US3909176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the manufacture of bands reinforced with longitudinal wires
Assignee: Industrie Pirelli SpA
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Filing: 1974-05-03
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Granted: 1975-09-30
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Expires: 1994-05-03
Abstract
Abstract An apparatus and method for making flat strips of wire reinforced elastomeric material free from compressive stresses from split extruded tubes comprises a means for supporting the tube wall as it passes from a circular to flat cross-section, said means having contour changes along its length to prevent the wires from exerting compression on the rubber comprised between them.
Inventors
- 👤 Nino Madonini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:30
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/38; B29C; B29C48/00; B29C48/001; B29C48/0022; B29C48/15; B29C48/151; B29C48/152; B29C48/153; B29D29/00; B29C2793/00; B29C2793/0063; B29C48/0019; B29C48/03; B29C48/09; B29C48/10; B29C69/00; B29C69/001; B29C69/002; B29C69/003; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29K2105/25; B29K2105/253; B29K2105/256
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
134 words
In an apparatus adapted to extrude a wire reinforced elastomeric tube, split the tube longitudinally and flatten the split tube, means for supporting the cut tube as it is flattened and to thereby maintain its reinforcing wires at a constant distance from one another during its passage from tubular to flat form, said support means having the contour of an arrangement of a plurality of wires equally spaced circumferentially from each other at one end around a circle and equally spaced along a straight line and weighted at the other end to subject the wires to tension, said wires being connected to each other at spaced points between said ends by elastic members under flexion, the planes of the circle, the straight line and the elastic members lying on planes parallel to each other.
Claim 2
Dependent Claim
134 words
In an apparatus adapted to extrude a wire reinforced elastomeric tube, split the tube longitudinally and flatten the split tube, means for supporting the cut tube as it is flattened and to thereby maintain its reinforcing wires at a constant distance from one another during its passage from tubular to flat form, said support means having the contour of an arrangement of a plurality of wires equally spaced circumferentially from each other at one end around a circle and equally spaced along a straight line and weighted at the other end to subject the wires to tension, said wires being connected to each other at spaced points between said ends by elastic members under flexion, the planes of the circle, the straight line and the elastic members lying on planes parallel to each other.
Claim 3
Dependent Claim
12 words
The apparatus of claim 1 wherein the elastic members are flexed springs.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |