US4303749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single component magnetic toner with epoxy resin
Assignee: Xerox Corp
•
Filing: 1980-10-27
•
Granted: 1981-12-01
•
Expires: 2000-10-27
Abstract
Abstract This invention relates to a single component magnetic tone containing an epoxy resin and a magnetic pigment, particularly iron oxide pigments, which have been treated with surface reactive coupling materials, selected from organic titanates and lechithin, which treatment results in a magnetic toner where the melt flow temperature of such a toner is below 110° C., and preferably between about 90° C. and 105° C. Also described is a method for the development of magnetic images which involves causing the formation of a magnetic latent image on a magnetizable recording medium, developing the image with the above toner, followed by transferring the image to a suitable substrate, and subsequently permanently fusing the image to said substrate by heat.
Inventors
- 👤 Robert J. Gruber
- 👤 Steven B. Bolte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:12
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09775; G03G19/00; G03G9/083; G03G9/0839; G03G9/09708; G03G9/09716; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/104
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A single component magnetic toner, containing from about 30 percent to about 60 percent by weight of an epoxy resin, and from about 40 percent to about 70 percent by weight of a magnetic pigment treated with an organic titanate or lecithin reactive coupling agent, said toner having a melt flow temperature of from about 90° C., to about 110° C.
Claim 2
Dependent Claim
61 words
A single component magnetic toner, containing from about 30 percent to about 60 percent by weight of an epoxy resin, and from about 40 percent to about 70 percent by weight of a magnetic pigment treated with an organic titanate or lecithin reactive coupling agent, said toner having a melt flow temperature of from about 90° C., to about 110° C.
Claim 3
Independent Claim
129 words
A method for causing the development of magnetic images utilizing a single component magnetic toner, which comprises the formation of a magnetic latent image on a magnetizable recording medium, followed by developing the image with a single component toner containing an epoxy resin in an amount of from about 30 percent to about 60 percent by weight, and an iron oxide magnetic pigment present in an amount of from about 40 percent to about 70 percent by weight, which iron oxide has been treated with an organic titanate or lecithin reactive coupling agent, said toner having a melt flow temperature of from about 90° C. to about 110° C., followed by transferring the image to a suitable substrate, and subsequently permanently fusing the image to said substrate by heat.
Claim 4
Independent Claim
129 words
A method for causing the development of magnetic images utilizing a single component magnetic toner, which comprises the formation of a magnetic latent image on a magnetizable recording medium, followed by developing the image with a single component toner containing an epoxy resin in an amount of from about 30 percent to about 60 percent by weight, and an iron oxide magnetic pigment present in an amount of from about 40 percent to about 70 percent by weight, which iron oxide has been treated with an organic titanate or lecithin reactive coupling agent, said toner having a melt flow temperature of from about 90° C. to about 110° C., followed by transferring the image to a suitable substrate, and subsequently permanently fusing the image to said substrate by heat.
Claim 5
Dependent Claim
21 words
A toner in accordance with claim 1 wherein the magnetic pigment is an iron oxide, or mixtures of said iron oxides.
Claim 6
Dependent Claim
36 words
A toner in accordance with claim 3 wherein from about 40 to about 70 percent by weight of iron oxide is present, and about 30 to about 60 percent by weight of epoxy resin is present.
Claim 7
Dependent Claim
16 words
A toner in accordance with claim 1 wherein the reactive coupling agent is an organic titanate.
Claim 8
Dependent Claim
14 words
A toner in accordance with claim 1 wherein the reactive coupling agent is lecithin.
References Cited (Backward Citations)
US4105572A
Cited
DE2725963A1
Cited
US4230787A
Cited
US4192902A
Cited
US4218530A
Cited
US4176078A
Cited
JPS54155049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |