Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . mass are separated from it. In this partially purifiedstate the material is taken to a carder, or large circular box containing a cylinder or drum coveredwith curved teeth. This runs at a speed of about 800 turns per minute, and shreds the gutta-perchainto small pieces, which fall into a vat of water placed below. The gum being porous floats on thesurface, and the impurities are precipitated. Another machine for this purpose is represented in Fig. 2231, which subjects the gutta-percha
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . mass are separated from it. In this partially purifiedstate the material is taken to a carder, or large circular box containing a cylinder or drum coveredwith curved teeth. This runs at a speed of about 800 turns per minute, and shreds the gutta-perchainto small pieces, which fall into a vat of water placed below. The gum being porous floats on thesurface, and the impurities are precipitated. Another machine for this purpose is represented in Fig. 2231, which subjects the gutta-percha toa very thorough working over. The crude gum is presented by the feeding rollers G[ to the action 76 GUTTA-PERCHA. of the first breaker F\ It is by the latter broken up into shreds or fragments, and considerablequantities of earthy and other extraneous matters arc beaten out of and disengaged from it, thewhole falling in a mingled mass into the water contained in the compartment f of the tank, where thedifferent materials assort themselves according to their specific gravities. Such pieces as consist of. 8829.
Size: 1294px × 1932px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
