Patent US4148088A successfully refreshed from Google Patents.
Patent US5729792A successfully refreshed from Google Patents.
US5729792A
Expired / Lapsed
US
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Photosensitive drum unit and a ground plate used therewith
Assignee: Kyocera Document Solutions Inc
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Filing: 1996-10-25
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Granted: 1998-03-17
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Expires: 2016-10-25
Abstract
Abstract A photosensitive drum unit for an image forming device includes a tubular member having two openings at the opposite ends thereof, two flange members pressed into the openings of the tubular member, and an electroconductive ground plate attached to one or both of the flange members. The ground plate is provided with a plurality of projections formed integrally with the ground plate. The projections engage with the tubular member in order to create an electrical connection between the photosensitive drum and the body of the image forming device.
Inventors
- 👤 Masao Ikehara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:30
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/75; G03G15/751
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
116 words
A photosensitive drum unit for an image forming device, comprising: a tubular member having two openings at opposite ends thereof, said tubular member having a diameter D; at least one flange member connectable with said openings of said tubular member, and at least one ground plate connectable to said flange member, said ground plate comprising a disc-shaped substrate and at least one projection which extends beyond an outer circumference of said disc-shaped substrate, and said ground plate having a diameter d; wherein X is defined as a thickness of said ground plate, Y is defined as said diameter d minus said diameter D, and X and Y satisfy inequalities 0.2 mm≦X≦0.4 mm and 0.1 mm≦Y≦-2.5X+1.2 mm.
Claim 2
Dependent Claim
116 words
A photosensitive drum unit for an image forming device, comprising: a tubular member having two openings at opposite ends thereof, said tubular member having a diameter D; at least one flange member connectable with said openings of said tubular member, and at least one ground plate connectable to said flange member, said ground plate comprising a disc-shaped substrate and at least one projection which extends beyond an outer circumference of said disc-shaped substrate, and said ground plate having a diameter d; wherein X is defined as a thickness of said ground plate, Y is defined as said diameter d minus said diameter D, and X and Y satisfy inequalities 0.2 mm≦X≦0.4 mm and 0.1 mm≦Y≦-2.5X+1.2 mm.
Claim 3
Dependent Claim
18 words
The photosensitive drum unit as in claim 1, wherein said ground plate includes a plurality of said projections.
Claim 4
Dependent Claim
17 words
The photosensitive drum unit as in claim 1, wherein said ground plate is composed of stainless steel.
Claim 5
Dependent Claim
116 words
A photosensitive drum unit for an image forming device, comprising: a tubular member having two openings at opposite ends thereof, said tubular member having a diameter D, at least one flange member connectable with said openings of said tubular member, and at least one ground plate, said ground plate having a diameter d and a disc-shaped substrate having a diameter d' smaller than said diameter D of said tubular member, at least one projection which extends beyond an outer circumference of said disc-shaped substrate, and two cutaways formed in said disc-shaped substrate on either side of said projection; wherein said diameter d of said ground plate is larger than said diameter D of said tubular member.
Claim 6
Dependent Claim
116 words
A photosensitive drum unit for an image forming device, comprising: a tubular member having two openings at opposite ends thereof, said tubular member having a diameter D, at least one flange member connectable with said openings of said tubular member, and at least one ground plate, said ground plate having a diameter d and a disc-shaped substrate having a diameter d' smaller than said diameter D of said tubular member, at least one projection which extends beyond an outer circumference of said disc-shaped substrate, and two cutaways formed in said disc-shaped substrate on either side of said projection; wherein said diameter d of said ground plate is larger than said diameter D of said tubular member.
Claim 7
Dependent Claim
18 words
The photosensitive drum unit as in claim 4 wherein said ground plate includes a plurality of said projections.
Claim 8
Dependent Claim
40 words
The photosensitive drum unit as in claim 4 wherein an outer circumferential surface of said flange member include a bevelled portion which is adjacent to said projection when said ground plate and said flange member are connected to, each other.
