Patent GB-635786-A (GB)
Title: Improvements in or relating to machines for performing combined cutting and marking operations on boot and shoe parts and the like
IPC: C14B1/56
Filed: 1947-07-24
Abstract: 635,786. Ornamenting boot &c. parts. FREEMAN CO., L. G. July 24, 1947, No. 19951. Convention date, Dec. 30, 1940. [Class 17 (i)] [Also in Group XVI] A machine for marking and ornamenting skins, leather and parts of boots and shoes of the kind in which markings may be combined with the application of perforated or cut-out patterns, is constructed with heating arrangements which permit of the formation of marks with or without the application of pressure. In some cases the heating device causes a surface marking or ornamenting which may include the setting or ironing- in of a previous inked impression. The markings may be of a temporary nature such as are used to guide stitching operations, and embossing in gold or silver leaf may be effected. Improved methods of heating the marker are employed. As applied to a machine for applying combined cutting and marking operations on boot and shoe parts as described in Specification 527,069, [Group VIII], the work is placed on a support S, Fig. 4, and on operation of a treadle T, Fig. 1, a carriage C is moved over guide rails G to bring the die member 30, Figs. 2 and 4, over the support S and an impression is made by relative vertical movement between the support S and carriage C. Marking material may be applied to the die as it moves towards the support S. The die 30 is formed integral with or connected to a die member 25 which is yieldably connected by springs and screws to a plate 24 secured to a plate 19 by rigid posts 20 secured to a steel plate 19 connected to a mounting plate 16 on the carriage by a detachable dovetail connection 17. The plate 19 is fitted on its undersurface with a rubber blanket and an insulating blanket. The die is heated by an embedded coil 31 connected by leads 32 to a plug 33 engaging in a socket 41 which is supplied with electricity in all positions of the carriage C by means of sliding buss bars 40 which maintain contact with supply wires 39 in all positions of the carriage. A modified form of die member which is adapted to facilitate change of dies comprises a master die base comprising a base 51, Figs. 1 and 7, formed with a dovetail recess for receiving a corresponding projection on the member 54 formed with a die surface 57. The base 51 is connected by a dovetail connection to the carriage C, and each die is held in position on the base by a pivoted latch 58. The die is positioned on the base by means of a stop lug 60 which limits the position to which the dovetail projection 55 on plate 51 can be moved in its slot. In a modification the die is arranged to be heated when moved to its extreme rear position by a plate 63 connected to a source of constant heat. The plate 63 is supported by a pair of curved levers,67 mounted on a shaft 66 and a roller 70 carried by the plate 63 rests on a cam surface 71 which assists to control the position of the plate 63. A crankarm 68 can be held by a spring catch so as to move the plate 63 to operative or inoperative positions. In the position shown the plate is operative and is inclined downwards slightly so that as the die moves to its rear position it passes over the plate without contacting it. When however a projection 75 on the die engages an adjustable stop 76 on the plate 63, the plate is pivoted into contact with the die. Dies may be heated by means of an electric stand 80, Fig. 1, mounted above the marking apparatus, and when heated may be removed by insulated tools and secured in the machine.