US3911160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of using resin powders to cure solvent-free inks
Assignee: Shamrock Chemicals Corp
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Filing: 1974-03-19
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Granted: 1975-10-07
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Expires: 1994-03-19
Abstract
Abstract The disclosure is concerned with a method of curing solvent-free inks by application of a powdered resin to a freshly printed surface. Powder, which does not adhere to the ink, is removed and the printed surface then is passed through a heating tunnel where the resin melts, thereby curing the ink. Optionally, the printed surface may be leveled mechanically following curing. Such leveling produces a higher gloss. Air pollution which normally is caused by solvent fumes in conventional processes is eliminated by this method. Moreover, heat energy is conserved as the need to vaporize a solvent and to carry-off the heated vapors is eliminated.
Inventors
- 👤 William B Neuberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:52
CPC Classifications
B; B41; B41M; B41M7/00; B41M7/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
IN A PRINTING PROCESS COMPRISING THE STEP OF APPLYING A SOLVENT-FREE OIL OR LIQUID INK TO A SURFACE, THE IMPROVEMENT COMPRISING: A. APPLYING A POWDER RESIN HAVING AN AVERAGE PARTICLE SIZE BETWEEN ABOUT 5-10 MIVRONS TO THE INKED SURFACE, AND B. CURING THE RESINATED INK TO PROVIDE A NON-RAISED PRINTED SURFACE WITH A THICKNESS BELOW ABOUT 7 MICRONS.
Claim 2
Dependent Claim
58 words
IN A PRINTING PROCESS COMPRISING THE STEP OF APPLYING A SOLVENT-FREE OIL OR LIQUID INK TO A SURFACE, THE IMPROVEMENT COMPRISING: A. APPLYING A POWDER RESIN HAVING AN AVERAGE PARTICLE SIZE BETWEEN ABOUT 5-10 MIVRONS TO THE INKED SURFACE, AND B. CURING THE RESINATED INK TO PROVIDE A NON-RAISED PRINTED SURFACE WITH A THICKNESS BELOW ABOUT 7 MICRONS.
Claim 3
Dependent Claim
26 words
The process of claim 1 comprising the additional step of providing said resin with about one-half to three percent powder by weight of a powdered wax.
Claim 4
Dependent Claim
19 words
The process of claim 1 in which said step of applying said resin to said surface is accomplished electrostatically.
Claim 5
Dependent Claim
19 words
The process of claim 1 in which said step of applying said resin to said surface is accomplished electrodynamically.
Claim 6
Dependent Claim
25 words
The process of claim 1 comprising the additional step of removing resin which does not adhere to the ink by blowing air across said surface.
Claim 7
Dependent Claim
36 words
A process of claim 1 in which said resin is thermoplastic and said curing step is accomplished by heating said surface to a temperature of about 50*F. to 150*F. above the melting point of said resin.
Claim 8
Dependent Claim
21 words
The process of claim 6 in which said step of heating is accomplished by passing said surface through a heating tunnel.
Claim 9
Dependent Claim
15 words
The process of claim 6 in which said heating step is accomplished by direct-flame heating.
Claim 10
Dependent Claim
15 words
The process of claim 6 in which said heating step is accomplished by infrared heating.
Claim 11
Dependent Claim
11 words
The process of claim 1 comprising the additional step of leveling.
Claim 12
Dependent Claim
19 words
The process of claim 1 in which said resin is thermosetting and said curing step is accomplished by polymerization.
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |