US1889838A - Cleaning apparatus for the rolls of paper-making machines - Google Patents

Description

Dec. 6, NORMAN 1,889,838

CLEANING APPARATUS FOR THE ROLLS OF PAPER MAKING MACHINES Filed Aug. 29, 1950 2 Sheets-Sheet l Dec. 6, 1932. H. T. NORMAN 1,889,838

CLEANING APPARATUS FOR THE ROLLS OF PAPER MAKING MACHINES File d Aug. 29. 1930 2 Sheets-Sheet 2 Invenfiua H-w -w" M Patented Dec. 6, 1932 UNITED STATES PATENT Price HARRY T. NORMAN, OF EAST MILLINOCKET, MAINE, ASSIGNOR TO GREAT NORTHERN PAPER COMPANY, OF IVIILLINOCKET, MAINE, A CORPORATION OF MAINE CLEANING .APPAEATUS FOR THE ROLLS F IAPEQt-MAKING MACHINES .Application filed August 29, 1930. Serial No. 473,652.

This invention relates to paper making and particularly to apparatus for cleanlng the rolls, as the dryingrolls, or cylinders, of apaper making machine to remove any particles of pulp andthe like that may be adherent thereto.

With continued use, the sheet supporting surfaces of the drying rolls of a paper makingmachine accumulate loose pulp fibres and the like from the paper sheet, the fibres being strongly adherent to the surfaces of the rollsand unless they are removed before the accumulation becomes too great, they mark or score the surface of the sheet especially where the sheet is wet andtherefore soft and also decrease the drier efficiency and the heat transfer of the drying rolls covered with the fibres. V

One of the objects of the present lnvention 203 is the provision of an apparatus that can be moved from roll to roll and has a powerdriven cleaning brush that is rotatable in engagement with the surface of the roll for detaching any foreign matter that may adhere 130 the surface, without injuring the surface of the roll.

Another object of the invention is the provision of a cleaning apparatus that includes a wheeled platform that carries the cleaning device, the platform having one set of wheels so that the apparatus can be moved'lengthwise of the machine and having another set of wheels so that the apparatus can be moved axially of the rolls so that the cleaning brush can be moved from one end to the other of the 7 roll in engagement with the surface thereof. A yet further object of the invention is the provision of a cleaning apparatus that in cludes a rotary brush at one end of a shaft that is at least as long as the roll to be cleaned, the shaft being driven by a motor at the end remote from the brush and having a supporting device at the brush-end of the shaft that afitis engageable with the drier roll.

Another object of the invention is the provision of cleaning apparatus that includes a -rotary cleaning brush which is adapted to engage the-surface of two drier rolls at the same time and means whichis in engagement with the drier rolls for supporting the brush in engagement therewith.

A further object of the invention is the provision of cleaning apparatus having a power-driven rotary] cleaning brush and means for directing a blast of air at and ad jacent to the point of the surface of the roll for removing particles detached by the brush.

A further object is generally to improve the construction and operation of cleaning devices for the rolls of paper making machines.

Fig. 1 is a side elevation of a portion of the drier section of a paper making machine with the cleaning apparatus of the present invention associated therewith.

Fig. 2 is a side elevation of the cleaning apparatus embodying the present invention.

Fig. 3 is a. section taken along line 3-3 of Fig. 2.

Fig. 4: is a sectional cleaning brush.

, Fig. 5 is a view similar. to Fig. 3, illusview of the rotary trating a modified form of support for the brush-end of the shaft.

The cleaning apparatus embodying the present invention is especially adapted for although not necessarily limited to vthe conoint cleaning of the upper and lowerdrying rolls 10 and 12, respectively, of a paper present invention includes a truck or carriage 16 which supports the cleaning device. The cleaning device includ-esa rotary brush 18 which is composed of a plurality of similar brush sections that are arranged one be hind the other to provide a cleaning periphery of long axial extent. is composed of a plurality of stiff wires which are laid radially in the brush so that the free ends of the wires are located at the outer periphery thereof. The brush sections are carried on the end of a long driving shaft 20 and are clamped between a collar 22 fixed Each brush section V to said shaft and a nut 23 which is screwthreaded on the end of said shaft. The shaft is contained within an enclosing and supporting tube 24 and is journalled in suitable bearings 25, one of which is indicated in Fig. 3, located in the ends of the tube. The rear end of the tube is. clamped in asupporting bracket 26 which is secured to the table 28 of the carriage upon a spacing block 30 of suitable height to support the brush in operative position with respect to the height of the rolls of the particular machine being cleaned. If the rolls of different paper making machines are of different heights, the block 30 can be replaced by other blocks of suitable heights. The rear end of the shaft projects beyond the rear end of the enclosing tube 24 and has a large gear 32 fixed thereto. Said gear is in mesh with a small or pinion gear 34 which is driven by an elec: ric motor 36 that is also carried by the platform 28 upon blocks 38 similar to the blocks 30. By reason of the small and large gears 34 and 32, the speed of the brush is caused to be less than that of the motor, although the brush speed is adapted to be reasonably high. A speed of 650 revolutions per minute with a brush 8" in diameter gives good results. The shaft and its enclosing tube is adapted to be long enough so that the brush can be moved from one end to theother end of the drying rolls and thus are at least as long as the rolls. The carriage 16 is adapted to be moved axially of the drying rolls so as to move the brush from end to end of the roll. The carriage is thus provided with supporting'wheels 40 which are journalled on axes 42 carried by the lower part of the carriage and at right angles to the shaft 20.

Since the shaft 20 is of substantial length, means is provided to support the shaft adjacent the brush by the drier rolls. The supporting means here shown includes a hub 41 which is fixed upon the outer end of the enclosing tube 24 and is secured in place by suitable means as the set-screw 44. The hub is provided at its lower portion with opposit-ely extended arms 46 and 48 which over lie the top of the lower drier roll and in the ends of which arms small wheels 50 are ournalled, said wheels being-adapted to rest upon and be in rolling engagement with the dry ing roll. The hub is also provided with a third arm 52 which exten ls upwardly above the aforesaid arms 46 and 48 and is pivoted tosaid hub by a pivot pin 54. The upper end of said arm rotatably supports wheel or roll 56 which is adapted to be in engagementwith the upper drying roll 10. Right and left handed screw-threaded rods 58 and 60 are pivotally connected respectively with the arms 52 and 46. Said rods are connected by a turn buckle 62 which by rotation in one directionor another determines the spacing between the wheels 50 and 56 and thus closest distance between said rolls. 7 brush is rotated rapidly and "the drier rolls of the brush with respect to said rolls.

In use the position of the brush is so disposed by a proper adjustment of the arm 52 that the brush is in engagementwith both the upper and the lower drier rolls lO'and 12, the brush being larger in diameter than the The are rotated slowly so as to bring all parts of the periphery of the rolls in contact with the brush. The 'brush'is moved slowly from one end to the other of the rolls as the cleaning progresses by manually moving the truck 16 on the wheels 40 so that the entireaxial extent of the rolls is subjected tothe cleaning action of the brush. Since the tendency of the brush, due to its rotation and the ro-,

tation of the driers, is to pull the brush into closer engagement with the driers, one of. the

purposes of the arms 52 and 46 is to prevent this forward movement, thearms being in engagement with both rolls and thereby opposing and preventing such movement. In some instances it is not necessary to use the arm- 48 and in F 1g. 5 the hub 42 is lllustrated with the arm 48 omitted. The arms 52a and46a of this figure are sufficient to support the brush in operatlve position in engagement with both rolls and to hold the brush frombeing pulled into the space between the rolls by the rotation of the brush and rolls. The arm 48, however, is desirable when only a-single roll is being cleaned as it cooperates with thelarm 46 in supporting the brush upon the r0 After one set of rolls is cleaned, the device is adapted to be moved along the drier section to theneXt set of .uncleaned rolls. Tothis end the truck 16. is provided with a second set of supporting wheels 64 which are rotatable at right angles to the wheels 40. Said wheels 64 are journalled in frames 66. which are vertically movable in guideways v68 of the truck 16. under control of a IHELHUZlllY-TO- tatable shaft 70 which is journalled in the frame of the truck and has eccentrically arranged pins 72 in the ends thereof that are received in horizontal slots 74 of cross bars site sides of the truck. By rotating theshaft 70 throughout 180, from the position illustrated in Fig. 1, the framcs66are caused to be lowered into engagement with the floor whereby to raise the truckofl' thev wheels 40 and thus to permit the truck to be moved lengthwise of the drier. When the truck and the cleaning wheel 18 are located in proper .115 7 6 that connect the two frames 66 on oppo-l away from the drying rolls and to move the cleaning brush lengthwise of the rolls.

Pneumatic means are employed to blow the loosened particles of foreign material away from the vicinity of the brush and the rolls. To this end a pipe 78 is secured by suitable means as the clamps 80 to the tube 24 and is extended lengthwise of the tube and is adapted at the motor end to be connected to a flexi ble pipe 82 which communicates with a suitable source of air under an elevated pressure. The brush end of the pipe is provided with opposed branches 84 which terminate in nozzles 86 that are inclined to direct blasts of air onto the surfaces of the upper and lower rolls at locations adjacent the region of engagement of the brush with said rolls so as to sweep away the loosened particles of material from the vicinity of the brush.

I claim:

1. Cleaning apparatus for the rolls of a paper making machine comprising a wheeled truck, a driving motor thereon, a. horizontal shaft supported at one end by the truck and having a driving connection with the motor, said shaft being at least as long as the axial length of the rolls to be cleaned, a rotary cleaning brush on the free end of said shaft, and supporting means for said free end of said shaft located adjacent said brush and having supporting elements that bear upon the rolls to be cleaned.

2. Cleaning apparatus for the rolls of a paper making machine comprising a wheeled truck, a driving motor supportedthereon, a horizontal shaft having a connection with said motor at one end and having a rotary cleaning brush at the other end, said shaft being at least as long as the axial length of the rolls to be cleaned, a tube which encloses said shaft and provides a support therefor, said tube having a support on said truck at one end and at the other end having means which supports it upon the rolls to be cleaned.

3. Cleaning apparatus for the rolls of a paper making machine comprising a truck, a driving motor mounted thereon, a long shaft having a driving connection with said motor at one end and having a rotary brush at the other end which is adapted to engage the rolls and supporting means for the brushend of said shaft, said supporting means having members that bear on a pair of rolls, whereby to support the brush in engagement with both rolls.

4. Cleaning apparatus for the rolls of a paper making machine comprising a truck, a driving motor mounted thereon, a long shaft having a driving connection with said motor at one end and having a rotary brush at the other end which is adapted to engage the rolls, and supporting'means for the brushend of said shaft that bear on a pair of rolls, whereby to support the brush in engagement with both rolls, said supporting means ineluding opposed arms having rolLengaging wheels carried thereby. I

5. Cleaning apparatusfor the rolls of a paper making machine'comprisinga truck, a driving motor mounted thereon, a long sh'afthavinga driving connection with said motor at one end and having a rotary brush: at the other end which is adapted to engage 6. Cleaning apparatus for the upperand lower rolls of a paper makingmachine ineluding-a rotary brush-which is adapted to be located'in the space between saidrolls and in engagement with both of them, a powerdriven shaft which carries and .drives'said brush, and supporting means for said shaft comprising a member connected with saidits;

shaft having arms,wheels on said arms which are in rotatable engagement with said rolls,

and means to move said arms toward and away from each other and to hold themin any adjusted position.

7 Cleaning apparatus for the upper andlower rolls of a paper making machine comprising a rotary brush whichis adapted'to be located in the space between said rolls and in engagement with both of them, a powerdriven shaft which carries and drives said shaft, and'shaft-supporting' means havin a parts which engage both of said rolls an which hold said brush in a predetermined location with respect thereto and against the pull of said brush in its rotating engagement with said rolls. I r a 8. Cleaning apparatus for the rolls of a paper making'machine comprising a wheeled truck which is movable axially of said rolls, a driving motor supported on said truck, a

shaft having a driving connection with said motor and extended axially of said rolls, a

brush carried by said shaft on the end thereof remote from said motor, and shaft-supporting means located on said shaft adjacent said ion n a I rolls, and another arm which has a wheel that can roll upon an adjacent r0ll.. T

10. Cleaning apparatus for the rolls of a paper making machine comprising a truck a which is movable axially of a roll, a driving motor carried by said truck, a shaft having a driving connection with said motor and extended axiallyof said rolls a rotary brush carried by the end of saidshaft remote from said motor, a tube which encloses said shaft between. said motor and said brush and which {constitutes a support for said shaft and which has a support on said truck, and supporting means for the end of said tube adjacent said brush comprising a member carried by said tube, said member having outstanding arms provided with rolls which engage one of the rolls. V

11. Cleaning apparatus for the rolls of a '7 paper making machine comprising a truck whichis movable axially of a roll, a driving motor carried by said truck, a shaft having a driving connection with said motor and eX- tended axially of said rolls, a rotary brush carried by the end of said shaft remote from said motor, a tube which encloses said shaft between said motor and said brush and which constitutes a support for said shaft and which has a support on said truck, and supporting means for the end of said tube adjacent said brush comprising a member carried by said tube, said member having outstanding arms provided with rolls which engage one of the rolls, and another arm which has a roll that engages an adjacent roll.

12. Cleaning apparatus for the rolls of a paper making machine comprising a truck which is movable axially of a roll, a driving motor carried by said truck, a shaft having a driving connection with said motor and extendedaxially of said rolls, a rotary brush carried by the end of said shaft remote from said motor, a tube which encloses said shaft between said motor and said brush and which constitutes a support for said shaft and which has a support on said truck, and supporting means for the end of sald tube ad acent said brush comprising a member carried by said tube said member having outstanding arms.

provided with wheels which engage one of the rolls and another arm which has a wheel that engages an adjacent roll, and means to move certain of said arms toward and away from each other and to hoid them in adjusted position. I

In testimony whereof, I have signed my name to this specification. I

HARRY T. NORMAN.

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