US4259422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrographic process for making transparencies
Assignee: Eastman Kodak Co
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Filing: 1978-11-13
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Granted: 1981-03-31
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Expires: 1998-11-13
Abstract
Abstract A transparency that is used to project an image onto a viewing surface such as a screen is prepared by an electrographic copying process. An element used in this process comprises a transparent support that is coated with an image-receiving hydrophilic colloid layer that receives an image pattern of fusible toner particles. The image pattern of toner particles is fused to the hydrophilic colloid layer by contacting the toned image-bearing layer with a heated fuser surface such as a fuser roll. The fuser surface is coated with a release liquid which inhibits offsetting of the toner particles onto the fuser surface. Transparencies prepared by this process exhibit good resistance to abrasion in toned areas while also displaying substantially no release liquid in non-toned areas upon projection viewing. Furthermore, toned areas of such transparencies can be selectively removed by light rubbing with a moist cloth or tissue.
Inventors
- 👤 Bruce W. Davidson
- 👤 Frederick A. Pomeroy
- 👤 M. Akram Sandhu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:21
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/20; G03G13/14; G03G7/00; G03G7/006; G03G7/0073; G03G7/008; G03G7/0086
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
70 words
An electrographic copy process for forming a projection-viewable transparency comprising a. forming a toned image of fusible toner particles on an image-receiving hydrophilic colloid layer of a substantially transparent image receiver element, and b. fusing said toner particles to said hydrophilic colloid layer by contacting said toned image-bearing layer with a heated fuser surface coated with a release liquid which inhibits offsetting of said toner particles onto said fuser surface.
Claim 2
Dependent Claim
70 words
An electrographic copy process for forming a projection-viewable transparency comprising a. forming a toned image of fusible toner particles on an image-receiving hydrophilic colloid layer of a substantially transparent image receiver element, and b. fusing said toner particles to said hydrophilic colloid layer by contacting said toned image-bearing layer with a heated fuser surface coated with a release liquid which inhibits offsetting of said toner particles onto said fuser surface.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said hydrophilic colloid is a proteinaceous hydrophilic colloid.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein said hydrophilic colloid is gelatin.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein said hydrophilic colloid is a synthetic hydrophilic colloid.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein said hydrophilic colloid is a poly(vinyl alcohol).
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein said release liquid is a silicon-containing release liquid.
Claim 8
Dependent Claim
14 words
The process of claim 6 wherein said hydrophilic colloid is a proteinaceous hydrophilic colloid.
Claim 9
Dependent Claim
11 words
The process of claim 6 wherein said hydrophilic colloid is gelatin.
Claim 10
Dependent Claim
14 words
The process of claim 6 wherein said hydrophilic colloid is a synthetic hydrophilic colloid.
Claim 11
Dependent Claim
13 words
The process of claim 6 wherein said hydrophilic colloid is a poly(vinyl alcohol).
Claim 12
Dependent Claim
13 words
The process of claim 6 wherein said toner particles comprise a styrene-containing resin.
Claim 13
Dependent Claim
74 words
An electrographic copy process for forming a projection-viewable transparency comprising a. forming a toned image of fusible toner particles on an image-receiving hydrophilic colloid layer of a substantially transparent image receiver element, and b. fusing said toner particles to said hydrophilic colloid layer by contacting said toned image-bearing layer with a surface of a heated fuser roller coated with a silicon-containing release liquid which inhibits offsetting of said toner particles onto said fuser surface.
Claim 14
Dependent Claim
74 words
An electrographic copy process for forming a projection-viewable transparency comprising a. forming a toned image of fusible toner particles on an image-receiving hydrophilic colloid layer of a substantially transparent image receiver element, and b. fusing said toner particles to said hydrophilic colloid layer by contacting said toned image-bearing layer with a surface of a heated fuser roller coated with a silicon-containing release liquid which inhibits offsetting of said toner particles onto said fuser surface.
Claim 15
Dependent Claim
25 words
The process of claim 12 wherein said fuser roller is heated to a temperature in the range from about 320° F. to about 400° F.
Claim 16
Dependent Claim
20 words
The process of claim 13 wherein said temperature is in the range from about 340° F. to about 375° F.
Claim 17
Dependent Claim
15 words
The process of claim 12 wherein said image receiver element comprises a polyester film support.
Claim 18
Dependent Claim
16 words
The process of claim 12 wherein said image receiver element comprises a polyethylene terephthalate film support.
Claim 19
Dependent Claim
23 words
The process of claim 12 wherein said image receiver element comprises an antistatic layer on the surface opposite to said hydrophilic colloid layer.
Claim 20
Dependent Claim
13 words
The process of claim 17 wherein said antistatic layer contains a matte agent.
Claim 21
Dependent Claim
11 words
A projection-viewable transparency prepared according to the process of claim 1.
Claim 22
Dependent Claim
11 words
A projection-viewable transparency prepared according to the process of claim 3.
Claim 23
Dependent Claim
11 words
A projection-viewable transparency prepared according to the process of claim 4.
Claim 24
Dependent Claim
11 words
A projection-viewable transparency prepared according to the process of claim 12.
References Cited (Backward Citations)
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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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |