US4296176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inks for pulsed electrical printing
Assignee: Epp Corp
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Filing: 1979-12-11
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Granted: 1981-10-20
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Expires: 1999-12-11
Abstract
Abstract A printing ink comprises particles of small size, each having a body portion consisting of a fusible resin and a colorant and electrically conductive material situated substantially entirely on the surface of the body portion. The particles may be formed by a variety of methods. The body portion may have a magnetizable constituent for use in printers with magnetic ink orientation. The particles may be formed by spray drying to produce hollow beads.
Inventors
- 👤 Donald J. J. Lennon
- 👤 John R. Hagerstrom
- 👤 C. Frederick W. Ekman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:26
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/52; G; G03; G03G; G03G9/00; G03G9/08; G03G9/0825; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
A printing ink comprising particles each having a body of fusible resin with a colorant dispersed therein, said body being about two to ten microns in size, and an electrically conductive coating comprising a second resin with finely divided electrically conductive particles dispersed therein, said particles being in sufficiently close mutual proximity for continuous electrical conduction therebetween within said coating, said coating being substantially entirely situated on the surface of said body, adhering thereto, said printing ink having a volume resistivity of from 10 to 10 3 ohm cm. measured at between one and two volts per cm.
Claim 2
Dependent Claim
98 words
A printing ink comprising particles each having a body of fusible resin with a colorant dispersed therein, said body being about two to ten microns in size, and an electrically conductive coating comprising a second resin with finely divided electrically conductive particles dispersed therein, said particles being in sufficiently close mutual proximity for continuous electrical conduction therebetween within said coating, said coating being substantially entirely situated on the surface of said body, adhering thereto, said printing ink having a volume resistivity of from 10 to 10 3 ohm cm. measured at between one and two volts per cm.
Claim 3
Dependent Claim
17 words
A printing ink according to claim 1, in which the electrically conductive particles consist essentially of carbon.
Claim 4
Dependent Claim
16 words
A printing ink according to claim 1, in which the particles are beads of hollow form.
References Cited (Backward Citations)
US3080251A
Cited
US3196032A
Cited
US3563734A
Cited
US3503783A
Cited
US3550153A
Cited
US3639245A
Cited
US3674736A
Cited
US3965022A
Cited
US4082681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |