. Journal. 1891) it is possible to let the dye bath circulate from theoutside to the inside of the cops or vice versd. With regard to the construction of this machine it willbe noticed that it contains no moving parts whatever andespecially none that would move in contact with the dye-liquor. The importance of this advantage, as comparedwith the arrangements in Graemigers, Masons, andWhiteheads and Mommers machine cannot be this total absence of moving parts the wear and tear ofthe machine, and consequently repairs of it are reduced toinsignificance. The machine further allows a c
. Journal. 1891) it is possible to let the dye bath circulate from theoutside to the inside of the cops or vice versd. With regard to the construction of this machine it willbe noticed that it contains no moving parts whatever andespecially none that would move in contact with the dye-liquor. The importance of this advantage, as comparedwith the arrangements in Graemigers, Masons, andWhiteheads and Mommers machine cannot be this total absence of moving parts the wear and tear ofthe machine, and consequently repairs of it are reduced toinsignificance. The machine further allows a continuouscontrol of the actual amount of circulation of dye-liquorthrough the cops, wdiich in a high degree assists inobtaining identical shades in consecutive operations. Themachine works with a vacuum of from 12 to 15 pounds,and it will be easily understood, that this will induce amost energetic eireuHtion, which as a matter of tactamounts to nearly a gallon of dye-liquor per cop, and per Fig. 9. Fig. Dec. si. 1892.] THE JOUKNAL OF THE SOCIETY OF CHEMICAL INDUSTBT. 981 minute. In the presence of such an energetic circulationthe existence of hard and soft places in the cops is nolonger able to exert any influence upon the evenness ofdyeing, so that this difficulty has uo practical existence inthis machine. The capacity of this machine with regard tothe output of dyed cops i- considerably less than inObermaiers and Mommers machines, and about the saun-as in Graemigers maehiue, hut in its rational construction,universal applicability to all dyeing processes, safety andsimplicity of working, Crippin and Youngs machine standsfar ahead of all others. In A. and M. Koblenzers machine (Ger. Pat. 55,787,March 26, 1890) the cops arc fixed upon a sort of filter-pl iteslih which are then placed in the chamber or cylinder aI Fig. HI). The cops are then first treated with steam, bymeans of the perforated steam coil d and subsequently thedye-bath contained in the reservoir e is forced i
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
