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Patent US4894306A successfully refreshed from Google Patents.
US4894306A
Expired / Lapsed
US
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Ion deposition printing paper
Assignee: Fort James Corp
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Filing: 1986-07-28
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Granted: 1990-01-16
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Expires: 2006-07-28
Abstract
Abstract Paper employed in an ion deposition printing process can be made antistatic by incorporating into the paper a composition comprising a water-soluble electrolytic salt, such as sodium sulfate, and a water-miscible organic solvent having a high boiling point, such as glycerine. Being antistatic, the paper does not acquire stray charges of static electricity that interfere with the printing process.
Inventors
- 👤 H. Herbert Schubring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:00
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/006; G03G7/0073; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G7/0066; Y; Y10; Y10T; Y10T428/00; Y10T428/31
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
97 words
In the ion deposition printing process wherein a digital signal is converted to an image in the form of an electrostatic charge which is transferred by ion deposition to a dielectric drum, and the image is developed by a toner which is fused to a sheet of paper, the improvement wherein the paper contains an antistatic composition comprising a water-soluble electrolytic salt and water-miscible organic solvent for the salt, the solvent having a boiling point greater than about 190° C., and the paper having a surface resistivity between about 10 9 and 10 12 ohms/cm 2 .
Claim 2
Dependent Claim
97 words
In the ion deposition printing process wherein a digital signal is converted to an image in the form of an electrostatic charge which is transferred by ion deposition to a dielectric drum, and the image is developed by a toner which is fused to a sheet of paper, the improvement wherein the paper contains an antistatic composition comprising a water-soluble electrolytic salt and water-miscible organic solvent for the salt, the solvent having a boiling point greater than about 190° C., and the paper having a surface resistivity between about 10 9 and 10 12 ohms/cm 2 .
Claim 3
Dependent Claim
32 words
The improvement of claim 1 wherein the paper contains between about 0.15 and 1.5 percent by weight of the salt and between about 0.07 and 0.7 percent by weight of the solvent.
Claim 4
Dependent Claim
25 words
The improvement of claim 1 wherein the paper has a surface sizing of starch and the improvement includes incorporating the antistatic composition in the sizing.
Claim 5
Dependent Claim
17 words
The improvement of claim 1 wherein the salt is sodium sulfate and the organic solvent is glycerine.
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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) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |