Patent US1007675A successfully refreshed from Google Patents.
Patent US5345294A successfully refreshed from Google Patents.
US5345294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process cartridge and image forming apparatus using same
Assignee: Canon Inc
•
Filing: 1992-12-22
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Granted: 1994-09-06
•
Expires: 2012-12-22
Abstract
Abstract A process cartridge detachably mountable to a main assembly of an image forming apparatus, includes a plurality of process device including at least one member having an electrically conductive cylinder; a supporting frame for supporting as a unit the plural process devices; and an electrode, in the supporting frame, having a first portion electrically contactable to the main assembly and a second portion press-contacted to an end surface of the cylindrical member.
Inventors
- 👤 Yoshiya Nomura
- 👤 Tadayuki Tsuda
- 👤 Isao Ikemoto
- 👤 Kazushi Watanabe
- 👤 Kazuhiko Ishiwata
- 👤 Makoto Tanaka
- 👤 Kanji Yano
- 👤 Shinichi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:28
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G21/00; G03G21/16; G03G21/18; G03G21/1839; G03G21/1867; G03G15/75; G03G15/751; G03G21/1604; G03G21/1623; G03G21/1633; G03G21/1871; G03G2221/00; G03G2221/16; G03G2221/1651; G03G2221/166; G03G2221/1669; G03G2221/18; G03G2221/183
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
93 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: a plurality of process means including at least one electrically conductive cylindrical member having an open end, wherein an electrically conductive portion is exposed at a substantially circular longitudinal end of the open end; supporting means for supporting as a unit said plurality of process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to said longitudinal end of said electrically conductive cylindrical member.
Claim 2
Dependent Claim
93 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: a plurality of process means including at least one electrically conductive cylindrical member having an open end, wherein an electrically conductive portion is exposed at a substantially circular longitudinal end of the open end; supporting means for supporting as a unit said plurality of process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to said longitudinal end of said electrically conductive cylindrical member.
Claim 3
Dependent Claim
20 words
A process cartridge according to claim 1, wherein said cylindrical member is a photosensitive member having an electrophotographic photosensitive layer.
Claim 4
Dependent Claim
17 words
A process cartridge according to claim 1, wherein said cylindrical member is a sleeve for supporting toner.
Claim 5
Dependent Claim
33 words
A process cartridge according to claim 1, wherein said process cartridge comprises at least two cylindrical members including a photosensitive member having an electrophotographic photosensitive layer and a sleeve member for carrying toner.
Claim 6
Dependent Claim
18 words
A process cartridge according to claim 1, wherein said electrode is in the form of a leaf spring.
Claim 7
Dependent Claim
120 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: an electrically conductive cylindrical member supporting an electrophotographic photosensitive layer; process means actable on said photosensitive member for formation of an image; supporting means for supporting as a unit said electrically conductive cylindrical member and said process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said cylindrical member, wherein said cylindrical member has a drive transmission means for receiving a driving force from the main assembly, and said electrode is disposed at an end remote from said drive transmission means.
Claim 8
Dependent Claim
120 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: an electrically conductive cylindrical member supporting an electrophotographic photosensitive layer; process means actable on said photosensitive member for formation of an image; supporting means for supporting as a unit said electrically conductive cylindrical member and said process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said cylindrical member, wherein said cylindrical member has a drive transmission means for receiving a driving force from the main assembly, and said electrode is disposed at an end remote from said drive transmission means.
Claim 9
Dependent Claim
108 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: an electrically conductive cylindrical member supporting an electrophotographic photosensitive layer; developing means for developing a latent image formed on the photosensitive layer, said developing means including a cylindrical member for carrying toner; supporting means for supporting as a unit said electrically conductive cylindrical member and said developing means; and an electrode for each of said cylindrical members, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface substantially circular in shape of an associated one of said cylindrical members.
Claim 10
Dependent Claim
108 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: an electrically conductive cylindrical member supporting an electrophotographic photosensitive layer; developing means for developing a latent image formed on the photosensitive layer, said developing means including a cylindrical member for carrying toner; supporting means for supporting as a unit said electrically conductive cylindrical member and said developing means; and an electrode for each of said cylindrical members, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface substantially circular in shape of an associated one of said cylindrical members.
Claim 11
Dependent Claim
20 words
A process cartridge according to claim 7, wherein said electrodes are disposed adjacent the same side of said process cartridge.
Claim 12
Dependent Claim
31 words
A process cartridge according to claim 7, wherein each of said cylindrical members has drive transmission means, and said electrodes are disposed adjacent the sides remote from said drive transmission means.
Claim 13
Dependent Claim
32 words
A process cartridge according to claim 7, wherein said cylindrical member of said developing means receives driving force from drive transmission means for said electrically conductive cylindrical member having the photosensitive layer.
Claim 14
Dependent Claim
29 words
A process cartridge according to claim 7, wherein the first portion of said electrode electrically contacts the main assembly when said process cartridge is mounted in the main assembly.
Claim 15
Dependent Claim
20 words
A process cartridge according to claim 7, wherein said electrically conductive cylindrical member is made of aluminum and is hollow.
Claim 16
Dependent Claim
15 words
A process cartridge according to claim 7, wherein said electrode is made of phosphor bronze.
Claim 17
Dependent Claim
27 words
A process cartridge according to claim 7, wherein said electrode is resilient and urges said longitudinal end surface with total force in the range of 70-250 g.
Claim 18
Dependent Claim
18 words
A process cartridge according to claim 14, wherein the total force is in the range of 150-200 g.
Claim 19
Dependent Claim
130 words
An image forming apparatus comprising: a process cartridge, detachably mountable to a main assembly of said image forming apparatus, comprising a plurality of process means including at least one electrically conductive cylindrical member having an open end, wherein an electrically conductive portion is exposed at a substantially circular longitudinal end of the open end; supporting means for supporting as a unit, said plurality of process means; an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to said longitudinal end of said electrically conductive cylindrical member; guiding means for guiding said process cartridge to a predetermined position; and a main assembly electrode contactable to said electrode of said process cartridge when said process cartridge is at the predetermined position.
Claim 20
Dependent Claim
130 words
An image forming apparatus comprising: a process cartridge, detachably mountable to a main assembly of said image forming apparatus, comprising a plurality of process means including at least one electrically conductive cylindrical member having an open end, wherein an electrically conductive portion is exposed at a substantially circular longitudinal end of the open end; supporting means for supporting as a unit, said plurality of process means; an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to said longitudinal end of said electrically conductive cylindrical member; guiding means for guiding said process cartridge to a predetermined position; and a main assembly electrode contactable to said electrode of said process cartridge when said process cartridge is at the predetermined position.
Claim 21
Dependent Claim
23 words
An image forming apparatus according to claim 16, wherein said electrically conductive cylindrical member is a photosensitive member having an electrophotographic photosensitive layer.
Claim 22
Dependent Claim
19 words
An image forming apparatus according to claim 16, wherein said electrically cylindrical member is a sleeve for supporting toner.
Claim 23
Dependent Claim
175 words
An image forming apparatus usable with a process cartridge detachably mountable hereto, a process cartridge detachably mountable to a main assembly of an image forming apparatus comprising an electrically conductive cylindrical member supporting an electrophotographic photosensitive layer; developing means for developing a latent image formed on the photosensitive layer, said developing means including a cylindrical member for carrying toner; supporting means for supporting as a unit said electrically conductive cylindrical member and said developing means; and an electrode for each of said cylindrical members in said supporting means, each of said electrodes comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface substantially circular in shape of an associated one of said cylindrical members; guiding means for guiding said process cartridge to a predetermined position; an electrode of the main assembly contactable with each of said electrodes of said process cartridge when said process cartridge is at the predetermined position; and drive transmission means for driving said electrically conductive cylindrical member having the photosensitive layer.
Claim 24
Dependent Claim
175 words
An image forming apparatus usable with a process cartridge detachably mountable hereto, a process cartridge detachably mountable to a main assembly of an image forming apparatus comprising an electrically conductive cylindrical member supporting an electrophotographic photosensitive layer; developing means for developing a latent image formed on the photosensitive layer, said developing means including a cylindrical member for carrying toner; supporting means for supporting as a unit said electrically conductive cylindrical member and said developing means; and an electrode for each of said cylindrical members in said supporting means, each of said electrodes comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface substantially circular in shape of an associated one of said cylindrical members; guiding means for guiding said process cartridge to a predetermined position; an electrode of the main assembly contactable with each of said electrodes of said process cartridge when said process cartridge is at the predetermined position; and drive transmission means for driving said electrically conductive cylindrical member having the photosensitive layer.
Claim 25
Dependent Claim
29 words
A process cartridge according to claim 19, wherein the first portion of said electrode electrically contacts the main assembly when said process cartridge is mounted in the main assembly.
Claim 26
Dependent Claim
20 words
A process cartridge according to claim 19, wherein said electrically conductive cylindrical member is made of aluminum and is hollow.
Claim 27
Dependent Claim
15 words
A process cartridge according to claim 19, wherein said electrode is made of phosphor bronze.
Claim 28
Dependent Claim
27 words
A process cartridge according to claim 19, wherein said electrode is resilient and urges said longitudinal end surface with total force in the range of 70-250 g.
Claim 29
Dependent Claim
18 words
A process cartridge according to claim 23, wherein the total force is in the range of 150-200 g.
Claim 30
Dependent Claim
94 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: a plurality of process means including at least one electrically conductive cylindrical member; supporting means for supporting, as a unit, said plurality of process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said electrically conductive cylindrical member wherein said electrode directly contacts the longitudinal end surface and is connectable with a bias voltage surface.
Claim 31
Dependent Claim
94 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: a plurality of process means including at least one electrically conductive cylindrical member; supporting means for supporting, as a unit, said plurality of process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said electrically conductive cylindrical member wherein said electrode directly contacts the longitudinal end surface and is connectable with a bias voltage surface.
Claim 32
Dependent Claim
110 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: a plurality of process means including at least one electrically conductive cylindrical member; supporting means for supporting, as a unit, said plurality of process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said electrically conductive cylindrical member, wherein said electrode comprises a bias voltage applying electrode and is electrically connected with a bias voltage application electrode of the main assembly when said process cartridge is mounted in the main assembly.
Claim 33
Dependent Claim
110 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: a plurality of process means including at least one electrically conductive cylindrical member; supporting means for supporting, as a unit, said plurality of process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said electrically conductive cylindrical member, wherein said electrode comprises a bias voltage applying electrode and is electrically connected with a bias voltage application electrode of the main assembly when said process cartridge is mounted in the main assembly.
Claim 34
Dependent Claim
97 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: a plurality of process means including at least one electrically conductive cylindrical member; supporting means for supporting, as a unit, said plurality of process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said electrically conductive cylindrical member, wherein said electrode is resilient and urges said longitudinal end surface with total force in the range of 70-250 g.
Claim 35
Dependent Claim
97 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: a plurality of process means including at least one electrically conductive cylindrical member; supporting means for supporting, as a unit, said plurality of process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said electrically conductive cylindrical member, wherein said electrode is resilient and urges said longitudinal end surface with total force in the range of 70-250 g.
Claim 36
Dependent Claim
18 words
A process cartridge according to claim 27, wherein the total force is in the range of 150-200 g.
Claim 37
Dependent Claim
106 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: an electrically conductive cylindrical member supporting an electrophotographic photosensitive layer; process means actable on said photosensitive member for formation of an image; supporting means for supporting, as a unit, said cylindrical member and said process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said cylindrical member, wherein said electrode is resilient and urges said longitudinal end surface with total force in the range of 70-250 g.
Claim 38
Dependent Claim
106 words
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising: an electrically conductive cylindrical member supporting an electrophotographic photosensitive layer; process means actable on said photosensitive member for formation of an image; supporting means for supporting, as a unit, said cylindrical member and said process means; and an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said cylindrical member, wherein said electrode is resilient and urges said longitudinal end surface with total force in the range of 70-250 g.
Claim 39
Dependent Claim
18 words
A process cartridge according to claim 29, wherein the total force is in the range of 150-200 g.
Claim 40
Dependent Claim
132 words
An image forming apparatus comprising: a process cartridge, detachably mountable to a main assembly of the image forming apparatus, comprising a plurality of process means including at least one electrically conductive cylindrical member; supporting means for supporting, as a unit, said plurality of process means; an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said cylindrical member; guiding means for guiding said process cartridge to a predetermined position; and a main assembly electrode contactable to said electrode of said process cartridge when said process cartridge is at the predetermined position, wherein said electrode is resilient and urges said longitudinal end surface with total force in the range of 70-250 g.
Claim 41
Dependent Claim
132 words
An image forming apparatus comprising: a process cartridge, detachably mountable to a main assembly of the image forming apparatus, comprising a plurality of process means including at least one electrically conductive cylindrical member; supporting means for supporting, as a unit, said plurality of process means; an electrode, in said supporting means, comprising a first portion electrically contactable to the main assembly and a second portion press-contacted to a longitudinal end surface, substantially circular in shape, of said cylindrical member; guiding means for guiding said process cartridge to a predetermined position; and a main assembly electrode contactable to said electrode of said process cartridge when said process cartridge is at the predetermined position, wherein said electrode is resilient and urges said longitudinal end surface with total force in the range of 70-250 g.
Claim 42
Dependent Claim
18 words
A process cartridge according to claim 31, wherein the total force is in the range of 150-200 g.
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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) | 1997-09-05 | 1998-03-07 | 1998-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-05 | 2002-03-07 | 2002-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-05 | 2006-03-07 | 2006-09-06 | $7700.00 | Window Closed / Lapsed |