US5151734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process cartridge detachably mountable to image forming apparatus featuring a peripherally supported image bearing drum
Assignee: Canon Inc
•
Filing: 1990-09-11
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Granted: 1992-09-29
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Expires: 2010-09-11
Abstract
Abstract A process cartridge detachably mountable to an image forming apparatus includes an image bearing drum; process device actable on the image bearing drum; a housing for accommodating the image bearing drum and the process device; and supporting means for rotatably supporting the image bearing drum at an outer periphery of the image bearing drum.
Inventors
- 👤 Tadayuki Tsuda
- 👤 Kazushi Watanabe
- 👤 Isao Ikemoto
- 👤 Shinichi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:59
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/181; G03G15/00; G03G15/75; G03G15/757; G03G21/1814; G03G2221/00; G03G2221/16; G03G2221/1606; G03G2221/163; G03G2221/1651; G03G2221/1654; G03G2221/18; G03G2221/183; G03G2221/1853
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
48 words
A process cartridge detachably mountable to an image forming apparatus, comprising: an image bearing member; process means actable on said image bearing member; a frame for supporting said process means; and supporting means mounted on said frame for rotatably supporting an outer periphery of said image bearing member.
Claim 2
Dependent Claim
48 words
A process cartridge detachably mountable to an image forming apparatus, comprising: an image bearing member; process means actable on said image bearing member; a frame for supporting said process means; and supporting means mounted on said frame for rotatably supporting an outer periphery of said image bearing member.
Claim 3
Dependent Claim
14 words
A cartridge according to claim 1, wherein said frame functions as said supporting means.
Claim 4
Dependent Claim
18 words
A cartridge according to claim 2, wherein said process means includes charging means, developing means and cleaning means.
Claim 5
Dependent Claim
18 words
A cartridge according to claim 1, wherein said process means comprises charging means, developing means and cleaning means.
Claim 6
Dependent Claim
17 words
A cartridge according to claim 1, wherein said supporting means has a portion functioning as a spacer.
Claim 7
Dependent Claim
25 words
A cartridge according to claim 1, wherein said frame further comprises a second supporting means for rotatably supporting the outer periphery of said process means.
Claim 8
Dependent Claim
15 words
A cartridge according to claim 6, wherein said frame functions as said second supporting means.
Claim 9
Dependent Claim
20 words
A cartridge according to claim 1, wherein said supporting means supports a non-image forming portion of said image bearing member.
Claim 10
Dependent Claim
20 words
A cartridge according to claim 1, wherein said supporting means supports said image bearing member at its longitudinal end portions.
Claim 11
Dependent Claim
29 words
A cartridge according to claim 1, wherein said frame functions as said supporting means, and an outer periphery of said image bearing member is directly supported by said frame.
Claim 12
Dependent Claim
46 words
A cartridge according to claim 1, wherein said supporting means has a stepped portion having a horizontal portion for supporting the outer periphery of said image bearing member, and a vertical portion of the step is effective to limit longitudinal movement of said image bearing member.
Claim 13
Dependent Claim
84 words
A process cartridge detachably mountable to an image forming apparatus, comprising: an image bearing drum; process means actable on said image bearing drum, said process means including a developing roller for carrying a developer to supply the developer to said image bearing drum; a housing for accommodating said image bearing drum and said process means; and supporting means mounted on said housing for rotatably supporting an outer periphery of said image bearing drum and for rotatably supporting an outer periphery of said developing roller.
Claim 14
Dependent Claim
84 words
A process cartridge detachably mountable to an image forming apparatus, comprising: an image bearing drum; process means actable on said image bearing drum, said process means including a developing roller for carrying a developer to supply the developer to said image bearing drum; a housing for accommodating said image bearing drum and said process means; and supporting means mounted on said housing for rotatably supporting an outer periphery of said image bearing drum and for rotatably supporting an outer periphery of said developing roller.
Claim 15
Dependent Claim
28 words
A cartridge according to claim 12, further comprising a portion functioning as a spacer for maintaining a predetermined clearance between said image bearing drum and said developing roller.
Claim 16
Dependent Claim
17 words
A cartridge according to claim 12, wherein said process means further comprises charging means and cleaning means.
Claim 17
Dependent Claim
65 words
A process cartridge detachably mountable to an image forming apparatus, comprising: an image bearing drum; at least one process means actable on said image bearing drum; a housing for accommodating said image bearing drum and said process means; supporting means fixedly mounted on said housing for rotatably supporting an outer periphery of said image bearing drum, wherein said supporting means further supports said process means.
Claim 18
Dependent Claim
65 words
A process cartridge detachably mountable to an image forming apparatus, comprising: an image bearing drum; at least one process means actable on said image bearing drum; a housing for accommodating said image bearing drum and said process means; supporting means fixedly mounted on said housing for rotatably supporting an outer periphery of said image bearing drum, wherein said supporting means further supports said process means.
Claim 19
Dependent Claim
13 words
A cartridge according to claim 15, wherein said supporting means supports cleaning means.
Claim 20
Dependent Claim
13 words
A cartridge according to claim 15, wherein said supporting means supports charging means.
Claim 21
Dependent Claim
69 words
An image forming apparatus for forming an image on a recording material, comprising: a process cartridge detachably mountable to an image forming apparatus, comprising an image bearing member; process means actable on said image bearing member; a frame for supporting said process means; supporting means mounted on said frame for rotatably supporting an outer periphery of said image bearing member; and mounting means for detachably receiving a process cartridge.
Claim 22
Dependent Claim
69 words
An image forming apparatus for forming an image on a recording material, comprising: a process cartridge detachably mountable to an image forming apparatus, comprising an image bearing member; process means actable on said image bearing member; a frame for supporting said process means; supporting means mounted on said frame for rotatably supporting an outer periphery of said image bearing member; and mounting means for detachably receiving a process cartridge.
Claim 23
Dependent Claim
14 words
An apparatus according to claim 18, wherein said frame functions as said supporting means.
Claim 24
Dependent Claim
18 words
An apparatus according to claim 18, wherein said process means comprises charging means, developing means and cleaning means.
Claim 25
Dependent Claim
25 words
An apparatus according to claim 18, wherein said frame further comprises a second supporting means for rotatably supporting the outer periphery of said process means.
Claim 26
Dependent Claim
15 words
An apparatus according to claim 21, wherein said frame functions as said second supporting means.
Claim 27
Dependent Claim
20 words
An apparatus according to claim 18, wherein said supporting means supports a non-image forming portion of said image bearing member.
Claim 28
Dependent Claim
20 words
An apparatus according to claim 18, wherein said supporting means supports said image bearing member at its longitudinal end portions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-29 | 1996-03-30 | 1996-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-29 | 2000-03-30 | 2000-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-29 | 2004-03-30 | 2004-09-29 | $7700.00 | Window Closed / Lapsed |