Patent US4003743A successfully refreshed from Google Patents.
US4003743A
Expired / Lapsed
US
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Process for production of motion picture film with sound track containing p-toluenesulfonic acid and glacial acetic acid
Assignee: Fujifilm Holdings Corp
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Filing: 1975-05-19
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Granted: 1977-01-18
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Expires: 1995-05-19
Abstract
Abstract A magnetic sound track layer can be formed with good adherence on the emulsion layer of a photographic material for motion picture film by coating from a liquid composition comprising ferromagnetic powders, a binder, and at least 1% by weight, based on the weight of said ferromagnetic powders, of p-toluenesulfonic acid and at least 3% by weight, based on the weight of said powder of glacial acetic acid. A motion picture film where the magnetic sound track contains p-toluenesulfonic acid and glacial acetic acid.
Inventors
- 👤 Goro Akashi
- 👤 Masaaki Fujiyama
- 👤 Akira Kasuga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:44
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/12; G03C5/14; G11; G11B; G11B5/00; G11B5/62; G11B5/633; Y; Y10; Y10S; Y10S430/00; Y10S430/135
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
120 words
In a motion picture film comprising a support having coated thereon (1) a photographic emulsion layer having as its main component a hydrophilic component and containing at least one silver halide and (2) an oleophilic magnetic sound track coated on said emulsion layer, said sound track comprising a film-forming polymeric material and containing one or more ferromagnetic powders, the improvement wherein the sound track contains p-toluene sulfonic acid present in an amount of 3 to 60 parts by weight based on 300 parts by weight of said ferromagnetic powders, and wherein said sound track also contains glacial acetic acid present in an amount of at least 9 parts by weight based on 300 parts by weight of said ferromagnetic powders.
Claim 2
Dependent Claim
120 words
In a motion picture film comprising a support having coated thereon (1) a photographic emulsion layer having as its main component a hydrophilic component and containing at least one silver halide and (2) an oleophilic magnetic sound track coated on said emulsion layer, said sound track comprising a film-forming polymeric material and containing one or more ferromagnetic powders, the improvement wherein the sound track contains p-toluene sulfonic acid present in an amount of 3 to 60 parts by weight based on 300 parts by weight of said ferromagnetic powders, and wherein said sound track also contains glacial acetic acid present in an amount of at least 9 parts by weight based on 300 parts by weight of said ferromagnetic powders.
Claim 3
Dependent Claim
37 words
The motion picture film as claimed in claim 1, wherein said glacial acetic acid is present in an amount of from 40 to 350 parts by weight based on 300 parts by weight of said ferromagnetic powders.
Claim 4
Dependent Claim
37 words
A motion picture film as claimed in claim 1, wherein said film-forming polymeric material is present in an amount of from 50 to 220 parts by weight based on 300 parts by weight of said ferromagnetic powders.
Claim 5
Dependent Claim
22 words
The motion picture film of claim 1, wherein said film-forming polymeric material has a molecular weight from about 200 to about 5000.
Claim 6
Dependent Claim
21 words
The motion picture film of claim 1, wherein said ferromagnetic powders are from 0.05 to 1 micron in average particle size.
Claim 7
Dependent Claim
23 words
The motion picture film of claim 1, wherein said magnetic sound track is from about 3 to about 20 microns thick when dried.
Claim 8
Dependent Claim
102 words
A process for producing a motion picture film comprising a support having coated thereon at least one silver halide emulsion layer with a magnetic sound track which comprises coating a predetermined part of the silver halide emulsion layer with a sound track-forming liquid composition comprising ferromagnetic powders, a film-forming polymeric material, 3 to 60 parts by weight, based on 300 parts by weight of said ferromagnetic powders, of p-toluenesulfonic acid, and at least 9 parts by weight, based on 300 parts by weight of said ferro-magnetic powders, of glacial acetic acid, and then drying the coating to form a magnetic sound track.
Claim 9
Dependent Claim
102 words
A process for producing a motion picture film comprising a support having coated thereon at least one silver halide emulsion layer with a magnetic sound track which comprises coating a predetermined part of the silver halide emulsion layer with a sound track-forming liquid composition comprising ferromagnetic powders, a film-forming polymeric material, 3 to 60 parts by weight, based on 300 parts by weight of said ferromagnetic powders, of p-toluenesulfonic acid, and at least 9 parts by weight, based on 300 parts by weight of said ferro-magnetic powders, of glacial acetic acid, and then drying the coating to form a magnetic sound track.
Claim 10
Dependent Claim
29 words
The process of claim 7, wherein said glacial acetic acid is present in 40 to 350 parts by weight, based on 300 parts by weight of said ferromagnetic powders.
Claim 11
Dependent Claim
33 words
The process of claim 7, wherein said film-forming polymeric material is present in an amount of from 50 to 220 parts by weight, based on 300 parts by weight of said ferro-magnetic powder.
Claim 12
Dependent Claim
21 words
The process of claim 7, wherein said film-forming polymeric material has a molecular weight of from about 200 to about 5000.
Claim 13
Dependent Claim
19 words
The process of claim 7, wherein said ferromagnetic powders are from 0.05 to 1 micron in average particle size.
Claim 14
Dependent Claim
32 words
The process of claim 7, wherein said liquid composition comprises 400 to 1500 parts by weight, based on 300 parts by weight of said ferromagnetic powder, of one or more organic solvents.
Claim 15
Dependent Claim
21 words
The process of claim 7, wherein said magnetic sound track is from about 3 to about 20 microns thick when dried.
References Cited (Backward Citations)
US3713887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |