Patent GB-191204516-A (GB)
Title: Improvements in or relating to Machines for Preparing Welted Boots and Shoes for the Sole-laying Operation.
Inventor: BOULT ALFRED JULIUS
IPC: A43D63/00
Filed: 1912-02-22
Granted: 1913-02-20
Abstract: 4516. Boult, A. J., [United Shoe illachinery Co.]. Feb. 22. [Addition to 18,445/09.] Trimming; welts and welting, machines for; sole - laying.-The weltbutting machine described in the parent Specification is furnished with a work - support which is arranged so that the work is presented first to the means which bevel the two ends of the welt simultaneously, after which it presents first the one side of the work and then the other to the pressing and tacking means. The shoe is placed on a jack pin pivoted for a limited swinging movement in the sleeved upper end of a post 73, Fig. 7, which is supported by a ball-and-socket joint 74 in a spring-pressed sleeve 75. The jack is moved to bring the shoe into the longitudinal position shown in Fig. 3, and is then moved in the direction of the arrow 93. During this movement, the shoe is guided by fingers 31, Figs. 1 and 3 extending-forwards from oppositely-inclined welt rests 28, 29, the front end of each of which is sloped at 30 to position the end 32 of the welt 33, as shown in Fig. 6; the front edges of the rests are sharpened to out away any inseam stitches that may extend too far back on the shoe. The rests are yieldingly mounted for independent movement in a frame 38, which is carried by parallel links 42, 43, and is normally held forwards and downwards by a spring 46. The shoe is pressed backwards until it engages an adjustable back rest 48, and continued pressure then causes the frame 38 to swing backwards and upwards to position the shoe properly for the operation of the welt-butting knives 27. These are carried by outwardly-flared depending arms 24, 25 of a block which is hung on a pivot 26 between arms 22, 23 carried by a bracket 3. The block is connected by a link 63 to a one-revolution clutch 58 on a shaft 61, which is driven from the main shaft 11. This clutch is put into gear during the backward movement of the frame 38 by the engagement of a trigger 53 with a spring-pressed clutch controller 54, with the result that the knives 27 are swung about the pivot 26 and slice off the welt ends to a bevel regulated by the angle of the surfaces 30 of the welt rests. To ensure that an accurate cut is made, yielding wipers 35 in the form of loops of wire are secured to the knife block in a position to rub over the welt in advance of the knives. After the welt ends have been bevelled, the shoe is pulled forwards and swung into the transverse position shown in Fig. 3, and is then forced on to a spring blade 5, which enters the welt crease and engages the stitches of the inseam. The pressure of the shoe causes the blade to spring upwards towards the nozzle 7 of a tacking- mechanism of ordinary construction, after which the operator depresses a treadle controlling a clutch 13 on the main shaft 11. This causes a rod 82, Fig. 7, to be moved to raise the jack into nail-receiving position, during which movement a cam-actuated lever 85 swings about its pivot and locks the jack against any further yield. The jack is then given a slight further upward movement to compress the stock against the tack nozzle 7, and a tack is driven. The shoe is then turned round, and the pressing and tacking operations are repeated on its other side. The upper tightening and tacking means may be similar to those described in Specification 22,839/08.