Patent US3811257A successfully refreshed from Google Patents.
US3811257A
Expired / Lapsed
US
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Method and apparatus for applying armor tape
Assignee: Radio Frequency Systems Inc
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Filing: 1972-08-14
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Granted: 1974-05-21
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Expires: 1992-08-14
Abstract
Abstract Stiff armor strip for a cable core is pretwisted between two pairs of heavy rolls on the armoring machine and bent sharply at the downstream roll. Double bending of the strip is avoided.
Inventors
- 👤 H Burr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:17
CPC Classifications
D; D07; D07B; D07B7/00; D07B7/02; D07B7/14; B; B65; B65H; B65H81/00; B65H81/06; B65H81/08; D07B7/025; H; H01; H01B; H01B13/00; H01B13/22; H01B13/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49194
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
158 words
A method of helically applying at least one armor strip to an elongated core comprising the steps of: A. continuously advancing said core, B. continuously paying said strip from a supply thereof, onto said core, C. continuously providing a relative angular displacement between said supply and the surface of said core, D. at a station between said supply and said core continuously twisting said strip beyond its torsional elastic limit between upstream and downstream gripping means, thereby imparting a permanent twist to said strip, E. at said downstream gripping means, continuously bending said twisted strip toward said core beyond its elastic limit of bending, thereby imparting a permanent helical form of a diameter approximating the diameter of said core to said strip, F. without further working of said strip, wrapping said strip around said core directly from said downstream gripping means, said strip retaining its twisted form at all points between said downstream gripping means and said core.
Claim 2
Independent Claim
158 words
A method of helically applying at least one armor strip to an elongated core comprising the steps of: A. continuously advancing said core, B. continuously paying said strip from a supply thereof, onto said core, C. continuously providing a relative angular displacement between said supply and the surface of said core, D. at a station between said supply and said core continuously twisting said strip beyond its torsional elastic limit between upstream and downstream gripping means, thereby imparting a permanent twist to said strip, E. at said downstream gripping means, continuously bending said twisted strip toward said core beyond its elastic limit of bending, thereby imparting a permanent helical form of a diameter approximating the diameter of said core to said strip, F. without further working of said strip, wrapping said strip around said core directly from said downstream gripping means, said strip retaining its twisted form at all points between said downstream gripping means and said core.
Claim 3
Dependent Claim
52 words
The method of claim 1 wherein said strip is twisted by pulling it between two pairs of rolls and is bent around one of the rolls of the downstream of said pair, said one roll having a radius small enough for said strip to be bent beyond its elastic limit of bending.
Claim 4
Dependent Claim
24 words
The method of claim 1 comprising a plurality in excess of six of said supplies and of said strips being wrapped around said core.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein said supplies are rotated around the axis of said core.
Claim 6
Dependent Claim
10 words
The method of claim 4 wherein said axis is horizontal.
Claim 7
Dependent Claim
16 words
The method of claim 3 wherein said supplies are rotated around the axis of said core.
Claim 8
Independent Claim
215 words
An apparatus for applying armor strips to an elongated core comprising: A. a plurality of supplies of said strip and a supply of said core, B. means advancing said core from said supply, C. means rotating said supplies of strip around the axis of said core at a speed having a selected ratio to the speed of advancing of said core, D. a like plurality of support brackets, E. means mounting said brackets radially of the axis of said core, evenly spaced around said core, F. a like plurality of support arms mounted on said brackets in planes passing through said axis, G. a plurality of pairs of rolls sufficiently heavy to twist said strip beyond its torsional elastic limit, H. means mounting one of said pairs at an upstream position and one of said pairs at a downstream position on each of said arms, said means spacing the rolls of each pair a distance sufficiently separated for the passage therebetween of said strips and sufficiently narrow to restrain said strips from turning, said arm being sufficiently removed radially from said core to bend said strip beyond its elastic bending limit on leaving the downstream of said pairs, the angle of said strip being naturally determined by said ratio and the diameter of said core.
Claim 9
Independent Claim
215 words
An apparatus for applying armor strips to an elongated core comprising: A. a plurality of supplies of said strip and a supply of said core, B. means advancing said core from said supply, C. means rotating said supplies of strip around the axis of said core at a speed having a selected ratio to the speed of advancing of said core, D. a like plurality of support brackets, E. means mounting said brackets radially of the axis of said core, evenly spaced around said core, F. a like plurality of support arms mounted on said brackets in planes passing through said axis, G. a plurality of pairs of rolls sufficiently heavy to twist said strip beyond its torsional elastic limit, H. means mounting one of said pairs at an upstream position and one of said pairs at a downstream position on each of said arms, said means spacing the rolls of each pair a distance sufficiently separated for the passage therebetween of said strips and sufficiently narrow to restrain said strips from turning, said arm being sufficiently removed radially from said core to bend said strip beyond its elastic bending limit on leaving the downstream of said pairs, the angle of said strip being naturally determined by said ratio and the diameter of said core.
Claim 10
Dependent Claim
20 words
The apparatus of claim 7 wherein the said upstream and downstream pairs are in a line parallel to said core.
Claim 11
Dependent Claim
17 words
The apparatus of claim 8 comprising means for adjusting the distance between said upstream and downstream pairs.
Claim 12
Dependent Claim
38 words
The apparatus of claim 7 wherein said bracket mounting means comprises a circular plate, means mounting said plate normal to the advance of said core and concentric therewith, and means for fixing said brackets evenly around said plate.
Claim 13
Dependent Claim
40 words
The apparatus of claim 7 comprising a spacer disk, means mounting said disk downstream of said rolls, said disk defining a plurality of evenly spaced radial guide slots for said strips whereby said strips are uniformly guided around said core.
Claim 14
Dependent Claim
11 words
The apparatus of claim 11 wherein said guide slots are radial.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |