Journal . ifferentmixings of rubber with which to build up their tyres, the inten-tion being to obtain a tough tread, a highly elastic tread base orcushion, and resilient though reasonably strong walls. Aspecial hard mixing is necessary for the headings. The ingre-dients used in the manufacture of inner tubes are, of course, verydifferent from those employed in the outer cover, the essentialpoint in the former being a high degree of elasticity. Crimsonantimony is employed to colour the popular red tube, and thoughit is maintained in some quarters that the latter presents nosuperiority over the
Journal . ifferentmixings of rubber with which to build up their tyres, the inten-tion being to obtain a tough tread, a highly elastic tread base orcushion, and resilient though reasonably strong walls. Aspecial hard mixing is necessary for the headings. The ingre-dients used in the manufacture of inner tubes are, of course, verydifferent from those employed in the outer cover, the essentialpoint in the former being a high degree of elasticity. Crimsonantimony is employed to colour the popular red tube, and thoughit is maintained in some quarters that the latter presents nosuperiority over the grey tube, the authors experience inclineshim to think that it has. The rubber, sulphur and other ingredients are mixed in a millnot in appearance unlike the ordinary household laundry mangle,but with hollow metal rolls, steam-heated or water-cooled at willin accordance with requirements (Fig. 2). The temperaturemaintained affects the consistency of the compound, and hence 62 THE MOTOR CAR PNEUMATIC pjg- i.—Rubber Masticator THE MOTOR CAR PNEUMATIC TYRE. 63
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Keywords: ., bookcentury1800, bookdecade186, bookpublisherlondon, bookyear1861
