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US3779845A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for the manufacture of reinforced flexible belts

Assignee: G Siempelkamp GmbH and Co KG
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Filing: 1970-10-14
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Granted: 1973-12-18
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Expires: 1990-10-14
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Abstract

Abstract System for the production of steel-wire-reinforced flexible belts consisting at least of an elastomeric or synthetic-resin upper layer, a core in which the steel strands are embedded and a lower layer of such material bonded into a unitary laminate while the reinforcing strands are tensioned; the invention resides in the use of an equalizing press adapted to bond the core to the steel strands prior to the application of the upper and lower layers and the final laminating phase. A supply means for each of the outer layers is provided downstream of the equalizing press and the layer is, in turn, downstream of a further supply system adapted to sandwich the generally planar array of longitudinally extending tension steel strands between layers of the core material.

Inventors

  • 👤 G Hutz
  • 👤 H Bongers

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 22:59
CPC Classifications
B; B29; B29D; B29D29/00; B29D29/06; B65; B65G; B65G15/00; B65G15/30; B65G15/32; B65G15/34; B65G15/36; B65G2201/00; B65G2201/06; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US2186771A Cited
US2719907A Cited
US2893466A Cited
US2797729A Cited
US3037895A Cited
US3239396A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-12-17 1977-06-18 1977-12-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-12-17 1981-06-18 1981-12-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-12-17 1985-06-18 1985-12-18 $7700.00 Window Closed / Lapsed

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