Pa′per-cut′ting ma-chine′.
A machine for cutting paper in piles or in sheets, or for trimming the edges of books, pamphlets, etc.
Owing to the sizing and coloring matter, paper is a very difficult substance to cut, and requires a strong knife to pass through any considerable quantity.
The knife must also have a draw or shear cut, and requires frequent grinding.
One form of paper-cutter is a straight-edge and traveling knife.
Another has a revolving traveling knife sliding on a bar parallel with a stationary knife which acts as one blade of a shears.
Another form has a knife hinged at one end, which descends on a pile of paper with a shear cut. See card-cutter.
Sanborn's paper-cutter (
Fig. 3524) has a cast-
iron frame which sustains the horizontal bed
T′ upon which the paper to be cut is placed.
Working through vertical slots or guides, formed in the upper part of the frame just mentioned, is the knife-stock
Z, which carries the knife or cutter, the latter being detachable, so that when required it may be removed for sharpening.
The cutter-stock is suspended from a horizontal cross-piece at the top of the frame by means of two toggles or swinging-bars, which, when the cutter-stock is elevated, as shown in the engraving, occupy an inclined position.
The cutterstock is connected by a pitman with a crank arranged underneath the table, and rotated when the apparatus is in use by a belt-wheel operating through a suitable system of gearing, and arranged at one side of the frame; this belt-wheel being furthermore furnished with a suitable balance-wheel.
The table is made adjustable under the cutter by suitable appliances worked by a crank, and has a gage
t s r arranged at one edge and in suitable proximity thereto, so as to guide the attendant or operator in regulating the position of the mass of paper upon the table and in relation to the cutter.
The clamp for clamping the paper tightly in place upon the table, previous to and during the descent of the cutter, is operated by appropriate devices, to which movement is given by a hand-wheel
D′ arranged at the side of the upper portion of the frame.
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Paper-cutting machine. |
The mass of paper having been properly placed upon the table and underneath the cutter, as just above indicated, the driving-belt is shipped to turn the driving-pulley and rotate the crank
X which operates the cutter-stock.
As this latter is drawn longitudinally inward by the action of the pitman, the suspending bars or toggles are brought into a more or less vertical position, thus forcing the stock and its attached cutter downward, and consequently giving a compound downward and longitudinal motion to the same, which insures the gliding cut essential to the perfect working of a machine of this character.
As the crank completes its revolution the pitman is of course forced outward, thereby bringing the cutter-stock upward and outward to its original position, preparatory to a repetition of the cutting operation.
Soule's undercut machine has the knife below the bed, and the knife lifts with a shearing cut against a pile of paper held down on the bed by a clamp.
The portion of the bed or table outside the knife is attached to the knife-carrier in such manner as to yield sufficiently to receive the part of the paper cut off. The knife moves only far enough to cut through the paper, instead of passing through its whole stroke, as in guillotine machines.
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1621]
Semple's paper-cutter (
Fig. 3525) is used for trimming the folded edges of books and magazines after the sheets are stitched.
Two bundles of books are placed on platform
a with their backs to the standards
e c, and are held down by the screw
b. The platform is then drawn up the inclined track by the action of worm-gear
e, and the sheets are brought against the knife
d with a drawing cut. Platform
a is pivoted to carrier
f, and revolves to present the top, bottom, and sides of the books to the knife.
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Paper-cutting machine |
