Multichamber container with expanded interior walls

Details Multichamber container with expanded interior walls Multichamber container with expanded interior walls

1996-12-20

1998-12-15

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264531, 264532, 425525, 425530, 215 6, 220555, B29C 4918

Patent

active

058492410

ABSTRACT:
Multichamber tubular containers are made by extrusion or injection stretch blow molding. The containers usually will have two or three chambers and one or more web walls. The web walls are relatively rigid as formed. The web walls must be stretched laterally to increase their flexibility which is needed for the uniform dispensing of product from the tubular chambers. The webs can be stretched mechanically by the rotation of rods, such as stretch rods, or pneumatically by a differential gas pressure in the chambers while the webs are at or near the glass transition temperature and can flow. The web walls for a circular tubular container can be stretched up to about one-half the diameter of the tubular container.

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