US4717976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus using disc-shaped record bearing medium
Assignee: Canon Inc
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Filing: 1984-08-07
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Granted: 1988-01-05
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Expires: 2004-08-07
Abstract
Abstract An apparatus using a disc-shaped record bearing medium having an engaging portion and at least one rotation indication portion, including a rotation mechanism for rotating the medium, a pressing device for mounting the medium on the rotation mechanism at the engaging portion, and a detection mechanism provided on a portion of the pressing device for detecting the rotation indication portion of the medium.
Inventors
- 👤 Akimasa Nishimura
- 👤 Nobuo Tezuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:06
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/0014; G11B23/0021; G11B23/0028; G11B23/0035; G11B23/0042; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/032; G11B19/00; G11B19/02; G11B19/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
99 words
An apparatus using a disc-shaped record bearing medium having an engaging portion and at least one rotation indication portion, comprising: (A) rotation means for retaining and rotating the medium; (B) pressing means for pressing the medium to load the medium on said rotation means at the engaging portion of the medium, said pressing means ceasing the pressing of the medium while said medium is rotating; and (C) detection means for detecting the rotation indication portion of the medium while said medium rotates, at least a portion of said detection means being provided on a portion of said pressing means.
Claim 2
Independent Claim
99 words
An apparatus using a disc-shaped record bearing medium having an engaging portion and at least one rotation indication portion, comprising: (A) rotation means for retaining and rotating the medium; (B) pressing means for pressing the medium to load the medium on said rotation means at the engaging portion of the medium, said pressing means ceasing the pressing of the medium while said medium is rotating; and (C) detection means for detecting the rotation indication portion of the medium while said medium rotates, at least a portion of said detection means being provided on a portion of said pressing means.
Claim 3
Dependent Claim
28 words
The apparatus according to claim 1, wherein said pressing means is arranged for pressing the engaging portion of the medium for loading the medium on said rotation means.
Claim 4
Dependent Claim
64 words
the apparatus according to claim 2, further comprising: control means for causing said pressing means to release said pressing of the engaging portion of the medium, said control means being arranged to position said detecting means at a predetermined position near the rotation indication portion of the medium when the pressing of the engaging portion of the medium by the pressing means is released.
Claim 5
Dependent Claim
73 words
The apparatus according to claim 3, further comprising: holder means for holding the medium, said holder means being movable between a first position for receiving the medium and a second position for positioning the received medium at a predetermined position relative to said rotating means; and latching means for latching said holder means at said second position, said release means being arranged to control said pressing means in response to said latching means.
Claim 6
Dependent Claim
75 words
The apparatus according to claim 2, further comprising: control means for causing said pressing means to press the engaging portion of the medium relative to said rotation means and thereafter release said pressing, said control means being arranged to position said detection means at a predetermined position relative to the locus of the rotation indication portion of the medium when the pressing of the engaging portion of the medium by the pressing means is released.
Claim 7
Dependent Claim
73 words
The apparatus according to claim 5, further comprising: holder means for holding the medium, said holder means being movable between a first position for receiving the medium and a second position for positioning the received medium at a predetermined position relative to said rotating means; and latching means for latching said holder means at said second position, said control means being arranged to control said pressing means is response to said latching means.
Claim 8
Dependent Claim
149 words
A recording and/or reproducing apparatus arranged to use a disc-shaped record bearing medium having an engaging portion and at least one rotation indication portion, said apparatus comprising: (A) recording and/or reproducing head means for recording signals on and/or reproducing recorded signals from said record bearing medium; (B) rotating means for rotating the medium relative to said head means, said rotating means being engageable with said engaging portion of the medium and having a receiving surface for receiving thereon the engaging portion of the medium; (C) pressing means for pressing said engaging portion of the medium against said receiving surface of the rotating means, said pressing means ceasing the pressing of the medium while said medium is rotating; and (D) detection means for detecting the rotation indication portion of the medium while said medium rotates, said detection means being at least partially provided on a portion of said pressing means.
Claim 9
Dependent Claim
149 words
A recording and/or reproducing apparatus arranged to use a disc-shaped record bearing medium having an engaging portion and at least one rotation indication portion, said apparatus comprising: (A) recording and/or reproducing head means for recording signals on and/or reproducing recorded signals from said record bearing medium; (B) rotating means for rotating the medium relative to said head means, said rotating means being engageable with said engaging portion of the medium and having a receiving surface for receiving thereon the engaging portion of the medium; (C) pressing means for pressing said engaging portion of the medium against said receiving surface of the rotating means, said pressing means ceasing the pressing of the medium while said medium is rotating; and (D) detection means for detecting the rotation indication portion of the medium while said medium rotates, said detection means being at least partially provided on a portion of said pressing means.
Claim 10
Dependent Claim
61 words
The apparatus according to claim 7, further comprising: control means for causing said pressing means to release said pressing, said control means being arranged to position said detection means at a predetermined position relative to the locus of the rotation indication portion of the medium when the pressing of the engaging portion of the medium by the pressing means is released.
Claim 11
Dependent Claim
73 words
The apparatus according to claim 8, further comprising: holder means for holding the medium, said holder means being movable between a first position for receiving the medium and a second position for positioning the received medium at a predetermined position relative to said rotating means; and latching means for latching said holder means at said second position, said control means being arranged to control said pressing means in response to said latching means.
