Patent US4897750A successfully refreshed from Google Patents.
US4897750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encodable insert for a recording cassette
Assignee: GlassBridge Enterprises Inc
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Filing: 1988-05-09
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Granted: 1990-01-30
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Expires: 2008-05-09
Abstract
Abstract Digital videocassettes are encoded by punching out breakaway tabs to permit a sensing mechanism on a recorder to identify key characteristics of each cassette. The encoding can be changed when the breakaway tabs are carried by an insert that can be remvably affixed to the cassettes. By employing such an insert, a number of problems are avoided such as possible contamination of the cassette and/or recorder by loose tabs. The tabs of the insert do not need to be breakaway when the inserts are initially formed to provide desired codes.
Inventors
- 👤 Robert L. Hanson
- 👤 John E. Dunstan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:58
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08714
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
38 words
An encodable recording cassette comprising: an insert formed with a plurality of coding holes, the insert including means for either blocking or unblocking each of the coding holes, and means for detachably fixing the insert to the cassette.
Claim 2
Dependent Claim
38 words
An encodable recording cassette comprising: an insert formed with a plurality of coding holes, the insert including means for either blocking or unblocking each of the coding holes, and means for detachably fixing the insert to the cassette.
Claim 3
Dependent Claim
18 words
A recording cassette as defined in claim 1 wherein each of said blocking/unblocking means comprises a breakaway tab.
Claim 4
Dependent Claim
29 words
A recording cassette as defined in claim 2 wherein said insert is bifurcated to provide two legs, each a mirror image of the other and interconnected by a bridge.
Claim 5
Dependent Claim
41 words
A recording cassette as defined in claim 3 wherein the cassette has a pair of ribbed flanges, and at least two lugs project from each leg of the insert to grip the ribbed flanges to secure the insert to the cassette.
Claim 6
Dependent Claim
33 words
A recording cassette as defined in claim 4 wherein the face of each lug which contacts a flange is formed with a groove that mates with a rib on one of the flanges.
Claim 7
Dependent Claim
44 words
A recording cassette as defined in claim 5 and having a pair of walls that enclose a pair of reels of magnetic recording tape housed side by side in the cassette, and each of said flanges projects from one of the pair of walls.
Claim 8
Dependent Claim
28 words
A recording cassette as defined in claim 6 wherein said pair of walls intersect at a fork, and the insert is generally triangular to fit into that fork.
Claim 9
Dependent Claim
35 words
A recording cassette as defined in claim 6 wherein at least one membrane extends between the bridge and each of the legs, each membrane serving as a breakaway tab to open coding holes as desired.
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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) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |