US3950600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosensitive element, and its employ in the thermographic reproduction or record systems
Assignee: TIM SpA
•
Filing: 1974-07-08
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Granted: 1976-04-13
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Expires: 1994-07-08
Abstract
Abstract A temperature-responsive record material for use in a thermographic recording and reproducing apparatus comprising a supporting sheet carrying a single layer containing, as the temperature-sensitive composition, a mixture resulting by a dispersion of a basic chromogenic compound and of an acidic compound in a binder having as assential binding agent a latex or a mixture of a latex with a non-ionic cellulose ether.
Inventors
- 👤 Franco Knirsch
- 👤 Dino Lavagna
- 👤 Giorgio Rossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:20
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3372; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31888
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
81 words
In a temperature responsive record material comprising a supporting sheet having a single layer coated thereon comprising finely divided solid particles of a crystal violet lactone and finely divided particles of 4-4-isopropylidene-diphenol, wherein the improvement comprises having the particles dispersed in a binder matrix comprising a non-ionic cellulose ether mixed with a latex in a ratio of non-ionic cellulose ether to latex not greater than 3-97 parts by weight, the employ ratio of binding means/solids being variable from 1-1 to 1-25.
Claim 2
Dependent Claim
81 words
In a temperature responsive record material comprising a supporting sheet having a single layer coated thereon comprising finely divided solid particles of a crystal violet lactone and finely divided particles of 4-4-isopropylidene-diphenol, wherein the improvement comprises having the particles dispersed in a binder matrix comprising a non-ionic cellulose ether mixed with a latex in a ratio of non-ionic cellulose ether to latex not greater than 3-97 parts by weight, the employ ratio of binding means/solids being variable from 1-1 to 1-25.
Claim 3
Dependent Claim
20 words
In a record material according to claim 1, wherein said latex comprises a dispersion of vinyl chloride copolymer in water.
Claim 4
Dependent Claim
18 words
In a record material according to claim 1, wherein said latex comprises a dispersion of polystyrene in water.
Claim 5
Dependent Claim
19 words
In a record material according to claim 1, wherein said latex comprises a dispersion of styrene-butadiene copolymer in water.
Claim 6
Dependent Claim
19 words
In a record material according to claim 1, wherein said latex comprises a dispersion of styrene-butadiene carboxylate in water.
Claim 7
Dependent Claim
20 words
In a record material according to claim 1, wherein said latex comprises a dispersion of modified acrylic copolymer in water.
Claim 8
Dependent Claim
21 words
In a record material according to claim 1, wherein said latex comprises a dispersion of reticulated zinc acrylic copolymer in water.
Claim 9
Dependent Claim
20 words
In a record material according to claim 1, wherein said coating further comprises a white or lightly colored absorbing pigment.
Claim 10
Dependent Claim
16 words
In a record material according to claim 1, wherein said coating further comprises a lubricating agent.
Claim 11
Dependent Claim
21 words
In a record material according to claim 9, wherein said lubricating agent is a wax, a metal soap or a pigment.
Claim 12
Dependent Claim
21 words
In a record material according to claim 9, wherein said lubrication agent is a calcium, magnesium, silver, lithium or aluminum stearate.
Claim 13
Dependent Claim
17 words
In a record material according to claim 1, wherein said coating further comprises an optical whitening agent.
References Cited (Backward Citations)
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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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |