Apparatus for molding a container with offset parting line
US4337025A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1980 |
| Grant date | Jun 29, 1982 |
| Priority date | — |
| Expiry date | Aug 25, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C49/48
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A mold assembly is provided for making a thermoplastic container having a bottom, side and unitary closure or top wall means with a parting line along a plane of symmetry in the bottom and sidewall means but with the parting line offset on the top wall means to define a generally flat, pierceable membrane on a major portion of the exterior surface of the top wall means. The mold assembly molds and seals the container from a tube of thermoplastic material, which assembly includes mold parts having lower sections adapted to open and close relative to a center parting plane to shape the bottom and sidewall means of the container and having a pair of upper sections adapted to shape the unitary closure. One of the upper sections has a removable protuberance for forming a major portion of the container top closure surface with the mold parting line thereon offset relative to the center parting plane of the mold assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.