Patent US1898632A successfully refreshed from Google Patents.
Patent US4621919A successfully refreshed from Google Patents.
US4621919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal drum and image holding member using the same
Assignee: Canon Inc
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Filing: 1983-07-13
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Granted: 1986-11-11
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Expires: 2003-07-13
Abstract
Abstract An image holding member for electrophotography has a metal drum, one side face of which is formed integrally with the peripheral face of the drum. And the image holding member has at the center of said side face a rotatory drum supporting shaft formed integrally with said side face.
Inventors
- 👤 Hiroshi Nitanda
- 👤 Morikazu Mizutani
- 👤 Taketoshi Yokoyama
- 👤 Jun Tamai
- 👤 Toru Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:58
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/75; G03G15/751
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
93 words
An image holding member for electrophotography having a metal drum, wherein said drum has first and second side faces, said first side face being formed integrally with the peripheral surface of the drum, characterized in that the image holding member has a rotatory shaft formed integrally at the center of said first side face, and has at least one formation on said first side face for receiving an external rotational driving force to rotate the metal drum, wherein the integrally formed rotary shaft and the formation are spaced from said second side face.
Claim 2
Dependent Claim
93 words
An image holding member for electrophotography having a metal drum, wherein said drum has first and second side faces, said first side face being formed integrally with the peripheral surface of the drum, characterized in that the image holding member has a rotatory shaft formed integrally at the center of said first side face, and has at least one formation on said first side face for receiving an external rotational driving force to rotate the metal drum, wherein the integrally formed rotary shaft and the formation are spaced from said second side face.
Claim 3
Dependent Claim
15 words
An image holding member according to claim 1, wherein the engaging member is a gear.
Claim 4
Dependent Claim
29 words
An image holding member according to claim 1, wherein the thickness of the side face having the rotatory shaft formed thereon is thicker than that of the peripheral face.
Claim 5
Dependent Claim
58 words
An image holding member according to claim 1, characterized in that the wall thickness of the side face of the metal drum is larger than the wall thickness of the peripheral face of the metal drum, the wall thickness of the central portion of the side face being larger than the wall thickness of the peripheral portion thereof.
Claim 6
Dependent Claim
30 words
An image holding member according to claim 4, wherein the thickness of the side face of the metal drum is continuously increased from the peripheral portion towards the central portion.
Claim 7
Dependent Claim
55 words
An image holding member according to claim 1, characterized in that the wall thickness of the side face of the metal drum is larger than the wall thickness of the peripheral face and the wall thickness of the central portion of the side face is larger than the wall thickness of the peripheral portion thereof.
Claim 8
Dependent Claim
26 words
An image holding member according to claim 6, the wall thickness of the side face is continuously increased from the peripheral portion toward the central portion.
Claim 9
Dependent Claim
17 words
An image holding member according to claim 6, wherein the image holding layer comprises a photoconductive layer.
Claim 10
Dependent Claim
17 words
An image holding member according to claim 6, wherein the image holding layer comprises an insulating layer.
Claim 11
Dependent Claim
92 words
An image holding member comprising an image holding layer and a metal drum, wherein said drum has first and second side faces, said first side face being formed integrally with the peripheral face of the drum, characterized in that the image holding member has a rotatory shaft formed integrally at the center of said first side face, and has least one formation on said first side face for receiving an external rotational driving force to rotate the metal drum, wherein the integrally formed rotary shaft is spaced from said second side face.
Claim 12
Dependent Claim
92 words
An image holding member comprising an image holding layer and a metal drum, wherein said drum has first and second side faces, said first side face being formed integrally with the peripheral face of the drum, characterized in that the image holding member has a rotatory shaft formed integrally at the center of said first side face, and has least one formation on said first side face for receiving an external rotational driving force to rotate the metal drum, wherein the integrally formed rotary shaft is spaced from said second side face.
Claim 13
Dependent Claim
15 words
An image holding member according to claim 10, wherein the engaging member is a gear.
Claim 14
Dependent Claim
32 words
An image holding member according to claim 10, wherein the wall thickness of the side face having the rotatory shaft formed thereon is larger than the wall thickness of the peripheral face.
Claim 15
Dependent Claim
16 words
An image holder member according to claim 10, wherein said another member is a cleaning means.
Claim 16
Dependent Claim
16 words
An image holding member according to claim 10, wherein said another member is a developing means.
