Method and apparatus for producing retreading envelopes

Details Method and apparatus for producing retreading envelopes Method and apparatus for producing retreading envelopes

1978-04-28

1980-04-15

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

To form particulate product

156110R, 156118, 156122, 264150, 264177R, 2642102, 264292, 425325, 425381, 425466, 425467, B29D 2304

Patent

active

041983670

ABSTRACT:
A retreading envelope is made by extruding a split tube of rubber which is passed over a rotating stretching wheel to stretch the split tube to a predetermined shape. The stretched split tube is removed from the stretching wheel after moving around a part of the circumference thereof and is turned inside out and placed on a table whereat it is formed and cut into an annular shape preparatory to completion of the retreading envelope.

REFERENCES:
patent: 622774 (1899-04-01), MacLulich
patent: 1584283 (1926-05-01), Fraser
patent: 1643999 (1927-10-01), Semple
patent: 2229885 (1941-01-01), Crisp et al.
patent: 2423147 (1947-07-01), Hinman
patent: 2728104 (1955-12-01), Fisch
patent: 3273202 (1966-09-01), Zygan
patent: 3448183 (1969-06-01), Chisholm

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