US4126565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toners for color flash fusers containing a permanent colorant and a heat sensitive dye
Assignee: Xerox Corp
•
Filing: 1976-12-27
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Granted: 1978-11-21
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Expires: 1996-12-27
Abstract
Abstract A toner and imaging system wherein the utilized toner is composed of a permanent colorant of the final color desired and additionally contains heat sensitive dye that darkens the color of the toner so that it more efficiently absorbs heat during flash fusing but then decomposes, becoming colorless, to leave an image the color of the permanent colorant.
Inventors
- 👤 Myron J. Lenhard
- 👤 James D. Rees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:17
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0926; G03G9/0928
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
30 words
A developer comprising carrier particles and toner particles wherein said toner comprises resin, permanent colorant and heat sensitive dye wherein said dye upon heating decomposes to form substantially colorless products.
Claim 2
Dependent Claim
30 words
A developer comprising carrier particles and toner particles wherein said toner comprises resin, permanent colorant and heat sensitive dye wherein said dye upon heating decomposes to form substantially colorless products.
Claim 3
Dependent Claim
26 words
The developer of claim 1 wherein said heat sensitive dye is also light sensitive and decomposes to substantially colorless products upon exposure to light and heat.
Claim 4
Dependent Claim
19 words
The developer of claim 1 wherein said heat sensitive dye bleaches to become substantially colorless when exposed to heat.
Claim 5
Dependent Claim
12 words
The developer of claim 1 wherein said permanent colorant comprises a pigment.
Claim 6
Dependent Claim
26 words
The developer of claim 1 wherein said heat sensitive dye is selected from the group comprising 1-ethoxy-3'-ethyl-2-pyridothiacyanine tetrafluoroborate, 3'-ethyl-1-methoxy-2-pyridothiacarbocyanine perchlorate, 3'-ethyl-1-methoxy 4',5'-benzo-2-pyridothiacarbocyanine tetrafluoroborate and mixtures thereof.
Claim 7
Dependent Claim
38 words
The developer of claim 1 wherein said permanent colorants comprise one of cyan, magenta or yellow and said heat sensitive dye is comprised of a mixture of the remaining two colors of the cyan, magenta and yellow group.
Claim 8
Dependent Claim
12 words
The developer of claim 1 wherein said heat sensitive dye is black.
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Cited
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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) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |