US1187731A - Paper-stock-screening machine. - Google Patents

Description

A; J, HAUG. PAPER STOCK SCREENlNG MACHINE.

7 APPLICATION FILED SEPT.8, 1915- 1,1 W33 11 r Patented June 20, 1916.

4 SHEETS-SHEET I.

: T ||r. cnumnm PLANOGRAPII co. WASHINGTON, 07 c.

A. I. HAUG.

PAPER STOCK scmmme MACHINE.

APPLICATION FILED SEPT- 8| 1915- I 7 L1 1 Y Patented June 20, 1916.

4 SHEETS-SHEET 2.

THE co umn PLANOGRAPH co., WASHINGTON. D- c.

A. J. HAUG.

PAPER STOCK SCREENING MACHINE. APPLICATION mto SEPT- 8, I915.

Patented June 20, 1916.

,QLM,

A THE COLUMBIA PLANOGRAPH 0)., WASHINGTON, D. C.

A. J. HAUG. PAPER STOCKSCREENING MACHINE.

APPLICATION FILED'SEPT- B. 1915.

11 1 8 7,?3 1 a Patented June 20, 1916.

4 SHEETS-SHEET 4.

THE! COLUMBIA PLANOGRAPH c0.. WASHINGTON, D. c.

r rib.

ANTON J. HAUG, OF NASHUA, NEW HAMPSHIRE, ASSIGNOR TO IMPROVED PAPER MACHINERY COMPANY, OF NASI-IUA, NEW HAMPSHIRE, A CORPORATION OF MAINE.

PAPERS'I'OCK-SGREENING MACHINE.

Specification of Letters Patent.

Patented June 20, 1916.

Application filed September 8, 1915. Serial No. 49,596.

To all whom it may concern:

Be it known that I, ANTON J. HAUG, a citizen of the United States, and a resident of Nashua, county of Hillsboro, State of New Hampshire, whose post-oflice address is care of Improved Paper Machinery Company, Nashua, New Hampshire, have invented an Improvement in Pa13er-Stock=Screening Machines, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to paper machinery and more particularly to improvements in machines for screening paper pulp.

An important object of the invention is to provide a screen of greater efficiency than those heretofore in use. Screens as heretofore constructed have consisted in unitary bodies provided with screening openings through which the stock is forced from the interior of the screen drum. Owing to the work in keeping the openings clean, a large part of the screening area is lost after the screen has been in operation for a while, and the screen is operated thereafter at a comparatively low efficiency.

In a prior application filed by me I have disclosed a screen having openings auto matically kept clean, such openings being preferably formed between relatively movable parts. The present invention in one aspect thereof constitutes an improvement upon the screen disclosed in said former application.

The invention will be best understood by reference to the following description when taken in connection with the accompanying illustration of one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims, it being understood that while I have shown my invention as applied to a centrifugal screen, it is in no wise limited thereto, but may be employed in connection with screens of various types and construction and used for different purposes.

In the drawings: Figure 1 is a plan view of a paper and pulp screen embodying one form of the invention; Fig. 2 is a longitudinal sectional elevation thereof upon the irregular dotted line 22 of Fig. 4:; Fig. 3

the rotary or centrifugal type, but which may be of any other suitable type, is provided with a casing 01' housing 1 having a stock inlet 2, an outlet 3 for screened stock, shown most clearly in Fig. 4, and an outlet 4 for tailings or waste, shown most clearly in Fig. 2. Said housing incloses the operative parts of the screen.

The stock which is fed through the inlet 2 is carried through a stationary conduit 5 and is deflected at one end by the bellshaped spreader plate 6 against the interior of the screen. The said spreader plate is fast upon the main shaft 7, mounted in main bearings 8, 9 of any suitable construction. The framing of the machine is provided with suitable brackets 10, 11 for supporting the said main bearings. The said main shaft 7 is provided at one end with a driving pulley 12 and adjacent the opposite end with a double-thrust bearing 13 provided with a longitudinally extending hub 14 internally threaded as represented at 15. In axial alinement with the main shaft 7 is a short shaft 16 suitably mounted in a bearing 17 and threaded at its inner end 18 to engage the internal threads upon the hub 14 of the double-thrust bearing. Fast upon the end of said shaft is a hand wheel 19. The construction of parts is such that by rotation of the hand wheel 19, the double-thrust bearing 13 of the main shaft is moved in one direction or the other, thereby to impart axial adjustment to said main shaft.

In my previous application above referred to, I have disclosed a screen provided with a series of slots or openings, the walls of each opening being composed of two members, at least one thereof being movable. In the present invention I contemplate the employ ment of relatively movable members, the spaces between which constitute the slots or openings of the screen. I contemplate the provision of any suitable means for effecting adjustment of said members.

The provision of means for effecting the screen may be variously formed.

adjustment of the screening openings enable me to make a finer grade of paper with a poorer grade of stock than has heretofore been possible. I am enabled in the practice of my invention to provide openings or slots of from" two thousandths to four thousandths of an inch in thickness for either paper or pulp machines. In the practice of my invention, however, I am in nowise limited to such dimensions, as the diameter and size of the slots of openings may be widely varied within the scope and purpose of the invention/ Heretofore, so far as I am 1 where such walls are primarily a fixed distance apart.

Furthermore, the adjustment also permits the taking up of wear. So far as I am aware, I am the first to provide screening openings which may be varied in size, and I desire to ClitllllllllG same broadly. The walls of the slots or openings of the ably, however, I provide series of disks or members," certain of which are adjustable,

and certain'of which in the disclosed form V of the invention are-fixed.

Herein for the purpose I have keyed or otherwise fixed upon the main shaft 7a series of spiders or spider-like members20 having outer ring-like portions 21, shown most'clearly in Fig. 2. The said spiders or members 20 have hubs 22 keyed'or otherwise fixed upon the said main shaft 7 where- 'by in the rotation of the said main shaft, the

spiders or members 20 are rotated therewith.

VVithin the end walls of the housing 1 I mount four parallel shafts 23, indicated most clearly in Fig. 4, said shafts being positioned about the main shaft 7 at suitable distances apart. Each of said shafts is mounted in suitable bearings 24, 25, formed in the endwalls of the'housing; and keyed or otherwise fixedly positioned upon each of said shafts 23 is a series ofdisks 26 having hubs '27 keyed upon said shaft. The circumferential portions of eachof said disks 26 may be of any suitable construction, but herein I have represented each of said disks as somewhat flared or widened at one face adjacent the periphery thereof, as indicated at 28 in Fig. 2;

The spiders or members 20 mounted upon the main shaft 7 are laterally adjustable by Prefer-- means of the axial adjustment of said main shaft 7 and the said members 26 are, in the disclosed embodiment of my invention, laterally adjustable. Such lateral adjustment may be effected in any suitable manner, but preferably by means of the axial adjustment of the several shafts 23. To this end I may provide any suitable means, but I have herein represented each of said shafts 23 as threaded at one end 29. Upon said threaded ends of said shafts 23 are mounted gears 30 having hubs 31 internally threaded at 32 to receive the threads of the shaft 23. I have herein represented each of said gears 30 as having a surrounding'gear guard 33. Each of said gear guards is provided with a double-thrust bearing 34.

By imparting rotative movement to the gears 20 I effect axial adjustment of the shafts 23. Herein for the purpose I have represented the housing 1 as having thereon a suitable bearing 35 surrounding the main shaft 7 and loosely receiving thereon the gear 36 meshing with each of the adjusting gears 30. By rotation of the gear 36 the gears 30 are turned in either direction and thereby axial movement is imparted in the desired direction to the shafts 23. I have herein represented said gear 36 as having fast thereto a hand wheel 37, permitting the ready rotation thereof.

In addition to the spiders or members 20 and disks 26 I preferably provide another series of disks constituting a wall of the slot opening or openings. To this end I have in the disclosed embodiment of the invention provided a plurality of fixed shafts, spindles or rods 38, herein shown in Fig. 4 as four in number. These stationary shafts or spindles are positioned in parallelism about the main shaft, suitably spaced therefrom and from each other. Each of said stationary shafts or spindles 38 is mounted in hearings or recessed portions 39, 40 of the heads of the housing and extends therethrough at one end where it is provided with suitable lock nuts 41 whereby the said shafts or spindles may be held fixedly in position. Keyed or otherwise fast upon each shaft, spindle or red 38 is a series of disks 42 provided with hubs 43 received upon said shaft. As shown most clearly in Fig. 2', each of said disks 42 extends between one of the disks 20 upon the main shaft 7 and one of the disks 26 upon one of the shafts 23. Preferably each of said disks 42 is provided at its periphery with a laterally extending rib 44 which may in certain positions of adjustment rest upon or contact with the periphery of the disks 26.

In the disclosed embodiment of the invention the screen is in effect of a general conical form, this being secured by the employment of disks 20 which are of successively greater diameter from the stock inlet to the outlet, by the employment of disks 42 the openings whereof are of successively increasing diameter from said stock inlet to the stock outlet and by the employment of disks 26 which are also of successively increasing diameter from said stock inlet to the stock outlet.

Viewing Fig. 2, it will be observed that the disks 20 and 26 may be adjusted l aterally in either direction with respect to the stationary disks t2 and that therefore openings or slots of any suitable diameter may be formed between said disks, which may within the scope and purpose of my invention be brought into contact or substantially into contact with each other. The lateral lips A of the disks 42 provide bearings along or with respect to which the disks 26 may slide in the lateral adjustment of the latter. The screen in this embodiment of my invention is provided with suitable water rings to prevent leakage of the stock. I have herein represented such rings at 45, 46 and d7. I also provide suitable shower pipes, herein represented at 48 and 4:9 and which preferably are the same in construction and function as the corresponding pipes shown in my said earlier filed application. I also provide a suitable water distributing chamber 50 and a water feed pipe 51 which may also be similar to the corresponding parts of said application. In that embodiment of the invention herein shown, one wall of each slot or opening is formed by the rotating spiders or members 20, the other wall of each opening or slot being formed bv the lateral surface either of the laterally adjustable disks 26 or the fixed disks 42, the construction being such that the disks 26 and 4-2 are constantly in lateral engagement by reason of the lateral lips 44 upon said disks 42. The lateral adjustment of the disks 20 and 26 with respect to the fixed disks 4E2 effects the desired variation in or adjustment of the diameter of the slits or openings of the screen.

Within the broad scope and purpose of my invention I contemplate the provision of a screen which may be fiat, conical, cylindrical or of any other suitable shape, provided with slots or openings, the walls of each slot or opening (if a plurality thereof be employed) being composed of opposing members whereof at least one is movable in a rotatable or longitudinal direction such as to effect a clearing of the slots or openings and a drawing of the fibers through said slots or openings, at least one of said members being laterally adjustable so as to vary the effective width of the slots or openings. I am not limited to the use or employment of any particular number of slots or openings, one only of which may be employed within certain aspects of the invention. By providing a screen composed of opposing members, preferably spaced so as to provide a slot, or slots, I efi'ect a drawing action of the fibers before they enter the slots and also in their passage therethrough. I thereby effect a displacement of the individual fibers from the body or mass thereof.

From the foregoing description it will be evident that in the use of the disclosed embodiment of my invention the stock as it is delivered to the screen is caused to move to the interior thereof and the unscreened portions moved toward the larger or delivery end. lVater is supplied to the shower pipes 18 and 49. In the rotation of the screen the water is thrown by centrifugal force to the circumferential walls of the housing and enters the said shower pipes from which it is supplied to the interior of the drum. I thereby avoid the necessity of stuffing boxes. Obviously, however, water may be supplied in any other suitable way.

Having thus described one illustrative embodiment of my invention, I desire it to be understood that although specific terms are employed in the foregoing description, they are used for purposes of description and not for limitation, the scope of the invention being set forth in the following claims.

Claims:

1. In an apparatus of the class described, a screen having a series of slots or openings, the walls of each opening being composed of two members at least one of which is movable in the direction of the length of said slots or openings, and means for changing the width of said openings.

2. In an apparatus of the class described, a screen having a series of slots or openings, the walls of each opening being composed of two men' bers at least one of which is movable in the direction of the length of said slots or openings, means for changing the width of said openings, means for supplying stock to the screen and means for discharging the screened material and the tailings.

3. In an apparatus of the class described, a screen having a series of'slots or openings, the walls of each opening being composed of two members, one of which is fixed and the other of which is movable in the direction of the length of said slots or openings, and means for effecting a change in the width of said slots or openings.

4. In an apparatus of the class described, a screen having a series of slots or openings the walls of each opening being composed of two members, one of which is fixed and the other of which is movable in the direction of the length of said slots or openings, means for effecting a change in the width of said slots or openings, means for supplying stock to the screen, and means for discharging the screened material and the tailings.

5. In an apparatus of the class described, a screen comprising members separated by slots, said members being alternately fixed and movable in the direction of the length of the slots, and means for varying the width of said slots.

6. In an apparatus of the class described, a screen comprising members separated by slots, said members being alternately fixed and movable in the direction of the length of the slots, means for varying the width of said slots, a screen stock inlet, a screen stock outlet, and an outlet for the tailings, all communicating with said screen.

, 7,. In an apparatus of the class described, a screen having a slot or opening, the walls thereofbeing composed of two members, at least one of which is movable in the direction of the length of the slot or opening, thereby to keep the slot cleaned and to draw the fibers therethrough, and means for varying the width of said slot.

8. In an apparatus of the class described, a screen having a slot or opening, the walls thereof being composed of two members, at least one of which is movable in the direction of the length of the slot or opening,

gas

thereby to keep the slot cleaned and to draw the fibers therethrough, means for varying the width of said slot, means for supplying stock to the screen, and means for discharging the screened material and the tailings.

9. In an apparatus of the class described, a screen having a plurality of members to effect drawing action of the fibers and to separate individual fibersfrom the mass thereof, the members of said screen being relatively laterally. adjustable, whereby slots or openings may be provided therebetween, at least one of said members being movable 1n the'direction of the lengthof said slots or openings.

10. In an apparatus of the class described,

.- a screen comprising members. separated by circumferential slots, said members being alternately fixed and movable in the direction of, the length of said slots, and means for effecting changeninthe width of said slots. 4

11. In paper manufacture, a centrifugal screen having circumferential screening slots adjustable in width for the stock to' pass from the interior to the exterior of the screen, the said slots being formed between relatively movable parts.

12. In paper manufacture,a centrifugal screen having a plurality of parts separated of the other set and spaced therefrom by circumferential screening openings adjustable in width. I

14. In paper manufacture, a centrifugal screen having a rotatable member provided with a plurality of ring-shaped members separated by circumferential openings and other circumferential members movable relatively thereto in the direction of the length of said circumferential openings between said first-named members, but separated therefrom, and means for varying the width of said circumferential openings.

15. In paper manufacture, a centrifugal screen having a plurality of circumferential screening openings, means located within said screening openings for keeping the same clean, and means for changing the width of said openings. p

16. In paper manufacture, a centrifugal screen having a plurality of openings, means circumferentially arranged in said openings but spaced between the walls thereof, said means being movable relatively to said screen, and means for changing the width of said openings.

17 In an apparatus of the class described, a screen having three sets of members providing slots or openings therebetween, one set of said members being longitudinally movable in the direction of said slots or openings, and a plurality of sets of said members being laterally adjustable to effect changes in the width of said slots or openings.

18. In an apparatus of the class described, a centrifugal screen having three sets of disk-like members forming slots or openings therebetween, one set at least of said members being rotatable, and a plurality of said sets being laterally adjustable.

19. In an apparatus of the class described, a centrifugal screenhaving a main rotatable shaft provided with a set of disk-like members, and a plurality'of axially adjustable shafts having disk-like members interposed between the disks or members of said main shaft.

20. In an apparatus of the class described, a centrifugal screen having a main rotatable shaft provided with a set of disk-like members, a plurality of axially adjustable shafts having disk-like members interposed be tween the disk-like members of said main shaft, and a plurality of supports for a fixed third set of disk-like members also interposed between the members of said main shaft. j

21. In an apparatus of the class described, a screen having a main shaft provided with a series of disk-like members rotatable therewith, a plurality of shafts parallel with the main shaft and having disk-like members thereon, alternating with those of the main shaft, and means for axially adjusting said plurality of shafts whereby circumferential slots or openings of adjustable width are formed between said. disk-like members.

22. In an apparatus of the class described, a main shaft having a series of disk-like members rotatable therewith, means axially to adjust said shaft, a plurality of shafts surrounding the main shaft and each having thereon disk-like members alternating with those of the main shaft, and means axially to adjust said plurality of shafts.

23. In an apparatus of the class described, a main shaft having a series of disk-like members rotatable therewith, means axially to adjust said shaft, a plurality of shafts surrounding the main shaft and each having thereon disklike members alternating with those of the main shaft, means axially to adjust said plurality of shafts, a plurality of stationary shafts also surrounding said main shaft, and a series of disk-like members upon said stationary shafts also alternating with the disk-like members of the main shaft.

24. In an apparatus of the class described, a screen having a main shaft provided with a series of disk-like members rotatable therewith, two setsof shafts surrounding said main shaft and each having a series of disk-like members thereon alternating with those of the main shaft, and means for effecting the relative lateral adjustment of said series of disk-like members whereby screening openings of adjustable width may be provided between said disk-like members.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

ANTON J. HAUG. Witnesses:

ROBERT I-I. KAMMLER, IRVING U. TOWNSEND.

Genie-a of this. patent may be obtained for five cents each, by addressing the Commissioner of ratenta. Washington, D. G.

Images