Container with an encapsulated top insert and method and apparatus for making same
US4707966A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1981 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Aug 26, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7158
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus and method for molding, forming and filling a container having an insert at the container top are disclosed. According to the preferred form of the method and apparatus, a length of a hollow tube parison is extruded and then cut, molded, and filled while positioned between main mold halves. A stopper or like insert is tranferred to a holding and insertion member and when a blowing and filling nozzle has been completely removed from the top opening of the filled container, the blowing and filling nozzle and the insertion member that is carrying the stopper are moved together to position the insertion member and stopper over the container. The insertion member is then moved downwardly to deposit the stopper within the upwardly extending portion of the parison tube. Upper sealing molds are then closed to form the upper portion of the parison around the stopper to partially encapsulate the stopper. A frangible web may also be formed by the upper sealing molds in a portion of the parison circumferentially around and above the stopper while using the insertion member as an anvil. A break-off tab or overcap may be subsequently formed above the stopper at the frangible web by an …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.