B - Operations – Transporting – 29 – H
Patent
B - Operations, Transporting
29
H
18/133
B29H 5/04 (1980.01)
Patent
CA 1093262
TIRE RETREADING SYSTEM Abstract of the Disclosure Tire casings are retreaded with precured tread strips in a heated pressure vessel provided with pressure connections which effect simultaneous inflation of the tires and pressurization of the vessel while maintaining tire pressure above vessel pressure. Subsequently a pressure relief system permits the tires to exhaust faster than the vessel. Each tire is prepared for retreading by applying a bonding medium between the tire periphery and the retread strip and wrapping the resulting assembly with a fluid impervious flexible cover. Tread stabilization rings, wick material and non-stick polymer film may be inserted between the tread strip and the cover. The improvement according to the invention also comprises interposing between the tread strip and the cover, a thin, flexible perforated film of synthetic polymeric material which causes the flexible cover to slide against the surface of the tread strip and to thereby penetrate into the tread grooves so as to conform with the tread profile. A further improvement comprises interposing between the tread strip and the cover, at a location of the connection between the exhaust conduit and the cover, a pad of porous fabric which is stretchable in two directions to thereby aid in releasing air from the space.
345602
Brewer Donaldee
Brodie Edwin T.p.
Bandag Incorporated
Gowling Lafleur Henderson Llp
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