Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . osed simply of clay andcoloring matter, preparedin shape while plastic as above described, and subsequently boiled in stearine or wax. 282 LEATHER-WORKING MACHINERY. LEATHER-WORKING MACHINERY. A large number of special machines are used in thepreparation of leather, the majority supplanting hand-labor. One of the most important, as well asone of the first through which the hide passes, is . The Hide Mill.—This is a large wooden drum or cylinder about 8 ft. in diameter and 4 ft. inheigh
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . osed simply of clay andcoloring matter, preparedin shape while plastic as above described, and subsequently boiled in stearine or wax. 282 LEATHER-WORKING MACHINERY. LEATHER-WORKING MACHINERY. A large number of special machines are used in thepreparation of leather, the majority supplanting hand-labor. One of the most important, as well asone of the first through which the hide passes, is . The Hide Mill.—This is a large wooden drum or cylinder about 8 ft. in diameter and 4 ft. inheight, water-tight, and having large wooden pins projecting radially from the interior concave sur-face toward its horizontal shaft. Near one end of the drum, and exterior to it, is a small ironpinion, whose shaft is parallel to the shaft of the cylinder, which engages the cogs upon the circum-ference of the drum, causing it to revolve from 8 to 20times per minute. The pinion-shaft is put in motionby a licit connected with shafting. The mill is used forstuffing light leather and for various other 00 o 01 ::. I : \L. After stoning, skiving, and shaving, the sides are quite hard, and are put in the mill with some tan liquor toBoften them and to make them porous. In stuffing, acharge of about 20 sides, more or less, is put into themill, with the proper amount of dubbing, and it is thenset in motion for 15 or 20 minutes, when the milling softening leather, instead of the device above described, a mill of the form shown in section inFig. 2755 and in plan in Fig. 2756 is often used. It consists of a strong wooden box, with curvedbottom and ends, as shown. An opening is provided at the centre for the escape of the surpluswater. The hides are worked by two plungers or hammers, which are reciprocated by the doublecrank shown. A mill of this form, of ordinary capacity, softens about 100,000 hides yearly. Fleshing Machines.—Fig. 2757 represents an i
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Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
