Patent GB-190705436-A (GB)
Title: Improvements in and relating to Machinery for Cutting or Slitting and Folding the Edges of Leather and other Sheet Material.
Inventor: BROOKES ALFRED GEORGE
Filed: 1907-03-06
Granted: 1907-12-31
Abstract: 5436. Brookes, A. G., [Boston Machine Works Co.]. March 6. Bending.-Relates to machines for cutting or slitting and folding the edges of leather or other sheet material. Fig. 16 shows a part of a boot upper 3, and the manner in which it is slit at the part 2 by the machine prior to the folding of the edge. The work 3 is placed on the table A, Figs. 1 and 11, with the edge to be operated upon against the gauge E and overlying the folder D, which serves also as the cutting-bed. The work is held in position by the holder B and creaser-plate C, while the slitter F descends to slit the edge, Fig. 11. The slitter then rises, followed by the folder D, which turns the edge upwards against the creaserplate C. The folder then advances, as shown in Fig. 13, to turn the edge over the creaser-plate, after which the creaser-plate is pressed down to finish the fold. The holder B comprises a number of spring-controlled pins mounted in a member 25 carried by the tubular arms 29, Figs. 1 and 6, the pins passing through slots in the creaser-plate C, Fig. 5, which is carried by the rods 79 movable in the arms 29. The arms 29 are connected by a cross-head 30, which has a pivoted plate 32 carrying an adjustable stop 33 to engage a spring-controlled stud 34 on the lever 35, which is loose in the shaft of the cross-head 30 and is operated by a cam on the shaft 5. The shaft 30 has also an arm connected by a slotted link to a lever engaged by the treadle-operated lever 16, Fig. 18. When the treadle is depressed, the holder is pressed down on the work, and is maintained in that position by the cam acting on the lever 35. The shaft 6 is driven from the pulley 7, Fig. 18, by the engagement of the pin 19 with the pivoted spring-controlled arm 17. At the end of the revolution, the cam 172 on the end of the lever 16 forces the arm 17 out of the path of the pin 19, and so stops the machine. Any other suitable clutch mechanism may however be employed. The rods 79 carrying the creaser-plate are connected to a cross-head, which is acted on by springs to hold the creaserplate in the position shown in Figs. 11 and 13, and is moved at the proper time by a cam to shift the creaser-plate from under the folded edge 2 before the final pressure of the folder D on the fold. The slitter F is carried by the folder, and is operated, through the linkage 45, 46, 47, Fig. 1, by the pin 50 actuated by a cam on the driving-shaft 6. As the shaft 6 rotates a number of times for each revolution of the cam-shaft 5, provision is made for throwing the pin 50 out of alinement with its coacting stud 53, after it has once operated the slitter and until the shaft 5 has completed its revolution. The spring 49 holds the slitter normally elevated. The folder D, which may be of any known construction. is carried by the frame 58, which is connected by the shaft 48 to the forked frame 59 pivoted on the shafts 60, 161. The upward movement of the folder to raise the edge 2 is effected through the toggle-mechanism 61, 62, by the cam-actuated lever 65 engaging the arm 64 of the lower toggle member. The toggle is carried beyond its dead centre and knuckled on the opposite side, thus effecting also the downward movement of the folder to set the fold. The toggle is returned by the spring 70, the tension of which can be regulated by an adjustable collar having a locking arrangement 72, 73. The toggle is adjustable for different thicknesses of material by an eccentric 72<a>, which is screwed in the adjusted position by a pin on the spring arm 74 engaging one or other of the holes 75 in the locking-plate 76. The parts B, C, D, F are removable and interchangeable, the plate 32 being pivoted so that it can be swung to one side, to permit the parts 29, 30 to be raised for the purpose of removing the folder and slitter.