US4258115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet developing method using elastic roller for electrostatic image and a device therefor
Assignee: Canon Inc
•
Filing: 1979-02-28
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Granted: 1981-03-24
•
Expires: 1999-02-28
Abstract
Abstract In developing an electrostatic image by supplying developing liquid to an electrostatic image bearing surface, the developing liquid is brought into contact with the image bearing surface to effect development of the electrostatic image, and then a developing member is urged against the image bearing surface to thereby effect supply of the developing liquid and collection of excess developing liquid by the developing member and thereby effect further development of the electrostatic image.
Inventors
- 👤 Tamotsu Magome
- 👤 Takashi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
101 words
A method of developing an electrostatic image by supplying developing liquid to an electrostatic image bearing surface, said method comprising a first step of bringing said developing liquid into contact with said bearing surface to effect development of the electrostatic image, and a second step of urging an elastic member having an endless outer surface and which squeezes out and absorbs liquid in accordance with its elastic deformation against said bearing surface after said first step to effect supply of said developing liquid and absorption of excess developing liquid by said member and thereby effect further development of said electrostatic image.
Claim 2
Independent Claim
101 words
A method of developing an electrostatic image by supplying developing liquid to an electrostatic image bearing surface, said method comprising a first step of bringing said developing liquid into contact with said bearing surface to effect development of the electrostatic image, and a second step of urging an elastic member having an endless outer surface and which squeezes out and absorbs liquid in accordance with its elastic deformation against said bearing surface after said first step to effect supply of said developing liquid and absorption of excess developing liquid by said member and thereby effect further development of said electrostatic image.
Claim 3
Dependent Claim
39 words
A method according to claim 1, wherein during said first step there is formed a pool of developing liquid which contacts said electrostatic image bearing surface so that the electrostatic image is developed by said pool of developing liquid.
Claim 4
Dependent Claim
42 words
A method according to claim 1, wherein during the second step said electrostatic image bearing surface and said elastic member are moved relative to each other in the same direction and substantially at the same velocity at the surface of contact therebetween.
Claim 5
Dependent Claim
26 words
A method according to claim 1, wherein during the second step said elastic member effects development of said electrostatic image while functioning as a developing electrode.
Claim 6
Dependent Claim
17 words
A method according to claim 1, wherein said first and second steps take place continuously in time.
Claim 7
Independent Claim
74 words
A device for wet-developing an electrostatic image comprising a developing member for supplying developing liquid to an electrostatic image formed on an electrostatic image bearing member by being urged against said bearing member as the means for developing said electrostatic image with developing liquid and for collecting excess developing liquid, and a liquid pool forming member disposed in proximity to said developing member and said bearing member for forming a pool of developing liquid.
Claim 8
Independent Claim
74 words
A device for wet-developing an electrostatic image comprising a developing member for supplying developing liquid to an electrostatic image formed on an electrostatic image bearing member by being urged against said bearing member as the means for developing said electrostatic image with developing liquid and for collecting excess developing liquid, and a liquid pool forming member disposed in proximity to said developing member and said bearing member for forming a pool of developing liquid.
Claim 9
Dependent Claim
36 words
A device according to claim 6, wherein said developing member is an elastic member formed into a roller or an endless belt which effects liquid squeeze-out and absorbing actions in accordance with the elastic deformation thereof.
Claim 10
Dependent Claim
37 words
A device according to claim 6, wherein said electrostatic image bearing member takes the form of a drum and is disposed so as to be rotatable substantially at the same velocity as the developing member urged thereagainst.
Claim 11
Dependent Claim
19 words
A device according to claim 6, wherein said liquid pool forming member is in the form of a plate.
Claim 12
Dependent Claim
15 words
A device according to claim 6, wherein said liquid pool forming member is a roller.
Claim 13
Dependent Claim
16 words
A device according to claim 6, wherein said liquid pool forming member is an endless belt.
Claim 14
Dependent Claim
30 words
A device according to claim 6, wherein said liquid pool forming member is formed of a material having an effect as a developing electrode of said electrostatic image bearing member.
Claim 15
Dependent Claim
28 words
A device according to claim 6, wherein said developing member is formed of a material having an effect as a developing electrode of said electrostatic image bearing member.
Claim 16
Independent Claim
94 words
A device for wet-developing an electrostatic image comprising a developing member for supplying developing liquid to an electrostatic image bearing member by being urged against said bearing member and rotated as the means for developing an electrostatic image formed on said bearing member with developing liquid and for collecting excess developing liquid, and a liquid pool forming rotatable member having a portion of the peripheral surface thereof in contact with said developing member, said liquid pool forming rotatable member being disposed in proximity to said bearing member to form a developing liquid pool area.
Claim 17
Independent Claim
94 words
A device for wet-developing an electrostatic image comprising a developing member for supplying developing liquid to an electrostatic image bearing member by being urged against said bearing member and rotated as the means for developing an electrostatic image formed on said bearing member with developing liquid and for collecting excess developing liquid, and a liquid pool forming rotatable member having a portion of the peripheral surface thereof in contact with said developing member, said liquid pool forming rotatable member being disposed in proximity to said bearing member to form a developing liquid pool area.
Claim 18
Dependent Claim
36 words
A device according to claim 14, wherein said developing member is an elastic member formed into a roller or an endless belt which effects liquid squeeze-out and absorbing actions in accordance with the elastic deformation thereof.
Claim 19
Dependent Claim
37 words
A device according to claim 14, wherein said electrostatic image bearing member takes the form of a drum and is disposed so as to be rotatable substantially at the same velocity as the developing member urged thereagainst.
Claim 20
Dependent Claim
20 words
A device according to claim 14, wherein said liquid pool forming rotatable member is a roller or an endless belt.
Claim 21
Dependent Claim
26 words
A device according to claim 14, wherein at least the outer peripheral surface of said liquid pool forming rotatable member is formed of an elastic material.
Claim 22
Dependent Claim
22 words
A device according to claim 14, wherein said liquid pool forming rotatable member has grooves formed in the outer peripheral surface thereof.
Claim 23
Dependent Claim
43 words
A device according to claim 14, wherein said liquid pool forming rotatable member is rotatable so that the direction of movement of said liquid pool forming rotatable member is the same as that of said developing member at the surface of contact therebetween.
Claim 24
Dependent Claim
31 words
A device according to claim 14, wherein said liquid pool forming rotatable member is formed of a material having an effect as a developing electrode of said electrostatic image bearing member.
Claim 25
Dependent Claim
28 words
A device according to claim 14, wherein said developing member is formed of a material having an effect as a developing electrode of said electrostatic image bearing member.
References Cited (Backward Citations)
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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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |