Apparatus for blow molding with active ingredient in blowing gas

Details Apparatus for blow molding with active ingredient in blowing gas Apparatus for blow molding with active ingredient in blowing gas

1979-11-27

1982-06-22

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Including ventilating type hood or chamber encasing a...

Recovering or recycling gas or vapor

264 37, 264 83, 264538, 425210, 425533, B29C 1707, B29C 2500

Patent

active

043360157

ABSTRACT:
Articles, such as containers, can have their barrier properties improved either by using a small percentage of fluorine or other materials in the gas that is used at the blowing station of an injection blow molding machine. Some of these materials, such as fluorine are a hazard to operators of the machine. This invention encloses the operational stations so that the blowing gas mixture cannot escape into the atmosphere of the shop where the blow molding machine is operating. An inert gas such as nitrogen is mixed with the fluorine gas, and the enclosing housing is purged when the machine is shut down at the end of a run.

REFERENCES:
patent: 2892733 (1959-06-01), Gardner et al.
patent: 3789093 (1974-01-01), Bose
patent: 3862284 (1975-01-01), Dixon et al.
patent: 3930779 (1976-01-01), Farrell

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