US5215874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic material having magnetic recording member
Assignee: Fujifilm Holdings Corp
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Filing: 1992-01-21
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Granted: 1993-06-01
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Expires: 2012-01-21
Abstract
Abstract A silver halide photographic material comprises a transparent support, at least one silver halide emulsion layer, and a magnetic recording film. The support and magnetic recording film are prepared by coextrusion of a polyester material containing no ferromagnetic powder and a polyester material containing a ferromagnetic powder. At least one polyester material preferably has a hydrophilic group in its structure or contains a hygroscopic material. Further, the above silver halide photographic material enclosed with a cylindrical cartridge and a magnetic recording sheet consisting of a polyester material and a polyester material with a hydrophilic group in its structure containing a ferromagnetic powder, are disclosed.
Inventors
- 👤 Yoshio Sakakibara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:40
CPC Classifications
G; G03; G03C; G03C11/00; G03C11/02; G03C1/00; G03C1/76; G03C1/795; G03C1/7954; G03C3/00; G11; G11B; G11B5/00; G11B5/62; G11B5/633; G03B; G03B2217/00; G03B2217/26; G03B2217/265; G03C5/00; G03C5/12; G03C5/14
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
48 words
A silver halide photographic material comprising a transparent support, at least one silver halide emulsion layer, and a magnetic recording film, wherein said support and magnetic recording film are prepared by coextrusion of a polyester material containing no ferromagnetic powder and a polyester material containing a ferromagnetic powder.
Claim 2
Dependent Claim
48 words
A silver halide photographic material comprising a transparent support, at least one silver halide emulsion layer, and a magnetic recording film, wherein said support and magnetic recording film are prepared by coextrusion of a polyester material containing no ferromagnetic powder and a polyester material containing a ferromagnetic powder.
Claim 3
Dependent Claim
24 words
The silver halide photographic material as claimed in claim 1, wherein at least one polyester material has a hydrophilic group in its molecular structure.
Claim 4
Dependent Claim
33 words
The silver halide photographic material as claimed in claim 2, wherein the hydrophilic group is a member selected from the group consisting of a hydroxyl group, an alkyleneoxide group and an ionic group.
Claim 5
Dependent Claim
24 words
The silver halide photographic, material as claimed in claim 1, wherein each of the polyester materials has a hydrophilic group in its molecular structure.
Claim 6
Dependent Claim
33 words
The silver halide photographic material as claimed in claim 4, wherein the hydrophilic group is a member selected from the group consisting of a hydroxyl group, an alkyleneoxide group and an ionic group.
Claim 7
Dependent Claim
26 words
The silver halide photographic material as claimed in claim 1, wherein at least one of the support and the magnetic recording film contains a hygroscopic material.
Claim 8
Dependent Claim
43 words
The silver halide photographic material as claimed in claim 6, wherein the hygroscopic material is a member selected from the group consisting of polyacrylic acid, its derivatives, polymethacrylic acid, its derivatives, polyacrylamide, its derivatives, polystyrene sulfonate, its derivatives, polyethylene oxide and its derivatives.
Claim 9
Dependent Claim
33 words
The silver halide photographic material as claimed in claim 6, wherein the hygroscopic material is selected from the group consisting of silica, alumina, calcium carbonate, magnesium carbonate, kaolin, clay, talc and titanium dioxide.
Claim 10
Dependent Claim
83 words
The silver halide photographic material as claimed in claim 1, wherein the ferromagnetic powder is a member selected from the group of ferromagnetic needle powders of ferromagnetic iron oxide, ferromagnetic iron oxide containing Co, ferromagnetic metal and chromium dioxide, and has a mean particle size of 0.04 to 3.0 μm, a ratio of long diameter to short diameter of the particle size of 3 to 15 and a content of 0.01 to 1 gram per 1 m 2 of the magnetic recording film.
Claim 11
Dependent Claim
62 words
The silver halide photographic material as claimed in claim 1, wherein the ferromagnetic powder is a barium ferrite plate having a mean particle size of 0.04 to 3.0 μm, a ratio of long diameter to short diameter of the particle size of 3 to 15 and a content of 0.01 to 1 gram per 1 m 2 of the magnetic recording film.
Claim 12
Dependent Claim
47 words
The silver halide photographic material as claimed in claim 1, wherein the ferromagnetic powder is a cubic magnetite containing Co having a mean particle size of 0.05 to 1.0 μm and a content of 0.01 to 1 gram per 1 m 2 of the magnetic recording film.
Claim 13
Dependent Claim
71 words
A silver halide photographic material enclosed with a cylindrical cartridge, said silver halide photographic material comprising a transparent support, at least one silver halide emulsion layer and a magnetic recording film, and said cylindrical cartridge having a spool for winding the photographic material therearound, wherein said support and magnetic recording film are prepared by coextrusion of a polyester material containing no ferromagnetic powder and a polyester material containing a ferromagnetic powder.
Claim 14
Dependent Claim
71 words
A silver halide photographic material enclosed with a cylindrical cartridge, said silver halide photographic material comprising a transparent support, at least one silver halide emulsion layer and a magnetic recording film, and said cylindrical cartridge having a spool for winding the photographic material therearound, wherein said support and magnetic recording film are prepared by coextrusion of a polyester material containing no ferromagnetic powder and a polyester material containing a ferromagnetic powder.
Claim 15
Dependent Claim
29 words
The silver halide photographic material enclosed with a cylindrical cartridge as claimed in claim 12, wherein at least one polyester material has a hydrophilic group in its molecular structure.
Claim 16
Dependent Claim
31 words
The silver halide photographic material enclosed with a cylindrical cartridge as claimed in claim 12, wherein at least one of the support and the magnetic recording film contains a hygroscopic material.
Claim 17
Dependent Claim
24 words
The silver halide photographic material enclosed with a cylindrical cartridge as claimed in claim 12, wherein the cylindrical cartridge has a film feeding means.
Claim 18
Dependent Claim
29 words
The silver halide photographic material enclosed with a cylindrical cartridge as claimed in claim 15, wherein at least one polyester material has a hydrophilic group in its molecular structure.
Claim 19
Dependent Claim
31 words
The silver halide photographic material enclosed with a cylindrical cartridge as claimed in claim 15, wherein at least one of the support and the magnetic recording film contains a hygroscopic material.
Claim 20
Dependent Claim
50 words
A magnetic recording sheet comprising a support and a magnetic recording layer, wherein said support and magnetic recording film are prepared by coextrusion of a polyester material containing no ferromagnetic powder and a polyester material containing a ferromagnetic powder, the latter polyester material having a hydrophilic group in its structure.
Claim 21
Dependent Claim
50 words
A magnetic recording sheet comprising a support and a magnetic recording layer, wherein said support and magnetic recording film are prepared by coextrusion of a polyester material containing no ferromagnetic powder and a polyester material containing a ferromagnetic powder, the latter polyester material having a hydrophilic group in its structure.
Claim 22
Dependent Claim
42 words
The magnetic recording sheet as claimed in claim 8, the hydrophilic group is a member selected from the group consisting of a sulfonic acid group, a group derived from sulfonic acid, a phosphoric acid group and a group derived from phosphoric acid.
Claim 23
Dependent Claim
24 words
The magnetic recording sheet as claimed in claim 18, wherein said polyester material containing no ferromagnetic powder has a hydrophilic group in its structure.
Claim 24
Dependent Claim
42 words
The magnetic recording sheet as claimed in claim 20, wherein the hydrophilic group is a member selected from group consisting of a sulfonic acid group, a group derived from sulfonic acid, a phosphoric acid group and a group derived from phosphoric acid.
Claim 25
Dependent Claim
63 words
The magnetic recording sheet as claimed in claim 18, wherein said ferromagnetic powder is a member selected from the group consisting of ferromagnetic iron oxide, ferromagnetic iron oxide containing Co, ferromagnetic metal and chromium dioxide, and has a mean particle size of 0.04 to 3.0 μm and a ratio of long diameter to short diameter of the particle size of 2 to 15.
Claim 26
Dependent Claim
28 words
The magnetic recording sheet as claimed in claim 18, wherein said ferromagnetic powder is a barium ferrite plate having a mean particle size of 0.04 to 3.0 μm.
Claim 27
Dependent Claim
46 words
The magnetic recording sheet as claimed in claim 18, wherein the ferromagnetic powder is a cubic magnetite containing Co having a mean particle size of 0.05 to 1.0 μm and a content of 0.01 to 1 gram per 1 m 2 of the magnetic recording film.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |