Patent GB-163777-A (GB)
Title: Improvements in or relating to machines for finishing or otherwise treating edges on ieces of leather
IPC: C14B11/00
Filed: 1920-02-21
Abstract: 163,777. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). Feb. 21, 1920. Sheet material, finishing edges of.-Relates to machines for curling edges on pieces of leather by shrinkage, as described in Specifications 26300/02 and 104,207, and consists in the provision with shrinking-means of automatic means for controlling the degree of heat applied and the duration of operation of the tool, of mechanism for registering the linear extent of the work passed through the machine, of an improved disappearing edgegauge, and other constructional details. The invention is described as embodied in a machine of the kind described in Specification 101,150, in which the work is fed beneath an electrically heated tool 9, Fig. 1, by a turn-table 11 and a feed-wheel 13 which crowds the edge of the hot material into a groove in a moulding wheel 15. To vary the heat of the tool with the thickness of the work, the short-circuit plate 29 of a rheostat controlling the heating-current is connected by a bar 95 to a. pivoted arm 33, Fig. 3, having a link 37 connected to the lever 19, movement of which raises and lowers the machine head 17. As the head is lowered, more resistance contact points 31 become effective and the resistance is thereby increased. When the head is raised the temperature is at its maximum. Further, to reduce the rate of feed with the thickness of the work, the drive shaft 39 has a cone 41 between which and a. cone 45 on a countershaft 43 is a loose band 47 controlling rotation of the countershaft. The band 47, Fig. 3, passes round a pulley 55 on a slidable rod 53 embraced by a yoke on a bellcrank lever 51 having a pin-and-slot connection to the arm 33. The arm 19 is connected by a link 61 to a rock-shaft 65 to which is pivoted the treadle-rod 69, and a spring 71 normally holds the rear end of the arm 19 raised. The position of the arm 19 also controls one of the clutch members of a registering-mechanism, through the bar 95, a groove 97 in which is of such length that, when the head is lowered to its operative position, the groove engages a roller 99 on an arm 101 fast to a rook-shaft 87 having an arm 85 connected to a spring-pressed clutch member. When the head is raised, the roller 99 leaves the groove and disengages the clutch to stop the numbering-wheels. The edge-gauge 105, Fig. 7, is mounted on a spring-pressed rod 107 connected to a rod 119 passing up through the spindle of the moulding- wheel 15 and contacting at its upper end with a conical-ended sliding sleeve on the shaft of the feed-wheel 13. The sleeve is controlled by a push rod 122 which, when pushed in, causes the disappearance of the edge-gauge when the head is lowered. To counteract the effect of gummy substances exuded by the hot leather, and to facilitate the feeding of the work, the work-plate is provided with counter-sunk slots to receive two slides 123, 125, Fig. 4, connected by a bar 127 and reciprocated by a point-cam 133 on the feed mechanism co-operating with a roll 137 on the slide 123. The slides 123, 125 are supplied with oil by wicks 131 dipping into an oil tube. A finger 128 on the slide 123 thus oils the turntable 11, and the wick 131 oils the wheel 15.