Patent US3949422A successfully refreshed from Google Patents.
US3949422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape recorder with pivotal erase head bearing
Assignee: Sony Corp
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Filing: 1974-05-16
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Granted: 1976-04-06
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Expires: 1994-05-16
Abstract
Abstract A tape recorder is provided with an erasing head, a bearing member for rotatably journaling a pinch roller and a pinch lever for supporting the bearing member, all of them being integrally combined. The erasing head has its slidable contact surface projected into the tape path side with one of its side surfaces being faced to the peripheral surface of the pinch roller, and upper and lower flanges thereof projected over the slidable contact surface are used to guide a tape therebetween.
Inventors
- 👤 Shoji Sato
- 👤 Kenji Yoshida
- 👤 Kiyoshi Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:57
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/1883; G11B15/60; G11B15/62; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08757; G11B5/00; G11B5/127; G11B5/187; G11B5/325; G11B5/48; G11B5/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
267 words
Magnetic erasing head apparatus for use in a magnetic tape cassette recorder of the type which is operable with a magnetic tape cassette formed of a housing for magnetic tape and having a plurality of windows through which said tape is accessible, comprising: a bearing member for supporting a pinch roller, said pinch roller being rotatably journaled in said bearing member; a magnetic erasing head having at least a portion thereof mounted in and supported by said bearing member and having another portion thereof extending outwardly from said bearing member, said magnetic erasing head having a tape contact portion positioned at said another portion for slidably contacting said magnetic tape, said magnetic erasing head further having tape guide flanges positioned adjacent said tape contact portion for guiding said magnetic tape into slidable contact with said tape contact portion, said magnetic erasing head being mounted in said bearing member in juxtaposition with said pinch roller; a pinch lever pivotally mounted in said recorder for pivotally supporting said bearing member and said erasing head mounted in said bearing member such that when said pinch lever is pivoted into an operative position with respect to said magnetic tape, said pinch roller and said erasing head are urged through one of said cassette housing windows into contact with said magnetic tape, said pinch roller advancing said tape past said tape guide flanges and in slidable contact with said erasing head; and means for pivotally mounting said bearing member on said pinch lever to thereby define a first pivot axis about which said bearing member pivots with respect to said pinch lever.
Claim 2
Dependent Claim
267 words
Magnetic erasing head apparatus for use in a magnetic tape cassette recorder of the type which is operable with a magnetic tape cassette formed of a housing for magnetic tape and having a plurality of windows through which said tape is accessible, comprising: a bearing member for supporting a pinch roller, said pinch roller being rotatably journaled in said bearing member; a magnetic erasing head having at least a portion thereof mounted in and supported by said bearing member and having another portion thereof extending outwardly from said bearing member, said magnetic erasing head having a tape contact portion positioned at said another portion for slidably contacting said magnetic tape, said magnetic erasing head further having tape guide flanges positioned adjacent said tape contact portion for guiding said magnetic tape into slidable contact with said tape contact portion, said magnetic erasing head being mounted in said bearing member in juxtaposition with said pinch roller; a pinch lever pivotally mounted in said recorder for pivotally supporting said bearing member and said erasing head mounted in said bearing member such that when said pinch lever is pivoted into an operative position with respect to said magnetic tape, said pinch roller and said erasing head are urged through one of said cassette housing windows into contact with said magnetic tape, said pinch roller advancing said tape past said tape guide flanges and in slidable contact with said erasing head; and means for pivotally mounting said bearing member on said pinch lever to thereby define a first pivot axis about which said bearing member pivots with respect to said pinch lever.
Claim 3
Dependent Claim
32 words
Magnetic erasing head apparatus in accordance with claim 1 wherein said magnetic erasing head includes an arcuate surface opposite said pinch roller so as to circumscribe a portion of said pinch roller.
Claim 4
Dependent Claim
41 words
Magnetic erasing head apparatus in accordance with claim 2 wherein said tape guide flanges are substantially flat members disposed in opposite parallel planes encompassing said tape contact portion therebetween and having curved edges to circumscribe a portion of said pinch roller.
Claim 5
Dependent Claim
51 words
Magnetic erasing head apparatus in accordance with claim 4 and further comprising biasing means for predeterminedly biasing said bearing member on said pinch lever to thereby urge said bearing member in a pivotal direction with respect to said pinch lever so as to urge said erasing head toward said magnetic tape.
Claim 6
Dependent Claim
52 words
Magnetic erasing head apparatus in accordance with claim 1 wherein said means for pivotally mounting said bearing member on said pinch lever comprises a pinch roller shaft about which said pinch roller rotates; and further comprising a pinch lever shaft which defines a second pivot axis about which said pinch lever pivots.
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |