Process for producing a cushioning article
US6537472B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Feb 27, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/751
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a cushioning article, which comprises: providing an injection molding apparatus having plural injection orifices, said orifices each having a discharge angle from 5° to 45° inclining from the vertical direction; injecting a thermoplastic polymer material in the form of strand from said plural orifices into a mold; and cooling said mold followed by demolding. The discharge angles of said orifices as projected into a horizontal plane each preferably has a phase difference of from 5° to 120° relative to those of adjacent orifices. Also disclosed is a cushioning article molded by the production process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.