Patent GB-699365-A (GB)
Title: Apparatus for conditioning, as by roughening, the surfaces of shoe soles to provide a good bond for adhesive
Inventor: TEAL HARRY HENDERSON
IPC: A43D37/00
Filed: 1951-03-20
Abstract: 699,365. Roughening shoe soles. KELLY, J. H. March 20, 1951. No. 6633/51. Class 31(i). Apparatus for roughening a shoe sole prior to attaching it to a shoe comprises a rotary cutter 10 for advancing the sole and imparting a thrust thereto laterally of the direction of advance, a rotary resilient pressure roller 30 for retarding the advance of the sole and for co-operating with the cutter to form a throat 50 for receiving the sole, and guiding elements 24, 25 against which the edge of the sole is urged by the lateral thrust of the cutter, the elements 24, 25 being located adjacent to the entrance end of the throat and adjacent to the delivery end of the throat respectively. The guiding elements are provided on a block 20 having a key 18 which is received in slots 17, Fig. 2, in the surface of a table 13 and the block, which is provided with a recess 26, is adjusted fore and aft by means of a clamping pin wrench 21 the threaded portion of which passes through a slot 23 in the block and engages a threaded opening in the table 13. The cutter, which is mounted on a motor-driven shaft 2, has duplicate cutting profiles so that it may be turned end for end, and the teeth follow a left-hand helix. The pressure roller is mounted on a shaft 37 which is driven by means of gears 35, 36 from a shaft 34 driven from the shaft 2 through a speed reducer 5. A frame 38, which carries the bearings of the shaft 37 and a housing 42 for the gears 35, 36, is pivotally mounted on the shaft 34 and at its right-hand end 43 is provided with a socket 44 for receiving the upper end of a compression spring 45. When the sole is inserted in the throat 50 between the pressure roller and the cutter, the pressure roller is forced upwardly rocking the frame 38 about the shaft 34 and causing the spring 45 to be further compressed. The extent to which the throat may be opened is limited by means of a micrometric stop 51 comprising a post 52 mounted within a block 53 which can swivel about a pivot 54, the top of the post being adapted to engage an adjustable screw-threaded member 55 which is threaded through a hole in the frame 38 and is provided with a head 56 formed with notches which are engaged by a spring finger 57 attached to the housing 42. A spring-biased rod 61 has secured thereto a block 62 provided with a cam surface 63 which overlies a roller 58 provided at the rear face of the block 53. When a foot treadle is depressed to depress the rod 61, the cam surface 63 engages the roller 58 causing the block 53 to swing on the pivot 54 to move the post 52 from under the member 55 thus permitting the operator to open the throat 50 for the purpose of inserting and removing the sole without scoring it. Openings 15 are provided adjacent the curved edge of the cutter chamber 7 and also around the shaft 2 to permit a blower to draw air in for discharge through the delivery end 16 of the cutter chamber so as to remove cuttings therefrom and keep the cutter cool. When a wide roughened surface is required, two cutters are employed. The guide block may take a modified form, Fig. 7 (not shown), in which the guide surface 25 is replaced by a ball, or roller, bearing. The machine may be used for reducing (by bevelling) the forepart of a shoe sole and roughening it, and in this case the pressure roller is of frusto-conical form, Fig. 5 (not shown).