Title: Method and apparatus for the recovery of vulcanized elastomeric material

Abstract: Rubber is recovered for re-use e.g. from scrap pneumatic tires by briefly raising a surface of the tire to a high temperature and then rasping the heat-treated surface. Tires reinforced either with a textile or a steel ply can first be parted on opposite sides of the breaker structure. A machine is provided which accepts pieces of vulcanized material and progressively reduces them to heat-treated particles by repetitively heating a surface of each piece and attacking it with a rasping tool.

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Inventors: Bennett, William Douglas (Brownhills, EN)

Application Number: 732862
Filing Date: 1976-10-15
Publication_date: 1978-05-23
Assignee: Dunlop Limited (London, EN)
Primary Class(es): 241/23 157/13, 241/30, 241/DIG31, 521/45.5
Other Classes:
US Patent Ref:

1963943	Jun, 1934	Gross	241/DIG.
2494593	Jan, 1950	Suerdrup	260/720.
2543315	Feb, 1951	Fabregat	260/720.
2996109	Aug, 1961	MacMillan	157/13.
3364526	Jan, 1968	Varady et al.	157/13.
3721392	Mar, 1973	Burwell	241/DIG.

Other Refs: 573,053

Nov, 1945	UK.

Primary Examiner: Custer, Jr., Granville Y.
Assistant Examiner:
Attorney: Stevens, Davis, Miller & Mosher