EP0236100A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Disk cartridge
Assignee: Maxell Ltd
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Filing: 1987-02-27
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Granted: —
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Expires: 2007-02-27
Abstract
Abstract A shutter (6) for a disk cartridge (1) comprises a pair of upper and lower side plates of substantially same shape, juxtaposed to each other, and an end plate connected to the upper and lower side plates at one end, and integrally molded from a compound plastic containing a filler and a lubricant having a melt index of 30 to 60. The upper and lower side plates each have a thickness of not more than 1.0 mm and a ratio of the thickness to the surface area of the upper and lower side plates each of 1/5,000 to 1 /500. The shutter (6) can be molded at a low cost with a good moldability, and has high mechanical strength, heat resistance and slidability.
Inventors
- 👤 Yoshitake Kato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 01:46
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B23/033; G11B23/0332; G11B23/0301; G11B23/0308
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
18 words
A disk cartridge which comprises a shutter of low thickness, molded from a compound plastic containing a filler.
Claim 2
Dependent Claim
18 words
A disk cartridge which comprises a shutter of low thickness, molded from a compound plastic containing a filler.
Claim 3
Dependent Claim
14 words
A disk cartridge according to Claim 1, wherein the filler is a reinforcing filler.
Claim 4
Dependent Claim
25 words
A disk cartridge according to Claim 1 or 2, wherein 5 to 30 % by weight of the filler is contained in the compound plastic.
Claim 5
Dependent Claim
22 words
A disk cartridge according to Claim 1, 2 or 3, wherein the compound plastic has a melt index of 30 to 60.
Claim 6
Dependent Claim
21 words
A disk cartridge which comprises a shutter of low thickness molded from a compound plastic containing a filler and a lubricant.
Claim 7
Dependent Claim
21 words
A disk cartridge which comprises a shutter of low thickness molded from a compound plastic containing a filler and a lubricant.
Claim 8
Dependent Claim
58 words
A disk cartridge according to Claim 5, wherein the compound plastic comprises a thermoplastic as a base material, 5 to 30 % by weight of the filler incapable of being melted at a molding temperature, and 0.1 to 10 % by weight of the lubricant and has a melt index of 30 to 60 in a molten state.
Claim 9
Dependent Claim
109 words
A disk cartridge which comprises a case having head insert openings and a shutter slidably provided on the case to open or case the head insert openings, the shutter comprising a pair of upper and lower side plates of substantially same shape, juxtaposed to each other, and an end plate connected to the upper and lower side plates at one end, and integrally molded from a compound plastic containing a filler, the upper and lower side plates each having a thickness of not more than 1.0 mm and a ratio of the thickness to the surface area of the upper and lower side plates each of 1/5,000 to 1/500.
Claim 10
Dependent Claim
109 words
A disk cartridge which comprises a case having head insert openings and a shutter slidably provided on the case to open or case the head insert openings, the shutter comprising a pair of upper and lower side plates of substantially same shape, juxtaposed to each other, and an end plate connected to the upper and lower side plates at one end, and integrally molded from a compound plastic containing a filler, the upper and lower side plates each having a thickness of not more than 1.0 mm and a ratio of the thickness to the surface area of the upper and lower side plates each of 1/5,000 to 1/500.
References Cited (Backward Citations)
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