Claim 17
Dependent Claim
17 words
An image holding member according to claim 10, wherein the image holding layer comprises a photoconductive layer.
Claim 18
Dependent Claim
17 words
An image holding member according to claim 10, wherein the image holding member comprises an insulating layer.
Claim 19
Dependent Claim
22 words
An image holding member according to claim 16, wherein said rotary shaft is provided with an engaging member for driving another member.
Claim 20
Dependent Claim
83 words
A metal drum, wherein said drum has first and second side faces, said first side face being formed integrally with the peripheral face of the drum, characterized in that the image holding member has a rotatory shaft formed integrally at the center of said first side face, and has at least one projection on said first side face for receiving an external rotational driving force to rotate the metal drum, wherein the integrally formed rotatory shaft is spaced from said second side face.
Claim 21
Dependent Claim
83 words
A metal drum, wherein said drum has first and second side faces, said first side face being formed integrally with the peripheral face of the drum, characterized in that the image holding member has a rotatory shaft formed integrally at the center of said first side face, and has at least one projection on said first side face for receiving an external rotational driving force to rotate the metal drum, wherein the integrally formed rotatory shaft is spaced from said second side face.
Claim 22
Dependent Claim
15 words
The image holding member according to claim 18, wherein the engaging member is a gear.
Claim 23
Dependent Claim
31 words
A metal drum according to claim 18, wherein the wall thickness of the side face having the rotatory shaft formed thereon is larger than the wall thickness of the peripheral face.
Claim 24
Dependent Claim
20 words
A metal drum according to claim 18, wherein said metal drum is formed by impact extrusion molding of a metal.
Claim 25
Dependent Claim
20 words
The device according to claim 18, wherein said rotary shaft is provided with an engaging member for driving another member.
Claim 26
Independent Claim
87 words
A method of making an electrical conductive connection between an image holding member and a main body of an electrophotographic device, characterized in that the image holding member comprises an image holding layer and a metal drum, one side face of the metal drum being formed integrally with a peripheral face of the drum, a rotatory shaft being formed continuously and integrally with the side face, and in that the electrical conductive connection to the main body of the electrophotographic device is made through the rotatory shaft.
Claim 27
Independent Claim
87 words
A method of making an electrical conductive connection between an image holding member and a main body of an electrophotographic device, characterized in that the image holding member comprises an image holding layer and a metal drum, one side face of the metal drum being formed integrally with a peripheral face of the drum, a rotatory shaft being formed continuously and integrally with the side face, and in that the electrical conductive connection to the main body of the electrophotographic device is made through the rotatory shaft.
Claim 28
Dependent Claim
14 words
A method according to claim 23, wherein the metal drum is formed from aluminum.
Claim 29
Independent Claim
107 words
A method of making an electrical conductive connection between an image holding member and a main body of an electrophotographic device, characterized by forming the image holding member with an image holding layer and a metal drum, by providing the metal drum with first and second side faces, said first side face being formed integrally with a peripheral face of the drum, by providing a rotatory supporting shaft formed continuously and integrally with said first side face, by providing said electrical conductive connection to the main body of the electrophotographic device through the rotatory supporting shaft, and by maintaining said shaft spaced from said second side face.
Claim 30
Independent Claim
107 words
A method of making an electrical conductive connection between an image holding member and a main body of an electrophotographic device, characterized by forming the image holding member with an image holding layer and a metal drum, by providing the metal drum with first and second side faces, said first side face being formed integrally with a peripheral face of the drum, by providing a rotatory supporting shaft formed continuously and integrally with said first side face, by providing said electrical conductive connection to the main body of the electrophotographic device through the rotatory supporting shaft, and by maintaining said shaft spaced from said second side face.
Claim 31
Dependent Claim
65 words
An image holding member for electrophotography having a metal drum, wherein said drum has first and second side faces, said first side face being formed integrally with the peripheral surface of the drum, characterized in that said image holding member has a rotatory shaft formed integrally at the center of said first side face, and said rotary shaft is spaced from said second side face.
Claim 32
Dependent Claim
65 words
An image holding member for electrophotography having a metal drum, wherein said drum has first and second side faces, said first side face being formed integrally with the peripheral surface of the drum, characterized in that said image holding member has a rotatory shaft formed integrally at the center of said first side face, and said rotary shaft is spaced from said second side face.
Claim 33
Dependent Claim
22 words
An image holding member according to claim 1 wherein said rotary shaft is provided with an engaging member for driving another member.
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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) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |