Patent GB-310217-A (GB)
Title: Improvements in or relating to leather rolling machines
IPC: C14B1/30
Filed: 1928-05-29
Abstract: 310,217. Wilson, E. G. May 29, 1928. Rolling leather.-In a leather rolling and finishing machine, of the type in which the material is passed between rollers, the upper of which is held in contact with the material by pressure and is adapted to be raised, for the insertion of the work, by actuation of a treadle connected to the upper roller support by links, the vertical position of the upper roller or rollers is adjustable independently of the treadle and without altering the treadle stroke or the pressure necessary to part the rollers. The lower roller 3 is mounted in the frame 1 and co-operates with the roller 2 movable vertically in the frame, the rollers being driven by gearing from a shaft 13 adapted to be actuated alternately in opposite directions. The roller 2 is carried in arms on a hollow pillar 39 attached by a pin 40 to a strut 41 having at its upper end a cup-shaped recess in which is disposed a block 42 on which a lever 29 rests. A pin 43, secured in the pillar 39 and passing through the strut 41, is attached to arms 44 one on each side of the strut, the arms being connected together at the upper end by a bridgepiece 45 between which and the lever 29 a spring 47 is disposed. The pillar and strut are provided with tapered adjacent faces so as to permit them to swivel relatively to each other about the pin 40 or block 42 in case of inequalities in the material under treatment. The roller 2 is adjustable transversely to its axis by means of plates engaging the pillar 39 and movable by means of screws in the walls of the part 1<a> of the framework. The outer face of the part 1<a> of the framework is constituted by a plate 31 held in place by screws passing through slots in the plate. The plate is adjustable by means of set-screws' 38 passing through lugs on the plate and engaging the top and bottom of the part 1<a>. The plate is provided with lugs 31b in which is journaled a shaft 30 having an eccentric portion 30<a>, the shaft being provided with an operating-handle 32. The eccentric portion 30<a> forms the pivot for the lever 29 which is held to the shaft by a partially-split clamping-member 33 encircling the eccentric portion 30<a>. The clamp is provided with a screw 34 and handle 35 to permit it to be clamped on the shaft and prevent its movement. The other end of the lever 29 is secured to a rod 27 on which detachable weights 28 are mounted for the purpose of applying the necessary pressure to the roller 2. 'The rod 27 is connected to a treadle 24 carried in a cradle 23 loosely mounted on a cross spindle 2 adapted to be secured in any of a number of different positions in brackets 21 secured to the frame 1, the spindle 22 thus serving as an adjustable fulcrum for the treadle to enable additional weights to be carried on the rod 27 without preventing operation of the treadle. The surface on the rod 27 which is engaged by the treadle is curved so as to form a rolling fulcrum. Since alteration of the position of the fulcrum 22 alters the throw of the lever 29 and consequent movement of the roller 2, the latter is adjusted relatively to the roller 3 by means of the plate 31, the separation of the rollers being less than the thickness of the leather. The position of the roller 2 can also be adjusted without moving the plate 31 or treadle 24, by rotation of the shaft 30.