Sewing – Elements – Frames
Patent
1989-10-10
1992-03-03
Nerbun, Peter
Sewing
Elements
Frames
11212112, 112104, D05B 2100
Patent
active
050922580
ABSTRACT:
A method and apparatus for automatically making a pocket opening having a flap and a pocket bag, one half of the pocket-bag blank being sewn to the workpiece together with the flap and the piping strip. The formation of the seam takes place as a function of the detected presence of the flap. During the transport of the workpiece, flap, and blank to the sewing place, the part of the pocket-bag blank which rests on the flap is lifted off of the flap, the presence of the flap is detected by an opto-electronic sensor, and the pocket bag is again placed on the flap before the parts are sewn together. The sewing machine is controlled in response to the sensor so that the seam corresponds precisely to the length of the flap. The pocket-bag blank is lifted off and replaced on the flap by a folder which has an arrangement of guide plates for carrying out the invention.
REFERENCES:
patent: 4034689 (1977-07-01), Hintzen et al.
patent: 4281606 (1981-08-01), Beisler
patent: 4589358 (1986-05-01), Goldbeck et al.
patent: 4928608 (1990-05-01), Schips
Goldbeck Heinz
Schalk Eckhard
Durkoppwerke GmbH
Nerbun Peter
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