US2111835A - Paper machine table roll structure - Google Patents

Description

March 22, 1938.

PAPER MACHINE TABLE ROLL STRUCTURE Filed May 20, 1936 1 T- 1 3 J7 fii- 1 0 V5 16 E. E. BERRY 1 2,111,835

reamed Mar. 22, 1938' 2,111,835 1 UNITED STATES- PATENT OFFICE IAI'ER MACHINE TABLE ROLL STRUCTURE Earl n. Berry, Beloit, Wis., assignor to Beloit Iron Works, Beloit, Win, a corporation of i Wisconsin I Application May 20, 1936, Serial No. "80,762

8 Claims. (01. 92-51) This invention relates to table roll bearing support the rolls for more than 180 of their diamports or journals that can be adjustedin size eter along their entirelength orsubstantially their along the length of the rolls. entire length and to provide means for varying More specifically this invention relates to table the size of the bearings along their length. roll structure for paper machines wherein small Another object of this invention is to provide a 5 diameter rolls are rotatably supported around hydraulic seal cooperating with the deckle straps more than 180 of their peripheries for substanof a paper machine for sealing the suction boxes tially their entire length in adjustable bearing of the machine. 9 supports and includes a hydraulic seal for a form- Other and further objects of this invention will 10 ing wire supported by the rolls. be apparent from the following detailed descrip- 10 In my copending applications entitled: Table tion of the annexed sheet of drawing which illusroll structure for paper machines", Serial No. trates preferred embodiments of the invention. 55,753, filed December 23, 1935, and Pressure 0n the drawing: and vacuum forming paper making machine, Figure 1 is a fragmentary side elevational dia- Serial No. 71,109, filed March 27, 1936, I have degrammatic view of the web forming section of a 15 scribed and claimed table roll structure for paper paper machine having suction boxes mounted machines in which suction boxes are mounted under the upper run of the forming wire and con- .under the upper run of the forming wire and containing a plurality of small diameter table rolls tain a plurality of small diameter table rolls for rotatably mounted in adjustable bearings acsupporting the wire.. These rolls are rotatably cording to this invention.

mounted for their entire length or substantially Figure 2 is an enlarged cross-sectional view, 20 so in bearingscarried by the suction boxes. The with parts in elevation, taken substantially along bearings can be supplied with a liquid such as the line II-II of Figure 1. water to lubricate the rolls and to overbalance Figure 3 is a cross-sectional view, with a part the weight of the wire on the rolls by hydraulic in elevation, taken substantially along the line 25 pressure. III-III of Figure 2.

I have now provided improvements in the beargu e 4 is a cross-sectional w, Similar to lugs for the small diameter rolls wherein varia- Figure 3, illustrating a modified form of a j ttions in the diameters of the rolls or in the bearable bearing for small diameter table rolls acings themselves, due to inaccuracies in machincordin to this invention 30 ing or uneven wear of the parts, can be compen- AS shown on the drawin sated to maintain the rolls properly seated by In Figure e e e ce e a "3 dicates adjusting the size of the bearings along the length a ast r l of a rd i r t p pap r ma hi of the rolls. 1 have also improv d th hydraulic The reference numeral it indicates a couch roll sealing of the deckle straps along the edges of Of the P p machine T1718 T0118 W and U a e 35 the forming wire to prevent leakage of air into trained therebetween e Foul'drlniel forming W the suction boxes and have furthermore provided slots in the side walls of the suction boxes to Deckle t p Such as are un on each snugly receive the ends of the members carryside of the upper run of the wire l2 and are.

40 ing the bearings for the r ll trained betwen the usual deckle wheels i3 and it. 4

It is then an object of this invention to prodi g to this invention suction boxes such. vide bearings for table rolls that can be adas l5 and it are mounted under the upp r run justed in size along the length of the rolls. of the forming wire l2 and are slidably carried It is a further object of this invention tohroon the tracks H which extend through the loop tatably mo unt small. diameter rollers for subofthe forming wire i2 and in turn are supported 45 stantially their entire length in adjustablebearon standards -(not shown) outside of the loop ings and. to supply water under pressure to said of the forming r The Suction b01165 l5 and bearings for lubricating or overbalancing the Hi can thus be moved outside of the loop of the rolls. forming wire when it is desired to change the .30 A further object of this invention is to prowire.

vide suction boxes for paper machines with slots The side walls of the suction boxes 65 and it v in the sides thereof for carrying supports having contain a pluraiity of slots It for receiving therepassageways therein for liquids. in in airtight relationtherewith the ends of bars Another object of. this invention is to provide i9 each of which havean elongated passageway bearings for small diameter table rolls to sup- Zil'extendi'ng along substantially the entire length 55 of the bars except for the end portions thereof as shown in Figure 2. K

A header 2| for water or other lubricant is provided along one or both sides of each of the suction boxes l5 and I6. The passageway 26 in each bar I 9 communicates with a header 2| through an opening 22 (Figure 2) drilled in the end portion of each of the bars.

The headers 21 receive water through branch pipes 23 from a pipe-line 24 which may be connected to a source of water under pressure or to a water pump.

. As best shownin Figures 2 and 3 each bar I9 is recessed on both sides thereof as at 25 and 26 to define wall portions 21 and 28 of reduced thickness. at the top of the bar. These wall portions are somewhat flexible.

Bearing segments 29 and 30 are seated in the recesses 25 and 26 and extend up over the top of the portions 21 and 28 to define a cylindrical housing extending around more than 180 of a small diameter table roll 3i for substantially the entire length of the table roll 3|.

Clamping screws such as 32 extend through the bearing segments 29 and 30 and also extend through the reduced portions 21 and 28 of the bar l9. These clamping screws are spaced along the length of the bearing segments at desired intervals. If desired, one of the bearing segments such as 30 can be threaded for receiving in threaded relation the threaded ends 33 of the clamping screws 32. Obviously, however, a bolt can be used in place of the clamping screws and a nut separate from. the bearing segments can be used to tighten up these segments around the rolls 3|.

The bearing segments 29 and 30 do not contact each other so as to provide a passage 34 communicating with the passageway 20 of the bar l9. In this manner water or other fluid supplied from the header 2! to the passageway 20 of the bar can be forced up through the bearing segments around the table rolls 3|.

Any inaccuracies in machining the bearing surfaces of the segments 29 and 30 or the diameter of the table roll 3| can be compensated along the length of the roll by tightening or loosening the clamping screws 32. Since the reduced portions 21 and 26 are somewhat flexible the bearing segments can be drawn together by means of the clamping screws 32.

In the event that the portions 21 and 28 of the bars are not flexible, a desired adjustment of the bearing segments 29 and 36 can be made, as shown in Figure 4, by inserting resilient gaskets 35 between the bearing segments and the reduced portions of the bars? The clamping screws such as 32 can then be tightened to compress the gaskets and move the bearing segments into the desired bearing relation with the table rolls 3|.

As best shown in Figure 2, the bearing segments 2! and 36 and the top ends of the bars l9 terminate flush with the side wall of the suction box l5. This side wall has bolted thereon a plate or board 36 which extends above the top of the deckle strap l3 which rides partly on the edge of the forming wire l2 and partly on the table rolls such as 3!. The board or plate 36 is apertured opposite each table roll 3| to allow the table roll to extend therethrough if it is desired to couple the roll with a driven member such as is described in my above referred to applications.

A second board or plate 31 extends along the other side of the deckle strap l3 for the full length of the suction box II.

Both of the members 36 and 31 have grooves 38 and 39 respectively cut therein opposite the midportion of the deckle strap I3. These grooves or recesses 38 and 39 extend substantially the full length of the members 36 and 31 but are closed at the ends of the members.

Water is admitted to the chambers defined by the recesses 38 and 39 through pipes 46 and 4| which pipes, as shown in Figure 1, can be connected through a valve 42 to the main pipe-line 24 which supplies the table rolls with water.

With the supplying of water to the chambers defined by the recesses 33 and 39, the deckle strap I3 is sealed along both edges thereof by a hydraulic seal and suction from within the suction boxes i5 and I6 can be maintained without difllculty since the edges of the forming wire l2 are completely sealed against leakage of air into the boxes.

According to this invention the diameter of the housing formed by the bearing segments will be slightly larger than the diameter of the table rolls supported by the segments and the segments will then be pulled up into the proper bearing fit with the table rolls by tightening the clamping screws. Any inaccuracies in machining or uneven wear of the parts can thus be compensated to insure the proper bearing fit for the table roll along its entire length. When it is desired to operate the table rolls by overbalancing the same with water under pressure supplied through the passageways of the supporting bars the rolls will actually ride the upper half of the bearing supports so that these supports will doctor or scrape the surface of the roll and prevent any foreign substance from entering into the bearing sui'face. It is thus desirable that a true bearing flt be maintained throughout the entirelength of the roll so that leakage of water from the roll will be uniform throughout its entire length.

The table rolls of this invention are preferably of very small diameter. Diameters of the rolls are preferably less than o'ne-slxtieth of the length of the roll and rolls having a diameter of one inch or smaller can be satisfactorily operated on wide wire machines, since the same are fully supported along substantially their entire length in bearings which extend around more than 180 of the diameter of the rolls. This prevents the roll from sagging or bowing upwardly.

According to this invention the suction boxes having the small diameter rolls mounted therein are efiiciently sealed against leakage of air around the edges of the forming wire by hydraulic seals provided on both sides of the deckle strap.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

I claim as my invention:

1. An elongated supporting bar adapted to be mounted under the forming wire of a paper machine having ah elongated chamber formed in the top portion of the bar, spaced opposed bearing segments mounted on the sides of the bar and extending over the top thereof to define an open topped cylindrical bearing along the length of the bar, resilient gaskets disposed between the hearing segments and the bar and a plurality of clamping screws spaced along the segments, each of said screws acting on the segments to compress the gaskets for moving the segments together and thereby reduce the size of the bearing at any point along the length thereof.

2. A suction box for a paper machine comprising an airtight box having end walls, side walls and a bottom, said side walls having spaced slots formed in the top thereof, bars snugly seated in said slots and extending transversely across the width of the box, said bars having open top chambers formed along their length, segmental cylindrical bearing segments carried on top of said bars in spaced opposed relation, elongated table rolls rotatably mounted in said bearings, a plurality of clamping screws spaced along the length of the segments engaging said segments, each engaging said segments to draw the segments together for properly seating the rollers therein and means for supplying water under pressure to the chambers in the bars for flowing outwardly around the rollers.

3. In a roll structure for supporting a web forming wire, a journal for rotatably supporting a roll intermediate its ends comprising a pair of elongated spaced opposed bearing segments defining together an open topped cylindrical journal, and a plurality of means spaced along the lengths of the segments, each of said means acting on both bearing segments to draw the same together as desired whereby the journal is adjustable in size along its length.

,4. Table roll structure for paper making machines comprising a bar adapted to be mounted transversely under a forming wire having a slot extending longitudinally along the top thereof, a pair of elongated spaced opposed bearing segments on top of said bar defining together an open topped cylindrical journal, said segments having portions extending down along the sides of the bar, and bolts extending through said portions and the top of the bar for drawing the bearing segments'together and for holding the segments on the bar.

5. Table roll structure for paper machines comprising an elongated supporting member adapted to be mounted transversely under a forming wire, elongated spaced opposed bearing segments carried on top'of said member defining together an open topped cylindrical journal along the length of the member, and a plurality of means acting on the supporting member and said segments and spaced along the lengths thereof to move the segments together as desired whereby the journal is adjustable in size along its length.

6. Table roll structure for paper making machines comprising an elongated longitudinally through said segment portions and flexible wall portions to draw the segments together as desired along their length.

'7. Table roll structure for paper making machines comprising an elongated supporting member adapted to be mounted transversely under a forming wire, an elongated bearing segment carried on top of the member at each side thereof, said bearing segments defining together an open topped table roll journal, a resilient gasket interposed between a segment and the member and a plurality of means spaced along the segments, each of said means acting on both segments to compress the gasket anddraw the segments together. I

8. Table roll structure for paper making machines comprising an elongated supporting member adapted to be mounted transversely under a forming wire, said member carrying at the top thereof a pair of spaced opposed bearing segments defining together an open topped journal and a plurality of clamping means spaced along the length of the member through one of the segments and acting thereagainst to draw said segment toward the other segment for adjusting the size of the journal.

' I EARL E. BERRY.

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