Patent GB-472428-A (GB)
Title: A machine for the automatic shaping and delivery of ice-cream, particularly for wafer sandwiches
IPC: A23G9/28
Filed: 1936-05-22
Abstract: 472,428. Ice-cream sandwiches. HIRSCHSON, R. May 22, 193G, Nos. 14557 and 14558. Convention dates, May 22, 1935 and March 31, 1936. [Class 28 (i)] A machine for making ice - cream wafer sandwiches, comprises a rotary ice-cream pot 2 from which the ice-cream is removed by a knife 8 inclined to the surface of the ice-cream and mounted in a non-rotatable circular plate 5 resting thereon. The plate 5 is vertically displaceable and is secured to an upper base plate 7 whereon driving mechanism is mounted. The icecream is taken up by the knife and fed through a cavity 10 to a mould 12 in a chamber 11. The mould is raised from the pot and wafers are fed forward to the ice-cream to form a sandwich which is removed from the mould. The pot 2 is rotated by a shaft 3 periodically operated by bevels 41, 42 and gears 29, 39 from the shaft of a crank handle 28. Each time the pot stops rotating, the chamber 11 is closed by a slide 13 and the mould is raised by a connecting rod 18 and crank 19 operated in synchronism by maltese gears 48, 49, shafts 47, 44 and bevels 43, 31 from the shaft of the handle 28. The mould 12 is raised into a cavity 21 in the upper plate 7 where a wafer 23, Fig. 5, is fed beneath the mould from a magazine 20a, by a pusher 22 and the ice-cream block 25, the lower wafer 23, and an upper wafer 26 fed from a magazine 20b are fed to a delivery table by an ejector 24. The pusher 22 and ejector 24 are operated by levers engaging cam grooves in a cam disc 52 operated at intervals through maltese gears 50, 51 from the shaft 44. The mould 12 is of U-shape, being open at one side and two ends. The shafts 3, 44 are alternately operated by a clutch sleeve 30 keyed to the crank handle shaft and adapted to engage the bevel 31 or the gear 29, Fig. 2a. The clutch sleeve is moved by an arm 38 on a sliding bush 37 moved by a pin 36 engaging a spiral groove 32 in a bush 33 rotated by gearing 34, 35 from the crank-handle shaft. A bell-crank lever 55 is provided to disengage the gears 34, 35 and fix the sleeve 30 clutching the gear 29. The pot 2 can thus be continuously rotated for making the ice-cream. A lug 56 is provided to engage the gear 35 and set it correctly for re-starting. A radial vane may be provided to sweep the ice-cream to the knife 8 or the knife may be reciprocated in the direction of its cutting edge. In a modification, the plate 5 is able to rise and fall in the pot 2 independently of the gear and plate 7 so that the wafer is always ejected at the same level. The stroke of the mould is altered by forming its lifting levers with a pin-and-slot connection having a spring pawl to ensure lowering. Adjustable stirring rods may be mounted on the plate 7. The crank 28 may be adapted for coin-operation. A locking device for the mechanism may be controlled by a thermostat. In another modification, the knife is set below the plate 5 so that excess ice-cream can pass between it and the plate. The icecream is led to a cavity from which it is fed by a piston into the mould. The piston and a slide-door for the mould are operated by geared and cam sectors rotated by the shaft 3.