B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/1005
B29D 29/10 (2006.01)
Patent
CA 1150467
ABSTRACT A method of producing endless drive belts of natural or synthetic rubber with thread-like embedded strength carriers which preferably extend in the longitudinal direction. This method relates especially to multiple V- belts and similar belts having longitudinal ribs extend- ing continuously over the inner periphery or circumfer- ence thereof. A raw belt member is built up in upside- down sequence of layering, and is placed into an outer form or mold, in which it is formed-out and vulcanized. The belts are then turned or folded or rolled over into the use condition thereof. The raw belt member, which is pro- duced oversize with respect to the outer form or mold, is retracted, pulled-in, or drawn-in to an outer diameter cor- responding to the smallest inner diameter of the outer form, and is expanded within the outer form to, or essentially to, the original outer diameter thereof. The raw belt member may be subjected to a pressure drop effective from the out- side toward the inside for retracting, pulling-in, or draw- ing-in the diameter thereof. The raw belt member has strength carriers of synthetic polymers which shrink in the heat, and may be subjected to an elevated temperature for retracting, pulling-in or drawing-in the diameter thereof.
342512
Continental Gummi-Werke Aktiengesellschaft
Fetherstonhaugh & Co.
LandOfFree
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