. Appleton's dictionary of machines, mechanics, engine-work, and engineering. kinson obtained a patent in 1840 for a new mode of sizing paper continuously, in an air-tightvessel, (partly exhausted of air,) by unwinding a scroll of dried paper from a reel, and conducting itthrough heated size; then, after pressing out the superfluous size, winding the paper on to another reek A longitudinal section of the apparatus employed for this purpose is represented in Fig. 3006, wherea is the air-tight vessel; b, the reel upon 3006 which the paper to be sized is wound;whence it proceeds beneath the guide
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. kinson obtained a patent in 1840 for a new mode of sizing paper continuously, in an air-tightvessel, (partly exhausted of air,) by unwinding a scroll of dried paper from a reel, and conducting itthrough heated size; then, after pressing out the superfluous size, winding the paper on to another reek A longitudinal section of the apparatus employed for this purpose is represented in Fig. 3006, wherea is the air-tight vessel; b, the reel upon 3006 which the paper to be sized is wound;whence it proceeds beneath the guide-roller c, and through the warm size toanother guide-roller d. It thence as-cends between the press-rolls ef, (bywhose revolution the paper is drawnfrom the reel b,) and is wound upon thereel g. A float h is suspended from thecross-bar i of the vessel a, for the pur-pose of diminishing the surface of sizeexposed to evaporation; and beneaththe bottom of the vessel is an inclosedspace j, into which steam or hot wateris introduced for maintaining the tem-perature of the PAPER MACHINES. 459 PAPER MACHINES, regulation of. It is found in practice to be difficult to regulate the motion ofthe Foudrinier, and other machines, in common use, for the manufacture of endless paper. When theflow of pulp upon any machine is uniform, an acceleration of its motion will make the paper thin,whilst a retardation will make it thick. Hence it is of the utmost importance, in order to make paperof even weight and thickness, that when the flow of the pulp is uniform, the machine shall move uni-formly at the same speed. But if, by any contrivance, the flow of the pulp could be augmented, orchecked, just in the same proportion as the machine moves slower or faster, it is evident that thenecessary relation between its speed, and the quantity of pulp thrown on, might be effected and main-tained. Consequently, two modes of obtaining the requisite uniformity in the thickness and weight ofthe endless sh
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
