US3607499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making power transmission belts
Assignee: Owens Corning
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Filing: 1969-02-24
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Granted: 1971-09-21
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Expires: 1989-02-24
Abstract
Abstract A method of forming an annular rubber V-belt comprising the wrapping of a layer of vulcanizable rubber about a mandrel, winding a length of cord about the layer, wrapping a second layer of vulcanizable material over the wound cord, cutting the thus formed member into individual belt members, and curing the belt members. The cord is composed of a twisted together plurality of yarns; the yarns being composed of a twisted together plurality of strands; the strands being composed of a plurality of individual filaments of glass and the twist present in the yarns and strands being opposite. Preferably, the yarn assembly features one-half, 2 1/2 or 3 1/2 twists per inch.
Inventors
- 👤 Albert J Garbin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:55
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/447; B; B29; B29D; B29D29/00; B29D29/10; D02G3/22; D02G3/26; D02G3/28; F; F16; F16G; F16G1/00; F16G1/06; F16G1/08; D10; D10B; D10B2101/00; D10B2101/02; D10B2101/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
16 words
The method as claimed in claim 1, wherein the number of Z-twists per inch is three.
Claim 2
Dependent Claim
16 words
The method as claimed in claim 2, wherein the number of S-twists is 2 1/2 .
Claim 3
Dependent Claim
14 words
The method as claimed in claim 3, wherein the number of strands is five.
Claim 4
Dependent Claim
14 words
The method as claimed in claim 4, wherein the number of yarns is three.
Claim 5
Independent Claim
227 words
The method of manufacturing an industrial power transmission belt comprising: combining a plurality of continuous multifilament glass strands together while twisting to form a continuous yarn in which the central portion of the spiral defined by the twist conforms in slope to the central portion of the letter Z, combining a plurality of said yarns together while twisting to form a continuous cord in which the central portion of the spiral defined by the twist conforms in slope to the central portion of the letter S and the number of twists imparted to form the S-twist in the cord is a fraction in which the numeral 2 is the denominator and the numerator is an uneven whole integer between 1 and 5, inclusive, impregnating said cord with an elastomeric substance, wrapping a layer of vulcanizable rubber about a mandrel to form an annular member, winding a length of said cord about said layer in spiral fashion with succeeding winds in adjacent relationship, said spiral winding extending from lateral edge to lateral edge of said annular member, wrapping a second layer of vulcanizable rubber over said wound cord and coexTensive with said first wrap, cutting the so-formed multilayer annular member into a plurality of smaller width annular members, and curing said latter members under heat and pressure to form said power transmission belt reinforced with said glass cord.
Claim 6
Independent Claim
224 words
The method of manufacturing an industrial power transmission belt comprising: wrapping a layer of vulcanizable rubber about a mandrel to form an annular belt member, winding a length of cord composed of glass in spiral fashion about said layer with succeeding winds in adjacent relationship, said spiral winding extending from lateral edge to lateral edge of said annular member, said cord comprising a plurality of elastomer impregnated yarns twisted together in such fashion that the central portion of the spiral defined by the twist conforms in slope to the central portion of the letter S and the number of twists imparted to form the S-twist in the cord is a fraction in which the numeral 2 is the denominator and the numerator is an uneven whole integer between 1 and 5, inclusive, said yarns comprising a plurality of strands twisted together in such fashion that the central portion of the spiral defined by the twist conforms in slope to the central portion of the letter Z, said strands each comprising a plurality of substantially continuous glass filaments, wrapping a second layer of vulcanizable rubber over said wound cord and coextensive with said first wrap, cutting the so-formed cord reinforced annular member into a plurality of smaller width annular members, and curing said latter members under heat and pressure to form said power transmission belt.
Claim 7
Independent Claim
201 words
The method of manufacturing an industrial power transmission belt comprising: wrapping a layer of vulcanizable rubber about a mandrel to form an annular belt member, winding a length of cord composed of glass in spiral fashion about said layer with succeeding winds in adjacent relationship, said spiral winding extending from lateral edge to lateral edge of said annular member, said cord comprising a plurality of elastomer impregnated yarns twisted together to define a given direction of twist and a degree of twist characterized in that the number of twists per inch imparted to form the cord is a fraction in which the numeral 2 is the denominator and the numerator is an uneven whole integer between 1 and 5, inclusive, said yarns comprising a plurality of strands twisted together in a direction of twist opposite to that of the twist of said yarns, said strands each comprising a plurality of substantially continuous glass filaments, wrapping a second layer of vulcanizable rubber over said wound cord and coextensive with said first wrap, cutting the so-formed cord reinforced annular member into a plurality of smaller width annular members and curing said latter members under heat and pressure to form said power transmission belt.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |