Hemming machine with fusing type slitter
OwnerRichard Lichtenberginventor
Life of this patent
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Abstract
A hemming machine has a first station with an ultrasonic slitting device for cutting woven material that has enough thermoplastic content to be cut and fused by an ultrasonic device. At a second station, a hemming device folds and sews the material and by providing only two folds, results in a three layer hem which does not fray because the edge has been fused by the ultrasonic slitting device.
Claims7
A hemming machine to hem material having sufficient thermoplastic content to fuse when exposed to heat generated by an ultrasonic device, said machine comprising:
- first and second laterally spaced apart lower conveyer belts;
- first and second laterally spaced apart upper conveyer belts;
- a slitting device for simultaneously cutting and fusing the edge of material fed therethrough, said slitting device extending between said first and second lower conveyer belts and between said first and second upper conveyer belts;
- said first upper belt and said first lower belt holding the material being fed between them prior to cutting and fusing by said slitting device;
- said second upper belt and said second lower belt holding the material being fed between them prior to and subsequent to cutting and fusing by said slitting device;
- a hemming device for automatically folding and sewing the edge of material fed therethrough to form a hem;
- and
- synchronizing means to feed and synchronize the flow of material from said slitting device to said hemming device, said hemming device being downstream from said slitting device.
The machine of claim 6 wherein said slitting device is an ultrasonic device capable of continuous cutting and fusing of material.
Dependencies are inferred from the claim text.