Process for producing a container with at least one chamber form

Details Process for producing a container with at least one chamber form Process for producing a container with at least one chamber form

1992-08-28

1994-12-20

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Shaping against interior of a forming surface by rotation of...

264 83, 264512, B29C 4900

Patent

active

053743890

ABSTRACT:
In a double chamber container, the inner chamber is formed by a tubular body of an elastic rubbery material stretched in order to expel a pressurized substance against its own elasticity. To obtain a precise stretching ratio of the tubular body and to empty it as well as possible, the tubular body converges uniformly and its walls have a uniform thickness, even in their bottom part. To attach the tubular body to the container, a collar which acts also as a seal is formed on the thereon. A process for producing the tubular formation includes bringing an elastomeric material into the flowable condition and coating it over a mandrel, and applying a cooling medium detachable from the mandrel over the mandrel initially and/or applying a treatment medium detachable from the mandrel over the latter subsequently, for the controlled alteration of the surface on the mandrel side of the elastomeric material. At least the mandrel can be set into rotation during application of coating or treatment medium and/or of the elastomeric material, for enhancing the distribution of the medium or material by centrifugal force.

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