Patent US4772527A successfully refreshed from Google Patents.
US4772527A
Expired / Lapsed
US
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Image forming method using improved developing agent
Assignee: Toshiba Corp
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Filing: 1986-10-02
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Granted: 1988-09-20
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Expires: 2006-10-02
Abstract
Abstract The present invention uses a developing agent with a Vickers hardness of 3 or more for image forming steps. Therefore, the image forming method according to the present invention can prevent a developing agent from adhering to the surface of an image carrier in a short period of time by the repetition of image forming steps.
Inventors
- 👤 Toshiyuki Karaishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:27
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/06; G03G13/08; G03G9/00; G03G9/08; G03G9/0821
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
126 words
An image forming method comprising: a first step for forming a latent image on an image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of selenium-tellurium; a second step for supplying a developing agent with a vickers hardness ranging from 3 to 10, both inclusive, thereby developing the latent image into a visible image, said Vickers hardness of the developing agent being correlated to the Vickers hardness of the photoconductive layer ranging from 30 to 40; a third step for transferring the visible image to the surface of a recording medium; and a fourth step for removing the developing agent remaining on the image carrier after the third step, by temporarily contacting a cleaning blade onto the image carrier.
Claim 2
Dependent Claim
126 words
An image forming method comprising: a first step for forming a latent image on an image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of selenium-tellurium; a second step for supplying a developing agent with a vickers hardness ranging from 3 to 10, both inclusive, thereby developing the latent image into a visible image, said Vickers hardness of the developing agent being correlated to the Vickers hardness of the photoconductive layer ranging from 30 to 40; a third step for transferring the visible image to the surface of a recording medium; and a fourth step for removing the developing agent remaining on the image carrier after the third step, by temporarily contacting a cleaning blade onto the image carrier.
Claim 3
Dependent Claim
31 words
The method according to claim 1, further comprising a fifth step for fixing the visible image transferred to the surface of the recording medium, said fifth step following the third step.
Claim 4
Dependent Claim
33 words
The method according to claim 2, wherein said developing agent is fixed to the surface of the recording medium by being subjected to a pressure, and pressure-fixing is executed in said fifth step.
Claim 5
Dependent Claim
38 words
The method according to claim 3, wherein said fifth step includes fixing the visible image to the recording medium in a manner such that the recording medium with the visible image transferred thereto is held between two rollers.
Claim 6
Dependent Claim
127 words
An image forming method comprising: a first step for forming a latent image on an image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of amorphous silicon; a second step for supplying a developing agent with a Vickers hardness ranging from 3 to 500, both inclusive, thereby developing the latent image into a visible image, said Vickers hardness of the developing agent being correlated to the Vickers hardness of the photoconductive layer ranging from 1000 to 1500; a third step for transferring the visible image to the surface of the recording medium; and a fourth step for removing the developing agent remaining on the image carrier after the third step, by temporarily contacting a cleaning blade onto the image carrier.
Claim 7
Dependent Claim
127 words
An image forming method comprising: a first step for forming a latent image on an image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of amorphous silicon; a second step for supplying a developing agent with a Vickers hardness ranging from 3 to 500, both inclusive, thereby developing the latent image into a visible image, said Vickers hardness of the developing agent being correlated to the Vickers hardness of the photoconductive layer ranging from 1000 to 1500; a third step for transferring the visible image to the surface of the recording medium; and a fourth step for removing the developing agent remaining on the image carrier after the third step, by temporarily contacting a cleaning blade onto the image carrier.
Claim 8
Dependent Claim
31 words
The method according to claim 5, futher comprising a fifth step for fixing the visible image transferred to the surface of the recording medium, said fifth step following the third step.
Claim 9
Dependent Claim
33 words
The method according to claim 6, wherein said developing agent is fixed to the surface of the recording medium by being subjected to a pressure, and pressure-fixing is executed in said fifth step.
Claim 10
Dependent Claim
38 words
The method according to claim 7, wherein said fifth step includes fixing the visible image to the recording medium in a manner such that the recording medium with the visible image transferred thereto is held between two rollers.
Claim 11
Dependent Claim
125 words
An image forming method comprising: a first step for forming a latent image on image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of selenium-arsenic; a second step for supplying a developing agent with a Vickers hardness ranging from 3 to 50, both inclusive, thereby developing the latent image into a visible image, said Vickers hardness of the developing agent being correlated to the Vickers hardness of the photoconductive layer ranging from 100 to 150; a third step for transferring the visible image to the surface of the recording medium; and a fourth step for removing the developing agent remaining on the image carrier after the third step, by temporarily contacting a cleaning blade onto the image carrier.
Claim 12
Dependent Claim
125 words
An image forming method comprising: a first step for forming a latent image on image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of selenium-arsenic; a second step for supplying a developing agent with a Vickers hardness ranging from 3 to 50, both inclusive, thereby developing the latent image into a visible image, said Vickers hardness of the developing agent being correlated to the Vickers hardness of the photoconductive layer ranging from 100 to 150; a third step for transferring the visible image to the surface of the recording medium; and a fourth step for removing the developing agent remaining on the image carrier after the third step, by temporarily contacting a cleaning blade onto the image carrier.
Claim 13
Dependent Claim
31 words
The method according to claim 9, further comprising a firth step for fixing the visible image transferred to the surface of the recording medium, said fifth step following the third step.
Claim 14
Dependent Claim
33 words
The method according to claim 10, wherein said developing agent is fixed to the surface of the recording medium by being subjected to a pressure, and pressure-fixing is executed in said fifth step.
Claim 15
Dependent Claim
38 words
The method according to claim 11, wherein said fifth step includes fixing the visible image to the recording medium in a manner such that the recording medium with the visible image transferred thereto is held between two rollers.
Claim 16
Dependent Claim
123 words
An image forming method comprising: a first step for forming a latent image on an image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of selenium-tellurium; a second step for supplying a developing agent with a Vickers hardness ranging from 3 to 10, both inclusive, by touching a magnetic brush onto the image carrier, thereby developing the latent image into a visible image; a third step for transferring the visible image to the surface of a recording medium; a fourth step for pressure-fixing the visible image transferred to the surface of the recording medium, following the third step; and a fifth step for removing the developing agent remaining on the image carrier after the fourth step.
Claim 17
Dependent Claim
123 words
An image forming method comprising: a first step for forming a latent image on an image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of selenium-tellurium; a second step for supplying a developing agent with a Vickers hardness ranging from 3 to 10, both inclusive, by touching a magnetic brush onto the image carrier, thereby developing the latent image into a visible image; a third step for transferring the visible image to the surface of a recording medium; a fourth step for pressure-fixing the visible image transferred to the surface of the recording medium, following the third step; and a fifth step for removing the developing agent remaining on the image carrier after the fourth step.
Claim 18
Dependent Claim
38 words
The method according to claim 13 wherein said fourth step includes fixing the visible image to the recording medium in a manner such that the recording medium with the visible image transferred thereto is held between two rollers.
Claim 19
Dependent Claim
124 words
An image forming method comprising: a first step for forming a latent image on an image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of amorphous silicon; a second step for supplying a developing agent with a Vickers hardness ranging from 3 to 500, both inclusive, by touching a magnetic brush onto the image carrier, thereby developing the latent image into a visible image; a third step for transferring the visible image to the surface of a recording medium; a fourth step for pressure-fixing the visible image transferred to the surface of the recording medium, following the third step; and a fifth step for removing the developing agent remaining on the image carrier after the fourth step.
Claim 20
Dependent Claim
124 words
An image forming method comprising: a first step for forming a latent image on an image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of amorphous silicon; a second step for supplying a developing agent with a Vickers hardness ranging from 3 to 500, both inclusive, by touching a magnetic brush onto the image carrier, thereby developing the latent image into a visible image; a third step for transferring the visible image to the surface of a recording medium; a fourth step for pressure-fixing the visible image transferred to the surface of the recording medium, following the third step; and a fifth step for removing the developing agent remaining on the image carrier after the fourth step.
Claim 21
Dependent Claim
38 words
The method according to claim 15, wherein said fourth step includes fixing the visible image to the recording medium in a manner such that the recording medium with the visible image transferred thereto is held between two rollers.
Claim 22
Dependent Claim
19 words
The method according to claim 15, wherein said photoconductive layer has a Vickers hardness ranging from 1000 to 1500.
Claim 23
Dependent Claim
122 words
An image forming method comprising: a first step for forming a latent image on image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of selenium-arsenic; a second step for supplying a developing agent with a Vickers hardness ranging from 3 to 50, both inclusive, by touching a magnetic brush onto the image carrier, thereby developing the latent image into a visible image; a third step for transferring the visible image to the surface of the recording medium; a fourth step for pressure-fixing the visible image transferred to the surface of the recording medium, following the third step; and a fifth step for removing the developing agent remaining on the image carrier after the fourth step.
Claim 24
Dependent Claim
122 words
An image forming method comprising: a first step for forming a latent image on image carrier in accordance with an image, said image carrier including a photoconductive layer mainly composed of selenium-arsenic; a second step for supplying a developing agent with a Vickers hardness ranging from 3 to 50, both inclusive, by touching a magnetic brush onto the image carrier, thereby developing the latent image into a visible image; a third step for transferring the visible image to the surface of the recording medium; a fourth step for pressure-fixing the visible image transferred to the surface of the recording medium, following the third step; and a fifth step for removing the developing agent remaining on the image carrier after the fourth step.
Claim 25
Dependent Claim
38 words
The method according to claim 18, wherein said fourth step includes fixing the visible image to the recording medium in a manner such that the recording medium with the visible image transferred thereto is held between two rollers.
Claim 26
Dependent Claim
19 words
The method according to claim 18, wherein said photoconductive layer has a Vickers hardness ranging from 100 to 150.
Claim 27
Dependent Claim
19 words
The method according to claim 13 wherein said photoconductive layer has a Vickers hardness ranging from 30 to 40.
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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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |