US1770834A - Screen roll - Google Patents

Description

J ly 1 5, 1930. J. L. BEIQGEROVN 1,770,834

SCREEN ROLL Filed Dec. 10, 1928 3 Sheets-Sheet l 5O Z9 25\ 52 s a 45. I 9 I 5 Z0.

V -INVENTOI ma i-1W ATTORNEY.

July 15, 1930. J. L. BERGERON 1,770,834

SCREEN om,

Filed Dec. 10, 1928 3 Sheets-S1569i. 2

INYENTOE ATToeME July 15, 1930. J. L. BERGERON 1,770,834

SCREEN ROLL Filed Bags. 10, 1928 3 Sheets-Shegt 3 w 50. 47 p 53 l 49.

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- 4o. F167 Ex A ToEN Patented July 15, 1930 UNITED STATES sominn Ron. 7 i

Application filed December '10,. 192 8. sear m. were.

The inventiorr'relates to a screen roll, as described in the present specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially of the novel features of construction pointed out broadly and specifically in the claims for novelty following a description-containing an explanation indetail of an acceptable form of the invention The objects of theinventionare to elimina-te theframe or' frames within cylindrical rolls, particularly those formed ofwire mesh or other like material, and supportthe cylinder entirely from the end or head by maintaining the screen in tensionthroughout; to avoid irregularities on the sheet of pulp in paper making due to the deposit'of dirt or,

other particlesor loose endsfrequently picked up and redeposited by dandyrolls; to facilitate-the operation of'dandy-rolls sothat there will be no slipor drag, and no separa-' tion of the fibres from the pulp, and at the same time insure that the roll will always be in a cleanly condition thereby maintaining an even surface and an'even thickness of the sheet being produced; to do away with dented, creased or rolls otherwise deformed by enabling the-operator to replace a roll with great facility or straighten the'rollout and keep it soby'constant pull on the ends thereof; to drive a roll without distortion of the light material and yet drive it entirely to one end thereof; to produce aroll for special usesinindustrial pursuits that will keepitsshapeunder most conditions without being encumbered by an interior frame,

and-generally to provide at a moderate cost of-production a screen roll; light and durable and efiicient in operation.

In the drawings, Figure 1-; is a front e'leg vational view of the-screen roll and-expanding frames.

Figure 2 is-an elevational viewshowing theframe at one endand driving mechanism. Figure 3" is anelevational vlew showing the frame at the other end. a

Figure 4 is a longitudinal sectional view Figure 5 -i's" a longitudinal sectional" View of the screen roll and contiguous part'son the line 5"-'5 in F igure=2l I Figure 6 is across section'l View on the line 6+6 in Figure 1'."

V Figure 7 is a sectional detail of thesl'i'de mounting of the frames v Like numerals of reference. indicate-[corresponding parts'in the various fi ures- V In the description hereinafter'given in-this invention, the use oft'he screenroll will be confined to itsoperation in paper making, that is to' say,- it will be explained that thisscreen roll is particularly adaptable as a dandy roll-,- th'ough nothinghereinafter nintioned' need in any way confine-the invention to-this particular purpose.- v

Referring to the drawings,- tlieda'nd'y roll herein illustrated is in the form of a cylindrical" screen 15 of wire mesh secured oi-r-the ring flanges I6 and 17 at the ends, saidv flangesbeing preferably in the of a 'dise surrounding the hubs 18 anud 19' screwed on to thetrunnions" 20 and21-,= and forming the heads and journal-membersofa rot'ating' screen drum;

The drivingbevel gear transmission spur gear 23, and these two gears are secured through their web24 by thebolts25, to tlrieflanges I6and 17 and are mounted through their hub 2'6' on theitru-nnion 20 and'secu-redthereon by the key-27'.

The'transmi'ssion spur gear- 28-i s secured by the bolts 29m the flange 17- and ismo'unted by means of the hub '30 on the-ftrunnion-2l and secured thereto by the key '31; 1

The slidingb'earing frames 32 and-33 carry the trunnions 2'0 and 21- respectively and are locked thereon by the end' thrust bearings' '34 and 35 respectively screwed to -tlietrunnion's; The; slidingbearing brackets 32 and 33 extend"- upwardly and are slidablymounted dovetails-3'8 mounted on the dovetail grooves- 39 and the adjustingwedge pins 40 used in adjusting} thesliding connections of the sliding and fixed brackets:

'rhebraeketsse and 33 fiareoutwardly on each side forming infltlie bracket Bit-supports" for therodi la extending frolnthepistons' 43.

The cylinders are connected by the feed pipes 44 to a suitable supply of expanslle fluid, therefore it will be seen that on feeding air or steam into the cylinders 41 the pistons will be driven outwardly carrying the rods 42, and as the rods 42 are fixedly secured to the bracket 32 and the cylinders 41 fixedly secured to the bracket 33, naturally the brackets will be forced apart on each side of the screen 15, thus pulling on the screen from the ends, as the screen is firmly-held to said brackets by the thrust bearings 34 and 35, consequently any inequalities of the screen must be immediatelysmoothed out by the constant tension on said screen applied through the said cylinders and pistons operating therein. 7

The spray pipe 45 having the jet orifice 46 extends through the hollow trunnions 20 and 21 and out through the casings 47 and 48 enclosing said trunnions and thrust bearings 34 and the roller bearings 49, and it is by means of this spray pipe that the wire mesh screenis kept in a cleanly condition.

. The drip pan 50 is supported from the brackets 32 and 33 and extends partly under the screen so thatall the water sprayed on the inner wall of the screen will be caught by said pan. I

The transmission spur gears 51 and 52 coact with the transmission gears 23 and 28 respectively, and are mounted on the common shaft 53 journalled in the brackets 32 and 33.

The driving bevel is driven by the coacting driving bevel 54 mounted on the main shaft 55, which is connected to any suitable power, thus when the bevel gear 22 is drlven the transmission gear 23 rotates therewith as it is part thereof, and as the transmission gear 23 coacts with the transmission gear 51, the transmission gear 52 must coact with the transmission gear 28, thus the motion from the driving bevel gear 54 is transmitted to the opposite end of the screen roll thereby avoiding the distortion of the roll through the driving at one end only.

The main shaft 55 is journalled in the bearings 56 on the sliding bracket 33 and diametrically opposite the main shaft and main driving bevel gear.

The bevel gear 57 coacts with the bevel gear 22 and is mounted on the shaft 58 slidable in the bearings 59 secured to the bracket 32 and locked therein by hinged strap 60.

The shaft 58 at its outer end carries the hand wheel 61 by means of which the bevel 57 is turned to rotate the screen roll, in the assembling of the parts, but during the operation, the bevel gear 57 is removed from coaction with the bevel gear 22 and drawn completely away therefrom, so that it is quite out of the way during the operation of the dandy roll in paper making.

In the assembling and in the operation of this machine, the cylindrical roll of Wire mesh is mounted on the end flanges which are screwed on to the trunnions, these trunnions being mounted in bearings in the slidable brackets and held securely in said brackets by end thrust bearings.

These brackets are connected by the pistons and cylinders and are slidably mounted on the fixed brackets, consequently when the parts are all assembled, the pistons are operated in the cylinders by means of expansile fluid and the brackets supported to the fullest extent that the screen drum or roll will allow, and in consequence of this the wire mesh is continuously in tension.

The driving bevel gear on the main shaft and the coacting driving bevel gear on the screen insure the rotation of said screen on the wire of the Fourdrinier machine, and as this dandy roll is driven it smooths out the sheet of pulp passing and squeezes out excess water and generally performs all the functions that a dandy roll usually performs, the salient features of this particular dandy roll being the means of maintaining the wire mesh in constant tension and thereby eliminating an interior frame, the means of keeping the wire mesh roll in a cleanly condition, and the means of avoiding the eflects of distortion and driving from one end and the constructional features whereby the roll may be removed for repair and replaced with great facility.

