrophotographic image forming apparatus, comprising:
- an electrophotographic photosensitive drum;
- a developing roller for developing a latent image formed on said electrophotographic photosensitive drum;
- a magnetic seal provided at each of longitudinal ends of said developing roller;
- a positioning surface provided at each of longitudinal ends of a developing frame supporting said developing roller;
- a seal surface provided behind said positioning surface with respect to a direction of contact of a portion of said magnetic seal to said positioning surface, said seal surface being provided at each of longitudinal ends of the developing frame,
- wherein said magnetic seal is contacted to said positioning surface and an end seal is provided between said magnetic seal and said seal surface;
- wherein said magnetic seal is provided with an arcuate portion extended along a peripheral surface of said developing roller with a gap therebetween and provided with a linear portion extended upwardly from said arcuate portion;
- an elastic seal mounted to said magnetic seal over said arcuate portion and linear portion, said elastic seal sealing said magnetic seal and said developing frame;
- and
- wherein said end seal is provided at an end of said arcuate portion and contacts said seal surface to said developing frame.
7 more elements
Dependencies are inferred from the claim text.