Method of forming strip products from thermoplastic materials
US5171499A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Nov 5, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/722
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of forming an elongated trim strip product by first extruding a first strip of thermoplastic material from a die having an outlet with an area at least substantially as great as the desired cross-sectional area of the strip product in planes perpendicular to the direction of extrusion. Immediately subsequent to the step of extruding and while the extruded strip is still in a plastic state, it is passed longitudinally between cooperating forming rolls to shape the cross section of the extruded strip to the desired shape and cross section of the strip product. While the extruded strip is passing between the cooperating forming rolls, a backing strip of foil or thin metal is directed between the rolls in alignment with the extruded strip to bond the backing strip to the extruded strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.