US1156373A

US1156373A - Machine for shredding paper-stock.

Info

Publication number: US1156373A
Application number: US2148915A
Authority: US
Inventors: George D Ryther
Original assignee: Ryther & Pringle Co
Current assignee: Ryther & Pringle Co
Priority date: 1915-04-15
Filing date: 1915-04-15
Publication date: 1915-10-12
Anticipated expiration: 1932-10-12

Description

G. D. RYTHER.

MACHINE FOR SHREDDING PAPER STOCK.

APPLICATION FILED APR. 15. 1915.

Patented Oct. 12, 1915.

2 SHEETSSHEET I.

. J, y D QVi blame): I v I 5 \72 7 g/ y nvewtw G. D. RYTHER.

MACHINE FOR SHREDDING PAPER STOCK.

APPLICATION FILED APR. 15. I915.

1,156,373.. Patented 001. 12, 1915.

2 SHEETSSHEET 2.

Q/Vihwmeo: Sum 11 I'oz UNMED snares rarnnr ora ion.

GEORGE D. RYTHER, 0F CARTHAGE, NEW YORK, ASSIGNOR TO RYTHER & PRINGLE (70., OF CARTHAGE, NEW YORK, A CORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented Oct. 12, 1915.

Application filed April 15, 1915. Serial N 0. 21,489.

To all whom it may concern:

Be it known that I, Gnonon D. RYTHER, a. citizen of the United States, and resident of Carthage, in the county of Jefferson and State of New York, have invented certain new and useful Improvements in Machines for Shredding Paper-Stock, of which the following is a full, clear, and exact specification, reference being had to the accompanying drawing, in which- Figure l is a plan view; Figs. 2 and l are side elevations of my improved shredding machine, and Fig. 3 a sectional view on line 33 indicated in Fig. 1.. 15 I My invention relates to the art of papermaking, more particularly to machines for preparing dry paper stock for the beaters,

and it consists of the hereinafter specified improvements in the construction of such machines, whereby a more complete disintegration of the paper stock is effected, interruptions in the working of the machine prevented, and its productive capacity in creased, without requiring a corresponding increase in the power for driving the machine. v

The paper stock shredding machine. constructed according to my invention, in the form illustrated in the accompanying drawings. consists essentially of a suitable frame. like the frame 4 shown in the drawings. whereon the operating parts are mounted. a stationary knife, mounted like the knife 8. in the frame in position to co-act with the series of rotary knives. or saws, 9, mounted on the shaft 11. and which are co-acting with the knife 8, and with the feeding mechanism. to effect the disintegrating of the paper stock into coarse particles: a series of stationary shredding blades, set underneath the stationary knife 8, and in cooperative position with the rotary shredding knives. or saws. 9, whereby the coarse pieces of paper stock. produced by the co-aetion of the stationary knife 8 with the rotary knives, or saws. 9, and of suitable means for positively feeding the paper stock, are further disintegrated into finer particles (fibers).

The frame 4 of the machine is designed to support the several cooperating parts of the machine, and the shafts. rolls and gears, in their required position: the'stationary knife 3 is fixed in the rear of the frame 4. its cutting edge projecting into the path of the rotary knives, or saws, 9, so the paper stock is subjected to the cutting and shearing coaction of these implements. as it is moved by thefeeding mechanism. The rotary knives, or saws, 9, are mounted on the shaft 11. pillowed in suitable airings +1,.'aflixed to the frame 4, and driven by a belt (not shown) passed over pulley 12 fixed thereon. lhey are set at an angle, deviating more or less from right angle to the axis of the shaft 11, whereby a corresponding lateral motion of their teeth is produced when the shaft 11 is rotated. The knives, or saws, 9, are spaced by correspondingly shaped and dimensioned washers 11, whereby they are fixed in their position on the shaft 11. By means of these washers 11", the angular deviation of the rotary knives, or saws, 9,'from the axis of the shaft- 11, maybe varied, to conform to the requirement of the material worked upon in the machine.

In the rear end of the frame 4. and underneath the stationary knife 8, a bedplate 14 is formed. concaved to correspond approximately to the periphery of the rotary knives, or saws, 9. and the serrated, stationary. knife blades 10 are fixed therein with their teeth projecting into the spaces between the rotary knives, or saws, 9. The stationary knife blades 10 are arranged parallel to each other. and spaced apart, the distance between them being determined by the extent of the lateral deviation of the rotary motion of the tcethed knives, or saws, 9, co-acting with the serrated blades '10 upon the material to be shredded. and the required degree of its disintegration.

Owing to'the above-described position of the rotary knives. or saws, 9, relatively to the axis of the shaft 11, the points of these knives. or saws. move, to a greater or less extent. transversely between the points of the stationary. knife-blades 10. which are set parallel to each other. and at right angle to the shaft 11. Thereby the teeth of the r0- tary knives, or saws, 9. move at a more or less acute angle to the stationary knife blades 10, and the particles of the materialthe paper stock-are acted upon, so to say,

in two directions: along and across, between the serrated stationary knife-blades 10, and are thus cut. and simultaneously drawn, or torn apart by the co-action of the rotating, and simultaneously laterally moving, teeth of the knives 9. and with the teeth of the stationary knives 10. The cooperation of these shredding implements effects a very line disintegration of the paper stock.

For conveying the materialpaper sto -kto be shredded, through the machine, a (-onveyer and a set of feed rolls are provided. The conveyer comprises the endless apron 32, stretched over the platform 5, and over the

rolls

30 and 31. The bearings of the roll 30 are fixed; the bearings 43 of the roll 31 are movably mounted in suitable guide-ways on the forward extension of the frame 4. Two adjusting screws 42, one for each bearing, are suitably connected thereto and passed through bores in the flanges 44; correspondingly screw-threaded handwheels 34 are set on the projecting ends of the screws 42, so that by turning the handwheels 34, the bearings 43 are shifted to stretch. or relax, the endless apron 32 over the rolls. A gear wheel 18. meshing with the gear -whee1'19, to be described further on, is keyed to the shaft of the roll 30 to propel the endless apron 32 in the direction, indicated by an arrow, whereby the materialpaper stockdeposited thereon, is conveyed to, and within reach of, the feed rolls 6 and 7.

It should be noted, that the cooperative arrangement of the conveyer and the positively driven feed rolls, positively driven independently of the conveyer, as described farther on, also dispenses with the necessity of providing, what is known in the art as a doctor blade, the. function whereof is to remove from the conveyer accumulations of dust and broken up particles of the material, in that it prevents the accumulations. This prevention also avoids all crowding, stretching and wear of the endless apron, and secures a constant and uniform conveying of the material to the feed rolls.

The lower feed roll 6 is set on a level with the roll 30; it is preferably made of the same, or very slightly larger, diameter, and for driving it, at the same proportionate rate of speed, a gear wheel 24 is keyed to the shaft of the roll 30, the gear wheel engaging with the gear wheel 23, which, in turn, meshes with the gear wheel 29, mounted on the feed roll 6. By this gear, this feed roll 6 is driven at a speed corresponding. to the speed of the endless apron.

The upper feedroll is mounted in bearings adjustably set in the end of arms 46, pivoted on studs 26, and is driven from the shaft 17. The sprocket wheel 27, mounted on this shaft, is connected by chain 48 with the sprocket wheel 21, mounted on the stud 26; sprocket wheel 20, which is made integral with the hub of the sprocket wheel 21, is connected by chain 47 with the sprocket wheel 22, fixed to the shaft of the feed roll 6 7. The

sprocket wheels

27, 21, 20 and 22 are proportioned to propel the feed roll at the same relative. speed. or surface velocity, as the feed roll (3 is rotated.

The positive driving of the feed rolls 6 and 7 is provided to remedy the disturbing difficulty, heretofore encountered in ma chines of this kind, resulting from the buckling and jamming of the material under the action of the shredding implements, and to insure a steady and uniform working of the shredding devices of the machine. By the positive driving of the feed rolls, a constant and a uniform cooperation of the conveying and feeding means of the machine with the shredding implements is obtained. By this arrangement the material conveyed to the feed rolls 6 and 7 by the endless apron 32, is fed to the shredding mechanism constantly and uniformly. and is also held firmly in position against the repelling tendency of the action of the rotary shredding knives, or saw-blades. 9, whereby the frequently recurring interruptions in the operation of machines not constructed according to my invention are avoided. The advantage thus obtained is further augmented by utilizingthe weight of the roll 7 for keeping the materialpaper stockin close contact with, or so to say, compressed between, the feed rolls 6 and 7. whereby it is also held against the tendency of the rotary shredding knives, or saws, 9, to repel (push back) the material from the edge of the stationary knife 8, and thus cause interruptions of the working of the machine. and eventual breaking of its parts. For this purpose, this feed-roll 7 is journaled, as explained, in bearings, mounted on the ends of the arms 46, whose other ends are, pivoted on the studs 26, and mechanism for lifting it is provided, to facilitate the introduction of the material between the feed rolls, and to avoid interruptions in the workQwhen. as it sometimes happens, overlapping sheets are passed theretlrrough; also to permit speedy rearrangement of the parts of the material, as may at times be necessary.

The mechanism for lifting the feed roll 7 comprises the tread lever 51. fixed to the rock shaft 52, levers 54. also fixed to the rock shaft 52 in position directly underneath the arms 46. and rods 53, pivoted to the free ends of these levers 54. and whose other ends are suitably connected to the arms 46, so that by depressing the tread lever 51. the roll 7 is raised.

The highly advantageous results of the described arrangement. and of the positively driving the feed rolls, and in unison with the conveyer as described. are not obtainable in the stock shredding machines known in prior art, and the frequent interruptions in their operation. from jamming of'the material and breaking of their operating parts, prevented their coming mto more extensive lse. in paper making. The described improvements produce a constantly uniform feeding of the material, maintain it firmly in position, and thus insure the proper working of the machine, avoiding the frequently occuring interruptions in operating .such machines not constructed according to my invention.

The driving power is imparted to the machine by a belt passing over pulley 12, set on the shaft 11, and which pulley is preferably made integral with the fly-wheel 57. This fly-wheel, while not essential, is very advantageous to be used on this shaft to compensate for the variations of power, required by the varying resistance of the material treated. on the other end of shaft 11, and over pulley 59, keyed to the shaft 17, drives the feeding part of the machine when the idler 60, mounted on stud 61, set in lever 63, is depressed to increase the extent of the contact and the tension of the belt. Gear wheel 19,- mounted on the shaft, engages with the gear wheel 18, mounted on the shaft of the apron roll 30, and drives it to draw the apron 32 in the direction from the roll 31 toward the feed rolls 6 and 7. The gear driving these feed rolls has already been described above.

I claim as my invention:

1. A shredding machine, comprising aframe, a series of stationary, and a series of rotary, shredding knives mounted in the frame in position to co-act; means for rotating the rotary shredding knives; feed rolls mounted in the frame, adjacent to the shredding knives, and gears, operatively connected with the rotary shredding knives and withthe feed rolls, for positively driving each feed roll independently of the other but at the same correlative speed, and proportionate to the speed of the rotation of the disintegrating shredding knives; substantially as herein shown and described.

2. A shredding machine comprising a frame, a series of stationary, and a series of rotary, shredding knives mounted in the frame in position to co-act; means for rotating the rotary shredding knives; feed rolls mounted in the frame, adjacent to the shredding knives; a conveyor set up in the frame in coiiperative connection with the feed rolls; transmission gears operatively connected with the means for rotating the rotary shredding knives, and also with the feed rolls, and with the conveyer, for posi tively driving each feed roll independently of the other, and also the conveyer, at a speed proportionate to the speed of the rotary shredding knives; substantially as herein shown and described.

3. A shredding machine comprising a frame, a shaft. a series of circular saw-like blades mounted on the shaft at an angle deviating from right angle to the axis of the' A belt, stretched over pulley 58, fixed shaft, and spaced apart by correspondingly shaped washers, the saw-blades and washers being secured together, and to the shaft, constituting a compact cylindrical shredding implement; feed rolls mounted in fixed bearings on the frame, a feed roll, mounted in bearings set on a. movable frame, and means for moving the feed roll in and out of cooperative position With the other feed roll; a conveyor set up in the frame in cooperative connection with the feed rolls; transmission gears operatively connected with the rotary shredding knives, and also with each of the feed rolls, and With the conveyer, for positively driving each feed roll independently of the other, and also the conveyer, at a speed proportionate to the speed of the rotating circular shredding blades; substantially as herein shown and described.

4. The combination with mechanism for disintegrating paper stock, and with means for actuating the mechanism, of a pair of feed rolls, mounted in cooperative position relatively to the disintegrating mechanism, and of gears for positively driving each of the feed rolls independently of the other, but at the same correlative speed to the speed of the disintegrating mechanism; substantially as herein shown and described.

5. The combination with mechanism for disintegrating paper stock, and with means for actuating the disintegrating mechanism, of a pair of feed rolls rotatably mounted in cooperative position relatively to the disintegrating mechanism, of gears for positively driving each of the feed rolls independently of the other, but at the same correlative speed to the speed of the disintegrating mechanism, and of means for continuously conveying the material to be operated upon to the feed rolls, at the same rate of speed as the feed rolls are driven; subtantially as herein shown and described.

6. The combination with mechanism for disintegrating dry paper stock, and with means for actuating the disintegrating mechanism, of a pair of feed rolls, rotatably mounted in cooperative position with the disintegrating mechanism: a conveyer for the dry paper stock to the feed rolls; transmission gears connected with the means actuating the disintegrating mechanism. and with the feed rolls and with the conveyer, for positively driving each feed roll independently of the other, and also the conveyer, at a speed correlative to the speed of the disintegrating mechanism: substantially as herein shown and described.

7. The combination with mechanism for disintegrating dry paper stock. and means for actuating the disintegrating mechanism, of a feed roll rotatably mounted in fixed bearings adjacent to the disintegrating mechanism. and of a feed roll mounted in bearings ailixed to movable supports above the other feed roll; means for moving. the to the speed of the disintegrating mechasupports; a conveyer for the dry paper stock nism; substantially as herein shown and (le- 1 'J to the feed rolls; transmisslon gears connectscribed.

ed with the means actuating the disinte rat- I j r ing mechanism, and with the feed rollsfand G130 hY FHER' with the conveyer, for positively driving Witnesses:

each feed roll independently of the other, GEO. MCA. GILBERT,

and also the conveyer at a speed correlative S. S. LINNI'JY.