Elementary treatise on the finishing of white, dyed, and printed cotton goods . Fig. 71. Calendering with endless blanket simple passage. same machine, the same labour, the same powertwo pieces can be passed and finished instead ofone. This arrangement was already in vogue in1828 at Witz Blectis works in Cernay and receiveda favorable notice from La Societe Industrielle deMulhouse (1829 see also Persoz, Traite de limpressiondes tissus. Vol. 4, page 514). Under ordinary conditions, if it is desired togive a light pressure with the 3 bowl calender^ 222 FINISHING IN GENERAL. a simple passage betw
Elementary treatise on the finishing of white, dyed, and printed cotton goods . Fig. 71. Calendering with endless blanket simple passage. same machine, the same labour, the same powertwo pieces can be passed and finished instead ofone. This arrangement was already in vogue in1828 at Witz Blectis works in Cernay and receiveda favorable notice from La Societe Industrielle deMulhouse (1829 see also Persoz, Traite de limpressiondes tissus. Vol. 4, page 514). Under ordinary conditions, if it is desired togive a light pressure with the 3 bowl calender^ 222 FINISHING IN GENERAL. a simple passage between 2 bowls is employedand the pressure between the 2nd and 3rd bowl isnot used. See fig. 73, p. 223. If the movement of the machine be reversedby crossing the strap, two pieces instead of onecan be simultaneously passed by simple alterationof the letting in scrimping bars and batchingapparatus, this will be readily understood bya reference to fig. 74, p. Fig. 72. Calandering with endless blanket, double passage. On page 225 a series of diagrams are givenshewing the various methods of passing goodsthrough calenders. They can be considerably modified:of course by heating the metal bowls; more orless damping; by varying pressure or lever weights,by the speed, by the composition of the finishingmixture and finally by the various operations thegoods undergo before or after the calendering; as»Breaking*, Beetling, Mangling etc. This simpleenumeration suffices to shew how numerous are MACHINES EMPLOYED IN FINISHING. 223 the various finishes that can be obtained. Takea 6 bowl calender for instance, the first cylinder-of which, starting at the bottom, and the fifth areof metal and which can be heated, the secondthird, fourth and sixth of paper and of largerdiameter than the metal ones. We will suppose, for it is not the case ina 6 bowl calender where the pressure is generallygiven from the top, that the top or bottom bowl
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