Patent US5213922A successfully refreshed from Google Patents.
US5213922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printing method
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1990-03-16
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Granted: 1993-05-25
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Expires: 2010-03-16
Abstract
Abstract An electrostatic printing method, wherein a photosensitive member has a photoconductive layer formed on a support member with a conductive layer therebetween is placed face to face with a drum of electrostatic information recording medium, which has an insulating layer formed on a cylindrical conductive layer. Voltage is applied between the photosensitive member and the conductive layer of the electrostatic information recording medium drum. Electric charge is accumulated in the shape of an image on the surface of the electrostatic information recording medium drum, by performing image exposure from the direction of the photosensitive member. Recording film is supplied at the same speed as the rotating speed of the drum on contact or non-contact basis with the drum, and toner development is performed by a developing machine which is installed face to face to the drum with the recording film therebetween. A conductive roller may be provided at a position where the recording medium is separated from the drum.
Inventors
- 👤 Makoto Matsuo
- 👤 Hiroyuki Obata
- 👤 Minoru Utsumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:03
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/24; G03G15/04; G03G15/04036; G03G15/04045; G03G15/05
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
An electrostatic printing method, wherein a photosensitive member having photoconductive layer formed on a support member with a conductive layer therebetween is placed face-to-face with a drum of electrostatic information recording medium comprising an insulating layer formed on a cylindrical conductive layer, that voltage is applied between the photosensitive member and the conductive layer of the electrostatic information recording medium drum and electric charge is accumulated in the shape of an image on the surface of the electrostatic information recording medium drum by performing image exposure from the direction of the photosensitive member, that recording film is supplied at the same speed as the rotating speed of the drum on contact or non-contact basis with said drum, and that toner development is performed by a developing machine, which is installed face-to-face to the drum with the recording film therebetween.
Claim 2
Dependent Claim
139 words
An electrostatic printing method, wherein a photosensitive member having photoconductive layer formed on a support member with a conductive layer therebetween is placed face-to-face with a drum of electrostatic information recording medium comprising an insulating layer formed on a cylindrical conductive layer, that voltage is applied between the photosensitive member and the conductive layer of the electrostatic information recording medium drum and electric charge is accumulated in the shape of an image on the surface of the electrostatic information recording medium drum by performing image exposure from the direction of the photosensitive member, that recording film is supplied at the same speed as the rotating speed of the drum on contact or non-contact basis with said drum, and that toner development is performed by a developing machine, which is installed face-to-face to the drum with the recording film therebetween.
Claim 3
Dependent Claim
15 words
An electrostatic printing method as recited in claim 1, wherein said recording film comprises paper.
Claim 4
Dependent Claim
156 words
An electrostatic printing method, wherein a photosensitive member having photoconductive layer formed on a support member with a conductive layer therebetween is placed face-to-face with a drum of electrostatic information recording medium comprising an insulating layer formed on a cylindrical conductive layer, that voltage is applied between the photosensitive member and the conductive layer of the electrostatic information recording medium drum and electric charge is accumulated in the shape of an image on the surface of the electrostatic information recording medium drum by performing image exposure from the direction of the photosensitive member, that recording film is supplied at the same speed as the drum by bringing the recording film into contact with said drum, that toner development is performed by a developing machine, installed at the position face-to-face to the drum with the recording film therebetween, and that a conductive roller is provided at the position where the recording film is separated from the drum.
Claim 5
Dependent Claim
156 words
An electrostatic printing method, wherein a photosensitive member having photoconductive layer formed on a support member with a conductive layer therebetween is placed face-to-face with a drum of electrostatic information recording medium comprising an insulating layer formed on a cylindrical conductive layer, that voltage is applied between the photosensitive member and the conductive layer of the electrostatic information recording medium drum and electric charge is accumulated in the shape of an image on the surface of the electrostatic information recording medium drum by performing image exposure from the direction of the photosensitive member, that recording film is supplied at the same speed as the drum by bringing the recording film into contact with said drum, that toner development is performed by a developing machine, installed at the position face-to-face to the drum with the recording film therebetween, and that a conductive roller is provided at the position where the recording film is separated from the drum.
Claim 6
Dependent Claim
15 words
An electrostatic printing method as recited in claim 3, wherein said recording film comprises paper.
Claim 7
Dependent Claim
26 words
An electrostatic printing method as set forth in claim 1 or 2, wherein said drum consists of a surface electric charge type electrostatic information recording medium.
Claim 8
Dependent Claim
26 words
An electrostatic printing method as set forth in claim 1 or 2, wherein said drum consists of an internal electric charge type electrostatic information recording medium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |