Patent US5068761A successfully refreshed from Google Patents.
US5068761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk cartridge with notch for locking a shutter
Assignee: Nakamichi Corp
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Filing: 1990-04-10
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Granted: 1991-11-26
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Expires: 2010-04-10
Abstract
Abstract A disk cartridge includes a hard jacket having head insert hole. A shutter on the hard jacket is moveable between the open position and the closed position relative to the head insert hole. The front edge of the hard jacket includes a notch defined by at least a bottom wall and a side wall. To make easy the insertion of the disk cartridge into a recording and reproducing apparatus, thereby improving a feeling of operation, the side wall is connected to the front edge by a corner wall whose distance from one side edge of the shutter standing at the open position progressively increases as it approaches the front edge.
Inventors
- 👤 Yoshihisa Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:17
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/04; G11B17/041; G11B17/043; G11B17/0434; G11B23/00; G11B23/02; G11B23/03; G11B23/0301; G11B23/0308
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
221 words
A disk cartridge comprising: a hard jacket for rotatably accommodating a disc-shaped recording medium; a head insert hole in said jacket; a shutter attached to said hard jacket movable generally linearly between an open position where the head insert hole is open and a closed position where it is closed; a spring for urging the said shutter toward said closed position; a notch at a front edge of said hard jacket; said notch including at least a bottom wall and a side wall contiguous to said bottom wall and extending orthogonally to said front edge, which faces one side edge of said shutter when said shutter is in said open position; said side wall of the notch is connected to said front edge of said hard jacket by a corner wall whose distance from the one side edge of the shutter standing at the open position progressively increases as it approaches said front edge of the hard jacket; said notch being effective for accepting an engaging means for locking said shutter at said open position; said engaging means, in its engaging position, contacting said side wall at a distance r above said bottom wall; and said corner wall beginning at least said distance r above said bottom wall, whereby said engaging means contacts said side wall, when in its engaging position.
Claim 2
Dependent Claim
221 words
A disk cartridge comprising: a hard jacket for rotatably accommodating a disc-shaped recording medium; a head insert hole in said jacket; a shutter attached to said hard jacket movable generally linearly between an open position where the head insert hole is open and a closed position where it is closed; a spring for urging the said shutter toward said closed position; a notch at a front edge of said hard jacket; said notch including at least a bottom wall and a side wall contiguous to said bottom wall and extending orthogonally to said front edge, which faces one side edge of said shutter when said shutter is in said open position; said side wall of the notch is connected to said front edge of said hard jacket by a corner wall whose distance from the one side edge of the shutter standing at the open position progressively increases as it approaches said front edge of the hard jacket; said notch being effective for accepting an engaging means for locking said shutter at said open position; said engaging means, in its engaging position, contacting said side wall at a distance r above said bottom wall; and said corner wall beginning at least said distance r above said bottom wall, whereby said engaging means contacts said side wall, when in its engaging position.
Claim 3
Dependent Claim
237 words
A disk cartridge comprising: a hard jacket for rotatably accommodating a disc-shaped recording medium; said hard jacket including a head insert hole; a shutter attached to said hard jacket movable generally linearly between an open position where said head insert hole is open and a closed position where it is closed; a spring for urging said shutter toward said closed position; a notch at a front edge of said hard jacket; said notch including at least a bottom wall and a side wall contiguous to said bottom wall and orthogonally to said front wall; said side wall faces one side edge of said shutter standing at the open position; said side wall of the notch is connected to said front edge of said hard jacket by a corner wall whose distance from the one side edge of the shutter standing at the open position progressively increases as it approaches said front edged of the hard jacket; said notch being effective to receive an engaging pin of a shutter opening means; said engaging pin contacting said side wall at a distance r above said bottom wall, when said engaging pin is in its engaging position; said corner wall joining said side wall at a distance d' above said bottom wall; and said distance d' being substantially greater than said distance r, whereby said engaging pin contacts said side wall, when said engaging pin is in its engaging position.
Claim 4
Dependent Claim
237 words
A disk cartridge comprising: a hard jacket for rotatably accommodating a disc-shaped recording medium; said hard jacket including a head insert hole; a shutter attached to said hard jacket movable generally linearly between an open position where said head insert hole is open and a closed position where it is closed; a spring for urging said shutter toward said closed position; a notch at a front edge of said hard jacket; said notch including at least a bottom wall and a side wall contiguous to said bottom wall and orthogonally to said front wall; said side wall faces one side edge of said shutter standing at the open position; said side wall of the notch is connected to said front edge of said hard jacket by a corner wall whose distance from the one side edge of the shutter standing at the open position progressively increases as it approaches said front edged of the hard jacket; said notch being effective to receive an engaging pin of a shutter opening means; said engaging pin contacting said side wall at a distance r above said bottom wall, when said engaging pin is in its engaging position; said corner wall joining said side wall at a distance d' above said bottom wall; and said distance d' being substantially greater than said distance r, whereby said engaging pin contacts said side wall, when said engaging pin is in its engaging position.
Claim 5
Dependent Claim
17 words
A disk cartridge according to claim 2, wherein said corner wall is curved with a radius R.
Claim 6
Dependent Claim
21 words
A disk cartridge according to claim 2 wherein said corner wall is straight and inclined with respect to the side wall.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-25 | 1995-05-27 | 1995-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-25 | 1999-05-27 | 1999-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-25 | 2003-05-27 | 2003-11-26 | $7700.00 | Window Closed / Lapsed |