Patent US3937840A successfully refreshed from Google Patents.
Patent US4532865A successfully refreshed from Google Patents.
US4532865A
Expired / Lapsed
US
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Electrostatic printing method using heat sensitive thermal ink transfer
Assignee: Fujifilm Business Innovation Corp
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Filing: 1983-07-22
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Granted: 1985-08-06
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Expires: 2003-07-22
Abstract
Abstract An electrostatic printing method with which printing is effected using electrical signals representative of picture or image data. A thermal head is driven by the electrical signals so as to transfer heat-sensitive ink in the molten state onto a photo-sensitive sheet from a donor sheet to form a master sheet. The master sheet is then charged, subjected to uniform exposure to form an electrostatic latent image, and then developed using powdered toner. The toner image is transferred onto a printing sheet and fixed thereon to make a copy.
Inventors
- 👤 Masaki Yoshino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:17
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/398; G; G03; G03F; G03F7/00; G03F7/20; G03F7/2002; G03F7/2014; G03F7/2016; G03F7/202; G03G; G03G13/00; G03G13/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
An electrostatic printing method comprising the steps of: (a) operating a thermal head in accordance with electrical signals representative of image data; (b) transferring heat-sensitive ink onto a photosensitive sheet from a donor sheet disposed between said thermal head and said photosensitive sheet to form a master sheet to thereby form ink images representative of said image data; (c) charging said master sheet; (d) uniformly exposing said master sheet to form an electrostatic latent image on said ink images; (e) developing said latent image into a toner image with powdered toner; (f) transferring said toner image to a recording sheet; and (g) fixing said toner image on said recording sheet.
Claim 2
Dependent Claim
110 words
An electrostatic printing method comprising the steps of: (a) operating a thermal head in accordance with electrical signals representative of image data; (b) transferring heat-sensitive ink onto a photosensitive sheet from a donor sheet disposed between said thermal head and said photosensitive sheet to form a master sheet to thereby form ink images representative of said image data; (c) charging said master sheet; (d) uniformly exposing said master sheet to form an electrostatic latent image on said ink images; (e) developing said latent image into a toner image with powdered toner; (f) transferring said toner image to a recording sheet; and (g) fixing said toner image on said recording sheet.
Claim 3
Dependent Claim
29 words
The electrostatic printing method of claim 1, further comprising the steps of repeating said steps (c) to (g) a number of times corresponding to a desired number of copies.
Claim 4
Dependent Claim
28 words
The method of claim 1, wherein said steps (a) to (g) are carried out a plurality of times, one time for each color of a multicolor original image.
References Cited (Backward Citations)
US3363555A
Cited
US3635555A
Cited
US3717880A
Cited
US3845306A
Cited
US3781474A
Cited
US4021106A
Cited
DE2461702A1
Cited
US3965332A
Cited
US4255041A
Cited
US4124286A
Cited
JPS54112639A
Cited
JPS5748204A
Cited
JPS5775898A
Cited
US4420268A
Cited
US4399749A
Cited
US4443093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |