US3852069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Application of magnetic recording strips to motion picture film
Assignee: Agfa Gevaert NV
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Filing: 1973-12-03
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Granted: 1974-12-03
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Expires: 1993-12-03
Abstract
Abstract The adherence of a magnetic sound stripe to the surface of an anti-halation layer of a multi-layer motion picture film including a cellulose triacetate support and at least one lightsensitive emulsion layer is enhanced by using as the alkalisoluble binder of the anti-halation layer a polymer containing free carboxyl groups and including in the coating composition of the magnetic stripe an organic compound which contains at least two aziridine groups reactive with the polymer carboxyl groups.
Inventors
- 👤 Paesschen A Van
- 👤 J Herbots
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:14
CPC Classifications
G; G03; G03D; G03D15/00; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; G03C1/91; G11; G11B; G11B5/00; G11B5/62; G11B5/633; G11B5/74
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
MULTILAYER MOTIION PICTURE FILM MATERIAL COMPRISING A CELLULOSE TRIACETATE SUPPORT, AT LEAST ONE LIGHT-SENSITIVE EMULSION LAYER AND AT THE OPPOSITE SIDE OF SAID SUPPORT AN ANTIHALATION LAYER COMPRISING AN ALKALI-SOLUBLE POLYMERIC BINDER CONTAINING FREE CARBOXYL GROUPS AND CAPABLE OF BEING DETACHED FROM SAID SUPPORT IN THE PRESENCE OF AN ALKALINE MEDIUM, AND DEPOSITED UPON SAID ANTIHALATION LAYER STRIPES OF A COATING COMPOSITION OF MAGNETIZABLE MATERIAL DISPERSED IN AN ALKALI-INSOLUBLE BINDER IN ADMIXTURE WITH AN ORGANIC COMPOUND HAVING AT LEAST TWO AZIRIDINE GROUPS REACTIVE WITH THE CARBOXYL GROUPS OF SAID POLYMERIC BINDER.
Claim 2
Dependent Claim
91 words
MULTILAYER MOTIION PICTURE FILM MATERIAL COMPRISING A CELLULOSE TRIACETATE SUPPORT, AT LEAST ONE LIGHT-SENSITIVE EMULSION LAYER AND AT THE OPPOSITE SIDE OF SAID SUPPORT AN ANTIHALATION LAYER COMPRISING AN ALKALI-SOLUBLE POLYMERIC BINDER CONTAINING FREE CARBOXYL GROUPS AND CAPABLE OF BEING DETACHED FROM SAID SUPPORT IN THE PRESENCE OF AN ALKALINE MEDIUM, AND DEPOSITED UPON SAID ANTIHALATION LAYER STRIPES OF A COATING COMPOSITION OF MAGNETIZABLE MATERIAL DISPERSED IN AN ALKALI-INSOLUBLE BINDER IN ADMIXTURE WITH AN ORGANIC COMPOUND HAVING AT LEAST TWO AZIRIDINE GROUPS REACTIVE WITH THE CARBOXYL GROUPS OF SAID POLYMERIC BINDER.
Claim 3
Dependent Claim
42 words
Multilayer motion picture film material according to claim 1, wherein the alkali-soluble polymeric binder for said antihalation layer is cellulose acetate phthalate having a degree of acetyl substitution between 1.0 and 1.7 and a degree of phthalyl substitution between 0.6 and 1.2.
Claim 4
Dependent Claim
56 words
Multilayer motion picture film material according to claim 1, wherein the alkali-soluble binder for said antihalation layer is formed of a mixture of a copolymer of styrene and acrylic acid containing 30 percent by weight of acrylic acid and of a copolymer of vinyl acetate and crotonic acid containing 7.8 percent by weight of crotonic acid.
Claim 5
Dependent Claim
22 words
Multilayer motion picture film material according to claim 1, wherein the organic compound having at least two aziridine groups is tris(2-methyl-1-aziridinyl)-phosphinic oxide.
References Cited (Backward Citations)
US3220843A
Cited
US3243376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |