US4977475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lining member for the surface of a casing for a disc cartridge
Assignee: TDK Corp
•
Filing: 1989-03-23
•
Granted: 1990-12-11
•
Expires: 2009-03-23
Abstract
Abstract A disk cartridge includes upper and lower half casings to be assembled to form a hard casing, a magnetic disk held in the casing in a rotatable manner and lining members attached to the inner surfaces of the upper and lower half casings, wherein the lining member has a laminated structure which includes an attracting layer as a base layer for attracting dust and a smooth layer having a large number of apertures which is laminated on at least one surface of the base layer.
Inventors
- 👤 Haruo Shiba
- 👤 Masaru Ikebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:15
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/50; G11B23/505; G11B23/02; G11B23/03; G11B23/033; G11B23/0332
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A disk cartridge which comprises: upper and lower half casings assembled to form a hard casing for holding a magnetic disk in the casing in a rotatable manner; and lining members attached to inner surfaces of the upper and lower half casings, wherein one of said lining members has a laminated structure which comprises an attracting chargeable base layer for attracting dust and a net-like smooth layer and which includes rows and columns of spaced apart individual smooth layer members having a large number of apertures, which are laminated on at least one surface of the base layer.
Claim 2
Dependent Claim
98 words
A disk cartridge which comprises: upper and lower half casings assembled to form a hard casing for holding a magnetic disk in the casing in a rotatable manner; and lining members attached to inner surfaces of the upper and lower half casings, wherein one of said lining members has a laminated structure which comprises an attracting chargeable base layer for attracting dust and a net-like smooth layer and which includes rows and columns of spaced apart individual smooth layer members having a large number of apertures, which are laminated on at least one surface of the base layer.
Claim 3
Dependent Claim
22 words
The disk cartridge according to claim 1, wherein the smooth layer of said one of said lining members faces the magnetic disk.
Claim 4
Dependent Claim
15 words
The disk cartridge according to claim 1, wherein the attracting layer comprises a chargeable material.
Claim 5
Dependent Claim
14 words
The disk cartridge according to claim 1, wherein the attracting layer comprises polyester fibers.
Claim 6
Dependent Claim
34 words
The disk cartridge according to claim 1, wherein the smooth layer has a plurality of apertures formed therein and the attracting layer is positioned on said cartridge opposite a side of the magnetic disk.
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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) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |