US3856235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape control arm
Assignee: Individual
•
Filing: 1973-03-12
•
Granted: 1974-12-24
•
Expires: 1993-03-12
Abstract
Abstract An elongated cantilevered arm has a first portion to be supported in a magnetic tape cassette or cartridge case, and a second portion spaced from the first portion to engage and bias the tape. The arm second portion defines a tape receiving channel, and it has ribbing projecting in the channel to slidably engage and seat a non-track portion of the tape.
Inventors
- 👤 R Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:50
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08757
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
For use in a magnetic tape cassette assembly having cover and receptacle elements defining a case with apertures along an edge thereof for exposing tape to contact with playback unit head means, and tape reel means mounted to rotate within the case, the improvement comprising a. an elongated cantilevered arm having a first portion to be supported in the case and having a second portion spaced from said first portion to engage and bias the tape, b. said second portion defining a tape receiving channel, and said second portion having elongated ribbing projecting in the channel to slidably engage and seat a non-track portion of the tape, said second portion also having transversely spaced and opposed surfaces which taper toward the interior of the channel to seat opposite edges of the tape at a tape position of proximal medial engagement with said ribbing, crosswise of the type width, the overall width of said ribbing being substantially less than the spacing between said surfaces, said ribbing confined to the medial portion of said space between said surfaces, said ribbing and surfaces being integral.
Claim 2
Dependent Claim
182 words
For use in a magnetic tape cassette assembly having cover and receptacle elements defining a case with apertures along an edge thereof for exposing tape to contact with playback unit head means, and tape reel means mounted to rotate within the case, the improvement comprising a. an elongated cantilevered arm having a first portion to be supported in the case and having a second portion spaced from said first portion to engage and bias the tape, b. said second portion defining a tape receiving channel, and said second portion having elongated ribbing projecting in the channel to slidably engage and seat a non-track portion of the tape, said second portion also having transversely spaced and opposed surfaces which taper toward the interior of the channel to seat opposite edges of the tape at a tape position of proximal medial engagement with said ribbing, crosswise of the type width, the overall width of said ribbing being substantially less than the spacing between said surfaces, said ribbing confined to the medial portion of said space between said surfaces, said ribbing and surfaces being integral.
Claim 3
Dependent Claim
44 words
The improvement of claim 1 wherein the arm extent between said arm first and second portions is resiliently flexible in directions toward and away from the tape, and which is bowed to remain out of engagement with the tape roll on the reel means.
Claim 4
Dependent Claim
48 words
The improvement of claim 1 wherein the arm has a third portion like said second portion but spaced from the first portion directionally generally oppositely from the second portion, said second and third portions located to respectively engage the tape on two reels defined by said reel means.
Claim 5
Dependent Claim
19 words
The improvement of claim 1 wherein said first portion defines a fulchrum to be pivotally supported in the case.
Claim 6
Dependent Claim
21 words
The improvement of claim 1 wherein said second portion is integral with the arm, the arm consisting of molded plastic material.
Claim 7
Dependent Claim
30 words
The improvement of claim 1 wherein said second portion is rotatable relative to the first portion in response to travel of the tape in frictional engagement with said second portion.
Claim 8
Dependent Claim
15 words
The improvement of claim 4 including said tape cassette assembly pivotally supporting the arm fulchrum.
Claim 9
Dependent Claim
13 words
The improvement of claim 1 including said tape cassette assembly supporting the arm.
Claim 10
Dependent Claim
26 words
The improvement of claim 1 wherein said ribbing includes multiple laterally spaced ribs which are elongated in the direction of tape relative travel through the channel.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |