Patent GB-191423010-A (GB)
Title: Improvements in or relating to Outsole Trimming Machines for Boots and Shoes.
Inventor: MELLERSH-JACKSON WILLIAM JOHN
IPC: A43D43/02
Filed: 1914-11-24
Granted: 1915-11-24
Abstract: 23,010. Jackson, W. J. Mellersh-, [Hamel Shoe Machinery Co.]. Nov. 24. Trimming; channelling. - In a rounding and channelling machine adapted to trim to either a Scotch or a Baltimore edge, the work is fed by hand, and manual means are provided operable simultaneously with the feeding operation to produce the Baltimore edge w h e n desired; the amount of Baltimore is automatically proportioned to the length of the edge to which it is applied. The shoe is positioned with its sole edge between a vertically movable guide 16, Fig. 1, adapted to engage the crease or upper, and a hammer 14 adapted to clamp the work yieldingly against the crease guide. This hammer is advanced by a fork-ended eccentric strap 18 simultaneously with a trimming-knife bar 21, Fig. 8, until the hammer is brought up by contact with the work, whereupon a spring 19 yields and the trimming-knife 11 continues its advance to cut through the sole edge against a fixed anvil 13, Fig. 1. The bar 21 carries on its underside a roller 24 adapted to engage a cam-slot 31, Fig. 6, in a plate 30 secured to the top of a holder 27, on which is pivoted a bar-25 adjustably carryi n g the channelling- knife 12, so that as the trimming-knife bar 21 moves forwards, the channel-knife bar 25 is caused to swing, and the knife 12 cuts a channel in the work. The forward end of the bar 25 normally rests on an adjustable stop 301, Fig. 1, in which position the channel is cut at some distance from the edge of the work at the shank; but when the forepart is reached, the operator depresses a treadle 66 connected to the rear of the bar 25 to raise the channel knife so that it operates nearer the edge of the work. The same treadle is also connected to a pressing- lever 64, which contacts at its front end with an adjustable pin 63 resting on a shaft 60 adapted to be tilted about flared bearings 62 in the machine frame. This shaft carries a cam 59 in engagement with a roller 58 projecting from the crease guide 16. When, therefore, the treadle 66 is depressed, the pressing- lever 64, through the connexions described, causes the cam 59 to be lowered bodily to move the crease guide downwards against the pressure of a spring 52. This results in the shoe being trimmed to a Scotch edge, the width of which is controlled by the provision of an adjustable stop-collar 80 on the pin 63. When it is desired to trim the shoe with a Baltimore edge, the cam 59 is also rotated, causing a further depression of the crease guide 16. For this purpose, the shaft 60 carries a pulley 69 round which is wound a chain 70 or other flexible connexion, the ends 701, 702 of which pass over an adjustable guide-pulley 72, Fig. 5, through a partitioned hole 74 in the front end of the channel-knife bar 25, and have secured to them roughened finger-grips 75, 76, marked respectively L and R to indicate which is to be used for left and right shoes. The hole 74 has its edges flared, and the grips are shaped so that when they are in engagement with the hole, they are held parallel with the sole. Assuming that a right shoe is to be trimmed to a Baltimore edge, when the toe is reached, the operator pushes the grip marked R, then in engagement with the hole 74, against the sole, and as he moves the shoe to the left, Fig. 5, past the trimming-knife, the flexible connexion is drawn through the hole, and the shaft 60 is driven to rotate the cam 59; the amount of rotation, and consequently the width of the Baltimore, depends upon the amount of chain drawn out, and is therefore proportional to the length of the sole edge. To assist in guiding the work, and also to prevent the shoe from being fed forward so fast that the trimming-knife will skip, a feed stop and guide 15, Figs. 1 and 5, adjustably secured to the machine frame is provided; this stop is formed with an horizontal finger, conveniently oval in cross-section, which engages the underside of the trimmings, and also, preferably, the trimmed edge of the sole. In a modified construction, Fig. 9. the feed stop and guide is a movable member 111 controlled by treadles 112, 113 and springs 118 119; this stop may be moved to produce the Baltimore without any movement of the crease guide 16.