US4849840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carriage device for floppy disk apparatus having head arm with regulating material
Assignee: Toshiba Corp
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Filing: 1987-03-30
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Granted: 1989-07-18
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Expires: 2007-03-30
Abstract
Abstract A carriage device of a floppy disk apparatus includes a carriage main body arranged for linear movement and a head arm extending parallel to the main body. The body and arm are formed of synthetic resin. First and second magnetic heads are respectively mounted on the main body and head arm, so as to oppose each other. Regulating members are fixed to the main body and head arm, to prevent expansion and contraction thereof. Each regulating member is made of a material having a thermal expansion coefficient and hygroscopicity lower than those of the synthetic resin.
Inventors
- 👤 Toshiyuki Fujioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:17
CPC Classifications
G; G11; G11B; G11B21/00; G11B5/00; G11B5/48; G11B5/4806; G11B5/4833
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
A carriage device for a floppy disk apparatus, comprising: a carriage main body arranged for linear movement; first and second elongate head arms of a synthetic resin, supported by the carriage main body, and extending parallel to each other; a magnetic head mounted on one of the head arms; and regulating members fixed to the head arms, respectively, and extending in the direction of elongation of the head arm, said regulating members comprising means extending along a substantial portion of the length of the head arms for reinforcing the head arms and preventing expansion and contraction thereof, the regulating members being made of a material having a thermal expansion coefficient and hygroscopicity lower than those of the synthetic resin.
Claim 2
Dependent Claim
119 words
A carriage device for a floppy disk apparatus, comprising: a carriage main body arranged for linear movement; first and second elongate head arms of a synthetic resin, supported by the carriage main body, and extending parallel to each other; a magnetic head mounted on one of the head arms; and regulating members fixed to the head arms, respectively, and extending in the direction of elongation of the head arm, said regulating members comprising means extending along a substantial portion of the length of the head arms for reinforcing the head arms and preventing expansion and contraction thereof, the regulating members being made of a material having a thermal expansion coefficient and hygroscopicity lower than those of the synthetic resin.
Claim 3
Dependent Claim
38 words
A device according to claim 1, wherein said first and second head arms extend along the direction of movement of the carriage main body, and said regulating members extend along the entire extending length of the head arms.
Claim 4
Dependent Claim
20 words
A device according to claim 1, wherein said carriage main body is formed integrally with one of the head arms.
Claim 5
Dependent Claim
25 words
A device according to claim 1, which further comprises another magnetic head mounted on the other head arm, so as to oppose the magnetic head.
Claim 6
Dependent Claim
16 words
A device according to claim 4, wherein said regulating members are made of an amber alloy.
Claim 7
Dependent Claim
28 words
A device according to claim 4, wherein each of said regulating membes is formed in a plate-like shape and fixed to the surface of the corresponding head arm.
Claim 8
Dependent Claim
34 words
A device according to claim 4, wherein each of said regulating members is buried in the corresponding head arm. INSERT B1, Page 6 which has a relatively high thermal expansion coefficient and high hygroscopicity
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |