US59042A - Improved apparatus for making paper-pulp - Google Patents

Description

UNITED STATES PATENTOFFI'GE.

\ .HENRY MARX AND FRITZ .MARX, OF BALTIMORE, MARYLAND.

IMPRovi-:D-APVPARATUS FOR MAK|NG PAPER-PULP.

Specification forming part of Letters Patent No. 59,042, dated October 23, 1866.

To all whom it may concern:

' Be it known that we, HENRY MARX and FRITZ MARX, of the city and county of Baltimore and State of Maryland, have made a new and useful Improvement in Machines for Making Paper-Pulp from Wood; and we do hereby declare the following to be a full, clear, and exact description of the nature, construction, and voperation of the same, sufficient to enable one skilled in the art to which our invention is allied to construct and use the same, reference being had to the accompanyin gdrawin gs, which are made partot' this specication, and in which- Plate l is a side elevation. Plate 2 is a vertical longitudinal section through A B, Plate 4. Plate 3 is an end elevation. Plate 4 is a plan or top view. Plate 5 is a plan or top view of the sieves. Plate 6 has side and end elevations of the sieves.

In this machine blocks of wood are exposed to the grinding` action of a stone with a surface marked with channels, grooves, or indentations, the wood being disposed with its grain parallel to the axis of the stone, while a stream of clear water is pou-red upon it. The wood is contained within boxes around the periphery of the stone, and is fed thereto by followers, which are subjected to an even pressure7 not derived from the motor or consequent upon the rate of motion of the stone, bul capable of graduation, and recognizing the differences of density and tenacity of different woodsl or of different portions of the same block. The pulp Vis received upon and sorted by shaking inclined sieves, which deliver the different qualities at different levels from the same vertical tier, to be conducted to different receptacles.

In the drawings, A is the frame of the machine, in which the grindstone B revolves in a vertical plane upon the shaft b. The boxes D D are open at their ends toward the stone,

and form receptacles for the wood, which is exposed to the action of the revolving` stone as it is fed thereto by the followers or pistons X X, which are operated by the rack E, gearing F G, and wheel H, the latter heilig attached to a band, I, Plate I, which passes over a pulley, J, communicating with a weight, K, which acts as a power to revolve the wheel H, and thus move the follower in its box and thrust the block against the stone. The pawl a and the ratchet-wheel c prevent the return of the follower, while the weight exerts a constant and even pressure, which may be increasedor diminished according to the character, variety, or condition or quantity of the wood under treatment, or the sharpness, con-v dition, or quality of the stones.

The stones may be of such dimensions as is safe and convenient. `We have used them about thirty-four inches in diameter. rIhe width of face determines the length of the blocks to be operated on.

When the block of wood is nearly worn out, and it becomes necessary to supply a fresh block, the pawl a is lifted from its engagement with the ratchet-*wheel and the band turned back by hand, which withdraws the follower and permits the deposition of another block in the box D.

The boxes D D are substantially similar, excepting in the feed-apertures. The upper box is fed through the opening guarded by the door L on the top, while the interior of the lower box is reached through the door N in the side, Plate l.

The pipe P furnishes water to the various parts of the machine, it being used profusely during the operation of grinding and conveying the pulp to the vats, being afterward removed by filtration or decanting, so that the pulp may be conveniently handled and placed in the press, where the major part of the water is removed by mechanical pressure.

. The water is turned on in the required quantity at the various points by the stop-cocks, suitably placed.

White pine, poplar, or other white, soft wood is preferred, and the resulting pulp, which runs from the grinder in a milky mass, is suitable for making into paper either alone or in combination with rag-pulp, the mode of presentation of the blocks preserving the continuity of the fiber more thoroughly than if it were presented in other position.

The ground mass runs with the water into the, channel G, from whence it is delivered onto the upper sieve-surface, S, which is made of more open meshes than the succeeding sieve, and arrests chips or fibers not suitable for pulp, which are ejected by the channel C yC out of the machine. The pulpitinds its way lonto the second sieve surface, S', where the finer particles run through and are discharged at the channels O O O, while the coarser portion reaches the board R and is discharged into the trough M for conveyance to the vats, as formerly described.

The shoe, which contains the sieves S S and the discharging-boards C C and R, is supported upon pivoted legs or links T T, and receives a longitudinal shaking motion from an eccentric or crank on the shaft U, which is driven by a band on the drum Y, or in any other suitable manner, being attached by a connecting-rod, V, to the bar W of the shoe.

It is advisable, to facilitate the motion of the pulp, to give an inclination as well as a longitudinal shaking motion to the shoe containing the sieves, and this facilitates the passage of water through the meshes, as well as expediting the downward motion of the pulp toward its place of discharge, for conveyance to the vats, which are furnished with upright cleats on their inner surface, and a lining of fabric, which permits the water to percolate through and the mass to gradually assume sufcient consisteneefor handling and pressing.

Having described our invention, what we elairn therein as new, and desire to secure by Letters Patent, is-

l. The arrangement of the millstone B, the boxes D, followers X, and feed-facing, opel ated by rack and pinion, band-wheel, and weight, substantially as described.

2. The arrangement of the longitudinallyshaking shoe, provided with inclined sieves in vertical series, with `separate'points of discharge, substantially as described.

3. The corrugated or rough-surfaced grindsteile, in the relation and capacity described.

" HENRY MARX FRITZ MARX. Witnesses:

E. D. M. FAEHTZ, Gunn. WoLFE.

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