Process for the production of a headrest with an articulated insert and apparatus for practicing this process
US5135593A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1991 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Feb 1, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1054
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for the production of a headrest with an articulated insert, comprises casting in situ polyurethane foam (7) within an external cover in which is disposed an insert (5) having articulated legs (4) that protrude from the cover, then hollowing out, by means of heating elements (2), swinging spaces (3) for the articulated legs (4) of the insert (5) by hot fusion of the external cover (6) and of the polyurethane foam (7) at the corresponding locations (8) of the headrest (1), and simultaneously heat sealing the external cover (6) and the surface of the polyurethane foam (7) bordering the swinging spaces (3). Apparatus for carrying out this process comprises a holding support for supporting thereon a headrest of polyurethane foam having embedded therein an insert (5) having articulated legs (4) protruding from the insert, and a structure (12) movable parallel to the legs (4) of the insert (5), and comprising two arms (13) each provided, at one of its ends, with a heating element (2) connected to a source of electricity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.