US4864451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible disk jacket
Assignee: Fujifilm Holdings Corp
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Filing: 1987-08-20
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Granted: 1989-09-05
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Expires: 2007-08-20
Abstract
Abstract A flexible disk jacket for accommodating therein a disk-like magnetic recording medium to form a flexible disk is formed by folding and bonding a plastic sheet into a bag-like shape. The plastic sheet is of a composite sheet material formed by laminating an outer layer and an inner layer respectively consisting of at least one plastic layer. The outer layer is colored and has heat sealability and antistatic properties. The inner layer has heat sealability.
Inventors
- 👤 Masakazu Iwasa
- 👤 Kazuhiko Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:22
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/033; G11B23/0332; G11B23/50; G11B23/505
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
A flexible disk jacket or a flexible disk formed by folding and bonding a plastic sheet to itself into a bag-like shape wherein said plastic sheet comprises an outer layer and an inner layer bonded together, the outer and inner layers respectively consisting of at least one plastic layer, the outer layer being colored by pigments selected from the group consisting of yellow-orange pigments, red pigments, blue-green-violet pigments and white pigments by at least one pigments selected from the group consisting of chromatic color pigments and white pigments and having heat sealability to said inner layer and antistatic properties, and the inner layer having a layer of adhesive, whereby the inner layer has heat sealability to said outer layer.
Claim 2
Dependent Claim
119 words
A flexible disk jacket or a flexible disk formed by folding and bonding a plastic sheet to itself into a bag-like shape wherein said plastic sheet comprises an outer layer and an inner layer bonded together, the outer and inner layers respectively consisting of at least one plastic layer, the outer layer being colored by pigments selected from the group consisting of yellow-orange pigments, red pigments, blue-green-violet pigments and white pigments by at least one pigments selected from the group consisting of chromatic color pigments and white pigments and having heat sealability to said inner layer and antistatic properties, and the inner layer having a layer of adhesive, whereby the inner layer has heat sealability to said outer layer.
Claim 3
Dependent Claim
20 words
A flexible disk jacked as defined in claim 1 in which the outer surface of the outer layer is grained.
Claim 4
Dependent Claim
55 words
A flexible disk jacket as defined in claim 1 in which the inner layer has light shielding properties provided by the addition to said inner layer of at least one inorganic pigment selected from the group consisting of carbon, graphite, titanium oxide and red oxide, or dyes having an absorption ban in the visible range.
Claim 5
Dependent Claim
113 words
A flexible disk jacket for a flexible disk formed by folding and bonding a plastic sheet to itself into a bag-like shape wherein said plastic sheet comprises an outer layer and an inner layer bonded together, the outer and inner layers respectively consisting of at least one plastic layer, the outer layer being colored by at least one pigment selected from the group consisting of chromatic color pigments and white pigments and having heat sealability to said inner layer and antistatic properties, and the inner layer having a layer of polymer which is the same as the polymer of the outer layer, whereby the inner layer has heat sealability to said outer layer.
Claim 6
Dependent Claim
113 words
A flexible disk jacket for a flexible disk formed by folding and bonding a plastic sheet to itself into a bag-like shape wherein said plastic sheet comprises an outer layer and an inner layer bonded together, the outer and inner layers respectively consisting of at least one plastic layer, the outer layer being colored by at least one pigment selected from the group consisting of chromatic color pigments and white pigments and having heat sealability to said inner layer and antistatic properties, and the inner layer having a layer of polymer which is the same as the polymer of the outer layer, whereby the inner layer has heat sealability to said outer layer.
Claim 7
Dependent Claim
20 words
A flexible disk jacket as defined in claim 4 in which the outer surface of the outer layer is grained.
Claim 8
Dependent Claim
55 words
A flexible disk jacket as defined in claim 4 in which the inner layer has light shielding properties provided by the addition to said inner layer of at least one inorganic pigment selected from the group consisting of carbon, graphite, titanium oxide and red oxide, or dyes having an absorption ban in the visible range.
References Cited (Backward Citations)
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Cited
US4251843A
Cited
US4413298A
Cited
US4510546A
Cited
US4501357A
Cited
US4479579A
Cited
US4485421A
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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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |