Patent GB-785922-A (GB)
Title: Improvements in or relating to machines for roughing shoe parts
IPC: C14B1/48
Filed: 1955-07-07
Abstract: 785,922. Roughing shoe soles. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). July 6, 1956 [July 7, 1955], No. 19609/55. Addition to 687,260. Class 31 (1). [Also in Group XXIV] In a machine for roughing the margins of shoe soles as described in the Specification of the main patent, which is referred to, (a) the roughing tool 36, Fig. 3, is movable horizontally into different operating positions relatively to the concentric work-supporting sleeves 38, 40 so as to vary the distance inwardly of the edge of the sole to which the tool roughens the sole; (b) upper and lower workpiece guiding members 73, 125, Fig. 5, are provided outside the sleeves 38, 40 to facilitate the insertion of the workpieces; and (c) means are provided for limiting the axial yielding movement, away from the roughing tool, of the inner sleeve 38 relatively to the outer sleeve 40. The tool 36, Fig. 3, is secured to a rotatable shaft 170 mounted in a bearing housing 158 carried by a plate 154 which is adjustable in a guideway 152 secured to a fixed table 58 of the machine. The upper workpiece guiding member 73 comprises an arcuate abutment surrounding a portion of the roughing tool and fixed to a cover of the machine. The lower workpiece guiding member 125 is in the form of an arcuate rest secured to the table 58. The lower ends of the depending shanks of the sleeves 38, 40 are operatively connected to the free ends of pivotally-mounted arms 94, 106, Fig. 3, provided with slots 116, 126 in which are adjustable nuts 118, 128 secured to the lower ends of springs 122, 131, the upper ends of which are secured to the table 58. To allow insertion of the workpieces, the sleeves 38, 40 can be lowered by a chain 140 connected to treadle mechanism. When the machine is at rest, a lower face 142 of the inner sleeve 38 is arranged a distance 144 above the bottom of a well 146 in the outer sleeve 40, the distance 144 being substantially equal to the distance the upper face 136, Fig. 5, of the sleeve 38 projects above the upper face 134 of the sleeve 40. Accordingly, when the sleeve 38 is lowered by the chain 140, it will be depressed relatively to the sleeve 40 until it abuts against the bottom of the well 146, the sleeve 40 thereafter moving downwardly with the sleeve 38. Downward movement of the sleeves 38, 40 continues until a shoulder 147 of the sleeve 40 engages a shoulder 149 of a drive sleeve 68 to which the sleeves 38, 40 are keyed. The outer sleeve 40 is provided with a bevelled lip 137, Fig. 5, to facilitate the insertion of the workpieces. The rest 125 has a flat upper face 127 and a rounded surface 129, Fig. 4, which is substantially continuous with a convex face 133 of a yieldable support 135 mounted on a pivotally-mounted spring-influenced carrier 139 upon which are also mounted a driven feed roll 42 and a freely-rotatable edge gauge 48. The feed roll 42 co-operates with a driven feed wheel 44 to feed the workpieces. Prior to inserting the work, the carrier 139 can be depressed, to depress the feed roll 42, by a chain 282, Fig. 4, connected to the treadle mechanism. The roughing tool is adapted to cut a rough margin which is spaced from the edge of the sole by a smooth margin and for this purpose is provided with a plurality of circumferentially-spaced cutting blades 52, each of which has an inner untoothed cutting edge portion 180 and an outer toothed portion 184, both of which are arranged to lie substantially on a frusto-conical surface. Each blade has a plurality of cutting edges along its upper and lower edges which may be used successively by inverting and/or reversing the blades. The teeth of alternate blades are staggered lengthwise of the blades. Blades of an alternative type are also provided for use when the roughened margin is to extend to the edge of the sole.