US4969057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floppy disc drive apparatus for preventing absorption between a head and a floppy disc
Assignee: Toshiba Corp
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Filing: 1988-01-13
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Granted: 1990-11-06
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Expires: 2008-01-13
Abstract
Abstract The present invention relates to a system (FDD) for driving such a magnetic disc as a floppy disc, in which, in a stand-by mode where recording or reproducing operation is not carried out, a magnetic head is moved to a track position in the vicinity of the innermost peripheral part of the disc or the disc is intermittently rotably driven so that an adsorbent phenomenon can be prevented from taking place between the magnetic head and the disc and even in the case of occurrence of such a adsorbent phenomenon, the magnetic head or disc can be easily released from such adsorbent binding, thus preventing any destruction of information recorded on the disc.
Inventors
- 👤 Shunji Inomata
- 👤 Tamotsu Wakabayashi
- 👤 Hideyasu Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:07
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B19/02; G11B19/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
172 words
A floppy disc drive apparatus having an absorption preventing function for preventing absorption between a head and a surface of a floppy disc, wherein the head is in contact with the surface of the floppy disc when the floppy disc is driven, the floppy disc including data tracks and a non-data region located at an inner diameter portion thereof, the apparatus comprising: first driving means for driving the head in a radial direction of the floppy disc; second driving means for rotating the floppy disc; first controlling means for controlling said first driving means so as to move the head across the data tracks to the non-data region of the floppy disc when data accessing to the floppy disc is completed; and second controlling means for controlling said second driving means to rotate the floppy disc for a first predetermined time period at an interval of a second predetermined time period when data accessing to the floppy disc is not executed to prevent absorption between the head and the floppy disc surface.
Claim 2
Dependent Claim
172 words
A floppy disc drive apparatus having an absorption preventing function for preventing absorption between a head and a surface of a floppy disc, wherein the head is in contact with the surface of the floppy disc when the floppy disc is driven, the floppy disc including data tracks and a non-data region located at an inner diameter portion thereof, the apparatus comprising: first driving means for driving the head in a radial direction of the floppy disc; second driving means for rotating the floppy disc; first controlling means for controlling said first driving means so as to move the head across the data tracks to the non-data region of the floppy disc when data accessing to the floppy disc is completed; and second controlling means for controlling said second driving means to rotate the floppy disc for a first predetermined time period at an interval of a second predetermined time period when data accessing to the floppy disc is not executed to prevent absorption between the head and the floppy disc surface.
Claim 3
Dependent Claim
17 words
The floppy disc drive apparatus of claim 1 wherein said first driving means comprises a step motor.
Claim 4
Dependent Claim
96 words
The floppy disc drive apparatus of claim 1 wherein said first controlling means includes means for detecting a track position of the head on the floppy disc, calculating means for calculating a number of the floppy disc data tracks crossed by the head up to a predetermined track in the non-data region according to said detected track position and a control unit for supplying a signal, representing said calculated number of floppy disc tracks crossed, to said first driving means so as to control movement of the head in the radial direction of the floppy disc.
Claim 5
Dependent Claim
48 words
The floppy disc drive apparatus of claim 1 wherein said second controlling means includes a timer circuit for outputting a signal at intervals of a predetermined time period and a control unit for driving said second driving means intermittently in response to an output of said timer circuit.
Claim 6
Dependent Claim
159 words
A floppy disc drive apparatus having an absorption preventing function for preventing absorption between a head and a surface of a floppy disc wherein the head is in contact with the surface of the floppy disc when the floppy disc is driven, the floppy disc including data storage tracks and a non-data region located at an inner diameter portion thereof, said apparatus comprising: first driving means for driving the head in a radial direction of the floppy disc; second driving means for rotating the floppy disc; and controlling means for controlling said first driving means to move the head to the non-data region when data accessing to the floppy disc is completed and for controlling said second driving means to rotate intermittently at an interval of a predetermined time period when the head is in the non-data region and data accessing to the floppy disc is not executed, to prevent absorption between the head and the floppy disc surface.
Claim 7
Dependent Claim
159 words
A floppy disc drive apparatus having an absorption preventing function for preventing absorption between a head and a surface of a floppy disc wherein the head is in contact with the surface of the floppy disc when the floppy disc is driven, the floppy disc including data storage tracks and a non-data region located at an inner diameter portion thereof, said apparatus comprising: first driving means for driving the head in a radial direction of the floppy disc; second driving means for rotating the floppy disc; and controlling means for controlling said first driving means to move the head to the non-data region when data accessing to the floppy disc is completed and for controlling said second driving means to rotate intermittently at an interval of a predetermined time period when the head is in the non-data region and data accessing to the floppy disc is not executed, to prevent absorption between the head and the floppy disc surface.
Claim 8
Dependent Claim
17 words
The floppy disc drive apparatus of claim 5 wherein said first driving means comprises a step motor.
Claim 9
Dependent Claim
122 words
The floppy disc drive apparatus of claim 5 wherein said controlling means further comprises means for detecting a track position of the head on the floppy disc, calculating means for calculating the number of tracks crossed by the head up to a predetermined track in the non-data region according to the detected track position, a control unit for supplying a signal, representing said calculated number of data tracks crossed, to said first driving means to control movement of the head in the radial direction of the floppy disc, a timer circuit for outputting a signal at intervals of a predetermined time period and a control unit for driving the second driving means intermittently in response to said signal of said timer circuit.
Claim 10
Independent Claim
182 words
A method of controlling a floppy disc drive apparatus having an absorption preventing function for preventing absorption between a head and a surface of a floppy disc wherein the head contacts a surface of the floppy disc, the floppy disc drive apparatus comprising a first driving means for driving the head in a direction radial to the floppy disc and a second driving means for rotating the floppy disc, the floppy disc including data tracks and a non-data region at an inner diameter portion thereof, the method comprising the steps of: actuating the first driving means to move the head across the data tracks to the non-data region when data accessing to the floppy disc is completed; stopping the first driving means to retain the head in the non-data region of the floppy disc; actuating the second driving means for a first predetermined time period at an interval of a second predetermined period while the head is in the non-data region when data accessing to the floppy disc is not executed to prevent absorption between the head and the floppy disc surface.
Claim 11
Independent Claim
182 words
A method of controlling a floppy disc drive apparatus having an absorption preventing function for preventing absorption between a head and a surface of a floppy disc wherein the head contacts a surface of the floppy disc, the floppy disc drive apparatus comprising a first driving means for driving the head in a direction radial to the floppy disc and a second driving means for rotating the floppy disc, the floppy disc including data tracks and a non-data region at an inner diameter portion thereof, the method comprising the steps of: actuating the first driving means to move the head across the data tracks to the non-data region when data accessing to the floppy disc is completed; stopping the first driving means to retain the head in the non-data region of the floppy disc; actuating the second driving means for a first predetermined time period at an interval of a second predetermined period while the head is in the non-data region when data accessing to the floppy disc is not executed to prevent absorption between the head and the floppy disc surface.
Claim 12
Dependent Claim
81 words
The method of claim 8 further comprising the steps of detecting a track position of the head on the floppy disc, calculating a number of the floppy disc data tracks crossed by the head up to a predetermined track in the non-data region according to said detected track position and supplying a signal representing the calculated number of floppy disc tracks crossed, to said first driving means to control movement of the head in the radial direction of the floppy disc.
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) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |