Methodology for blow molding container with integral collapsible spout
US5972277A · kind A · utility
Inventor
Key dates
| Filing date | Jan 17, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Jan 17, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/463
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.