Patent US3628979A successfully refreshed from Google Patents.
US3628979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer elements and method of making same
Assignee: Columbia Ribbon and Carbon Manufacturing Co Inc
•
Filing: 1968-06-20
•
Granted: 1971-12-21
•
Expires: 1988-06-20
Abstract
Abstract The manufacture of novel pressure-sensitive transfer elements of the squeezeout type which are cleaner to the touch and resistant to producing typewriter roller marks on the copy sheet. The inkreleasing surface of a squeezeout-type ink layer is printed with a very thin layer of a composition comprising a dilute volatile solvent solution of a synthetic thermoplastic resin and a minor amount of a liquid oily material which is incompatible with said resin but which is compatible with the ink vehicle in the squeezeout layer. The volatile solvent is also at least a partial solvent for the resin binder of the squeezeout layer.
Inventors
- 👤 Douglas A Newman
- 👤 Allan T Schlotzhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:04
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/1246; 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: 7
Claim 1
Independent Claim
33 words
The process of claim 1 in which said supercoating composition comprises from about 0.3 to about 0.5 parts by weight of said liquid oily material per 1 part by weight of said resin.
Claim 2
Dependent Claim
21 words
The process of claim 1 in which the synthetic resins of the ink layer and the supercoating composition comprise acrylic resins.
Claim 3
Dependent Claim
35 words
The process of claim 1 in which the supercoating composition also comprises a wetting agent which reduces the surface tension of the composition and permits the application of a thin supercoating layer of increased uniformity.
Claim 4
Dependent Claim
158 words
A pressure-sensitive typewriter carbon of the squeezeout type, which is clean to the touch and resistant to exuding ink under the effects of roller pressures less than imaging pressure, which comprises a flexible plastic film foundation having thereon an ink layer of pressure nontransferable microporous synthetic thermoplastic resin containing with the pores thereof a pressure-exudable ink comprising an oleaginous vehicle and coloring matter, and having bonded to said layer a thin pressure nontransferable supercoating having a thickness of from 0.05 point to 0.5 point consisting essentially of 1 part by weight of a synthetic thermoplastic resin and from 0.3 part to 0.8 part by weight of a liquid oily material which is incompatible with said resin and is compatible with said pressure-exudable ink and which is uniformly dispersed in said supercoating in the form of droplets which transmit ink from said ink layer under the effects of imaging pressure but have no color transfer value of their own.
Claim 5
Dependent Claim
23 words
A transfer element according to claim 5 in which the synthetic resins of the ink layer and of the supercoating comprise acrylic resins.
Claim 6
Dependent Claim
24 words
A transfer element according to claim 5 in which the supercoating has a weight of from about 0.01 to about 0.05 pounds per ream.
Claim 7
Dependent Claim
16 words
A transfer element according to claim 7 in which the supercoating also comprises a wetting agent.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |