GB818959A - Improvements in sewing machines - Google Patents

Abstract

818,959. Sewing machines. UNION SPECIAL MASCHINENFABRIK G.m.b.H. Nov. 1, 1957 [Nov. 5, 1956], No. 34106/57. Class 112 Closing filled bags, driving, stands. In a sewing machine for closing filled bags a feeler adapted to be engaged by a bag in its passage through the machine actuates a switch to start and stop an electric driving motor. The sewing machine 4 is connected by bars 3 to a sleeve 2 adjustably mounted on a column 1. The machine is belt driven by an electric motor 6 mounted on a bracket 5 carried by sleeve 2. Also mounted on bracket 5 is a switch relay (not shown) and a plug socket 8. The into casing 46. The shoe support which latter is connected by a plug 9 and cable 10 to a switch 11 mounted on a bracket 14 having a flange 20 secured by screws 22 under the work-supporting plate 23 of the machine. An arm 13, pivoted at 15, 16 on bracket 14 has an extension 17 at one end engaged by the spring-biased plunger 18 of switch 11 to position a finger 12 at the other end of arm 13 above the surface of plate 23. A bag on approaching the sewing position depresses finger 12 to close switch 11, via extension 17, for starting the motor 6, the latter being switched off by the opening of switch 11 when the completed bag frees finger 12. Work supports, threads cutting. Finger 12 is disposed in a notch 26 formed in a side edge of the throat plate 25. The latter is also formed in its trailing edge with a V-shaped notch M into which the free thread chain is carried by the inertia of the unbraked switched-off motor into contact with a conventional severing device.