D - Textiles – Paper – 05 – B
Patent
D - Textiles, Paper
05
B
112/74
D05B 35/02 (2006.01) D05B 35/10 (2006.01) D05B 29/06 (2006.01) D05B 65/00 (2006.01)
Patent
CA 1065196
ABSTRACT OF THE DISCLOSURE There are provided improvements relating to sewing machines for use in the textile field where two or more layers of material are to be sewn together with a conventional sewing head. In the sewing apparatus, there is provided a positioning member for positioning the layers of fabric to be sewn in which one layer passes above and the other below the positioning member; the positioning member includes first means for displacing a pressurized gaseous flow along one major surface of the positioning member to position the first layer of material and a second source of a gaseous flow along the other of the major surfaces of the positioning member to position the other layer of material. There is also provided, in another embodiment, drive means for engaging the surface of one of a pair of layers of material to be advanced to a sewing machine with pneumatic means for reciprocating the drive means into and out of fabric engaging positions with pneumatic means for recipro- cating the drive means and a rotatable drive component for the drive means which is flexibly connected to the drive means to be displaceable with the drive means. Still further, there is also provided a detecting means for detecting the movement of fabric in which there is included time delay means associated with a sensing means, thread cutting means being provided for cutting thread from the sewing machine and means for reciprocating the thread cutting means into and out of a thread-cutting position in response to the movement of the fabric in a time delayed relationship.
271916
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