GB228619A - Improvements in sewing machines - Google Patents

Abstract

228,619. Armstrong, J. J. V., (Union Special Machine Co.). Nov. 7, 1923. Sack-sewing machines, -In sewing-machine for closing filled sacks &c. the sewing-head is mounted on rails and is traversed across the mouth of the sack which is held stationary. The machine-frame comprises uprights 2 on which are slidable brackets supporting a table 320 which can be adiusted to the desired position by chains 38 carrying counterbalance weights 40 and passing over sprocket wheels 39 rotatable by a handle 43. The sewing-head is supported by a carriage comprising depending brackets 15 and is mounted on three wheels, two of which are shown at 16, 18 running on rails 11, 12. Sacks are attached to hooks 48 secured to a rail 44 passing between the needle-arm 26 and work-support 27 of the sewing-head. A line of stitching is made across the sack just below the hooks, the reaction of the feed-dog against the sacking causing the traverse of the sewing-head. The stitching- mechanism is driven by a motor 52 which actuates a driving-wheel 51 through a belt 53. An arm 55 carrying a brake-block 59 is mounted so that the block may be moved into contact with the driving-wheel 51 by hand operation, the arm also carrying a switch-block 57 with finger-studs 58 by which the current to the motor is controlled.