US2188484A

US2188484A - Cylinder paper making machine

Info

Publication number: US2188484A
Application number: US141121A
Authority: US
Inventors: Guy M Peterson
Original assignee: Cheney Bigelow Wire Works Inc
Current assignee: Cheney Bigelow Wire Works Inc
Priority date: 1937-05-06
Filing date: 1937-05-06
Publication date: 1940-01-30
Anticipated expiration: 1957-01-30

Description

Jan. 30, 1940. e. M. PE' I ERSON CYLINDER PAPER MAKING MACHINE Filed May 6, 1957 :IIIF.

INVENTOR 607M Psru'esmv IZ ATTORNEYS Patented Jan. 30, 1940 UNITE STATES PATENT OFFICE Application May s, 1937. Serial No. 141,121

3 Claims.

This invention relates to improvements in cylinder paper making machines, and more particularly in the cylinder and means for rotatably mounting the same in working relation to the 5 pulp vat of said machine.

The usual paper making cylinder is constructed with an axial shaft and radially extended spokes or bracing from said shaft to a cylindrical frame carrying the paper making screen. The'cylinder is supported from its axial shaft which is mounted in end bearings exteriorly of the cylinder and the pulp vat in which it rotates. Due to such construction the employment of spray pipes for action against the interior surface of the cylinder requires cumbersome connections with the interior of the rotating axial shaft.

To simplify the construction for use of spray pipes I employ a hollow making cylinder which is devoid of axial shaft or radial bracing therefrom, and support the cylinder for rotation by bearing rolls which extend longitudinally through the hollow cylinder and upon which the cylinder rides for its rotation by bearing contact there-- with at the inner circumference of said cylinder. Such an arrangement leaves the open ends of the cylinder free of obstruction whereby any desired arrangement of stationarily mounted spray pipes may be extended into the interior of said cylinder for action against the inner cylindrical wall thereof.

A further improvement consists in the means for adjustably mounting the bearing rolls which support the cylinder whereby at least one of said bearing rolls constituting the main supporting element for the cylinder may be swung around upon its support so as to be located at the inner circumference of the cylinder directly opposite and in radial line with the location 'ofthe usual couch roll which in these paper making machines is mounted to work-against the outside of the cylinder in the removal of the pulp sheet therefrom as it is made. By thus mounting the main supporting bearing roll directly opposite the couch roll the-working pressure from the latter is effectively counterbalancedby the former so as to avoid any tendency of the cylinder being distorted or dislocated while in use. A second.supporting bearing roll ismounted for extension within the cylinder in parallelism with the first hearing roll and circumferentially spaced therefrom for giving a broad base of support for said rotatable cylinder, and the means for supporting said second bearing roll is also adjustable circumferentially within the cylinder so as to secure the broad base of support desired. Prefer (Cl. 9H3) ably also an idle counteracting roll is mounted to bear against the outside of the cylinder directly opposite the second supporting bearing roll.

An important feature of the present invention consists in means for mounting the supporting 6 bearing rolls for the paper making cylinder in bearings which are wholly outside of the pulp vat. This arrangement protects the bearings from contact with the acidulated waters of the pulp vat from which they would rapidly wear 10 out. A disadvantage of worn bearings is that the diiiiculties of preventing leakage into the ends of the cylinder are increased by the looseness of such bearings. On the other hand, protected bearings may have more efficient lubrication with consequent longer life. A further feature of the invention is in the provision of supporting means for said bearing rolls and cylinder which are independent of the pulp vat whereby this part of the apparatus may be readily adapted to exist- 0 ing pulp vats'which customers may already have installed.

Further details of construction and advantages of the present improvement 'will become apparent from the following/description. taken in connec tion with the accompanying drawing, in which,

Fig. 1 is an end view of the apparatus shown mounted in relation to the usual pulp vat which is shown in dotted lines; i

Fig. 2 is a view showing the cylinder in section 30 and the roller trunnion support in elevation;

Fig. 3 is a fragmentary sectional detail of the peripheral frame of the cylinder; and V Fig. 4 is a similar fragmentary sectional detail taken at right angles to that in Fig. 3.

Referring more particularly to the drawing, the pulp vat of the usual construction as shown in dotted lines is indicated at l, and it will be understood that the flow of pulp is in the direction of the arrow 2 into the'trough I partially surrounding the cylinder, and the water screened therefrom entering into the cylinder is withdrawn at the outlet 3 which communicates with the interior of the cylinder as shown in Fig. 2. The level of the water being drained from the interior of this cylinder is of course lower than the pulp-bearing water'of' the trough entering at 2 as is the. usual practice in the working of these paper making cylinder machines.

The paper making cylinder indicated generally at 4 is made up of a sturdy self-supporting peripheral frame comprising annular end plates 5 (see Fig. 4), and a plurality of interior circular hoops 6 acting as supporting ribs and spaced apart at regular intervals throughout the axial length of the cylinder and all tied to one another by tie rods I. Spacer sleeves 8 surround each tie rod 1 for keeping the hoops 6 spaced apart at proper intervals. The hoop assembly of members 6 l, and 8 is inturn secured to the end plates by tie rods 9. The inner fiat peripheral surfaces of said hoops 6 serve as bearing tracks for riding on the supporting bearing rolls 2|, 24 as hereafter described. The outer peripheral portions ll) of the hoops 6 are tapered slightly as shown in Fig. 4 and the narrow top edges thereof are notched at intervals around their circumference as indicated at |2 (Fig. 3), to receive bars l3, each of which has a flat base for fitting within the notches I2 and is somewhat triangular in cross section as shown in Fig. 3. The bars I3 extend longitudinally for the full axial length of the cylinder and abut at their ends the end plates 5. The upper edges of the bars l3 are also notched at intervals throughout their length and receive in said notches circumferentially disposed rings H which are disposed at equal intervals throughout the length of the bars l3 and upon the rings I4 is suitably secured the screen mesh IS on which the pulp sheet is formed. The annular end plates 5 of the cylinder are slidably sealed to ends of the pulp trough in suitable manner well understood in the art. It will be observed that as thus constructed the paper making cylinder is essentially a self-supporting cylindrical shell devoid of any axial shaft or radially disposed spokes and carries on its outer periphery the usual paper making screen.

At each side of the pulp vat exteriorly thereof is a bearing standard or frame such as It and I! of generally triangular shape. At the top of each standard as for instance H, are pivotally mounted two bearing supports or carrier members l8 and I9, both being pivotally mounted on a common pivot in said standard H. The design and arrangement is such that the axis of the pivot 20 coincides with the axis of the cylinder 4 to be supported therefrom as hereinafter described. Upon the bearing support I8 is suitably mounted one end bearing 20 for the main bearing roll 2 I, it being understood that the other .end bearing 22 is similarly mounted at the other The couch roll 26 is adjustably mounted in the end of a weighted arm 21 and as is well understood, the paper carrying felt 28 moving in the direction of the arrows in Fig. l is brought into contact with the surface of the cylinder 4 by said couch roll for continuously carrying away the pulp sheet as it is made on the cylinder. It will be observed that the main supporting bearing roll 2| is mounted at the inside of the cylinder 4 directly opposite the couch roll 28 so as to counteract the pressure therefrom. When ever any adjustment of the couch roll 26 on its arm 21 is required itbecomes possible by means of the mounting shown, to likewise adjust the position of the bearing roll 2| on the inside periphery of said cylinder 4 so as always to be maintained in direct opposition to said couch roll 26.

At each side of the main bearing roll 2| are located in stationary position the

spray pipes

24 and 25 for ejecting steam, air or water against the inner wall of the cylinder, and it is understood that further spray pipes may be employed as desired for extending within said cylinder 4. In the arrangement shown the spray pipe 24 discharges water to clean any clogged pulp from the inside of the cylinder and the spray pipe 25 discharges air or steam to make more easy and rapid the transfer of the pulp sheet from the cylinder 4 onto the felt 28 of the couch roll.

In the present construction it is contemplated that the cylinder 4 will be driven from the couch roll 26 which in turn is rotated in the manner well known in the art. The friction driving pressure between said couch roll 26 and cylinder 4 is counteracted by the bearing roll 2|, which as before stated, furnishes a support for the inner periphery of. the cylinder 4 throughout its length. Flanges 2| on bearing roll 2| and flanges 24' on bearing roll 24 running closely adjacent the annular end plates 5 serve to retain the cylinder 4 against endwise shift.

A further feature to be mentioned in connection with the cylinder 4 is that the spacer members 8 which surround the tie rods I (see Fig. 3)

are specially shaped to act as agitators in. stirring the water and in keeping it in movement away from the entire interior of the initial making side of cylinder 4 and thus assist in keeping the inside of the cylinder free for the continuous and rapid formation of paper on the outside thereof. The beveled sides of members 8 act as vanes or paddles tending to drive the water from the periphery toward the axis -of said cylinder when said cylinder is rotating in the vat. In order to provide a more steady support for the cylinder upon its bearing rolls 2|, 24 a supplemental steadying roll is mounted in a bearing 30' extending from the vat I, so as to bear on the outside of the cylinder opposite to supplemental bearing roll 24 as shown in Fig. 1.

It has been found in the use of the apparatus as shown that paper will be formed much more rapidly on the outside of the cylinder than is 1. In a cylinder paper machine comprising a pulp vat, a paper making cylinder rotating therein, and a couch roll, said cylinder having an open interior devoid of axial shaft and radial bracing and being provided with internal bearing surfaces circularly disposed at the inner circumference of said cylinder, the combination therewith of. a pair of spaced apart bearing rolls extending through said cylinder above its axis of rotation and in rolling engagement with the internal bearing surfaces of said cylinder for supporting said cylinder in its rotation, said bearing rolls being joumaled in carrier members mounted exteriorly of said pulp vat, supporting standards, the carrier members for one of said bearing rolls being pivoted in said standards at the axis of rotation of said cylinder, and means for adjusting said carrier members about their pivotal support to vary the position of said bearing roll circumferentially within said cylinder.

2. In a cylinder paper machine comprising a pulp vat, a paper making cylinder rotating therein, and a couch roll, said cylinder having an open interior devoid of axial shaft and radial bracing and being provided with internal bearing surfaces circularly disposed at the inner circumference of said cylinder, the combination therewith of a pair of spaced apart bearing rolls extending through said cylinder above its axis of rotation and in rolling engagement with the internal bearing surfaces of said cylinder for. supporting said cylinder in its rotation, said bearing rolls being journaled in carrier members mounted exteriorly of. said pulp vat, supporting standards, the carrier members for one of said bearing rolls being pivoted in said standards at the axis of rotation of said cylinder, adjustable struts connecting said standards andsaid carrier members for adjusting said carrier members about their pivotal support and for positioning said bearing roll directly oppositesaid couch roll.

3. In a cylinder paper machine comprising a pulp vat, a paper making cylinder rotating therein, and a couch roll, said cylinder having an open interior devoid of axial shaft and radial bracing and being provided with internal bearing surfaces circularly disposed at the inner circumference of said cylinder, the combination therewith of. a pair of spaced apart bearing rolls extending through said cylinder above its axis of rotation and in rolling engagement with the internal hearing surfaces of said cylinder for supporting said cylinder in its rotation, said bearing rolls being journaled in carrier members mounted exteriorly of said pulp vat, one of said bearing rolls being positioned directly opposite said couch roll, the other bearing roll being spaced circumferentially therefrom, and an outside steadying roll mounted for rolling engagement with the outer periphcry of said cylinder. directly opposite said last named supporting bearing roll.

GUY M. PETERSON.