Sectional construction strip, e.g. for the production of window frames

US4281492A · kind A · utility

Assignee

• SCHOCK GMBH · DE

Inventors

• Karl Schock · Schorndorf, DE
• Lothar Frank, deceased · Schorndorf, DE

Key dates

• Filing date: Jun 19, 1979
• Grant date: Aug 4, 1981
• Expiry date: Jun 19, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/25
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The strip comprises a tubular section of thermoplastic material, e.g. PVC, and a fill comprising a matrix of methylmethacrylate with silicate spherules as a filler, reinforced by glass filaments under tension. In production, cold methylmethacrylate is pressed in the extruded section while it is still hot.