US4256818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic or electrostatographic imaging and high speed fusing method uses polyamide resin in toner
Assignee: Xerox Corp
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Filing: 1979-11-05
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Granted: 1981-03-17
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Expires: 1999-11-05
Abstract
Abstract This invention is directed to new electrophotographic, and magnetic toners, which are useful for example in high speed fusing systems, these toners being comprised of a polyamide resin, a pigment or colorant, which pigment or colorant may be magnetic and as an optional ingredient, a carrier material. The polyamide resin is of the formula ##STR1## wherein R, R 1 , R 2 , and R 3 are radicals independently selected from aliphatic, substituted aliphatic, aromatic, substituted aromatic, cycloaliphatic, and heterocyclic, x is a number of from 1 to about 100, and y is a number of from 1 to about 100. In one preferred embodiment the toner composition is comprised of the polyamide resin and a high loading, 50-75 percent of a magnetic material, allowing for high speed fusing in magnetic imaging systems.
Inventors
- 👤 Daniel F. Blossey
- 👤 Peter F. Erhardt
- 👤 Charles G. Dickerson
- 👤 Donald S. Sypula
- 👤 James E. Kuder
- 👤 J. Kirk Swigert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:15
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08766; Y; Y10; Y10S; Y10S260/00; Y10S260/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
A method for developing electrostatographic images by causing the formation of an electrostatic latent image on a photoreceptor surface, followed by contacting the latent image with a developer composition comprised of an improved toner, and a carrier material, said improved toner consisting of a colorant, or pigment, and a polyamide resin of the formula: ##STR4## wherein R, R 1 , R 2 , and R 3 are independently selected from aliphatic radicals containing from about 1 to about 30 carbon atoms, aromatic radicals containing from 6 to about 24 carbon atoms and x is a number of from about 10 to about 35, y is a number of from about 10 to about 35, followed by transferring the developed image to a substrate and fusing the image to said substrate wherein fusing is accomplished at a rate of between about 20 inches per second to about 50 inches per second.
Claim 2
Independent Claim
150 words
A method for developing electrostatographic images by causing the formation of an electrostatic latent image on a photoreceptor surface, followed by contacting the latent image with a developer composition comprised of an improved toner, and a carrier material, said improved toner consisting of a colorant, or pigment, and a polyamide resin of the formula: ##STR4## wherein R, R 1 , R 2 , and R 3 are independently selected from aliphatic radicals containing from about 1 to about 30 carbon atoms, aromatic radicals containing from 6 to about 24 carbon atoms and x is a number of from about 10 to about 35, y is a number of from about 10 to about 35, followed by transferring the developed image to a substrate and fusing the image to said substrate wherein fusing is accomplished at a rate of between about 20 inches per second to about 50 inches per second.
Claim 3
Dependent Claim
152 words
An improved method for developing magnetic latent images by causing the formation of a magentic latent image on a suitable substrate, followed by contacting the image with a developer composition comprised of an improved magnetic toner and a carrier material, said improved toner consisting of a magnetic material and a polyamide resin of the formula ##STR5## wherein R, R 1 , R 2 , and R 3 , are independently selected from aliphatic radicals containing from about 1 to about 30 carbon atoms, aromatic radicals containing from 6 to about 24 carbon atoms, and x is a number of from about 10 to about 35, y is a number of from about 10 to about 35, followed by transferring the developed image to a substrate, and fusing the image to said substrate wherein fusing is accomplished at a rate of between about 20 inches per second to about 50 inches per second.
Claim 4
Dependent Claim
152 words
An improved method for developing magnetic latent images by causing the formation of a magentic latent image on a suitable substrate, followed by contacting the image with a developer composition comprised of an improved magnetic toner and a carrier material, said improved toner consisting of a magnetic material and a polyamide resin of the formula ##STR5## wherein R, R 1 , R 2 , and R 3 , are independently selected from aliphatic radicals containing from about 1 to about 30 carbon atoms, aromatic radicals containing from 6 to about 24 carbon atoms, and x is a number of from about 10 to about 35, y is a number of from about 10 to about 35, followed by transferring the developed image to a substrate, and fusing the image to said substrate wherein fusing is accomplished at a rate of between about 20 inches per second to about 50 inches per second.
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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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |