Patent GB-261841-A (GB)
Title: Improvements in apparatus for making wafer cones, cups, cornets and the like
IPC: A21B5/02
Filed: 1925-08-26
Abstract: 261,841. Baker Perkins, Ltd., Paterson, J. C., and Baker, G. R. Aug. 26, 1925. Wafer biscuits, making. - A machine for making wafer cups, cones and the like, in which the mould members, comprising two separable halves with an inserted core, are heated in a movable path, is characterized by the cores being removed with the cones thereon and by the mould halves being transferred, after withdrawal of the cores, to the commencement of the path to receive a fresh charge of batter and a cone. The half mould members are formed on each side of separate blocks, two of which are placed together to form a complete mould. As shown in Fig. 1, the blocks 4 are recessed to form the half mould members and are moved clockwise in a circular path which is interrupted at 7 to permit the transference of the upper block 4 from the position 9 at the end of the circuit, to the position 8 at the beginning of the circuit, the correspending row of cores 10 being turned through 180‹ by the engagement of a pinion 17 with a rack 20 to permit the stripping-off of the finished cones by means described below. The cores 10 are mounted on frames 11 slidable radially on guide rods 14 carried by the half mould blocks 4 and revoluble in bearings 16. The rollers 17<a> engage cam rails 18, disposed in the gap 7, which carry the cones over the position where the batter is supplied by a nozzle or pipe through the aperture 1<b> in the casing, the rails being inclined at 18a and curved at their lower ends to lower the cones into the moulds and to retard the final union. A tail-member 11<a> carried by each frame 11 engages a bracket 11<b> having an inclined face 11<c> which causes the cores slowly to approach the moulds. At the beginning of the baking- operation, the cones are pressed gently down. wards by a resilient adjustable cam plate 73 which acts on the rollers 17<a>. Rotary locking. bolts 93 having projections 96, 97 which engage with locking and unlocking stops are provided. The blocks 4 are carried on arms or spokes 5 freely revoluble on the shaft 6, and the transit of the blocks across the gap 7, and the consequent intermittent rotation of the whole series of blocks 4, is effected by oscillating arms 21 having spring-controlled pivoted trips 23 which engage pins 27 extending laterally from the blocks. The arms 21 oscillate freely on the shaft 6 and are operated by a cam 34, a lever 31 having a camroller 33 and associated with a spring 33a housed in a telescopic casing 33b, 33<c>, rod 30 and lever 29. The blocks 4 are held tightly together by the engagement of pinions 77, 87a with segmental racks 75a carried by the blocks and forming together an interrupted internally toothed crown wheel 75, the pinions 77, 87a being associated with mechanism as follows. The pinion 77 is secured to, and the pinion 76 is loose on, the shaft 78, Figs. 2, 5, and engage respectively the racks 75<a> and a spur wheel 79 loose on the shaft 6. On the pinion 76 is a flanged disc 80 on the hub of which a similar opposed disc 81 is positively arresting the clockwise movement of the moulds comprises a spring-returned bell crank lever 30b, 30<c>, Fig. 1, having a projecting portion which engages and releases pins 30d on the blocks 4, the lever 30<b>, 30<c> being rocked by the engagement of pawls 30a on links 30. The finished cones, x, Figs. 7, 8, are stripped from the cores 10 and nested by pivoted jaws 40, which are under the pressure of light springs 41, and are carried by a bar 57 on a sleeve 47 slidable on a guide rod 46, whereby the cones are removed from the cores and are pushed through tapered apertures 44 in an angle member 43 to remove roughnesses. Trip mechanism for opening and closing the jaws 40 comprises a plate 50 pivoted at 51 to the sleeve 47, pressed by a spring 53 and provided with two noses 48, 59, the former engaging a nose 49 on a sleeve 54 integral with an arm 55 which engages the tails 56 of the jaws 40. Sleeves 54 to actuate all the jaws 40 are provided on the shaft 54a, and two of the sleeves have projections 58 which engage an abutment 60 on the movement of the sleeve 47 to the left, Fig. 7. In operation, the cores 10 are positioned by the racks 20, the sleeve 47 is reciprocated by a cam 66 on the shaft 35 through a lever 68, link 69 and spring-return mechanism 70, loosely carried. Spaced lugs 82 project inwardly from the discs and are connected by a compression spring 83. The relative angular positions of the discs 80, 81 is adjusted by a turn-buckle 86 which is secured at one end to an arm fast on the shaft 78, and at the other end to a lug 85 on the disc 81. The shaft 78 is journaled at a point adjacent the filling-position. The clockwise rotation of the shaft 78 by the racks 75<a> tends to force the pinion 76, by the compression spring 83, still further in the clockwise direction which latter motion .is transmitted through the wheel 79 to a pinion 87 fast on a shaft 88 journaled at the end of the course of moulds. The shaft 88 is secured to the pinion 87<a> which meshes with the racks 75<a> whereby the moulds 4 between the shafts 78, 88 are subjected to a pressure which can be adjusted by the turnbuckle 86. The movement of the moulds is braked by the friction discs 89, on the shaft 88, and acted on by springs 91 adjustable by a cap 92. A safety-device for 71, 72, and, during the movement to the right, the nose 59 strikes the projections 62 and allows the noses 48, 49 to disengage under the action of a coil spring 65 on the shaft 54<a>, the consequent upward movements of the arms 55 allowing arms 40 to close and grip the cones x. On movement to the left, the projections 58 strike the abutment 60, the sleeves 54 rotate, depress the arms 55, open the jaws 40 and release the cones, the noses 48, 49 also being re-engaged. The nested cones are received in curved troughs 61 ready for removal. The casing 1 is packed with slagwool 2 and is provided with an inspection door 1<a> and a damper controlled uptake 1<d>. The heating may be effected by providing the mould elements with electric heating-elements receiving currents from contacts or brushes, or, as shown, burners 100, 106 may be provided obtaining gas respectively from a pipe 102 and from a compartment 105<a> in the shaft 6, divided from a compartment 105b by a rib 105. The compartment 105b may be filled with graphite or other suitable lubricant for the spokes 5 lubricating channels 105<c> being provided.