Patent US3889900A successfully refreshed from Google Patents.
US3889900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cartridge tape guide
Assignee: Individual
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Filing: 1973-08-01
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Granted: 1975-06-17
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Expires: 1993-08-01
Abstract
Abstract A nonrotatable tape guide for a recording tape cartridge is formed of a fixed post, which protrudes from an inner surface of one of the cartridge sidewalls, and a low friction sleeve disposed on the post. In a first embodiment the sleeve has a concave sidewall that defines two substantially equal openings. A second embodiment also includes a concave sidewall but differs from the first embodiment in that one of the two openings defined by the sidewall is approximately one-half the diameter of the other opening to present a concial like shape.
Inventors
- 👤 Norman E Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:02
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08757
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
In a tape cartridge the combination comprising: a case with spaced apart sidewalls; at least one fixed mounting post protruding from an inner surface of one of said sidewalls and disposed near one peripheral edge of said case; a sleeve formed from a low friction material and affixed on said post, said sleeve having a concave sidewall that exerts centering forces on tape that is guided by said sleeve; and one of said post and said sleeve is out of round and the other is cylindrically shaped, and said sleeve is of such size that it is deformed from its normal shape to fit on said post with a friction fit and have a spring retention effect to securely hold the sleeve on the post.
Claim 2
Dependent Claim
125 words
In a tape cartridge the combination comprising: a case with spaced apart sidewalls; at least one fixed mounting post protruding from an inner surface of one of said sidewalls and disposed near one peripheral edge of said case; a sleeve formed from a low friction material and affixed on said post, said sleeve having a concave sidewall that exerts centering forces on tape that is guided by said sleeve; and one of said post and said sleeve is out of round and the other is cylindrically shaped, and said sleeve is of such size that it is deformed from its normal shape to fit on said post with a friction fit and have a spring retention effect to securely hold the sleeve on the post.
Claim 3
Dependent Claim
30 words
A tape cartridge as recited in claim 1 wherein said sleeve has a flange at one end that serves as a positive reference for positioning said sleeve in said case.
Claim 4
Dependent Claim
29 words
A tape cartridge as recited in claim 1 wherein said sleeve is symmetrical about a plane through the midpoint of and perpendicular to the longitudinal axis of the sleeve.
Claim 5
Dependent Claim
28 words
A tape cartridge as recited in claim 1 wherein said sleeve defines two openings that are substantially different in size and the sleeve has a conical like configuration.
Claim 6
Dependent Claim
103 words
In a tape cartridge the combination comprising: a case with spaced apart sidewalls; at least one fixed mounting post protruding from an inner surface of one of said sidewalls and disposed near one peripheral edge of said case; and an elliptically shaped sleeve formed from a low friction material and affixed on said post, said sleeve having a concave sidewall that is substantially symmetrical about a plane through the midpoint of and perpendicualr to the longitudinal axis of the sleeve and a flange that forms a bell on one end of the sleeve for facilitating the mounting of said sleeve on said post.
Claim 7
Dependent Claim
103 words
In a tape cartridge the combination comprising: a case with spaced apart sidewalls; at least one fixed mounting post protruding from an inner surface of one of said sidewalls and disposed near one peripheral edge of said case; and an elliptically shaped sleeve formed from a low friction material and affixed on said post, said sleeve having a concave sidewall that is substantially symmetrical about a plane through the midpoint of and perpendicualr to the longitudinal axis of the sleeve and a flange that forms a bell on one end of the sleeve for facilitating the mounting of said sleeve on said post.
Claim 8
Dependent Claim
112 words
In a tape cartridge the combination comprising: a case with spaced apart sidewalls; at least one fixed mounting post protruding from an inner surface of one of said sidewalls and disposed near one peripheral edge of said case; and a sleeve formed from a low friction material and affixed on said post, said sleeve having a concave sidewall that exerts centering forces on tape that is guided thereby and said sleeve is resilient, is elliptically shaped and is of such size that it is deformed from its normal shape to fit on said post with a friction fit and have a spring retention effect to securely hold the sleeve on the post.
Claim 9
Dependent Claim
112 words
In a tape cartridge the combination comprising: a case with spaced apart sidewalls; at least one fixed mounting post protruding from an inner surface of one of said sidewalls and disposed near one peripheral edge of said case; and a sleeve formed from a low friction material and affixed on said post, said sleeve having a concave sidewall that exerts centering forces on tape that is guided thereby and said sleeve is resilient, is elliptically shaped and is of such size that it is deformed from its normal shape to fit on said post with a friction fit and have a spring retention effect to securely hold the sleeve on the post.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |