Patent US3715219A successfully refreshed from Google Patents.
US3715219A
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Electrostatically improvement in electo static printing
Assignee: AT&T Teletype Corp
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Filing: 1969-09-23
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Granted: 1973-02-06
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Expires: 1989-09-23
Abstract
Abstract An ink having a resistivity in the range of 106 to 1011 ohmcentimeters and a viscosity in a range with an upper limit of about 50 centipoises synchronously is formed into a uniform succession of ink drops in response to an alternating current. A stream of the ink drops is electrostatically drawn across and deflected in a span between the ink source and a carrier for printing thereon by drop impingement. The ink is a composition having about 3 percent by weight of a dye material and the remainder a vehicle comprised of at least one alcohol of the paraffin series which has the general formula CH3(CH2)nCH2OH in which n is an integer between 12 and 16.
Inventors
- 👤 P Kurz
- 👤 L Nash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:01
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/36; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/02; B41J2/025; B41J2/17; B41J2/195
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
In an ink-jet printing process wherein an ink stream is formed into a succession of printing drops, the improvement characterized by a hot melt ink composition vibratile in a fluid phase synchronously with an alternating current for printing electrostatically, the ink composition consisting essentially of a dye material in an amount of not more than 3 percent by weight and a vehicle selected from a class of compounds having the general formula CH3(CH2)nCH2OH in which n is an integer between 12 and 16.
Claim 2
Dependent Claim
83 words
In an ink-jet printing process wherein an ink stream is formed into a succession of printing drops, the improvement characterized by a hot melt ink composition vibratile in a fluid phase synchronously with an alternating current for printing electrostatically, the ink composition consisting essentially of a dye material in an amount of not more than 3 percent by weight and a vehicle selected from a class of compounds having the general formula CH3(CH2)nCH2OH in which n is an integer between 12 and 16.
Claim 3
Dependent Claim
49 words
A combination according to claim 1 wherein the ink constituents are proportioned such that, in the fluid phase, the viscosity of the ink is in a range having an upper limit of 50 centipoises and the resistivity of the ink is in the range of 106 to 1011 ohm-centimeters.
Claim 4
Dependent Claim
12 words
A combination according to claim 2 wherein the dye material is black.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |