US991999A

US991999A - Suction-roll.

Info

Publication number: US991999A
Application number: US57797210A
Authority: US
Inventors: Joseph Kieren
Original assignee: JOHN W MILLIGAN
Current assignee: JOHN W MILLIGAN
Priority date: 1910-08-19
Filing date: 1910-08-19
Publication date: 1911-05-09
Anticipated expiration: 1928-05-09

Description

Patented May 9, 1911.

2 SHEETS-SHEET 1.

5mm/hoz fase/D J'ercn' J. KIEREN.

SUGTION ROLL. APPLICATION FILED Ammo, mo

Patented May 9, 1911.

2 sHnETs-sHEBT 2. y

L e] u vente@ UNTTED STATES PATENT oEEIoE.

JOSEPH KIEREN, OF GILBERT, MINNESOTA, ASSIGNOR OF ONE-HALF TO JOHN W. MILLIGAN, OF DULUTH, MINNESOTA.

sUcTIoN-Roia.

Specification of Letters Patent.

Patented May 9, 1911.

Application filed August 19, 1910. Serial No. 577,972.

To all whom it may concern:

Be it known .that I, JOSEPH Kirmes', citizen of the United. States. residing at Gilbert, in the county ot St. Louis and State of Miunesota, have invented certain new and usct'ul Improvements in Suction-Rolls. ot which the following is a specification.

The present invention comprehends certain new and useful improvements in suction devices ot' that type designed for use on paper making machines, the device being arranged particularly to remove the moisture from the paper pulp which is carried thereover by a traveling screen. It is well known that the ordinary stationary suction boxes which are commonly employed for this purpose, are quite objectionable in use. This is primarily due to the fact that there is a suction in all parts oit the box at all times, the suction causing the screen to tend to cling to the box so that the movement of thc screen is retarded yand the friction betneen the parts is considerably increased. As a result, the wear on the screen is excessive and it soon becomes necessary to replace the saine by a new screen, the cost ot renewing the screen being quite a large item of expense.

The object ot' the present ,invention is an improved suction roller which is designed to supersede the ordinary stationary suction box and to overcomel its many disadvantages, the device being rotated as thc screen travels thereover in order to reduce the friction to a minimum.

A further object ot the invention is a roller of this character havingr a plurality ot' separate compartments in which an induced draft is created successively in order to remove moisture from the pulp ou thcv screen. The suction is created in only one. compartment at a time and is cut ofi" at a predetermined point. so that there is no suction at the point Where the screen leaves the roller, and

thus the tendency to cling to the roller isprevented.

A still. further object of the invention is a suction roller which is` thoroughly reliable and cllicient in operation, which possesses to a marked degree the characteristics of simplicity and durability and which consists of comparatively few parts and may be easily kept in repair.

With these and other objects in view that will more fully appear; as the description proceeds, vthe invention consists in certain constructions and arrangements of the parts that I shall hereinafter fully describe and then point out the novel features ot in the appended claims. i

F or a full understanding of the invention and the merits thereof and also to acquire a knowledge ot the details et construction, reference is to he had to the following description and accompanying drawings, in which:

Figure l is a front elevation, partly. in central longitudinal section, of my improved suction roller; Fig. 2 is a transverse section on the line Q-Q ot Fig. 1. Fig. 3 is a fragmentary perspective view of the hollow shaft; and, Fig. 4 is a View illustrating the application of the invention.

Corresponding,r and like parts are referred to in the Yfollowing description and indicated in all the views ot the drawings by the same reference characters.

A suction roller constructed in accordance with my invention includes a cylindrical drinn l which is suitably pertoratcd throughout its entire periphery, as indicated at 2. lThe drum is closed at its. ends by means of heads 3 that are formed with central openings for the reception of a stationary hollow shaft or axle 4 on which the drum is rotatably mounted. The shaft extends axially through the drum and projects some distance beyond the heads 3 thereof and is mounted in proximity to its ends in suitable supports 5. A,I closure 6 is fitted to one end ot the shaft, while the other end of the shat't is (Uien and is adapted to be coupled to a, suitable vacuum pump (riot shown). A plurality of partitions 7 extend throughout the length ot the drum and are disposed radially inwardly, with their inner edges preferably thickened and fitting againsty the sha'lt 4. There are preferably ten of these partitions and they divide the interior of the drum into an equal number ot separate longitudinal compartments, it being understood; however, that I do not limit. myselt` to this particular number of partitions, but may employ any number according as found most desirable in practice. '.lhe inner edges of the partitions are spaced apart transversely sons to` permit the compartmeuts to coimnunicate one at a-tiine'.

`drum rotates thevp'artitions move around 'the shaft and the compartments are brought successively into registry ,with the apertures 8.

' In order to reinforce the structure a transverse partition 9 is preferably provided within the drum at a point mid-way between the heads 3, said partition dividing each longitudinal compartment into tWo sections. This partition is formed with a ceu tral openingY to receive the shaft 4t. The heads 3 and) the transverse partition 0 are f formed around their central openings ,with laterally projecting annular flanges 10 for the purpose of providing a broad bearing upon the shaft. The flanges of the heads project inwardly Within the drum, While the Flange of the transverse partition extends laterally on both sides thereof.

Outstanding from the outer' face of each head is a tubular extension 1l that isarranged; concentrically with the shaft a and is spaced apart frointhe periphery vthereof to provide an annular space for the reception of packing l2. A gland 13 is applied to the tubular extension toconfine the packingjr therein and to complete the formation of a stuffing-box. The stung boxes provide air-tight joints between the drum and the,

shaft.

Caps lll are bolted or otherwise suitably secured to the heads 3 around the tubular extension l1, the caps extending around and substantially housing; the stuffing boxes and bearing' upon the shaft at points therebeyond. (,)ne of these caps is preferably formed with a cylindrical portion lf3 to which a drive belt may be applied to rotate the drum on the shaft, it being understood that the rotation of the drum maybe eit'ecte'd in any other suitable manner, if desired. Collars 16 encircle the shaft 4; between the caps 14 and the adjacent supports 5. the col# in abutting relation to lars oeing disposed the respective caps and being fixed on the shaft through the medium of set screws 1 7, whereby tohold the drum against the longitudinal movement on the shaft.

The shafts: is formed in its periphery with a longitudinal lgroove 18 Which extends throughoutthe'llengrth of the drum and preferably terminates at points beyond the stop collars 16. The groove. accommodates a pipe 19 which is designed to contain oil or other lubricant, the'pipc being Aperforated Within the drum to permit the lubricant to escape. The ends of the pipe are upturned and are connected to oil cups 207 the ends of said pipes bein;T closed by the cups so as to prevent air from being;n drawn through the pipe into the interif'u" of the drum. The pipe preferably. arranged on that side of the rou1 of apertures 8 troni' which therpartitions approach the apertures. and hence any excess llibre-ant fed on .ployed in lieu of the apertures.' l

aereos 'the edges of the partitions will he dravsin usual endless `wire screenl or 'apron .x21 the screen being suitablymounted on rollers 22. The screen isV adapted' to receive the Wet stock, such paper pulp, and is adapted'to travel on the rollers 22 so as to carry the paper pulp across the suction roller. The :creen extends around the upper portion of the periphery of the suction`i'oller for a distance somewhat greater than the Width of the i'ippermost longitudinal compartment. its this compartment communicates with the interior of the hollow shaft through the apertures 8, an induced draft is created so as to draw the moisture from that portion of thc paper pulp opposite the uppermost compartment. The suction roller is rotated. on the shaft as the screen is drawnforwardly, so as 'to reduce the friction between the parts to a minimum: :As-the suction roller turns, the said compartments thereof are moved out of registry with the apertures 8 so that the suction therein is automatically cut oit' before the point at which the screen leaves the suction roller is reached.. Thiais a very important feature of the invention since it obviates the 'tendency of the screen to cling to the suction roller and thus reduces Wear on the screen to a yrniniiniun and prevents the operation of'the screen from heing retarded. Upon the continued rotation of the suction roller the `longitudinal compartuients are successively'brought into registry with the apertures 8 so that draft is created therein. f Y

lt may beobserved that it is particularly desirable to establish communication between the interior of the shaft and the drum 1 by [means of the longitudinal row of apertures 8, inasmuch as the partitions? pass freely across the apertures in the rotation of the suction roller, the partitions Ahaving'no tendency to' catch or stick at thisxpoinhas would be the case ifa longitudinal slot Were-emrlhe perforations 2 of the drum are ar ranged in longitudinal rows and are flared or countersunk at their outer ends, as shown. The outer ends yof adjacent perforations are arranged very close to each. other, so as to cause the suction to be applied to theA entire transverse area of the screen 2l, instead of merely in spots, as would ybe the case if the perforations were spaced far apart..

Having thus described the invention, what l. claim is: i s

l. l suction' roller including a hollow shaft. a peripherally perforated drum rotatably mounted on the shaft, ineans for es an induced tablishing communication between the interior of the shaft and the interior ol thol drum, stuffing boxes outstanding from thcl ends of the drum and fitting around theI shaft to form tight. joints, and caps rigidly secured to the ends of the drum around the stulling boxes and substantially housingr thu stuffing boxes and bearing upon thrshaft boyond the stuffing boxes.

2. A suction rollor ol' tho Character doscribed including a hollow shaft, a poriph-l orally ]')(frt'orate l drum rotatably mounted on tho shall, means for establishing oommunication botwccn the interior ol the shalt and tho interior ol the drum, stuffingI boxes' in prosouce ot' two Witnesses.

JOSEPH KIEREN. "i tnessos J. l. HUusoN, L. OBiurtx.