Patent US5364720A successfully refreshed from Google Patents.
Patent US4624399A successfully refreshed from Google Patents.
US4624399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gripping drive for magnetic tape
Assignee: Safran Data Systems SAS
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Filing: 1985-03-19
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Granted: 1986-11-25
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Expires: 2005-03-19
Abstract
Abstract Tape drive apparatus having a drive roller 1 and pinch roller 2 including a idler roller 3 around which tape 4 passes. The pinch roller 2 which is rotatable about two normal axes (A2 and A4), is resiliently urged against the drive roller 1 and the idler roller 3, the two rollers being spaced apart from each other. This apparatus is particularly useful for magnetic tape cassettes, the pinch roller 2 being formed as either part of the cassette or as part of a tape recorder/player for using a cassette.
Inventors
- 👤 Jean-Pierre Merle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:43
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08778; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/29
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
138 words
Apparatus for driving a magnetic tape, comprising: a drive roller rotatable about a fixed first axis for providing drive for the tape; a pinch roller rotatable about a second axis; a idler roller around which the tape passes, said idler roller being spaced apart from said drive roller and rotatable about a fixed third axis substantially parallel to the first axis; and pinch roller mounting means for urging said pinch roller along a direction such that said pinch roller simultaneously impinges against both the tape passing around said idler roller and said drive roller such that said second axis is substantially parallel with said first and third axes, said pinch roller mounting means being rotatable about a fourth axis substantially perpendicular to the second axis and substantially parallel to the direction along which the pinch roller is urged.
Claim 2
Dependent Claim
138 words
Apparatus for driving a magnetic tape, comprising: a drive roller rotatable about a fixed first axis for providing drive for the tape; a pinch roller rotatable about a second axis; a idler roller around which the tape passes, said idler roller being spaced apart from said drive roller and rotatable about a fixed third axis substantially parallel to the first axis; and pinch roller mounting means for urging said pinch roller along a direction such that said pinch roller simultaneously impinges against both the tape passing around said idler roller and said drive roller such that said second axis is substantially parallel with said first and third axes, said pinch roller mounting means being rotatable about a fourth axis substantially perpendicular to the second axis and substantially parallel to the direction along which the pinch roller is urged.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 wherein the fourth axis is substantially normal to a plane containing the first and third axes.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 wherein the tape is wrapped around the idler roller through an angle of at least 90°.
Claim 5
Dependent Claim
24 words
The apparatus of claim 1 wherein the pinch roller is movable along a direction normal to a plane containing the first and third axes.
Claim 6
Dependent Claim
43 words
The apparatus of claim 1 wherein the drive, idler and pinch rollers are arranged such that a first plane containing the first and second axes intersects with a second plane containing said second and third axes at an angle of at least 60°.
Claim 7
Dependent Claim
24 words
The apparatus of claim 1 wherein at least the surface of the idler roller is formed from a ground metal having a roughened surface.
Claim 8
Dependent Claim
34 words
The apparatus of claim 1 further including a tape cassette containing said tape, said tape cassette cooperating with said tape drive apparatus and wherein the pinch roller is formed as part of the cassette.
Claim 9
Dependent Claim
28 words
The apparatus of claim 1 further including a tape recorder/player cooperating with said tape drive apparatus and wherein the pinch roller is formed as part of said recorder/player.
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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) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |