Patent US5300952A successfully refreshed from Google Patents.
US5300952A
Expired / Lapsed
US
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Thermal image forming equipment forms image directly on image carrier or paper sheet
Assignee: Ricoh Co Ltd
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Filing: 1991-10-25
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Granted: 1994-04-05
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Expires: 2011-10-25
Abstract
Abstract Image forming equipment for applying heat to a charged image carrier to attenuate part of the potential of the image carrier in order to form a latent image on the image carrier. The surface of a dielectric image carrier is charged by a charger and a thermal print head is driven in response to image information in order to form a latent image on the charged surface of the image carrier. A developing roller applies a liquid developer to the latent image and presses it against the portion where the potential has been lowered. The resulting toner image formed on the image carrier is fixed on a paper sheet fed from a paper feeding device or is directly fixed on the image carrier. The image carrier is formed of polyethylene terephthalate or a mixture of polybutylene terephthalate and silicon dioxide.
Inventors
- 👤 Takeo Wada
- 👤 Makoto Obu
- 👤 Toshiyuki Kawanishi
- 👤 Noriyoshi Tarumi
- 👤 Masato Igarashi
- 👤 Takashi Mori
- 👤 Katsuaki Miyawaki
- 👤 Minoru Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:42
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G15/00; G03G15/22; G03G15/32; G03G5/0202; G03G5/0205; G03G5/0211; G03G5/0217
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
Image forming equipment for applying heat to an image carrier which undergoes discharging in association with an image to attenuate part of the potential of said image carrier to thereby form a latent image on said image carrier and then developing said latent image to produce a visible image, said equipment comprising: an image carrier; a fixing device for fixing said visible image; transfer medium feeding means for feeding a transfer medium to the surface of said image carrier carrying said visible image thereon while said image carrier is transported; and transporting means for driving, when the transfer medium is not fed from said transfer medium feeding means, said image carrier carrying said visible image to the outside of said equipment via said fixing device or driving, when a transfer medium is fed from said transfer medium feeding means, said transfer medium to the outside of said equipment together with said image carrier via said fixing device, said image carrier being formed of polyethylene terephthalate, or a mixture of polybutylene terephthalate and silicon dioxide, wherein said fixing device comprises a pair of conductive members facing each other at the intermediary of a transport path along which said image carrier is transported, and a power source for generating an electric field between said pair of conductive members.
Claim 2
Dependent Claim
216 words
Image forming equipment for applying heat to an image carrier which undergoes discharging in association with an image to attenuate part of the potential of said image carrier to thereby form a latent image on said image carrier and then developing said latent image to produce a visible image, said equipment comprising: an image carrier; a fixing device for fixing said visible image; transfer medium feeding means for feeding a transfer medium to the surface of said image carrier carrying said visible image thereon while said image carrier is transported; and transporting means for driving, when the transfer medium is not fed from said transfer medium feeding means, said image carrier carrying said visible image to the outside of said equipment via said fixing device or driving, when a transfer medium is fed from said transfer medium feeding means, said transfer medium to the outside of said equipment together with said image carrier via said fixing device, said image carrier being formed of polyethylene terephthalate, or a mixture of polybutylene terephthalate and silicon dioxide, wherein said fixing device comprises a pair of conductive members facing each other at the intermediary of a transport path along which said image carrier is transported, and a power source for generating an electric field between said pair of conductive members.
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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) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |