Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Corrugating
Patent
1998-01-17
1999-10-26
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Corrugating
264540, 425525, 222530, B29C 4900
Patent
active
059722770
ABSTRACT:
Blow molding processes developed for producing plastic containers having an integral collapsible spout with self-latching bellow characteristics whereby, the centerline of integral collapsible spout (10) can be located either off centerline (34) or is centrally positioned (38) with containment body (32). In producing containers with integral collapsible spout (10) off centerline (34), the blow molding methodolgy requires parison flashing (12) to encapsulate integral collapsible spout (10) on both sides, along mold parting line (24), thereby, maintaining symmetry of the thickened cross-sectional wall portion, created by parison flashing (12). This technique improves the functionality of integral collapsible spout (10) and also allows it to maintain stability when collapsed to fully retracted position (14). Captive parison (36) is an alternate method that can be utilized when integral collapsible spout (10) is located in central position (38) of containment body (32). This method eliminates parison flashing (12) from self latching bellows sections (16), yet achieves the required functional characteristics when integral collapsible spout (10) is in fully retracted position (14).
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