Patent GB-331489-A (GB)
Title: Improved process of and apparatus for expressing material, for instance, of the consistency of dough or pasty material
IPC: A21C11/16
Filed: 1929-03-28
Abstract: 331,489. Kremmling, O. March 28, 1929. Feeding; depositing-machines; extrusion machines. -In a machine for depositing measured quantities of dough or like material, which may be of a frothy or spongy consistency, the material is fed from a container into an expressing chamber 92, Fig. 9, by oppositely rotating rollers 3, 4 whereupon communication between the chamber 92 and the container is substantially closed, as by bringing the rollers together as shown in Fig. 2, and the container with the roller 4 and a scraper 33 is oscillated about the roller 3 with the scraper moving outside the expressing chamber, to express the measured quantity of dough through nozzles 78. The container 2 is freely pivoted on a shaft 5 and is closed at the bottom by the oppositely rotating smooth rollers 3, 4 connected by glaring, the larger roller 3 being secured to the shaft 5 and rotated by a ratchet wheel 6 engaged by pawls 7 on a bell-crank lever 9 rotatable on the shaft 5. The bell-crank lever is connected by a rod 11 to a block 13 adjustable in a guide 14 by a hand wheel 16 whereby the extent of rotation of the rollers may be adjusted. The guide 14 is secured to a spindle 17 on which is fixed another guide 18 oscillated by a rod 21 connected to the pin 22 of an adjustable crank disc 23 on a shaft 24 driven by gearing 25 - - 28 from an electric motor 29. An adjustable slide block 30 in the guide 18 is connected by a rod 31 with a pin 32 on the pivoted container 2. The roller 4 is movable towards and away from the roller 3, being mounted on a bridge 43 carrying meshing gear-wheels 44 connecting the gearwheels 45, 46 of the rollers 3, 4; levers 42, 40 connecting the bridge 43 with a rod 38 operated by a cam disc 36 on the shaft 24. In operation, when the roller 4 is in its lowest position and separated from the roller 3, the container 2 is turned upwards by the rod 31 and the material conveyed by the feed rollers 3, 4 into the expressing chamber 92. When the roller 4 has reached its highest position it is pressed by operation of the parts 36, 38, 40, 42, 46 against the roller 3 and the container is then turned down about the roller 3 expressing the material through the nozzle 78, the operation being then repeated. The scraper 33 for the roller 4 moves behind a tongue 35 of the casing 34. A roller 89 rotatable in one direction only on the ends of arms 90 rolls the material during the expressing movement and pushes the material into the inlet opening of the feed rollers during the upward movement of the container. The nozzle plate 76 may be given any desired movement by cam plates 81 controlling the nozzle plate by connecting rods 84. The chain or like conveyer for the sheet-metal plates receiving the expressed portions is moved by a connecting rod 55 pivoted to an adjustable block 54 in a guide 53 rotatable on a spindle 52 and oscillated by a connecting rod 49 driven by an adjustable crank disc 47 on the shaft 24. On the spindle 52 is mounted a further lever 56 which through a connecting rod 57 moves arms 58, 59 operating a cutting device in a guide 60. The guide 60 is vertically reciprocated by a rod 61 operated by a cam disc 63. For raising and lowering the table 64 a rod 72 operated by a cam disc 74 rocks a guide block 70 connected by an adjustable rod 67 having a spring 66 with a cross-piece 65 pivoted to the table. The rollers need not be brought into contact during the expressing movement, the degree of approach depending on the nature of the material, provided that flowing back of the material into the container is avoided. Coarse adjustment of the quantity expressed is effected by adjusting the crank discs, and fine adjustments during working by the adjustable guides 14, 18, 54. When the articles made comprise different materials two or more containers with expressing devices may be arranged one behind another, movement being derived from the first by connecting rods 93 - 95. To smooth the cut-off part the nozzle plate 76 may be returned rapidly in the direction in which it travelled for cutting. To obtain a droplike shape the table is pressed against the nozzles and lowered again at the beginning and end of the expressing. Fig. 6 shows a nozzle plate with two nozzles 96, 97 subdivided by wires or narrow partitions 99 into compartments 100, the dough &c. being divided during expressing but reuniting owing to the swelling of the dough. The reuniting may be assisted by making the partitions 99 with teeth. Flanges 108 on the roller 4 close the expressing chamber 92 laterally. The container 2 may readily be turned back so that the expressing chamber is uncovered for cleaning.