US4687157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape cassette, in particular a video cassette, and a pressure spring for this
Assignee: Emtec Magnetics GmbH
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Filing: 1985-12-18
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Granted: 1987-08-18
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Expires: 2005-12-18
Abstract
Abstract A tape cassette has a housing, at least one tape reel, a front wall and a pressure spring for exerting a spring force on the tape reel(s). The pressure spring is held, e.g. jammed or wedged, between the front wall and a connecting pin connecting parts of the housing together by means of anchoring means forming part of the spring itself.
Inventors
- 👤 Klaus Schoettle
- 👤 Artur Buhk
- 👤 Eugen Kamm
- 👤 Heinz Berger
- 👤 Dieter Gaiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:19
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
A tape cassette, in particular a video tape cassette, having a housing including rear-, front- and side-walls and enclosing two coplanar tape reels and a pressure spring for said tape reels, said pressure spring and said two tape reels being arranged symmetrically with respect to the transverse central plane of said housing, said housing having at least two parts connected together by a connecting means including a connecting pin lying in said transverse central plane, and said pressure spring having substantially the shape of a V formed by two arms joined to a central part, wherein on the pressure spring there are provided anchoring means comprising a bent-up edge portion extending from said central part and a cutout on the side of said central part opposite said bent-up edge portion, whereby, upon insertion of said spring into said housing, said spring is clamped between said front wall and said connecting pin, with said bent-up edge portion bearing against said front wall and said cutout bearing against said connecting pin.
Claim 2
Dependent Claim
169 words
A tape cassette, in particular a video tape cassette, having a housing including rear-, front- and side-walls and enclosing two coplanar tape reels and a pressure spring for said tape reels, said pressure spring and said two tape reels being arranged symmetrically with respect to the transverse central plane of said housing, said housing having at least two parts connected together by a connecting means including a connecting pin lying in said transverse central plane, and said pressure spring having substantially the shape of a V formed by two arms joined to a central part, wherein on the pressure spring there are provided anchoring means comprising a bent-up edge portion extending from said central part and a cutout on the side of said central part opposite said bent-up edge portion, whereby, upon insertion of said spring into said housing, said spring is clamped between said front wall and said connecting pin, with said bent-up edge portion bearing against said front wall and said cutout bearing against said connecting pin.
Claim 3
Dependent Claim
28 words
A tape cassette according to claim 1, wherein the bent-up portion is inclined at an angle from 115° to 95° with respect to the plane of said spring.
Claim 4
Dependent Claim
34 words
A tape cassette according to claim 1, in which the bent-up edge portion has a dimension, perpendicular to its fold line, of not more than 50% of the internal height of said front wall.
Claim 5
Dependent Claim
23 words
A tape cassette according to claim 3, wherein said dimension is from 10% to 30% of said internal height of the front wall.
Claim 6
Dependent Claim
95 words
A pressure spring for a tape cassette having a housing with two parts, at least one tape reel, a front wall and at least one connecting pin for connecting the housing parts together, the pressure spring being designed to exert a spring force on said at least one tape reel in the direction of a defined operating position, wherein the spring has at least one bent-up edge portion cooperating with said front wall and, opposite thereto, a cutout cooperating with said connecting pin, for clamping the spring between the front wall and the connecting pin.
Claim 7
Dependent Claim
95 words
A pressure spring for a tape cassette having a housing with two parts, at least one tape reel, a front wall and at least one connecting pin for connecting the housing parts together, the pressure spring being designed to exert a spring force on said at least one tape reel in the direction of a defined operating position, wherein the spring has at least one bent-up edge portion cooperating with said front wall and, opposite thereto, a cutout cooperating with said connecting pin, for clamping the spring between the front wall and the connecting pin.
Claim 8
Dependent Claim
38 words
A pressure spring according to claim 15, having two arms which are symmetrical with respect to the transverse central plane of the spring and a central part on which the bent-up edge portion and the cutout are formed.
Claim 9
Dependent Claim
169 words
A tape cassette, in particular a video tape cassette, having a housing including rear-, front- and side-walls and enclosing two coplanar tape reels and a pressure spring for said tape reels, said pressure spring and said two tape reels being arranged symmetrically with respect to the transverse central plane of said housing, said housing having at least two parts connected together by a connecting pin lying in said transverse central plane, and said pressure spring having substantially the shape of a V formed by two arms jointed to a central part, wherein on the pressure spring there are provided anchoring means comprising a bent-up edge portion extending from said central part and a cutout on the side of said central part opposite said bent-up edge portion. whereby, upon insertion of said spring into said housing, said spring is clamped between one of said front and rear walls and said connecting pin, with said bent-up edge portion bearing against said one wall and said cutout bearing against said connecting pin.
Claim 10
Dependent Claim
169 words
A tape cassette, in particular a video tape cassette, having a housing including rear-, front- and side-walls and enclosing two coplanar tape reels and a pressure spring for said tape reels, said pressure spring and said two tape reels being arranged symmetrically with respect to the transverse central plane of said housing, said housing having at least two parts connected together by a connecting pin lying in said transverse central plane, and said pressure spring having substantially the shape of a V formed by two arms jointed to a central part, wherein on the pressure spring there are provided anchoring means comprising a bent-up edge portion extending from said central part and a cutout on the side of said central part opposite said bent-up edge portion. whereby, upon insertion of said spring into said housing, said spring is clamped between one of said front and rear walls and said connecting pin, with said bent-up edge portion bearing against said one wall and said cutout bearing against said connecting pin.
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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) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |