US242138A - X p peters - Google Patents

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G. D. KING; Machine for Preparing Wood for the Manufacture of Paper Pulp.

No. 242,138. Patented May 31, 1.88l. .7

N FITERS, FMIo-lflhomphun Washington, D. c,

2 t e e h 4 8 e e h 8 2 G N I K D G m d 0 .M 0 N Machine for -Prspari ngWood for the Manufacture of Paper Pulp.

No.242J 38.

Patented May 3|, I881.

N- PETERS, PhotoLlllwgrlw, Washinlbm D l UNITED STATES PATENT OFFICE.

GEORGE 1). KING, on os-WEeo, NEW YORK.

MACHINE FOR PREPARING WOOD FOR THE MANUFACTURE OF PAPER-PULP.

SPECIFICATION formingpart of Letters Patent No. 242,138, dated May 31, 1881.

Application filed July 21, 1880. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE D.KING, a citizen of the United States, residing at Oswego, in the county of Oswego and State of New York, have invented new and useful Improvements in Machines for Preparing Wood for its Manufacture into Paper-Pulp, of which the following is a specification.

My invention relates to machines for cutting wood into small pieces or chipping it preparatory to reducing it to pulp by grinding or by chemical means; and the object thereof is to provide a machine for the above-named purpose which will reduce the wood rapidly to pieces of uniform size.

I attain the above-named object by means of the devices and construction illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of my machine. Fig. 2 is a perspective view of the front of the cutter-wheel. Fig. 3 is a like view of the rear side of said wheel and showing its drivinggear. Fig. 4 is a view of the straiglit edged cutter, and Fig.5is a view of the toothed-edged cutter. Fig.6 shows the end of a stick of wood as it appears after having been acted upon by the toothed cutter-knife.

A A are portions of the frame of the machine, upon which are secured boxes b, in which a shaft, 0, runs.

Upon the end of shaft 0, projecting beyond the side of frame A, isfixed the geared cutterwheelB, which is driven by a gear, D, on the end of a shaft parallel to shaft 0, also running in frame A, and having on it the tight and loose pulleys a a and the balance-wheel c.

E is an inclined fced-trough bed attached to frame A, its lower end terminating near the front face of the cutter-wheel B.

Upon the rear face of the cutter-wheel are cast or otherwise provided two inclined cutterblocks, 6 e, and a rectangular openingis made through wheel 13, as shown, at the base of each of said blocks 6 6'. Upon the upper edge of each of the said blocks areformedproperbases for the reception of two screw-bolts, i i, and two or more bolts, 0 o, are fixed in the face of these blocks at right angles thereto.

The two cutters h h are made of suitable form to adapt them to be secured to wheel B in such a manner that their cutting=edges will project through openings in said wheel to a uniform distance beyond the face of it, and one of said cutters is slotted from its cutting-edge inward, forming a series of slots and cutters thereon of equal width, and the second cutter, h, is made with a straight cutting-edge. When in this position the upper edge of the knives is under the ends of the screwbolts i i, as seen in Fig. 3.

The movements of the parts of my machine will be readily understood by the drawings, power being applied by belt upon pulley aand through the shaft upon which it is fixed, and by gear D to the cutter-wheel B,the inner face of which revolves in close proximity to the end of the feed-trough bed E.

The cutters h h are adapted to have their cutting-edges project through wheel B, as seen in Fig. 2, standing at an angle to the plane of rotation of wheel B determined by the incline of the blocks 6 e, and while the nuts on bolts 0 are slightly turned back screw-bolts i are forced against the rear edge of the cutters to cause them to project through the openings in wheel B far enough to cut a chip of the requisite and uniform thickness from the end of a block presented to the face of said wheel,and the straight-edged cutter is set to outjust the depth of the grooves cut by the toothed cutter. Thus the toothed cutter cuts out its series of chips as it passes against the end of the block, grooving it, as shownin Fig. 6, and the straightedged cutter follows, cutting at the same depth, and takes on a like series of chips formed of the ribs 00, which are shaved off close to the end of the stick.

The machine having been adjusted and set in motion, blocks of wood are fed downward endwise in any suitable feed-trough located on bed E, and, as will be seen, the direction of the out of the knives is diagonally across its grain, as shown in Fig. 5, and the successive action of the tooth ed and straight-edged cutters upon the stick is as just described. It will be readily understood that the said direction of the cut relative to the grain of the wood will tend to open the grain of the chips so made, and thus facilitate disintegration by grinding and permit chemical solutions to more freely enter the pores of the wood and hasten disintegra tion by this means. The aforesaid successive action of said cutters produces chips from the stick ofuniform width and thickness,or if they Vary at all they will be simply narrower under certain circumstances when cut from the edge of the stick, and will not exceed the width and t thickness determined by the set of the cutters and the spread of the teeth on one of them.

The most economical and successful results in pulping wood are only reached when the wood, preparatory to grinding or reduction by chemical means,isreduced to chips of uniform width and thickness. This condition of the 3 wood adapts it to be ground between abrading-surfaces much more evenly than when chips of largely-varying dimensions are acted upon at the same time by the grinding-surfaces; and when wood chips of various dimensions are submitted to the action of chemical solutions for disintegrating purposes the tinest chips become pulped long before the larger 1 ones, and by the time the latter are disintegrated a large part of the pulp from the former ones is destroyed by the prolonged action of the caustic liquor necessary to reduce theth iel; l chips. l

3y reducing the wood to uniform width and thickness a caustic liquor of less strength may be employed and a larger yield of pulp be obtained.

What I claim as my invention is- 1. The combination, in a machine for preparing wood for the manufacture of paper-pulp, of an inclined feed-bed, of a cutter-wheel arranged to revolve at the end of said feed-bed in a plane at right angles thereto, and of two i cutters adjustably secured to said cutter-wheel to successively cut grooves in and shave OH to a uniform depth the surface of a piece of wood forced against said wheel, substantially as and for the purpose set forth.

2. The combination, with the inclined feedbcd I), of the cutter-wheel B and the cutters h and I1, adjnstably secured to said wheel, substantially as and for the purpose set forth.

GEORGE D. KING.

Witnesses:

JoIIN ll. MeCoLLoM, (1. II. Bv'rLnR.

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