Apparatus comprising a ring-shaped nozzle, for manufacturing a hollow body comprised of plastic material
US4806093A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1988 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Feb 10, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7152
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In an apparatus comprised of a ring-shaped nozzle in a nozzle piece, which ring-shaped nozzle has a reciprocally movable nozzle cone piece, wherewith the cone piece and nozzle piece together define a ring-shaped nozzle opening, it is desired to modify the ring-shaped nozzle such that, in the manufacturing of hollow bodies, the amount of scrap can be reduced and the range of practicable applications of the apparatus can be extended. This is achieved in that an additional device or arrangement is provided for closing the nozzle opening. With the improved apparatus, one can achieve improvements in the hollow body being produced, the improvements being attributable to a special technique of closing the ring-shaped nozzle, which technique is enabled by the novel closure device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.