Piping cutter with tensioning shoulders and movable clamp halves and knives

US5259328A · kind A · utility

Assignee

• Durkopp Adler Aktiengesellschaft · DE

Inventors

• Thomas Noltge · Bielefeld, DE
• Klaus Moller · Mutterstadt, DE

Key dates

• Filing date: Jun 2, 1992
• Grant date: Nov 9, 1993
• Expiry date: Jun 2, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/323
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A cutting device for a sewing system having a work table, and a material clamp on the work table for transporting sewing material to a cutting point. The cutting device includes two wedge-shaped knives arranged at the cutting point, for producing gusset cuts in the material, and an elongated opening in the work table for allowing the wedge-shaped knives to pass through the work table to cut the material. The cutting device further includes a clamping device for clamping the material at the cutting point so as to increase the tension in the material and thereby increase the controllability of the location at which the wedge-shaped knives make the gusset cuts. Preferably the camping device which includes two transversely movable clamp halves tightens the sewing material transverse to the direction of transport of the sewing material. Further, a slide plate attached to the surface of the work table includes shoulders or tensioning beads for tensioning the material. Because the material is held taut before the gusset cuts are made, the cuts can be made at well defined points, even in the case of very fine material.