Method of producing a compression-moulded plastic part comprising a neck which is equipped with a dispensing orifice
US8025825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2003 |
| Grant date | Sep 27, 2011 |
| Priority date | — |
| Expiry date | Sep 12, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/712
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for the compression molding of a plastic part including a neck which is equipped with an orifice, in which a blank is created and compressed. The part is molded with a neck which is equipped with a top wall including a thin area with a notch, the contour of this thin area defining the orifice, and two zones which can withstand the mechanical stress necessary in order to break the top wall at the notch. One of the two zones is intended to transmit the mechanical stress and the other is used as a support. The section of the notch is slightly inclined in relation to the axis of the neck. After molding, mechanical stress is applied to one part of the top wall, other than the thin area, so that the top wall tears at the notch, thereby producing the dispensing orifice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.