GB519869A - A method for the production of uniform milling products - Google Patents

Abstract

519,869. Roller mills. GEHLE, H. Oct. 4, 1938, No. 3915/37. [Class 59] [Also in Group I] In the manufacture of flour from grain the temperature or the humidity of the grain or milled products at any stage in the milling process is automatically varied in accordance with a measurable physical characteristic of the milled products during or after said milling stage. Alternatively, the temperature or humidity of the milled products during or after any stage in the milling process is automatically varied in accordance with a measureable physical characteristic of the grain when ready for milling. Thus the temperature of the grinding elements of a grinding-mill may be varied automatically according to the temperature of the grain or the milled products as these pass to or leave the mill; or the temperature or humidity of grain or of milled products during one of the milling steps may be automatically varied in accordance with the density of the milled products ; or the temperature or humidity of the grain passing to the milling devices may be automatically varied in accordance with the hardness of the semolina produced. As shown in Fig. 1, a thermometer 2 in the feed hopper of a roller mill is connected to a control device 4 for a valve 5 on a pipe 6 admitting cooling water to the rolls 7. Fig. 3 shows a device for influencing the humidity of the ground products after grinding. The ground material, introduced at 22, is conducted in a zig-zag path over sieves in a sifter 21 and discharged at 23. A thermometer 24 in the sifter is connected to a control device 26 for a valve 27 on a steam pipe 29 so that air, which is to be introduced into the sifter from a container 28, is moistened to a greater or less extent by the steam allowed to pass into the container ; the moistened air escapes from the sifter through pipes 31.