US3085503A

US3085503A - Paper machinery

Info

Publication number: US3085503A
Application number: US69748A
Authority: US
Inventors: Lawrence A Moore
Original assignee: Black Clawson Co
Current assignee: Black Clawson Co
Priority date: 1960-11-16
Filing date: 1960-11-16
Publication date: 1963-04-16
Anticipated expiration: 1980-04-16

Description

- April 16, 1963 Filed Nov. 16. 1960 FIG-1 L. A. MOORE PAPER MACHINERY 5 Sheets-Sheet 1 INVENTOR.

LAWRENCE A. MOORE ATTORNEYS April 16, 1963 A. MOORE PAPER MACHINERY 5 Sheets-Sheet 2 Filed Nov. 16. 1960 IN VEN TOR.

LAWRENCE A. MOORE m wl ATTORNEYS I 5 Sheets-Sheet 3 Filed Nov. 16, 1960 4 R E s m m 4 m N Ov R w m m H m c m R M M .L Y ,B My 0% E as E m T mwflds 8 A m2 (8 @2 5: 0000 82.: 5 ms m oE t E April 16, 1963 A. MOORE PAPER MACHINERY 5 Sheets-Sheet 4 Filed Nov. 16. 1960 FIG-8 FIG-9 IN V EN TOR.

LAWRENCE A. MOORE ATTORNEYS April 16, 1963 A. MOORE 3,085,503

PAPER MACHINERY Filed Nov. 16, 1960 5 Sheets-Sheet 5 INVEN TOR.

LAWRENCE A. MOORE ATTORNEYS 3,085,503 PAPER MACHINERY Lawrence A. Moore, Eeloit, Wis, assignor to The BlacktClawson (Ioinpany, Hamilton, Ohio, a corporation of Ohio Fiied Nov. 16, 1969, Ser. No. 69,748 Claims. (Q1. 1(lil90) in the paper making industry where it is often desired to increase or decrease the number of rolling or treating operations by adding or removing some of the intermediate rolls of the calender. It is the usual practice to grind or otherwise to form the bottom or king roll with a fixed crown for the purpose of maintaining a uniform nip between the bottom roll and the roll immediately supported thereon, often called the queen roll. Such a fixed crown, however, is suitable for maintaining a uniform nip only with a given operating pressure or weight, such as with a given number of intermediate rolls supported by the queen roll. The addition or removal of intermediate rolls requires some compensation in the crown of the king roll to effect uniform regulation of the nip.

Another example of the utility of this invention resides in its application to a press section of a paper machine to maintain a uniform nip between the two press rolls over a range of operating pressures, and the invention is especially applicable to the suction pres-s roll of a suction press section. Use of the invention in a press section results in the advantage of uniform water removal from the felt and the newly formed web of paper, and felt life is also increased as a result of maintaining a uniform pressure distribution along the nip.

The invention further includes an arrangement for shifting the high point of the crown longitudinally of the roll. This, along with the principal roll bending mechanism, provides full control of the nip and th distribution of pressure between a pair of treating rolls.

The mechanism of this invention is particularly suited for installation into existing machines with a minimum of modification of the machine or the supporting bed. The roll bending mechanism is self-contained and places no unusual stresses on components outside of the machine requiring special shoring or strengthening. I

It is therefore an object of this invention to provide a self-contained mechanism as outlined above for maintaining a uniform or determinable nip pressure between a pair of treating rolls.

Another object of the invention is to provide an adjustable mechanism as outlined above which is capable of establishing and maintaining a predetermined crown on the lower roll of a pair of treating rolls at the nip with the cooperating upper roll, and also to provide such a mechanism which is capable of effecting longitudinal adjustment of the high point of the crown.

A further object of this invention is to provide a compensating mechanism as outlined above which is applicable to a wide variety of types of treating rolls and the installation of which requires no unusual or additional strengthening or support in the machine bed or the building in which it is housed.

Additional objects and advantages of the invention will be apparent from the following description, the accompanying drawings and the appended claims.

In the drawings 3,085,503- Patented Apr. 16, 1963 "ice FIG. 1 is a somewhat diagrammatic view of an open side calender embodying the present invention;

FIG. 2 is an end view of the king roll in the calender of FIG. 1 viewed from the right of FIG. 1;

FIG. 3 is an enlarged portion of FIG. 1 partially broken away and showing some of the details of the invention;

FIG. 4 is a partially broken away vie-w showing the mechanism for adjusting the longitudinal position of the crown;

FIG. 5 is a fragmentary elevational view, partially in section, of a suction press section incorporating the invention;

FIG. 6 is an end view of the suction roll viewed from the left of FIG. 5;

FIG. 7 is a fragmentary plan View showing the mounting of the save-all pan for the suction roll of FIGS. 5-6;

FIG. 8 is a fragmentary view in side elevation, partly broken away, showing another construction of suction press roll in accordance with the invention;

FIG. 9 is an end view looking from left to right in FIG. 8;

FIG. 10 is an elevational view, looking from right to left in FIG. 11, partly broken away, showing a press roll constructed in accordance with the invention and illustrated in combination with a fragment of a Yankee dryer;

FIG. 11 is an end vie-w looking from left to right in FIG. 10;

FIG. 12 is a view similar to FIG. 3 showing another construction in accordance with the invention of the king roll in a calender stack; and

FIG. 13 is an end view looking from left to right in FIG. 12.

Referring to the drawings, which illustrate preferred embodiments of this invention, a paper calender 10 is illustrated generally in FIG. 1 as including a base frame 11 and a pair of upstanding

roll supporting frames

12 and 13. The base frame 11 is shown as mounted on bed plates 14 and supports a king roll '15 for rotation thereon. A plurality of additional rolls are supported for rotation upon the

vertical frames

12 and 13 with their collective weight supported by the king roll 15. These additional rolls include a queen roll 18 adjacent and in immediate superimposed relation to the king roll 15, and a plurality of removable intermediate rolls .19 supported on the queen roll 18 in suitable bearings 20 on the

frames

12 and 13. The bed plates 14 of the calender .10 are mounted or supported on a concrete base or floor indicated generally at 21.

The king roll 15 may be ground to a truly cylindrical contour, or it may be formed with a crown thereon as best shown in FIG. 3. Such crown of the roll 15 is readily calibrated to provide a uniform nip 22 between the king roll 15 and the queen roll 18 with a given number of the intermediate rolls 19 supported thereon. For example, the crown of the king roll 15 may be such as to provide a uniform nip 22 with the weight of the queen roll 18 and four intermediate rolls 19 thereon. The addition of a greater number of intermediate rolls 19 would have the effect of deflecting the center of the king roll 15 downwardly and may be compensated for by effectively increasing the crown of the roll 15. Similarly, a decrease in the number of rolls 19 has the effect of deflecting the center of the roll 15 upwardly and may be compensated for by effectively decreasing the crown of the roll 15. This invention provides a self-contained mechanism for effecting such an increase or decrease as required to obtain and maintain a desired and preferably uniform nip 22, and it is equally applicable to crowned and straight rolls.

The mechanism of this invention is best shown in FIG. 3 as including a pair of bearing housings or journal boxes 25, one each positioned at each end of the roll 15. A pair of trunnion pins 26 (FIG. 2) mounted in radially extending relation on the housing 25 form means for pivotally supporting each of the housings 25 on the machine bed plate 14 along an axis transverse to that of the roll 15. The trunnion pins 26 are pivotally received in a pair of roll supporting arms 28 extending upwardly on the base frame 11. The roll includes journals 29 of reduced cross section at each end thereof which are rotatably supported within the housings upon a main bearing 30.

One of the main bearings 30 in the housing 25 may be arranged for the absorption of lateral thrust, and the right bearing 30 shown is indicated as being positioned between an annular flange 31 on the journal 29 and an annular retainer 32 on the housing 25 for this purpose. The extreme ends of the journals 29 are further supported for rotation within the housing 25 by pilot bearings 35 which are arranged to carry the bending moments effected by this invention. Access to the

bearings

30 and 35 may be obtained through an end closure cap 36 on the housing 25.

A pair of integral depending

torque arms

40 and 41 form means connected to the housings 25 for effecting roll bending movement thereof about the trunnion pins 26 in the plane containing the axes of the king and queen rolls. The

arms

40 and 41 may be conveniently extended through access openings 42 in the base 21, and the ends of

arms

40 and 41 are interconnected through a suitable force mechanism such as the hydraulic mechanism 45, for effecting limited pivotal movement of the housings 25 within the arms 28 to effect an appropriate deflection of the king roll 15. However, it should be understood that the roll 15 need not have pivotally mounted bearing housings provided that the elasticity in the attachment of the housing to the frame is sufficient to provide for the bending of the rolls therethrough.

The mechanism 45 includes a double acting hydraulic motor with the cylinder 46 connected to the arm 40 by means of a push rod 47 and the piston 50 connected to the opposite arm 41 by means of a push rod 51.

Inlets

52 and 53 are provided in the cylinder 45 for admitting hydraulic fluid to either side of the piston 50' for effecting relative movement of the piston 50 and cylinder 46 in either direction, as desired. This has the effect of bending the king roll 15 about its longitudinal-axis 55 through the rocking movement of the housing 25 on the pins 26, to increase or decrease the effective crown or curvature of the upper surface subject to the pressure of the

superimposed rolls

18 and 19. This bending movement effected by the mechanism 45 is illustrated in ex aggerated form by the positions of the center line 55 in FIG. 3.

Since the mechanism 45 forms a closed loop with the arms 40-41 and the roll 15 for effecting deflection of the roll, no outside reinforcing members are required, and the invention is adapted for incorporation with existing rolling machines with a minimum of modification of the foundation or other supporting structure. It is within the scope of this invention to provide a king roll 15 with a maximum crown formed thereon for the accommodation of the maximum number of intermediate rolls 19, and then to deflect the arms 40 in one direction only, that is outwardly, to decrease the effective crown thereof. It is further within the scope of this invention to grind the king roll 15 straight and to effect all of the crowning necessary by means of the mechanism 45, or to grind any intermediate crown desired and accommodate superimposed rolls by suitable deflection.

Means may be connected to the arms 40'for effecting simultaneous lateral displacement thereto to shift the high point or apex of the crown longitudinally along the king roll 15, for example where uneven loadings would otherwise result in an uneven nip 22 which is not totally compensated for by means of the mechanism 45. Referring to FIG. 4, an auxiliary hydraulic motor includes a cylinder 61 attached to a fixed wall member 62 by a bracket 63. A piston 65 is connected to actuate the

arms

40 and 41 together by a push pin 66 threaded into an extended end 67 of the push rod 47. A pair of hydraulic

fluid inlets

68 and 69 positioned on opposite sides of the piston 65 provide means by which a lateral force may be applied to the

arms

40 and 41 through the mechanism 45 to effect a longitudinal displacement of the apex of the crown on the roll 15, as necessary, to achieve the desired nip 22.

A suitable hydraulic system for applying hydraulic pressure to the cylinder 46 of the mechanism 45 and to the motor 60 to obtain and maintain a uniform nip 22 is shown somewhat diagrammatically in FIG. 3. The mechanism includes a tank or reservoir of hydraulic fluid 70 and a hydraulic fluid pump 71 connected to supply hydraulic fluid under pressure from the tank 70 to a variable pressure regulating valve 72. The valve 72 is connected to supply hydraulic fluid at a variable regulated pressure to one of the

inlets

52 and 53 of the cylinder 46 through a four-way selector valve 74 which also vents the unused one of the inlets 52-53 to the tank 70. With this hydraulic system, a desired pressure can be established and maintained on the piston 50 to provide a desired bend in the roll 15 in the manner described. Similarly, the effective longitudinal position of the apex of the crown is controlled by the motor 60 through a regulating valve 76 and a four-way selector valve 77 respectively similar to the

valves

72 and 74.

FIGS. 5-7 illustrate the application of the invention to the suction roll in a suction press section of a paper machine. The suction roll indicated generally at is shown in FIG. 5 partially in section with a fragment of a crownless upper press roll 101. The suction roll 100 includes a perforated metal shell carried by end heads 106 and 107, and it has a perforated rubber cover 108 forming the outer surface thereof. A felt 110 for supporting a newly formed web of paper is shown as passing between the

rolls

100 and 101, and the return run of the felt is indicated fragmentarily at 110 in the lower portion of FIG. 5.

FIG. 6 shows a fragment of a suction box of conventional construction within the shell 105, and it includes the usual axially extending seals 116 which engage the inner surface of the shell 105 to limit the effective suction area of the roll. FIG. 5 shows a mounting for the suction box 115 for angular adjustment in the usual way, one end of the suction box being carried by a stub shaft 117 in bearings 118 in the end head 106, and the other end being carried by a tubular shaft 120 which projects through the head 107 and carries a worm gear 121 meshing with an adjusting drive worm 122. FIG. 5 also indicates at 123 the adjusting mechanism for the usual deckles (not shown) within the suction roll 100.

A pair of journal boxes or bearing housings 125, similar to the boxes 25, are positioned at opposite ends of the roll 100, and each includes a pair of outwardly extending trunnion pins 126. The pins 126 are each pivotally received and supported in one of a pair of

yokeshaped trunnions

127 and 128 at the opposite ends of the roll. The trunnion 127 is shown as equipped with a removable supporting block 129 which is removed for replacement of the felt 110, during which operation the left hand end of the roll may be supported in the usual way by a crane or the like.

The journal boxes each include a depending torque arm 130 by means of which the roll 100 may be flexed in the plane containing the axes of the two

rolls

100 and 101. The arms 130 are interconnected similarly to the

arms

40 and 41 by a pair of links or

rods

131 and 132 and a hydraulic cylinder 135 in the same manner as described for the cylinder 45, and the cylinder 135 may be provided with a control system of any suitable type such as that shown in FIG. 2 for the cylinder 45.

F 3 It will be noted that the rods 131132 pass through holes in the

trunnions

127 and 128 above the return flight of the felt 110 to facilitate replacement of the felt.

In the operation of the invention as illustrated in FIGS. and 6, preferred results are obtained when the hydraulic cylinder 135 is operated to draw the arms 130 towards each other and and thereby to apply an upward flexing moment to the roll 100. More specifically, and particularly when the upper press roll is of the crownless construction shown, preferred results are obtained when the flexing moment is of just sufiicient force to effect accurate straightening of the shell 105, namely to counteract the tendency for the central portion of the shell to be deflected downwardly at its nip with the roll 101.

The arrangement just described provides two major operating advantages. Thus not only does it provide a nip of uniform width throughout the entire length of the roll, but it also provides a uniformly straight inner surface of the shell 105 in the area which is in running engagement with the suction box seals 116. As a result, the suction is more nearly uniform throughout the entire width of the roll, and also the service life of the seals is correspondingly extended. Additionally, the removal of moisture from the paper web is effectively uniform across its entire width, and also wear of the felt is rendered uniform with the result that its service life is substantially extended.

It is also desirable in accordance with the invention to equip the apparatus of FIGS. 5-7 with an auxiliary hydraulic motor arranged like the motor 60 in FIGS. 3 and 4, as indicated fragmentarily at 138 in FIG. 5. This auxiliary motor makes it possible to shift the apex of the applied load axially of roll 1% and thereby to control wet streaks in the paper web which are not uniform across the paper machine. Thus the cylinder 135 will control the entire roll 100, the auxiliary cylinder 138 will control the location of the apex of the force applied to the roll by the cylinder 135, and any additional desired control can be effected by unbalancing the novel loading means (not shown) for the top roll 161. This combination will therefore provide control for all practical purpose across the entire width of the web.

FIGS. 5-7 show the suction roll 1% as equipped with a save-all pan 140, which is located above the rods 131132 and cylinder 135 to facilitate replacement of the felt. This save-all pan 140 contributes to operation of the roll flexing mechanism by serving as the tension and compression member between the support trunnions 127 and 128. The pan 140 should therefore be of substantially heavier construction than would otherwise be required, in order to support these tension and compression loads, and it may advantageously include means such as the angles 1411 and 142 and connecting plate 143 for attachment to the trunnion supports 127 and 128 as shown in FIGS. 6 and 7. These details are subject to design revision in accordance with convenience and the specific loads to be supported in a given installation.

It is not necessary in the practice of the invention to employ a pivoted trunnion mounting for the bearing housings of the roll to be bent, and this is illustrated in FIGS. 8 and 9 showing a press roll construction in accordance with the invention which is otherwise similar to the construction shown in FIGS. 5-7. Thus, in FIG. 8, the suction roll 150 corresponds to the roll 166, and its

heads

151 and 152 are each mounted by a pair of bearings 153 in bearing

housings

155 and 156. These journal boxes are in turn mounted on end cfrarnes 160 and 161 which may have arcuate supporting surfaces 162 on their upper ends which are shown as provided with removable wear plates 163 forming retaining seats for the bearing

housings

155 and 156.

The bearing

housings

155 and 156 are provided with depending

arms

165 and 166 respectively. A fluid pressure cylinder 170 is mounted on the arm 165, and its piston rod 171 is connected by a link 172 with the arm 166 to produce the desired movement of the arms and 166 toward and away from each other and thereby to effect controlled bending of the roll 150. During such movements, the

journal boxes

155 and 156 are free to rock on the wear plates 163, which may be of straight section as shown, or may be slightly curved in the manner of a spherical bearing. {The position of the high point of the crown of roll 150 may be shifted as described in connection with FIGS. 1 and 4 by means of a second pressure cylinder 175 which is also mounted on the arm 165 and has its piston rod 176 connected at 177 to the end frame 160.

FIGS. 10 and 11 illustrate the application of the invention to the press roll 180 which cooperates with a Yankee dryer drum 181 to effect firm contact between the drum and the web carried thereto by a felt 182 running over one or more guide rolls 183, and which may be either a plain press roll or a suction press roll. The bearing housings 185 and 186 for the roll 18!) correspond in structure and function to the

housings

155 and 156, and they rest in a pair of arms 187 which are in turn pivoted at 188 on columns 189 located adjacent either end of the dryer drum 181. Jack cylinders 190 are connected as shown to raise and lower the arms 187 and thereby to control the nip pressure between the roll 180 and drum 181.

.The press roll 18!) is provided, in accordance with the invention, with means for varying its crown in a manner similar to that described in connection with the other rolls in FIGS. l-9. Each of the bearing housings 185 and 186 includes a depending arm 195, and a pressure cylinder 1% is mounted on one of these arms and has its piston rod 197 connected by a link 198 with the other arm 195. As the cylinder 196 is operated to move the arms 155 toward or away from each other, the bearing housings 185 and 186 are caused to rock in the arms 187, the supporting connection between each bearing housing and its associated arm being similar to that between the

housings

155 and 156 and the end frames 160 and 161.

FIGS. 12 and 13 show a mounting for the king roll 2% of a calender stack which is in all material respects the same as the arrangement shown in FIGS. 1-3, except that the bearing housings 202 for the roll journals are mounted in cradle-like supports 205 in which they are free to rock as required in the practice of the invention in the same manner as described in connection with FIGS. 8-11. This controlled rocking is effected through the arms 205 which depend from each bearing housing and are connected through the link 206 which is pivoted to one of the arms 205 and has its other end connected to the piston rod of a fluid pressure cylinder 207 mounted on the other arm 2-65. One or the other of the arms 205 may also be provided with a connection to a second cylinder similarly to and for the same purpose as described in connection with the cylinder 60.

rWhile the forms of apparatus herein described constitute preferred embodiments of the invention, it is to be understood that the invention is not limited to these precise forms of apparatus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. In a rolling machine having a pair of rolls operating together under pressure, a mechanism for effecting controlled crowning of one of said rolls and longitudinal position shifts of the apex of such crown, comprising a lever arm extending from each end of said crowned roll and connected thereto to effect longitudinal bending moments therein, means connecting the ends of said arms for movement in the same direction, and means connected to effect said movement of said arms to effect a longitudinal shift in the apex of said crowned roll.

2. In a rolling machine having a crowned roll and a second roll operating together under pressure, a mech- 7 anism for effecting longitudinal position shifts of the apex of the crown in said crowned roll, comprising a lever arm extending from each end of said crowned roll and connected thereto to effect longitudinal bending moments therein, means connecting the extended ends of said arm one to the other for movement together, and

and away from each other to effect a bend in said one roll in the plane containing the axes of said pair of rolls, and an auxiliary hydraulic motor connected to efiect simultaneous movement of said arms through said first motor to shift said bend longitudinally of said one roll.

4. Mechanism for regulating the nip between a pair of treating rolls, comprising a pair of journal boxes rotatably supporting opposite ends of one of said rolls, means mounting said boxes for pivotal movement about an axis transverse to said one roll, a pair of lever arms connected to said boxes respectively for effecting said pivotal movement thereof, a first double acting hydraulic motor interconnecting said lever arms for effecting relative movement thereof toward and away from each other to effect a bend in said one roll in the plane containing the axes of said pair of rolls, and an auxiliary double acting hydraulic motor connected to effect simultaneous movement of said arms through said first motor to shift said bend longitudinally of said one roll.

5. A calender comprising a bottom king roll having a queen rolland a plurality of removable intermediate rolls supported thereon, said king roll having a crown formed therein of sufficient height to provide a uniform nip between said king and queen rolls with a given number of said intermediate rolls supported thereon, means for flexing said king roll in a direction to increase and decrease said crown to accommodate greater and fewer numbers respectively of said intermediate rolls including a pair of journal boxes rotatably supporting opposite ends of said king roll, means mounting said boxes for pivotal movement about an axis tnansverse to said king roll, a pair of lever arms connected to said boxes respectively for effecting said pivotal movement thereof, a double acting hydraulic motor interconnecting said lever arms for effecting relative movement thereof in a direction to increase said crown to accommodate a greater number of said intermediate rolls and in the opposite direction to decrease said crown to accommodate a fewer number of said intermediate rolls whilelmaintaining said uniform nip, and means connected to said arms for effecting simultaneous lateral displacement thereof to shift the apex of said crown longitudinally of said king roll.

6. A suction press section comprising a suction roll, a press roll cooperating with said suction roll to define a nip for processing a newly formed web of paper therebetween, means for flexing said suction roll to maintain a predeterminedpressure distribution along the length of said nip including a pair of journal boxes rotatably supporting opposite .ends of said suction roll, a pair of lever arms connected to said boxes respectively for effecting a bending moment in said suction roll upon relative movement thereof, means interconnecting said lever arms for movement toward and away from each other to effect said bending moment therethrough in said suction roll, and means connected to cause controlled movement of said arms in the same direction and thereby to effect a shift in the apex of said bending moment longitudinally of said suction roll.

7. In a machine including a pair of treating rolls operating together under pressure, the combination of frame means including a pair of end stands for supporting said rolls, bearing means journaling opposite ends of one of said rolls and including a single bearing housing at each end of said roll, means supporting said housings directly on said end stands for limited rocking movement in the vertical plane containing the axis of said one roll in such manner that the weight of said roll is transferred through said rockable housings to said end stands, a lever arm extending generally radially from each of said bearing housings, and means including a motor operatively interconnecting said lever arms to effect relative movement thereof in said vertical plane causing bending of said one roll in said plane.

8. In a machine including at least two treating rolls operating together under pressure, the combination of frame means including a pair of end stands for supportsaid rolls, bearing means journaling opposite ends of one of said rolls and including a single bearing housing at each end of said roll, at least one additional roll supported on said one roll, means supporting said housings directly on said end stands for limited rocking movement in the vertical plane containing the axis of said one roll in such manner that the weight of all of said rolls is transferred through said rockable housings to said end stands, a lever arm extending generally radially from each of said hearing housings, and means including a motor operatively interconnecting said lever arms to effect relative movement thereof in said vertical plane causing bending of said one roll in said plane.

9. A multi-nip calender comprising a calender frame, a stack of calender rolls in the frame including a bottom roll and a plurality of superimposed rolls including a top roll all in a generally vertical plane, allochiral pairs of bearings rotatably carrying the ends of the bottom roll, fixed pivots on said frame mounting each of said pairs of bearings, allochiral lever arms rigid with each of said pairs of bearings and extending therefrom to terminate generally in the plane of the superimposed stack of rolls, and means for acting on the terminal portions of each of said lever arms and applying a bending moment to each such roll end to effect a predetermined deflection in the roll axis and a predetermined loading across the calender rnps.

10. In a mounting for a roll whose axis is subject to deflection, said roll having shaft elements at opposite ends thereof and being mounted in a calender stack disposed in a generally vertical plane, in combination, allochiral pairs of bearings rotatably receiving said shaft elements and adapted to apply a force couple thereto, fixed pivots mounting each of said pairs of bearings, allochiral lever arms each rigid with one of said pairs of bearings and extending therefrom in said vertical plane away from the stack, and means for acting on the terminal portions of each of said lever arms generally in the plane of the stack to apply such force couple to said shaft elements,

References Cited in the file of this patent UNITED STATES PATENTS 2,191,144 Hornbostel Feb. 20, 1940 2,611,150 Goulding Sept. 23, 1952 2,825,217 Byrd Mar. 4, 1958 2,850,952 Hornbostel Sept. 9, 1958 2,897,538 Shapiro et al. Aug. 4, 1959 FOREIGN PATENTS 747,347 Great Britain Apr. 4, 1956

Claims

7. IN A MACHINE INCLUDING A PAIR OF TREATING ROLLS OPERATING TOGETHER UNDER PRESSURE, THE COMBINATION OF FRAME MEANS INCLUDING A PAIR OF END STANDS FOR SUPPORTING SAID ROLLS, BEARING MEANS JOURNALING OPPOSITE ENDS OF ONE OF SAID ROLLS AND INCLUDING A SINGLE BEARING HOUSING AT EACH END OF SAID ROLL, MEANS SUPPORTING SAID HOUSINGS DIRECTLY ON SAID END STAND FOR LIMITED ROCKING MOVEMENT IN THE VERTICAL PLANE CONTAINING THE AXIS OF SAID ONE ROLL IN SUCH MANNER THAT THE WEIGHT OF SAID ROLL IS TRANSFERRED THROUGH SAID ROCKABLE HOUSINGS TO SAID END STANDS, A LEVER ARM EXTENDING GENERALLY RADIALLY FROM EACH OF SAID BEARING HOUSINGS, AND MEANS INCLUDING A MOTOR OPERATIVELY INTERCONNECTING SAID LEVER ARMS TO EFFECT RELATIVE MOVEMENT THEREOF IN SAID VERTICAL PLANE CAUSING BENDING OF SAID ONE ROLL IN SAID PLANE.