Patent GB-412230-A (GB)
Title: Improvements in or relating to machines for creasing and/or burnishing leather or like articles
IPC: C14B11/00
Filed: 1932-12-22
Abstract: 412,230. Burnishing by compression. BRITISH UNITED SHOE MACHINERY CO., Ltd., REID, R. G., and BROWN, J. H., Union Works, Belgrave Road, Leicester. Dec. 22, 1932, No. 36274. [Class 60.] Relates to machines for burnishing the edges of leather or like articles, such as stained or waxed strips of leather or like material which are to be made into straps, dog-leads &c. The machine comprises a small frame or pedestal 1, Fig. 1, adapted to be secured to a bench, provided with a bearing for a feed-shaft 3 which has secured at one end a gear-wheel 5 having internal teeth, and at the other end a work feed-roll 25 with a roughened work-engaging surface. The wheel 5 meshes with a pinion 7, rotatably mounted on a spindle 9 fixed in the frame 1, in mesh with a second pinion 11 secured on one end of a shaft 13, so that the shafts 3 and 13 rotate in opposite directions. The shaft 13 is directly above the shaft 3 and is rotatably mounted in a bracket 15 pivoted on the spindle 9. The bracket 15 is pressed downwardly by a spring plunger 17, and can be adjusted vertically by a screw 19 mounted in the frame 1, the above arrangement enabling the shaft 13 to swing about the spindle 9 without interrupting the engagement of the pinions 7, 11. A rearwardly extending arm connected to the bracket 15 may be connected to a treadle for moving the shaft 13 away from the feed-roll shaft 3. The shaft 13 may have secured thereto a creasing-wheel 27, or a loosely mounted collar adapted to be rotated by engagement with the work piece. The outer end of the shaft 13 is supported against upward movement by a yoke 31 adjustably supported in an extension 34 of the bracket 15. A tool 37 for burnishing the edge of the workpiece is arranged to reciprocate along the edge thereof. As shown it is arranged to oscillate about a vertical stud 38, Fig. 6. A link 51 is connected by universal joints to the tool 37 and to the upper end of a pivoted arm 53, Fig. 1, which is connected at its lower end to a link 59 adapted to embrace an eccentric 61 secured to shaft 63 mounted on the frame 1. The shaft 63 is driven by an electric motor at a high speed, and the throw of the operative end of the burnishing-tool 37 is fairly small. The feed-roll 25 and tool 37 may be driven from the same motor, but in that case means are provided whereby either can be driven alone. The burnishing-tool 37 is secured to a bar 39 pivoted on the stud 38, and its operative face is provided with a horizontal, slightly tapered groove about one-sixteenth of an inch deep and of a width to suit the thickness of the workpiece. The pivot 38 is either fixed on a flat-faced portion 48 of the frame 1, or on a bracket adjustably secured to the frame and surrounding the shaft 3. The pivot 38 may be eccentrically formed to provide means for adjusting the burnishing-tool 37 due to wear of the latter. A plate 71, secured to the frame 1 or to the alternative bracket for the member 48, has its upper surface substantially level with the top of the feed-roll 25 and the bottom face of the groove in the tool 37. The end of the tool 37 swings in a recessed portion in the upper face of the plate 71, the margin of the workpiece as it is fed up to and past the tool being supported by the plate, so that the under face of the workpiece is not damaged by the edge of the feed-roll 25. A plate 75, Fig. 6, is secured behind the feed-roll 25 to the frame 1 or to the alternative bracket for the member 48, and is so arranged that after the leading edge of the workpiece has passed between the feed-roll 25 and the creasing-wheel 27, or loosely mounted collar, it is deflected slightly outwardly, and causes that part of the workpiece which is about to pass between the feed-roll and the creasing-wheel to be deflected inwardly towards the burnishing-tool 37. The tool 37 is heated by a gas jet from a pipe 77 secured to the bracket 15. Specification 22526/08, [Class 60], is referred to.