Patent GB-617656-A (GB)
Title: Improvements in or relating to skiving machines particularly suitable for severing soles from shoes
IPC: A43D8/48
Filed: 1946-10-11
Abstract: 617,656. Splitting apparatus for leather. BRITISH UNITED SHOE MACHINERY CO., Ltd., PRATT, J. W., and BAGSHAW, C. M. Oct. 11, 1946 Nos. 30367/46 and 15355/47. [Class 31(i)] [Also in Group VII] A machine, more especially for shoe repairs for severing a partially removed worn sole at the waist by a bevelled transverse cut, comprises a feed roll 1 and a cooperating freely swingable work support 3 in the bite of which is arranged a skiving tool 7. The machine is somewhat similar to that described in Specification 592,317 but has means (1) to assist the feeding action of the feed roll of the work to the skiving tool, especially when the sole has been almost completely severed, and (2) means for moving the feed roll away from the work support to give access to the tool, which is mounted in a readily removable manner, for sharpening, &c. The rotary sole feeding roll 1 is pressed towards the quadrantal work support 3 by a heavy compression spring 53 which bears against the upper face of an arm 29, pivoted on a pin 41, on which the roll 1 is carried. Downward movement of the roll 1 is limited by a stop screw 57 which is set so that in the lowermost position of the arm 29 the feed roll 1 almost contacts the work support 3. The skiving knife 3 is removably held in an adjustable carrier 39 connected to the arm 29 by a link 93 adjustable in length to cause the knife to be tilted by an amount dependent on the thickness of work introduced. A bevelled forward face 99 on the member which clamps the knife on its carrier reduces risk of the sole under operation being trapped. The feed roll 1 has a serrated surface and may be driven continuously by a chain 13 from an electric motor through reduction gear box 67 as shown, or, alternatively, it may be turned in the direction of feed by a chain 105 connected at its lower end to a treadle 23 and at its upper end to the periphery of a sprocket wheel on the feed roll shaft 59, another chain 111 connected to a pulley 113 on the shaft 59 and to a spring 115 serving to return the feed roll to initial position on release of the treadle pressure by the operator. This latter arrangement is shown in chain dotted lines. To ensure thrust of sole against the skiving knife, the work support 3 is turned in the direction of feed by a chain 19 connected to the treadle 23 at its lower end and to a rearward portion of the arcuate peripheral surface of the support 3 at its other end. A pair of torsion springs 25 on the shaft 9, on which the support 3 is mounted, return the support on release of treadle pressure. Where the modified form of feed by chain 105 is adopted, the chains 19, 105 are connected to the treadle 23 by a balancing lever 117. A hand lever 47 is attached to the pin 41 on which the arm 29 is pivoted and, on turning it, eccentric side portions thereof cause the forward end of the arm 29 to be raised clear of the support 3 to afford access to the knife 7. A work-controlling finger may be positioned adjacent one side of the feed roll and yieldingly urged into engagement with the sole under operation to assist the feed roll in controlling the sole as it is fed to the tool, particularly where variations in sole thickness occur, to obtain a skived portion of more uniform width than might otherwise be possible. The first Provisional Specification describes a rotatable treadle-operated pawl carrying an arm which engages the side face of a ratchet wheel secured to a rod on which the work support is mounted and which, on operation, causes the work support to swing towards the skiving knife. It is returned under spring pressure.