US3730091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image transfer layers for infrared transfer
Assignee: Bell and Howell Co
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Filing: 1970-10-23
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Granted: 1973-05-01
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Expires: 1990-10-23
Abstract
Abstract An improved image resolution in thermo-transfer duplicating processes is accomplished by means of dispersing a plurality of thermally conductive particles in the dye-wax layer of transfer material used in such processes and applying an electrical or magnetic field to the transfer material layer sufficient to orient and align the particles parallel to the direction of the field. In this way the improved dye-wax layer of transfer material is capable of greater thermal conductivity in the direction transverse to the layer than in the lateral direction of the layer.
Inventors
- 👤 J Gaynor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:59
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/392; B41M5/025; B41M5/04; B41M5/38285
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
51 words
The layered construction of claim 1 wherein said transfer material contains a plurality of uniformly dispersed thermally conductive particles responsive to applied electromagnetic fields selected from the group of metals and metal oxides consisting of copper, silver, iron, nickel, cobalt, iron oxide, copper oxide, manganese dioxide, nickel oxide, and magnesium oxide.
Claim 2
Dependent Claim
18 words
The layered construction of claim 1 wherein said transfer material is a composition comprising dye, wax and oil.
Claim 3
Dependent Claim
27 words
The layered construction of claim 3 wherein the lateral particle frequence of said particles contained in said transfer material is at least about 10 particles per millimeter.
Claim 4
Dependent Claim
23 words
The layered composition of claim 1 wherein the length of said particles is less than the thickness of said layer of transfer material.
Claim 5
Dependent Claim
19 words
The layered composition of claim 5 wherein the thickness of said layer of transfer material is about 0.5 mils.
Claim 6
Dependent Claim
23 words
The layered construction of claim 1 wherein said transfer material has greater optical transparency in said transverse direction than in said lateral direction.
Claim 7
Dependent Claim
34 words
The layered construction of claim 1 wherein said particles have a substantially greater thermal conductivity than the remainder of said transfer material and are aligned transversely with respect to said layer of transfer material.
Claim 8
Dependent Claim
27 words
The layered construction in accordance with claim 8 wherein said transfer material is thermally responsive in a transverse direction and substantially unresponsive thermally in a lateral direction.
Claim 9
Dependent Claim
24 words
The layered construction in accordance with claim 8 wherein thermal transfer through said transfer material is effected substantially entirely in a transverse direction therethrough.
Claim 10
Dependent Claim
30 words
The layered construction in accordance with claim 8 wherein thermal transfer transversely through said transfer material is selectively effected through portions thereof occupied by said plurality of thermally conductive particles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |