Patent GB-191419937-A (GB)
Title: Improvements in or relating to Machines for Folding the Margin of Leather or similar Material.
Inventor: GLASS PERLEY RICHMOND
IPC: A43D8/40
Filed: 1914-09-18
Granted: 1915-09-16
Abstract: 19,937. Glass, P. R. Sept. 20, 1913, [Convention date]. Folding edges of sheet material.-In machines for folding the margin of leather &c., particularly for folding parts of boots and shoes, and such as that described in Specification 15,405/12, improved means are provided for pleating the folded edge of the material. A hammer 150, Figs. 2 and 6, has a surface for pressing down a loop upon the body portion of the material, and a groove 181, Fig. 4, for preventing the next succeeding loop from being deformed or straightened out while the previously formed loop is being pressed. The fold is started by bending up the margin and completed by the hammer 150 co operating with an anvil 104 to press the margin against the body of the material, the co-operating surfaces being located in a plane which, in relation to the general plane of the work, is inclined upwardly away from a plough 30, Fig. 8, which initiates the fold, and upwardly away from the edge formed by the folded margin. The hammer 150 has combined and movable with it a foot 180 arranged to engage the work at a point substantially in line with the operative portions of a creaser 90 and folder 80, and to start the feeding operation as soon as the work is in position to have the first fold made, and before it is engaged by the hammer. A snipping-knife is provided and is rendered operative or inoperative by mechanism consisting of a cam bar 68, Fig. 2, the sliding of which brings a cup member 64 into or out of engagement with a ball end 56 connected by levers 54, 48 and a link 46 to the knife-lever 42. The bar 68 is pivoted at one end and actuated by a cam 62 on the driving-shaft 6. The feed-mechanism, consisting of a slide 120 carrying the hammer 150 and anvil 104, can be adjusted to vary the amount of feed by operating the slide 120 by an oscillating lever 174, Figs. 6 and 12, in a curved slot in which slides a block 172 connected by a link 170 to the slide 120. Movement of the block 172 towards or away from the pivot 9 of the lever 174 decreases or increases the stroke of the slide. The feed may be increased or diminished as the snipping-knife is thrown out of or into action by the mechanism shown in Fig. 12. The sliding of the cam bar 68 to stop the knife moves the block 172 along the slot away from the pivot 9 by a projecting arm 76 mounted on a shaft passing through a boss on the lever 68 and held rigidly thereto by the engagement of a pin 78 with two disks 71, 74 mounted on the boss and shaft respectively, the arm 76 contacting with a roller 77 extending from the block 172. This connexion can be rendered inoperative by moving the pin 78 so as to engage another hole in the disk 71 and so turn the arm 76 up into a non- engaging position. A gauge 32, Fig. 8, for determining the width of the folded margin by engaging the partially upturned edge of the material as it is fed past the plough 30, is made adjustable relatively to the folding-devices by a screw 37 which passes through a block 35 and bears against a lateral projection 38 on the gauge 32, the block 35 being itself adjustably secured to a bar 36. Part of the folding- devices is carried by an overhanging arm which also forms a support for the pivot of the snipping-knife lever.