. 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. ort the fibres and keep them together. 2. To bring about and maintain the parallelism of thefibres. 3. To make the individual fibres finer by subdividingthem. 4. To remove small adherent impurities (shives). Each of the fibres grasped by the draft rollers is drawnout, whils
. 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. ort the fibres and keep them together. 2. To bring about and maintain the parallelism of thefibres. 3. To make the individual fibres finer by subdividingthem. 4. To remove small adherent impurities (shives). Each of the fibres grasped by the draft rollers is drawnout, whilst the remainder composing the tress are still retainedby the gills, the result being to attenuate and straighten themout in parallel order. This is the principle underlying theconstruction of all existing machines for drawing flax. The first mechanical appliance to be mentioned in thisconnection is : — The Gilling Machine. This is shown, as a vertical section and plan view, in , 140. The hackled flax is laid, in the form of tresses, on TEXTILE RAW MATERIALS. 247 one of the four spread-boards, a, of the machine, so that thepointed ends of the bundles overlap properly, and the fibres—pressed together by the guide cheeks, b—are delivered tothe rear or feed rollers, c, d, as crude slivers about four inches. Fig. 139.—Gilling Machine for Flax (vertical longitudinal section). broad. The lower feed rollers alone are driven, the upper setbeing heavily weighted and moving slowly by friction. Be-tween them they seize the sliver and convey it to the gills, e,consisting of about fifty-two metal bars or fallers, / (see alsoFig. 141), which, at four places, each extending for a length of
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttextile, bookyear1901
