Process for manufacturing closed hollow bodies in elastomeric ma

Details Process for manufacturing closed hollow bodies in elastomeric ma Process for manufacturing closed hollow bodies in elastomeric ma

1978-07-13

1980-09-23

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including use of vacuum

264545, 264574, 264102, 264248, B29H 702, B29C 2702

Patent

active

042242762

ABSTRACT:
A process and a device are disclosed for forming a tennis ball which comprises the formation of two semispherical bowls in crude elastomeric material each having on its border a structural shape that is deformed by compression when the two semispherical bowls are pressed one against the other while a depressurization is effected in the joining zone of the two semispherical bowls on the outside of them.

REFERENCES:
patent: 1346848 (1920-07-01), Roberts
patent: 1365462 (1921-01-01), Crawford
patent: 1624849 (1927-04-01), Steele et al.
patent: 2726925 (1955-12-01), Saulino
patent: 2899711 (1959-08-01), Hawkins et al.
patent: 3825457 (1974-07-01), Holroyd et al.

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