. Textile raw materials and their conversion into yarns : (the study of the raw materials and the technology of the spinning process) a text-book for textile, trade and higher technical schools, as also for self-instruction ; based upon the ordinary syllabus and curriculum of the Imperial and Royal Austrian weaving schools. bed later on. Two forms of self-feedingdevices, known as hopper feeders, from their hopper-like form,will now be dealt with. Fig. 39 represents one of these forms,wherein the cotton is simultaneously freed from dust and shortfibres, by means of separator drums, before passi
. Textile raw materials and their conversion into yarns : (the study of the raw materials and the technology of the spinning process) a text-book for textile, trade and higher technical schools, as also for self-instruction ; based upon the ordinary syllabus and curriculum of the Imperial and Royal Austrian weaving schools. bed later on. Two forms of self-feedingdevices, known as hopper feeders, from their hopper-like form,will now be dealt with. Fig. 39 represents one of these forms,wherein the cotton is simultaneously freed from dust and shortfibres, by means of separator drums, before passing on forfurther mechanical treatment. The cotton, introduced through the mouth, «, of the hopper,falls on to the lattice creeper, h, which feeds it to an elevatorband, c, furnished with pins, which seize and carry up a portion 128 TEXTILE RAW MATERIALS. of the cotton. Just above the top of this elevator is placeda rotary regulating roller, d, inside of which is a frame, e, fittedwith four arms, which carry bars extending the whole widthof the machine and studded with pins, /. The frame ismounted on the eccentric pulley, g, which, as it does notmove with the roller, d, imparts a reciprocating movementto the frame during the rotation of d. Consequently thepins alternately project through slot-holes in the roller, dy. Fig. 40.—Hopper Feeder, with Beaters (vertical section). and are withdrawn when the latter turns round further, thusstripping the excess of cotton from the elevator pins andthrowing it back into the hopper. As the pins in the regulatingroller always retreat, the side nearest the hopper is left smoothand no material can be carried away by the pins. The cotton carried onwards by the elevator comes underthe influence of the opening drum, g, which propels it againstthe separating drums, h, i, the coarser impurities falling through TEXTILE RAW MATERIALS. 129 the transverse grid, /c, and the finer impurities through thelongitudinal grid, /, the former on to the ground,
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttextile, bookyear1901
