Patent GB-191230049-A (GB)
Title: Improvements in or relating to Sole-pressing or like Machines for use in the Manufacture of Boots and Shoes.
Inventor: BOULT ALFRED JULIUS
IPC: A43D89/00
Filed: 1912-12-31
Granted: 1913-12-24
Abstract: 30,049. Boult, A. J., [United Shoe Machinery Co.]. Dec. 31. Sole-levelling.-A sole-levelling machine of the type described in Specification 10,883/95 is provided with two rolls disposed to act simultaneously on* opposite sides of the sole, and has mechanism that acts automatically and independently of the last to vary the inclination of the axes of the rolls to the horizontal during the operation of the rolls on the shoe. The machine described is provided with two jacks and pairs of rolls for operating on both right and left shoes. Each sole-pressing roll 9 of a pair is mounted in a block 15, which is rapidly reciprocated in guides 14 in a roll-carrying frame 11 by connexions to an eccentric 25. The frame 11 is secured upon the forward end of a hollow shaft 12 mounted in a bearing 13 formed in a roll-carrying bed 10. Each roll is provided with a bed 10, and each pair of beds is so formed that one bed overlies the other. The beds are provided with semi-cylindrical trunnions 27 mounted in bearings in the machine frame and cut away on opposite sides of their axial line to permit independent movement of the beds. Each bed is pressed downwards by a spring 29 engaging at its upper end a stop on an adjusting nut 33 screwed on a rod 30 secured to the machine frame, and at its lower end a plate 34 freely movable along the rod 30 and connected through rods and pivots to the bed 10 just over the bearing 13. A stop limits the downward movement of the bed. The shafts 12 carrying the rolls are oscillated to vary the inclination of the rolls when operating upon different parts of the sole, the corresponding rolls in connexion with the jacks for operating on the right and the left boot being coupled together so as to be given the same inclination. The shafts 12 are provided at their rear extremities with arms 42,42<1> provided with segmental gears 43, 43<1> engaging racks 44, 44<1> sliding in guides in the frame. The racks 44 for operating the outer rolls for the pair of jacks both gear through racks 46 with a pinion 47 mounted in the frame ; a similar arrangement connects the racks for operating the inner rolls. The rack bars are independently reciprocated to rock the rolls, the bar 45 carrying the rack 44 being connected by a link 48, Fig. 3, with an arm 49 of a bell-crank lever pivoted to the frame of the machine. The other arm of the lever is connected by a universal joint to a link 51, the lower end of which is connected by a second universal joint with a lever 52 pivoted to the frame of the machine at 52‹, Fig. 4. The lever 52 is provided with a cam roll 53, which engages a cam-groove formed in a cam disk secured to the cam-shaft 1. To vary the amount of inclination thus given to the rolls, the link 48 is connected to the arm 49 of the bell-crank lever by a pivot 55, which may be adjusted along a slot formed in the arm. The pivot is moved along the slot by a link 56 connected to a slide 57 by an adjusting-device 58. The slide 57 is adapted to be moved at certain times so that a desired alteration in the lateral inclination of the roll when operating upon the shank and the forepart of a shoe is obtained, by a link 59 connected to the slide 57 and having its lower end adjustably connected with a slotted lever 60. The lever 60 is provided with a segmental gear 61, which engages a segmental gear 62 formed on one end of a lever 63, Fig. 4, the other end of which carries a cam-roll engaging a camgroove formed in the face of a worm-wheel through which the cam shaft is driven. A similar mechanism operates the racks 44<1> connected with the other pair of rolls. To compensate the action of the lever 52 for varying styles of shoes, a cam is arranged to engage a roll 66 carried by a lever 67. The lever 67 is connected through a link 68 to a lever 69, the other end of which is connected through a link 70 with a block 71, which carries the cam roll 53 and is mounted to slide in a slot 74 in the lever 52. The roll 53 is thus shifted to modify the timing of the cam acting on the cam roll 53. In order to vary the movement of the roll 53 in its slide, the link 68 is connected with the lever 67 through an adjusting device 75, which may be altered for different types of shoes. A corresponding device operates upon the cam controlling the swing of the other pair of rolls.