All of these features are very important and may constitute novel elements both in a dandy roll form of machine and in any other screen roll used for other purposes.

That I claim is Y Y 1. In a screen roll, a drum having a cylinder'formed of suitable light material and heads of heavier material, and means for expanding said heads in relation to the drum cylinder. V

2. In a screen roll, a drum having a cylinder of wire mesh and heads of heavier material and means for expanding said heads in relation to the drum cylinder.

3. In a screen roll, a drum having a wire mesh cylinder mounted on end flanges and supported centrally from said flanges, and means for expanding said flanges in-relation tothe drum cylinder.

4. In a screen roll, a drum having a wire mesh cylinder terminating at each end in solidrings suitably supported from a central bearing and means for expanding said rings in relation to the drum cylinder.

5. In a screen roll, a drum having a wire mesh cylinder and solid rings at the ends thereof and gear members supporting said rings and suitably journalled, and means for expanding said rings in relation to the drum cylinder. I

6. In av screen roll,'a drum having a wire mesh cylinder and end flanges, gears secured to said flanges and suitably journalled, coinder formed of wire mesh and heads of I acting gears and shaft mounting suitably journalled, means for driving said drum, and means for expanding said flanges in relation to the drum cylinder.

7. In a screen roll, a cylindrical wire mesh screen having sliding end mountings and means therewithin for expanding said mountings.

8. In a screen roll, a cylindrical wire mesh screen having sliding end mountings and trunnions therefrom, means for driving said screen, and means for maintaining said mountings in an extended position and the screen in tension.

9. In a screen roll, a cylindrical wire mesh screen having solid end flanges, gears secured to said flanges and having trunnions therefrom and forming driving transmission gears having a common shaft mounting suitably j ournalled and avoiding distortion of the roll, a coacting driving gear suitably journalled and driven and means exerting a continuously spreading pressure on said flanges and said gears to maintain said screen in tension.

10. In a screen roll, a cylindrical wire mesh screen having heads of heavier metal in the form of gears and flanges and trunnions therefrom, sliding brackets forming bearings for said trunnions, fixed brackets supporting said sliding brackets and means for exerting an end pull on the roll ends from said sliding brackets and for maintaining said screen in tension.

11. In a screen roll, a cylindrical wire mesh screen having journal members secured to the ends thereof, sliding brackets forming bearings for said journal members, fixed brackets having slideways for said sliding brackets, gear mechanism mounted in said sliding brackets and on said journal members and screen, means for driving said gear mechanisms and means for exerting continuous outward pull on said journal members from said sliding brackets.

12. In a screen roll, a cylindrical wire mesh screen having journal members secured to the ends thereof, bearings for said journal members automatically adjustable and means contiguous to the roll cylinder for exerting con stant tension thereon and coincidently adj usting said bearings.

13. In a screen roll, a cylindrical wire mesh screen demountably secured to journal members, adjustable bearings for said journal members and expansile means for exerting pull on the journal members and for maintaining the screen in tension.

14. In a screen roll, a cylindrical wire mesh screen secured to journal members, bearings slidably mounted, and a cylinder and piston respectively mounted on said bearing and connected to an expansile fluid supply.

15. In a screen roll, a drum having a cylheavier material, pistons operatively con nected to one head and cylinders connected to a suitable'fluid supply and operatively connected to the other head and expanding said drum lengthwise through the endwise expansion of the heads.

16. In a screen .roll, a cylindrical screen, a driving gear at one end thereof, a coacting driving gear, a coacting adjusting gear and operatlng gear mounted in a bracket having a manually operated shaft for withdrawing the adjusting gears from coaction and flange mountings for said screen secured to said coacting adjusting gear in its adjusted position.

17 In a device of the kind described, a screen and means operatively connected with the ends of the screen and exerting a continuous pull thereon in opposite directions While the screen is in operation.

Signed at Quebec this seventeenth day of November, 1928.

JOSEPH LEON BERGERON.

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