Claim 12
Dependent Claim
75 words
The apparatus according to claim 7, further comprising: control means for causing said pressing means to press the engaging portion of the medium relative to said rotation means and thereafter release said pressing, said control means being arranged to position said detection means at a predetermined position relative to the locus of the rotation indication portion of the medium when the pressing of the engaging portion of the medium by the pressing means is released.
Claim 13
Dependent Claim
73 words
The apparatus according to claim 10, further comprising: holder means for holding the medium, said holder means being movable between a first position for receiving the medium and a second position for positioning the received medium at a predetermined position relative to said rotating means; and latching means for latching said holder means at said second position, said control means being arranged to control said pressing means in response to said latching means.
Claim 14
Dependent Claim
213 words
Ad apparatus for recording signals on and/or reproducing recorded signals from a flexible magnetic disc housed in a cassette and having a center core attached at a central portion thereof and provided with an engaging hole and at least one rotation phase indication member, said cassette having a window for exposing a portion of said disc, said apparatus comprising: (A) a magnetic head for recording signals on and/or reproducing recorded signals from the disc; (B) a spindle engageable with said engaging hole of the center core of the disc, said spindle having a flange portion for receiving thereon said center core; (C) a cassette holder positionable at a first position for receiving therein said cassette and a second position for placing the received cassette at a predetermined position to cause the disc within the received cassette to gain access to said head through said window of the cassette; (D) a pressure member for pressing said center core of the disc against said flange portion of the spindle, said pressure member ceasing the pressing of said center core of the disc while said medium is rotating; and (E) a detection member for detecting the rotation phase indication member of the disc while said medium rotates, said detection member being supported by said pressure member.
Claim 15
Dependent Claim
213 words
Ad apparatus for recording signals on and/or reproducing recorded signals from a flexible magnetic disc housed in a cassette and having a center core attached at a central portion thereof and provided with an engaging hole and at least one rotation phase indication member, said cassette having a window for exposing a portion of said disc, said apparatus comprising: (A) a magnetic head for recording signals on and/or reproducing recorded signals from the disc; (B) a spindle engageable with said engaging hole of the center core of the disc, said spindle having a flange portion for receiving thereon said center core; (C) a cassette holder positionable at a first position for receiving therein said cassette and a second position for placing the received cassette at a predetermined position to cause the disc within the received cassette to gain access to said head through said window of the cassette; (D) a pressure member for pressing said center core of the disc against said flange portion of the spindle, said pressure member ceasing the pressing of said center core of the disc while said medium is rotating; and (E) a detection member for detecting the rotation phase indication member of the disc while said medium rotates, said detection member being supported by said pressure member.
Claim 16
Dependent Claim
43 words
The apparatus according to claim 12, further comprising: a positioning mechanism for positioning said pressure member at a predetermined released position and for positioning said detection member at a predetermined detecting portion relative to the locus of the indication member of the disc.
Claim 17
Independent Claim
218 words
An apparatus for recording signals on and/or reproducing recorded signals from a flexible magnetic disc housed in a cassette and having a center core attached at a central portion thereof and provided with an engaging hole and at least one magnetizable member, said cassette having a window for exposing a portion of said disc, said apparatus comprising: (A) a magnetic head for recording signals on and/or reproducing recorded signals from the disc; (B) a spindle engageable with said engaging hole of the center core of the disc, said spindle having a flange portion for receiving thereon said center core; (C) a magnet provided on the flange portion of said spindle; (D) a cassette holder for holding said cassette, said cassette holder being movable from a first to a second position for causing said disc within the held cassette to gain access to said head through said window of the cassette; (E) a pressure member for pressing said center core of tbe disc against said flange portion of the spindle, said pressure member ceasing the pressing of the medium while said medium is rotating; and (F) a pick-up member for picking up a magnetic flux of said magnet guided through a predetermined portion of said magnetizable member of the disc, said pick-up member being supported by said pressure member.
Claim 18
Independent Claim
218 words
An apparatus for recording signals on and/or reproducing recorded signals from a flexible magnetic disc housed in a cassette and having a center core attached at a central portion thereof and provided with an engaging hole and at least one magnetizable member, said cassette having a window for exposing a portion of said disc, said apparatus comprising: (A) a magnetic head for recording signals on and/or reproducing recorded signals from the disc; (B) a spindle engageable with said engaging hole of the center core of the disc, said spindle having a flange portion for receiving thereon said center core; (C) a magnet provided on the flange portion of said spindle; (D) a cassette holder for holding said cassette, said cassette holder being movable from a first to a second position for causing said disc within the held cassette to gain access to said head through said window of the cassette; (E) a pressure member for pressing said center core of tbe disc against said flange portion of the spindle, said pressure member ceasing the pressing of the medium while said medium is rotating; and (F) a pick-up member for picking up a magnetic flux of said magnet guided through a predetermined portion of said magnetizable member of the disc, said pick-up member being supported by said pressure member.
Claim 19
Dependent Claim
39 words
The apparatus according to claim 14, further comprising: a positioning mechanism for positioning said pressure member at a predetermined released position and for positioning said detection member at a predetermined detecting portion near the indication member of the 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) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |