US3617328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer elements and method of making same
Assignee: Columbia Ribbon and Carbon Manufacturing Co Inc
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Filing: 1967-09-25
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Granted: 1971-11-02
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Expires: 1987-09-25
Abstract
Abstract Pressure-sensitive transfer elements of the squeezeout type which are rendered cleaner to the touch and resistant to producing typewriter roller marks on the copy sheet by covering the ink-releasing surface of such transfer elements with a very thin porous layer of thermoplastic resin particles which are fused to each other and to the ink layer to provide an inkpermeable protective layer over the ink layer.
Inventors
- 👤 Douglas A Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:33
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/10; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249996; Y10T428/25; Y10T428/254; Y10T428/26; Y10T428/266; Y10T428/269; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
51 words
The process of claim 1 in which the resin particles are provided over the ink-releasing surface by applying them as a dispersion in a volatile vehicle which is a nonsolvent for the resin of the ink layer, and heat is applied to evaporate said vehicle and form said discrete, dry particles.
Claim 2
Dependent Claim
34 words
The process of claim 2 in which the dispersion of resin particles is applied in a thickness to provide a dried resin layer having a thickness of from about 0.0005 inch to 0.005 inch.
Claim 3
Dependent Claim
21 words
The process of claim 1 in which the synthetic resin of the ink layer and the resin particles comprise vinyl resins.
Claim 4
Dependent Claim
23 words
The process of claim 1 in which the resin particles are provided over the ink-releasing surface by applying them as discrete, dry particles.
Claim 5
Dependent Claim
181 words
A reusable pressure-sensitive transfer element of the squeezeout type, which is clean to the touch and resistant to exuding ink under the effects of pressure less than imaging pressure, which comprises an impervious flexible plastic film of polyethylene terephthalate polyester having on one surface thereof a thin receptive undercoating of vinyl resin and having on said undercoating a pressure-sensitive squeezeout-type ink layer comprising a pressure nontransferable microporous structure of synthetic thermoplastic resin containing within the pores thereof a pressure-exudable ink comprising an oily vehicle and coloring matter, and having heat-fused to the surface of said ink layer a thin porous fused particulate layer having a thickness of from about 0.0005 inch to about 0.01 inch consisting essentially of small, relatively uniform particles of thermoplastic resin which have been heated sufficiently to cause them to heat-fuse to particles in contact therewith without destroying the porosity of the layer and sufficiently to heat-fuse them to the surface of the ink layer whereby they are not transferable from the ink layer under the effects of imaging pressure during repeated reuse of the transfer element.
Claim 6
Dependent Claim
27 words
A transfer element according to claim 6 in which the synthetic resin of the ink layer and the thermoplastic resin of the particulate layer comprise vinyl resins.
Claim 7
Dependent Claim
18 words
A transfer element according to claim 6 in which the particulate layer of thermoplastic resin comprises polyvinyl chloride.
Claim 8
Dependent Claim
26 words
A transfer element according to claim 6 in which the particulate layer of thermoplastic resin has a thickness of from about 0.0005 inch to 0.01 inch.
Claim 9
Dependent Claim
23 words
A transfer element according to claim 9 in which the particulate layer has a thickness of from about 0.002 inch to 0.005 inch.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |