Image from page 437 of "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 u
Title: 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
Publisher: London : Scott, Greenwood
Contributing Library: Claire T. Carney Library, University of Massachusetts Dartmouth
Digitizing Sponsor: Claire T. Carney Library, University of Massachusetts Dartmouth
View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.
Text Appearing Before Image:
Fig. 268.—Finisher Roving Frame (vertical section). principles as doubling and slubbing, but differs therefromin the manner of winding the product, and in the method ofbuilding the bobbin. 430 TEXTILE RAW MATERIALS. Thus, whereas hitherto the finished bobbins have hada cylindrical shape with crossed windings, the rove bobbinsare cylindrical with conical ends, and the coils are in lesssteeply pitched spirals. The difference in the manner ofwinding is, however, so slight that, as in the case of cotton,the whole of the drawing, slabbing and roving operationsmay be regarded as coming under the last-named category. Finisher Roving Frame (Fig. 268).—The slubbing bobbins,b, mounted in the creel, a, deliver the slubbings, c, over theguide rod, d, through the perforated plate, c, and trumpet, g,to the receiving rollers, //, /, whence they pass to the quicker In .a^U
Text Appearing After Image:
Fig. 269.— Finisher Roving Frame (plan). running draft rollers, k, I, which effect the desired attenuation,the slivers being guided by the rollers, ui, n, whilst the fibresare straightened and laid out parallel by means of the por-cupine roller, 0, which runs at a velocity intermediate betweenthat of the receiving and delivery rollers. The attenuatedribbons are then rounded and condensed in the doeskinrubbers, p, p^, each of which (see Fig. 269) deals a couple ofthem. The rove threads are afterwards twisted round thethread guides, r, pivoting at q, and led through a terminalloop thereon to the bobbins, s. The latter rest on flutedrollers, u, on the bobbin carriage which is moved laterally at TEXTILE RAW MATERIALS. 431 a rate enabling the thread to be coiled closely in each layer,the amplitude of motion being varied so as to form taperedends, as shown in Fig. 269. The loaded upper deliveryroller, /, is covered with felt and parchment paper, and iscleaned by the brush, te. (In the Eng
Note About Images
Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.