US4065304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fixing ink images
Assignee: Xerox Corp
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Filing: 1975-11-28
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Granted: 1977-12-27
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Expires: 1995-11-28
Abstract
Abstract Pigment-oil suspension ink images are fixed by transferring the images to a transfer paper containing an oil-absorbent masking agent and a physically discontinuous overcoating of a thermoplastic fusing material, and then heating the composite to fuse and fix the images.
Inventors
- 👤 Herbert N. Johnston
- 👤 Joseph A. Wray
- 👤 Joe David Robbins
- 👤 Morton Schrager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:10
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04; G03G13/00; G03G13/14; G03G13/16; G03G13/20; G03G7/00; G03G7/0006; G03G7/002; G03G7/0026; G03G7/004; G03G7/0053; G03G7/006; G03G7/0066; G03G7/0073; G03G7/008
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A method for fixing an image, comprised of marking particles suspended in an oil carrier, which comprises: a. applying said image to a transfer paper comprised of a paper substrate which contains an oil-absorbent masking material, and which bears a physically-discontinuous overcoating of a thermoplastic fusing material; b. heating said fusing material beyond its melting point such that the fusing material flows and forms an essentially continuous overcoat on the paper; and c. allowing said fusing material to cool to fix the image.
Claim 2
Independent Claim
83 words
A method for fixing an image, comprised of marking particles suspended in an oil carrier, which comprises: a. applying said image to a transfer paper comprised of a paper substrate which contains an oil-absorbent masking material, and which bears a physically-discontinuous overcoating of a thermoplastic fusing material; b. heating said fusing material beyond its melting point such that the fusing material flows and forms an essentially continuous overcoat on the paper; and c. allowing said fusing material to cool to fix the image.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein said discontinuous overcoat of fusing material is a substantially uniform pattern of discrete dots of said fusing material.
Claim 4
Dependent Claim
28 words
The method of claim 2 where the transfer paper bears an additional thin substantially continuous coating of a thermoplastic fusing material beneath said discontinuous overcoating of fusing material.
Claim 5
Dependent Claim
20 words
The method of claim 2 where said image is comprised of photosensitive pigment particles suspended in a mineral oil carrier.
Claim 6
Dependent Claim
19 words
The method of claim 4 where the thermoplastic fusing material in said discontinuous overcoating consists essentially of polystyrene resin.
Claim 7
Dependent Claim
13 words
The method of claim 5 wherein said dot pattern is a gravure pattern.
Claim 8
Dependent Claim
35 words
The method of claim 5 wherein said oilabsorbent masking material is a member selected from the group consisting of: titanium dioxide, diatomaceous earth, clay, hydrated calcium silicate, calcium carbonate, colloidal silica, casein, and zinc sulfide.
Claim 9
Dependent Claim
16 words
The method of claim 7 wherein the masking material is contained in the paper substrate composition.
Claim 10
Dependent Claim
15 words
The method of claim 7 wherein the masking material is overcoated on the paper substrate.
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) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |