US4434207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation hardened lift-off correction medium and process of manufacture
Assignee: IBM Information Products Corp
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Filing: 1982-09-16
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Granted: 1984-02-28
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Expires: 2002-09-16
Abstract
Abstract A formula and process to manufacture a lift-off correction ribbon in which the bonding material layer is cured by ultraviolet radiation. The bonding material is not normally tacky, but bonds under impact. The radiation curing eliminates solvents and their associated handling and pollution problems. The preferred bonding material formula is primarily a mixture of dilinoleic acid and trimethylol propane triacrylate with an ultraviolet ionization initiator.
Inventors
- 👤 Terence E. Franey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/10; B41J; B41J29/00; B41J29/26; B41J29/36; B41J29/373; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/28; Y10T428/2852; Y10T428/2865; Y10T428/2878; Y10T428/2891; Y10T428/31504; Y10T428/31786; Y10T428/31855
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
47 words
A lift-off correction medium having a supporting substrate and a layer of bonding material supported on said substrate, said bonding material bonding to printed characters upon impact of said supporting substrate to effect lift-off correction, said bonding material comprising a polymerized triacrylate as a major solid material.
Claim 2
Dependent Claim
47 words
A lift-off correction medium having a supporting substrate and a layer of bonding material supported on said substrate, said bonding material bonding to printed characters upon impact of said supporting substrate to effect lift-off correction, said bonding material comprising a polymerized triacrylate as a major solid material.
Claim 3
Dependent Claim
15 words
The correction medium as in claim 1 in which said triacrylate is trimethylol propane triacrylate.
Claim 4
Dependent Claim
21 words
The correction medium as in claim 1 in which said bonding material also comprises a polyacidic acid of the fatty-acid type.
Claim 5
Dependent Claim
33 words
The correction medium as in claim 3 in which said polyacidic acid comprises at least thirty carbon atoms having at least one unsaturated site in a six member ring structure of carbon molecules.
Claim 6
Dependent Claim
16 words
The correction medium as in claim 4 in which said acid consists essentially of dilinoleic acid.
Claim 7
Dependent Claim
27 words
The correction medium as in claim 5 also comprising a diol diacrylate and an octyl polyethoxy ethanol, both providing compatability prior to curing, and an ultraviolet initiator.
Claim 8
Dependent Claim
15 words
The correction medium as in claim 3 in which said triacrylate is trimethylol propane triacrylate.
Claim 9
Dependent Claim
33 words
The correction medium as in claim 7 in which said polyacidic acid comprises at least thirty carbon atoms having at least one unsaturated site in a six member ring structure of carbon molecules.
Claim 10
Dependent Claim
27 words
The correction medium as in claim 8 also comprising a diol diacrylate and an octyl polyethoxy ethanol, both providing compatability prior to curing, and an ultraviolet initiator.
Claim 11
Dependent Claim
16 words
The correction medium as in claim 8 in which said acid consists essentially of dilinoleic acid.
Claim 12
Dependent Claim
27 words
The correction medium as in claim 10 also comprising a diol diacrylate and an octyl polyethoxy ethanol, both providing compatability prior to curing, and an ultraviolet initiator.
Claim 13
Dependent Claim
29 words
The correction medium as in claim 8 in which said acid is in the range of about 0.8 to 2.7 parts by weight of the weight of said acrylate.
Claim 14
Dependent Claim
27 words
The correction medium as in claim 12 also comprising a diol diacrylate and an octyl polyethoxy ethanol, both providing compatability prior to curing, and an ultraviolet initiator.
Claim 15
Dependent Claim
16 words
The correction medium as in claim 12 in which said acid consists essentially of dilinoleic acid.
Claim 16
Dependent Claim
27 words
The correction medium as in claim 14 also comprising a diol diacrylate and an octyl polyethoxy ethanol, both providing compatability prior to curing, and an ultraviolet initiator.
Claim 17
Dependent Claim
64 words
The correction medium as in claim 14 comprising in the order of magnitude of 56 parts by weight of said acid, at least 42 parts by weight being said dilinoleic acid, 32 parts by weight of said trimethylol propane triacetate, 5 parts by weight of said diol diacrylate, 7 parts by weight of said polyethoxy ethanol, and 2.5 parts by weight of said initiator.
Claim 18
Dependent Claim
52 words
A lift-off correction medium having a supporting substrate and a layer of bonding material supported on said substrate, said bonding material bonding to printed characters upon impact of said supporting substrate to effect lift-off correction, said bonding material comprising an ionizing-radiation-cured solid body material holding a polyacidic acid of the fatty-acid type.
Claim 19
Dependent Claim
52 words
A lift-off correction medium having a supporting substrate and a layer of bonding material supported on said substrate, said bonding material bonding to printed characters upon impact of said supporting substrate to effect lift-off correction, said bonding material comprising an ionizing-radiation-cured solid body material holding a polyacidic acid of the fatty-acid type.
Claim 20
Dependent Claim
33 words
The correction medium as in claim 17 in which said polyacidic acid comprises at least thirty carbon atoms having at least one unsaturated site in a six member ring structure of carbon molecules.
Claim 21
Dependent Claim
15 words
The correction medium as in claim 18 in which said acid has thirty-six carbon atoms.
Claim 22
Dependent Claim
14 words
The correction medium as in claim 19 in which said acid is dilinoleic acid.
References Cited (Backward Citations)
US3754966A
Cited
US3661618A
Cited
US3770490A
Cited
US3825470A
Cited
DE2412037A1
Cited
US4093772A
Cited
GB2006235A
Cited
US4312916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |