Apparatus for forming a composite tape
US4053269A · kind A · utility
Inventor
Key dates
| Filing date | Feb 26, 1975 |
| Grant date | Oct 11, 1977 |
| Priority date | — |
| Expiry date | Feb 26, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2309/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for forming a composite tape having a foraminous fiberglass core includes the step of treating a continuous strip of foraminous material with adhesion promoting and stiffening material. The treated strip is preheated to a temperature approximately equal to the extruding temperature of two ribbons of flexible vinyl thermoplastic material which are simultaneously formed in a subsequent step and coated under pressure on each side of the heated fiberglass core material through a suitably dimensioned die opening. Application of pressure forces at least portions of the extruded two ribbons into the interstices of the foraminous core material to cause the opposing ribbons to fuse to each other by penetrating and filling the interstices to form a unitary mass and to provide a textured surface or "intaglio" effect which has an appearance which is dimensionally related to the surface finish of the core material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.