EP0353975A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process cartridge and image forming apparatus using same
Assignee: Canon Inc
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Filing: 1989-07-31
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Granted: —
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Expires: 2009-07-31
Abstract
Abstract The present invention relates to a process cartridge 1 removably mountable on an image forming apparatus 20 comprising a support 5; a rotary member 2 having an image bearing surface and rotatably supported by the support 5; a rotatable developing roller 4 supported by the support 5, for carrying developer thereon and supplying the developer to the image bearing surface to develop a latent image formed on the image bearing surface; a first gear 11 arranged in coaxial with the rotary member 2; a second gear 12 arranged in coaxial with the developing roller 4 and meshed with the first gear 11; a guide means 13 for guiding the developing roller 4 in a direction B toward and away from the rotary member 2. The developing roller 4 is guided by the guide means 13 being inclined with respect to a straight line A connecting a center of rotation of the rotary member 11 to a center of rotation of the developing roller 4, by an angle between 0.7 x ϑ (ϑ is a pressure angle of the second gear 12) and 1.3 x ϑ. The cartridge 1 further includes a bias means 10 for biasing the developing roller 4 toward the image bearing surface.
Inventors
- 👤 Yasuo Miyauchi
- 👤 Akio Takeda
- 👤 Haruo Uchida
- 👤 Yasutsugu Saijo
- 👤 Akihiro Nomura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 11:41
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/1817; G03G21/1821; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0813; G03G21/1839; G03G21/1867; G03G2221/00; G03G2221/16; G03G2221/1651; G03G2221/1657; G03G2221/18; G03G2221/183
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
176 words
A process cartridge removably mountable on an image forming apparatus, comprising: a support; a rotary member having an image bearing surface and rotatably supported by said support; a rotatable developing roller supported by said support, for carrying developer thereon and supplying said developer to said image bearing surface to develop a latent image formed on said image bearing surface; a first gear arranged in coaxial with said rotary member; a second gear arranged in coaxial with said developing roller and meshed with said first gear; a guide means for guiding said developing roller in a direction toward and away from said rotary member, a direction to which said developing roller is guided by said guide means being inclined with respect to a straight line connecting a center of rotation of said rotary member to a center of rotation of said developing roller, by an angle between 0.7 x ϑ (ϑ is a pressure angle of said second gear) and 1.3 x ϑ; and a bias means for biasing said developing roller toward said image bearing surface.
Claim 2
Dependent Claim
176 words
A process cartridge removably mountable on an image forming apparatus, comprising: a support; a rotary member having an image bearing surface and rotatably supported by said support; a rotatable developing roller supported by said support, for carrying developer thereon and supplying said developer to said image bearing surface to develop a latent image formed on said image bearing surface; a first gear arranged in coaxial with said rotary member; a second gear arranged in coaxial with said developing roller and meshed with said first gear; a guide means for guiding said developing roller in a direction toward and away from said rotary member, a direction to which said developing roller is guided by said guide means being inclined with respect to a straight line connecting a center of rotation of said rotary member to a center of rotation of said developing roller, by an angle between 0.7 x ϑ (ϑ is a pressure angle of said second gear) and 1.3 x ϑ; and a bias means for biasing said developing roller toward said image bearing surface.
Claim 3
Dependent Claim
35 words
A process cartridge according to claim 1, further including spacer members provided in coaxial with said developing roller, said spacer members being pressed against said rotary member by a biasing force of said bias means.
Claim 4
Dependent Claim
92 words
A process cartridge according to claim 1, further including: a developer containing portion for containing said developer to be supplied to said developing roller; an agitating member arranged in said developer containing portion, for agitating said developer; and a third gear meshed with said second gear, for transmitting a driving force to said agitating member, a center of rotation of said third gear being situated in a direction inclined with respect to said direction to which said developing roller is guided by an angle between 0.7 x ϑ and 1.3 x ϑ.
Claim 5
Dependent Claim
92 words
A process cartridge according to claim 2, further including: a developer containing portion for containing said developer to be supplied to said developing roller; an agitating member arranged in said developer containing portion, for agitating said developer; and a third gear meshed with said second gear, for transmitting a driving force to said agitating member, a center of rotation of said third gear being situated in a direction inclined with respect to said direction to which said developing roller is guided, by an angle between 0.7 x ϑ and 1.3 x ϑ.
Claim 6
Dependent Claim
35 words
A process cartridge according to claim 1, wherein said first gear meshes with a driving force transmission gear provided in said image forming apparatus, when the process cartridge is mounted on said image forming apparatus.
Claim 7
Dependent Claim
35 words
A process cartridge according to claim 2, wherein said first gear meshes with a driving force transmission gear provided in said image forming apparatus, when the process cartridge is mounted on said image forming apparatus.
Claim 8
Dependent Claim
244 words
An image forming apparatus comprising: a support means for removably supporting a process cartridge; a motor; and a driving force transmission gear for transmitting a driving force generated by said motor; said process cartridge including a support; a rotary member having an image bearing surface and rotatably supported by said support; a rotatable developing roller supported by said support, for carrying developer thereon and supplying said developer to said image bearing surface to develop a latent image formed on said image bearing surface; a first gear arranged in coaxial with said rotary member, said first gear being meshed with said driving force transmission gear when said process cartridge is supported by said support means; a second gear arranged in coaxial with said developing roller and meshed with said first gear; a guide means for guiding said developing roller in a direction toward and away from said rotary member, a direction to which said developing roller is guided by said guide menas being inclined with respect to a straight line connecting a center of rotation of said rotary member to a center of rotation of said developing roller, by an angle between 0.7 x ϑ (ϑ is a pressure angle of said second gear) and 1.3 x ϑ; a bias means for biasing said developing roller toward said image bearing surface; and spacer members provided in coaxial with said developing roller and pressed against said rotary member by a biasing force of said bias means.
Claim 9
Dependent Claim
244 words
An image forming apparatus comprising: a support means for removably supporting a process cartridge; a motor; and a driving force transmission gear for transmitting a driving force generated by said motor; said process cartridge including a support; a rotary member having an image bearing surface and rotatably supported by said support; a rotatable developing roller supported by said support, for carrying developer thereon and supplying said developer to said image bearing surface to develop a latent image formed on said image bearing surface; a first gear arranged in coaxial with said rotary member, said first gear being meshed with said driving force transmission gear when said process cartridge is supported by said support means; a second gear arranged in coaxial with said developing roller and meshed with said first gear; a guide means for guiding said developing roller in a direction toward and away from said rotary member, a direction to which said developing roller is guided by said guide menas being inclined with respect to a straight line connecting a center of rotation of said rotary member to a center of rotation of said developing roller, by an angle between 0.7 x ϑ (ϑ is a pressure angle of said second gear) and 1.3 x ϑ; a bias means for biasing said developing roller toward said image bearing surface; and spacer members provided in coaxial with said developing roller and pressed against said rotary member by a biasing force of said bias means.
References Cited (Backward Citations)
No citation records indexed.
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