Apparatus for producing retreading envelopes

Details Apparatus for producing retreading envelopes Apparatus for producing retreading envelopes

1976-08-30

1978-09-26

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Adjustable shaping orifice or shape imparting insert member

264209, 425381, 425467, B29D 2304

Patent

active

041166051

ABSTRACT:
This invention relates to an improvement in the construction of retreading envelopes and to an extrusion apparatus for producing same.
The envelopes commonly used in bonding new treads to tire casings are generally uniform in thickness, and, as a result, no provision is made for those areas of the envelope which receive the greatest stress.
By utilizing an envelope of U-shaped cross section and one whose thickness is significantly increased in areas of greatest stress, the prior art impediments are effectively overcome.

REFERENCES:
patent: 1504653 (1924-08-01), Taylor
patent: 3229006 (1966-01-01), Nohl
patent: 3281896 (1966-11-01), Meyer et al.
patent: 3309443 (1967-03-01), Scott, Jr. et al.
patent: 3608137 (1971-09-01), Wilson

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