Patent US5847738A successfully refreshed from Google Patents.
US5847738A
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Process for applying protective overcoat on printed media
Assignee: Eastman Kodak Co
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Filing: 1997-07-11
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Granted: 1998-12-08
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Expires: 2017-07-11
Abstract
Abstract A process of forming an overcoat on a printed image to provide improved stability comprising: a) applying an image layer on a substrate using a liquid ink to form an imaged element; b) either charging the imaged element to a given polarity or applying a voltage across the surface of the element which is attracted to a conductive surface behind the element; c) applying colorless, charged particles to the element which causes them to be electrostatically attracted to the surface of the image layer; and d) heat-fusing the particles to obtain a protective overcoat over the entire surface of the image layer.
Inventors
- 👤 Lee W. Tutt
- 👤 Scott E. Tunney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:34
CPC Classifications
B; B41; B41M; B41M7/00; B41M7/0027
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
A process of forming an overcoat on a printed image to provide improved stability comprising the steps of: a) forming a liquid ink image on a substrate using an ink jet, offset or gravure process to form an imaged element; b) either charging said imaged element to a given polarity or applying a voltage across the surface of said element which is attracted to a conductive surface behind said element; c) applying colorless, charged particles to said element which causes the particles to be electrostatically attracted to the surface of said imaged element; and d) heat-fusing said particles to obtain a protective overcoat over the entire surface of said imaged element.
Claim 2
Dependent Claim
111 words
A process of forming an overcoat on a printed image to provide improved stability comprising the steps of: a) forming a liquid ink image on a substrate using an ink jet, offset or gravure process to form an imaged element; b) either charging said imaged element to a given polarity or applying a voltage across the surface of said element which is attracted to a conductive surface behind said element; c) applying colorless, charged particles to said element which causes the particles to be electrostatically attracted to the surface of said imaged element; and d) heat-fusing said particles to obtain a protective overcoat over the entire surface of said imaged element.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein said colorless particles comprise either a polyester or poly(styrene-co-butyl acrylate).
Claim 4
Dependent Claim
30 words
The process of claim 1 wherein step b) is performed by applying a voltage across the surface of said element which is attracted to a metal surface behind said element.
Claim 5
Dependent Claim
18 words
The process of claim 1 which further comprises the use of paper as the substrate in step a).
Claim 6
Dependent Claim
19 words
The process of claim 1 which further comprises the use of poly(vinyl chloride) as the substrate in step a).
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) | 2001-12-07 | 2002-06-08 | 2002-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-07 | 2006-06-08 | 2006-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-07 | 2010-06-08 | 2010-12-08 | $7700.00 | Window Closed / Lapsed |