Piping cutter with tensioning shoulders and movable clamp halves

Details Piping cutter with tensioning shoulders and movable clamp halves Piping cutter with tensioning shoulders and movable clamp halves

1992-06-02

1993-11-09

Crowder, Clifford D.

Sewing

Special machines

Buttonhole

112 70, 112129, 83175, D05B 310, B26D 104

Patent

active

052593282

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.

REFERENCES:
patent: 3747545 (1973-07-01), Nicolay et al.
patent: 3763802 (1973-10-01), Champney et al.
patent: 3934776 (1976-01-01), Cruden, Jr.
patent: 3980030 (1976-09-01), Fischer et al.
patent: 4481895 (1984-11-01), Asao et al.
patent: 4589358 (1986-05-01), Goldbeck et al.
patent: 5109785 (1992-05-01), Inoue et al.

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