Claim 9
Dependent Claim
43 words
The photosensitive drum unit as in claim 4 wherein a thickness of said ground plate is defined as X, said diameter d minus said diameter D is defined as Y, and X and Y satisfy inequalities 0.2 mm≦X≦0.4 mm and 0.1 mm≦Y≦-2.5X+1.2 mm.
Claim 10
Dependent Claim
17 words
The photosensitive drum unit as in claim 4, wherein said ground plate is composed of stainless steel.
Claim 11
Dependent Claim
88 words
An ground plate for a photosensitive drum unit in an image forming device, comprising: a disc-shaped substrate having a diameter d' a smaller than a diameter D of said tubular member, and at least one projection which extends beyond an outer circumference of said disc-shaped substrate; wherein said ground plate has a diameter d, a thickness of said ground plate is defined as X, said diameter d minus said diameter D is defined as Y, and X and Y satisfy inequalities 0.2 mm≦X≦0.4 mm and 0.1 mm≦Y≦-2.5X+1.2 mm.
Claim 12
Dependent Claim
88 words
An ground plate for a photosensitive drum unit in an image forming device, comprising: a disc-shaped substrate having a diameter d' a smaller than a diameter D of said tubular member, and at least one projection which extends beyond an outer circumference of said disc-shaped substrate; wherein said ground plate has a diameter d, a thickness of said ground plate is defined as X, said diameter d minus said diameter D is defined as Y, and X and Y satisfy inequalities 0.2 mm≦X≦0.4 mm and 0.1 mm≦Y≦-2.5X+1.2 mm.
Claim 13
Dependent Claim
17 words
The ground plate as in claim 9 wherein said ground plate includes a plurality of said projections.
Claim 14
Dependent Claim
16 words
The ground plate as in claim 9 wherein said ground plate is composed of stainless steel.
Claim 15
Dependent Claim
92 words
An ground plate for a photosensitive drum unit in an image forming device, comprising: an ground plate having a diameter d, said ground plate including a disc-shaped substrate having a diameter d' smaller than a diameter D of a tubular member in a photosensitive drum unit, at least one projection which extends beyond an outer circumference of said disc-shaped substrate, and two cutaways formed in said disc-shaped substrate on either side of said projection; wherein said diameter d of said ground plate is larger than said diameter D of said tubular member.
Claim 16
Dependent Claim
92 words
An ground plate for a photosensitive drum unit in an image forming device, comprising: an ground plate having a diameter d, said ground plate including a disc-shaped substrate having a diameter d' smaller than a diameter D of a tubular member in a photosensitive drum unit, at least one projection which extends beyond an outer circumference of said disc-shaped substrate, and two cutaways formed in said disc-shaped substrate on either side of said projection; wherein said diameter d of said ground plate is larger than said diameter D of said tubular member.
Claim 17
Dependent Claim
17 words
The ground plate as in claim 12 wherein said ground plate includes a plurality of said projections.
Claim 18
Dependent Claim
49 words
The ground plate as in claim 12, wherein said ground plate is attached to a flange member, and an outer circumferential surface of said flange member includes a bevelled portion which is adjacent to said projection when said ground plate and said flange member are connected to each other.
Claim 19
Dependent Claim
49 words
The ground plate as in claim 12, wherein said ground plate has a diameter d, a thickness of said ground plate is defined as X, said diameter d minus said diameter D is defined as Y, and X and Y satisfy inequalities 0.2 mm≦X≦0.4 mm and 0.1 mm≦Y≦-2.5X+1.2 mm.
Claim 20
Dependent Claim
16 words
The ground plate as in claim 12 wherein said ground plate is composed of stainless steel.
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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) | 2001-03-16 | 2001-09-15 | 2002-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-16 | 2005-09-15 | 2006-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-16 | 2009-09-15 | 2010-03-17 | $7700.00 | Window Closed / Lapsed |