US4276575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape guide for high-speed tape transport apparatus
Assignee: Emtec Magnetics GmbH
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Filing: 1979-10-18
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Granted: 1981-06-30
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Expires: 1999-10-18
Abstract
Abstract A tape guide, especially a tape guide of large surface area for high-speed tape transport apparatus, having at least on the tape guide surface a mixture of plastics material and lubricant exhibiting a specific surface roughness and a specific coefficient of friction, the said mixture consisting of 10 to 70 percent by weight of lubricant, e.g. natural graphite, molybdenum disulfide and/or tungsten disulfide, and 90 to 30 percent by weight of plastics material, e.g. polyoxymethylene, polyethylene and polypropylene. The plastic/lubricant mixture may also be in the form of a strip-like element fastened to a backing member. The tape guide can be used for any type of tape transport apparatus, especially in video recording equipment employing magnetic tape on which the signals are recorded in longitudinal tracks.
Inventors
- 👤 Klaus Schoettle
- 👤 Werner Hoffmann
- 👤 Eduard Kaemmer
- 👤 Klaus Boehlke
- 👤 Helmut Lewin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:54
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/67
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
47 words
A tape guide for tape transport apparatus, wherein at least the material forming the guide surface for the tape consists of plastics material and lubricant, the said material having a surface roughness of 0.1 to 1 μm and a coefficient of friction of between 0.20 and 0.40.
Claim 2
Dependent Claim
47 words
A tape guide for tape transport apparatus, wherein at least the material forming the guide surface for the tape consists of plastics material and lubricant, the said material having a surface roughness of 0.1 to 1 μm and a coefficient of friction of between 0.20 and 0.40.
Claim 3
Dependent Claim
19 words
A tape guide according to claim 1, wherein the material contains 10 to 70 percent by weight of lubricant.
Claim 4
Dependent Claim
14 words
A tape guide according to claim 1, wherein the lubricant used is natural graphite.
Claim 5
Dependent Claim
19 words
A tape guide according to claim 1, wherein the material contains 80 to 50 percent by weight of polyethylene.
Claim 6
Dependent Claim
27 words
A tape guide according to claim 1, wherein a strip-like element consisting of plastics materials and lubricant and fastened to a backing member forms the guide surface.
Claim 7
Dependent Claim
19 words
A tape guide according to claim 1, wherein the material contains 80 to 50 percent by weight of polypropylene.
Claim 8
Dependent Claim
19 words
A tape guide according to claim 1, wherein the material contains 80 to 50 percent by weight of polyoxymethylene.
Claim 9
Dependent Claim
50 words
A tape guide of large surface area for high-speed tape transport apparatus, wherein a strip-like element which consists of plastics material and lubricant and has a surface roughness of 0.1 to 1 μm and a coefficient of friction of between 0.20 and 0.40 forms the guide surface for the tape.
Claim 10
Dependent Claim
50 words
A tape guide of large surface area for high-speed tape transport apparatus, wherein a strip-like element which consists of plastics material and lubricant and has a surface roughness of 0.1 to 1 μm and a coefficient of friction of between 0.20 and 0.40 forms the guide surface for the tape.
Claim 11
Dependent Claim
17 words
A tape guide according to claim 8, wherein the strip-like element is fastened to a backing member.
Claim 12
Dependent Claim
22 words
A tape guide according to claim 9, wherein the strip-like element is fastened in at least one groove in the backing member.
Claim 13
Dependent Claim
19 words
A tape guide according to claim 8, wherein the material contains 10 to 70 percent by weight of lubricant.
Claim 14
Dependent Claim
19 words
A tape guide according to claim 11, wherein the material contains 20 to 50 percent by weight of lubricant.
Claim 15
Dependent Claim
14 words
A tape guide according to claim 12, wherein the lubricant used is natural graphite.
Claim 16
Dependent Claim
19 words
A tape guide according to claim 8, wherein the material contains 80 to 50 percent by weight of polyoxymethylene.
Claim 17
Dependent Claim
59 words
A tape guide for high-speed tape transport apparatus, wherein a strip-like element which consists of 20 to 50 percent by weight of lubricant and 80 to 50 percent by weight of polyoxymethylene and has a surface roughness of 0.1 to 1 μm and a coefficient of friction of between 0.20 and 0.40 forms the guide surface for the tape.
Claim 18
Dependent Claim
59 words
A tape guide for high-speed tape transport apparatus, wherein a strip-like element which consists of 20 to 50 percent by weight of lubricant and 80 to 50 percent by weight of polyoxymethylene and has a surface roughness of 0.1 to 1 μm and a coefficient of friction of between 0.20 and 0.40 forms the guide surface for the tape.
Claim 19
Dependent Claim
14 words
A tape guide according to claim 15, wherein the lubricant used is natural graphite.
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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |