A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . nto two by hand with a large knife, the width of the webbeing regulated by the deckle straps q, to cither twice or three times the width of thesheet, as the case might be. However, in regard to the length, considerable waste, ofnecessity, arose, from the great increase in the circumference of the reel as the paper waswound upon it, and to remedy this, several contrivances have been invented. To dwellupon their various peculiarities or separate stages of improvem
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . nto two by hand with a large knife, the width of the webbeing regulated by the deckle straps q, to cither twice or three times the width of thesheet, as the case might be. However, in regard to the length, considerable waste, ofnecessity, arose, from the great increase in the circumference of the reel as the paper waswound upon it, and to remedy this, several contrivances have been invented. To dwellupon their various peculiarities or separate stages of improvement, would prove of littlecomparative interest to the general reader; it will, therefore, be well to limit attention tothe cutting machine, of which an illustration is given, which is unquestionably the best, aswell as the most ingenious, invention of the kind. The first movement or operation peculiar to this machine is that of cutting the web ofpaper longitudinally, into such widths as may be required; and this is effected by meansof circular blades, placed at stated distances, wliich receive the paper as it issues direct from. the other machinery, and by a very swift motion, much greater than that at which thepaper travels, slit it up with unerring precision wherever they may be fixed. A pair of those circular blades is shown in the drawing a, the upper one being muchlarger than the lower, which is essential to the smoothness of the cut. And not only is theupper blade larger in circumference, but it is also made to revolve with much greaterrapidity, by means of employing a small pinion, worked by one at least twice itsdiameter,which is fixed upon the same shaft as the lower blade, to which the motive po^er is action aimed at i^ precisely such as we obtain from a pair of scissors. The web, as it is termed by the paper-maker, being thus severed longitudinally, the nextoperation is that of cutting it off into .sheets of some particular length horizontally: and todo t
Size: 1995px × 1252px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
