US3884685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low density paper used in transfer electrophotography
Assignee: Xerox Corp
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Filing: 1973-12-06
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Granted: 1975-05-20
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Expires: 1993-12-06
Abstract
Abstract A lightweight electrophotographic copy paper having a low density bulking substance embedded in the paper fiber and a surface size comprising a salt, clay and binder composition is prepared. The lightweight electrophotographic copy paper has particular utility in electrophotographic machines because of its ability to feed properly and render non-scorched copies.
Inventors
- 👤 Jr Charles J Green
- 👤 George Treier
- 👤 Robert H Macclaren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:06
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0006; G03G7/0013; G03G7/006; G03G7/0073; G03G7/008
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
A METHOD OF ELECTROPHOGRAPHICALLY COPYING COMPRISING: A. CHARGING AN ELECTROPHOTOGRAPHIC PLATE; B. EXPOSING THE CHARGED ELECTROPHOGRAPHIC PLATE TO ACTIVATING RADIATION TO CREATE AN ELECTROSTATIC IMAGE; C. DEVELOPING THE RESULTING ELECTROSTATIC IMAGE WITH ELECTROSCOPIC MARKING PARTICLES; AND D. TRANSFERRING SAID DEVELOPED IMAGE TO AN ELELCTROPHOTOGRAPHIC COPY PAPER COMPRISING PAPER MAKING FIBERS HAVING INCORPORATED THEREIN A LOW DENSITY BULKING MATERIAL IN A PROPORTION OF UP TO ABOUT 10 PERCENT BY WEIGHT OF THE A PROPORTION OF UP TO ABOUT 10 PERCENT BY WEIGHT OF THE PAPER HAVING A COMPOSITION COMPRISING BINDER MATERIAL, A METALLIC SULFATE SALT WHICH IMPARTS CONDUCTIVITY TO THE PAPER, IN AN AMOUNT OF FROM ABOUT 1 TO 50 PERCENT BY WEIGHT BASED ON SAID BINDER, AND CLAY IN AN AMOUNT OF FROM ABOUT 40 TO 50 PERCENT OF THE TOTAL COMPOSITION, THE COMBINATION OF SALT AND CLAY NOT EXCEEDING 60 PERCENT OF THE TOTAL COMPOSITION.
Claim 2
Independent Claim
146 words
A METHOD OF ELECTROPHOGRAPHICALLY COPYING COMPRISING: A. CHARGING AN ELECTROPHOTOGRAPHIC PLATE; B. EXPOSING THE CHARGED ELECTROPHOGRAPHIC PLATE TO ACTIVATING RADIATION TO CREATE AN ELECTROSTATIC IMAGE; C. DEVELOPING THE RESULTING ELECTROSTATIC IMAGE WITH ELECTROSCOPIC MARKING PARTICLES; AND D. TRANSFERRING SAID DEVELOPED IMAGE TO AN ELELCTROPHOTOGRAPHIC COPY PAPER COMPRISING PAPER MAKING FIBERS HAVING INCORPORATED THEREIN A LOW DENSITY BULKING MATERIAL IN A PROPORTION OF UP TO ABOUT 10 PERCENT BY WEIGHT OF THE A PROPORTION OF UP TO ABOUT 10 PERCENT BY WEIGHT OF THE PAPER HAVING A COMPOSITION COMPRISING BINDER MATERIAL, A METALLIC SULFATE SALT WHICH IMPARTS CONDUCTIVITY TO THE PAPER, IN AN AMOUNT OF FROM ABOUT 1 TO 50 PERCENT BY WEIGHT BASED ON SAID BINDER, AND CLAY IN AN AMOUNT OF FROM ABOUT 40 TO 50 PERCENT OF THE TOTAL COMPOSITION, THE COMBINATION OF SALT AND CLAY NOT EXCEEDING 60 PERCENT OF THE TOTAL COMPOSITION.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the transfer step takes place by heat fixing.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein the transfer step takes place by pressure fixing.
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |