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May 22, 1962 E. D. BEACHLER 3,035,512 FLEXIBLE NIP LOADING ARRANGEMENT Filed May 19, 1958 s Sheets-Sheet -1 F1 57' 1 F4 q. é 274' .Z 42 43 \\ 51 , \_ 52 :3 54 Maria? Edward D. Beach [er Z: 777 w mm“. ;""’"”'é"’“”H’ :2 7735 ' May 22, 1962 E. ‘D. BEACHLER 3,035,512 FLEXIBLE NIP LOADING ARRANGEMENT Filed May 19, 1958 / 6 Sheets-Sheet 2 /////////////////, ///// ' 137 l i \l \ I ,\/ / %/ v v i ‘ Edward‘ D. Beach /ez"‘ W 9””'42,“,59212775 May 22, 1962 E. D. BEACHLER ; 3,035,512 FLEXIBLE NIP LOADING ARRANGEMENT Filed May 19, 1958 6 Sheets-Sheet 3 I251) 101 b% he EZQ 2'" Edward D. Beach/gr H ZLZ‘ May 22, 1962 E. D. BEACHLER 3,035,512 FLEXIBLE NIP LOADING ARRANGEMENT Filed May 19, 1958 6 Sheets-Sheet 4 I I I24- I _ LUKE :EZUT I May 22, 1962 3,035,512 E. D. BEACH LER FLEXIBLE NIP LOADING ARRANGEMENT Filed May' 19, 1958 ' e Sheets-Sheet 5 be 21-02” Edward D. Beach/er W ‘ ' 5.7271775 May 22, 1962 E. D. BEACHLER 3,035,512 FLEXIBLE NIP LOADING ARRANGEMENT Filed May 19, 1958 6 Sheets-Sheet 6 ENQNN he ILZUT Ea‘ararz/ ?. Beach/er r 9;; United States Patent Office 1 3,@35,5l2 Patented May 22, 1962 2 volving the use of laterally spaced pairs ‘of opposed 3,035,512 rollers for backing a nip-de?ning roll. Each of such pairs of opposed rollers is resiliently urged against the back FLEXIBLE NIP LOADING ARRANGEMENT Edward D. Beachler, Beloit, Wis., assignor, by mesne as of one of the nip-de?ning rolls. The resilient means thus act through the associated pair of rollers to load one nip de?ning roll directly against the other and no means are provided for maintaining a desired space between the signments, to Clupak, Inc., New York, N.Y., a corpo ration of Delaware Filed May 19, 1958, Ser. No. 736,161 3 Claims. (Cl. 100-160) nip-de?ning rolls. It will be appreciated that, the in The instant invention relates to apparatus for applying stant invention provides an arrangement whereby spac pressure to a traveling ?exible element, and more par 10 ing between the nip-de?ning surfaces may be maintained to a predetermined extent independently of the actual ticularly, to a controlled ?exible nip loading arrange loading pressure applied. In this way, the desired spac ment. The application of pressure to a traveling ?exible ele ing may be maintained across the full lateral dimension of the nip, even though hydraulic forces or the like in ment passing between opposed nip-de?ning surfaces (such as may be presented by opposed pressure rolls) is em 15 the ?exible element passing through the nip may resist ployed in a number of arts. For example, nip-de?ning nip loading to a greater extent, for example, in the cen tral portion of the nip than at the edges. Irregularities pressure rolls are used to squeeze moisture from textiles in forces resisting nip loading within the traveling ?exible or paper traveling therebetween; and in such arrange ments control is provided essentially for the actual load element may also be created by varying the actual spac ing pressure at the nip. In the case of “doctor” nips in 20 ing of the nip across the lateral dimension thereof. The instant invention also provides for such variation in the coating devices for textiles or paper, the loading pres actual spacing across the lateral dimension of the nip sure is controlled and also the space between the nip and the use of nip loading pressures in conjunction with de?ning surfaces involved must be controlled. Such such spacing to maintain the predetermined spacing across space must be sui?cient to permit not only the fabric but a layer of coating thereon to pass through the nip. Con 2 Ul the width of the nip in spite of irregularities or differences in the forces within the traveling ?exible element which trol of this space merely by control of the actual load ing pressure is often inadequate. Although the instant invention may have application in any of the nip loading arrangements hereinbefore contemplated, it is particularly useful in connection with 30 the art of making extensible paper and it will be de scribed primarily in connection therewith. In the art of making extensible paper there has just been developed resist nip loading. The instant invention provides for laterally spaced members engaging one of a pair of nip-de?ning means for nip loading purposes. Such members are each pro vided with independent ?uid pressure actuated means for applying the loading force and adjustable stop means for maintaining the desired spacing at the nip. In addi tion, such members are pivotally mounted to permit limited movement toward and away from the nip and limited tilting movement along an axis extending longi of a heated roll. At approximately the point at which tudinally in the direction of travel of the traveling ?exi the paper web covered by the blanket engages the heated ble element passing through the nip. Such tilting move roll, a backing member de?nes a press nip with the ment provides for better alignment between the indi heated roll so as to squeeze the rubber blanket in a pre determined manner. During the remainder of its travel vidual spaced members and the nip-de?ning roll backed 40 thereby. over the speci?ed peripheral area of the heated roll, the squeezed rubber blanket returns to its original size and It is, therefore, an important object of the instant shape with the result that the portion of the paper Web invention to provide an improved nip loading arrange an arrangement wherein a resilient blanket is urged against a paper web over an extensive peripheral area 35 ment. covered thereby on the previously selected peripheral area of the roll is subjected to longitudinal compacting 45 It is another important object of the instant inven or compression. The instant invention is concerned pri tion to provide apparatus comprising a pair of means marily with the nip loading arrangement for such back presenting opposed nip-de?ning surfaces for pressing a traveling ?exible element passing therethrough, laterally ing roll which permits a rather substantial amount of space between the backing roll and the heated roll sur spaced members engaging one of said pair of means, ?uid face so that an appreciable thickness of the rubber blanket pressure actuated means acting on each of said mem may pass through the nip. On the other hand, the in bers to urge said one of said pair of means toward stant nip loading arrangement permits the application the other, and separate adjustable stops operatively con of substantial pressure to the blanket at the nip. nected with each of said ?uid pressure actuated means to limit the movement of said one of said pair of means toward the other. ' In the instant device, and in a number of other nip loading arrangements, it has been found desirable to employ a backing roll (as one of the two nip-de?ning 55 Other and further objects, features and advantages of rolls) of relatively small diameter. This results in the the present invention will become apparent to those skilled formation of a nip having a minimum peripheral dimen in the art from the following detailed disclosure thereof sion. Such a nip more accurately applies the precise and the drawings attached hereto and made a part hereof. loading pressure desired. The use of a roll of relatively On the drawings: small diameter, however, results in a tendency for this FIGURE 1 is essentially a diagrammatic side elevation roll to bend generally in the plane in which the nip al view of an extensible paper making apparatus including loading pressure is applied (i.e., the plane containing the axes of both the nip-de?ning rolls). Also, nips of this the nip loading arrangement of the instant invention; FIGURE 2 is a fragmentary essentially diagrammatic type have an extensive lateral dimension (laterally with front elevational view taken from the right hand side of 65 respect to the direction of travel of the ?exible element FIGURE 1; _ t 1 . passing through the nip), so that liquids such as‘ mois~ ture or lubricants employed may actually develop by hydraulic forces in the central portion of the nip so that much greater loading pressure is required to maintain a FIGURE 3 is a detail sectional elevational view of a nip loading arrangement embodying the instant invention; FIGURE 4 is a front elevational view taken from the 70 right hand side of FIGURE 3; FIGURE 5 is a sectional elevational view taken sub In Canadian Patent No. 546,471, issued to Appen predetermined space between the nip-de?ning rolls. zeller, there is described a nip loading arrangement in stantially along the line V--V of FIGURE 3; 3,035,512 3 FIGURE 6 is a detail sectional elevational view show ing the mounting of the centering pin (shown in full eleva tional view) in FIGURES 3 and 4; FIGURE 7 is a side elevational view of another nip loading arrangement embodying the instant invention; and FIGURE 8 is a detail elevational view of one of the nip-de?ning members of the embodiment of FIGURE 7, showing the same partially in full elevation and partially in section. As shown on the drawings: In FIGURES l and 2 there is shown diagrammatically a device, indicated generally by the reference numeral 10, A a sleeve 104 by lock nuts 105 and ‘106 and the sleeve 104 is mounted on a frame element 107 suitably secured to bearing housings 108a and 10901 formed in an arm 110. As will be noted’from FIGURE 4, opposed bearing housings 1109a and 109cc’ rotatably mount a backing roller v109 which engages the back side of the press roll.101. Directly behind the bearing housings 109a and 109a’ in the position of FIGURE'4 there are opposed bearing housings for a second roller 108; and the position of the 10 roller 108 and one of the bearing housings 108a is shown in FIGURE 3. The bearing housings 108a and 109a are formed in one arm 110 and the opposite bearing housings are formed in a second arm generally symmetrical in con for making extensible paper. The device 10 comprises a ?guration to the arm v110 shown only partially at 110' in resilient endless rubber blanket 11 mounted on guide rolls 12, 13, 14, 15 and 16. The rubber blanket '11 passes 15 FIGURE 4. The arm 110' does not have a frame ele— ment 107 and centering pin 103 mounting, but such a through a nip N-1 de?ned by a ?rst cylinder 17 rotatably mounting is provided at the opposite end of the press roll mounted on, hearing means 17:: and a second cylinder 18 1101. This general position of the centering pins is in mounted on ?xed bearings 18a. The blanket 11 is held dicated diagrammatically in FIGURE 2, wherein it will against the second cylinder or roll 18 over a substantial peripheral area 18b extending from the ?rst cylinder or be noted that centering pins P and P’ are connected to nip roll 17 to a second roll 15; and a paper web W is opposite bearing housings 17a, 17a for the top roll 17. Referring to FIGURE 6, it will be noted that the center guided into contact with the surface of the roll 18 just ing pin 103 is received by the sleeve 104 mounted on the before the nip N-l and is held against the surface of the frame element 167, but a resilient elastomer sleeve 111 roll 18 until the rubber blanket turns around the guide roll 15. The rubber blanket 11 is squeezed or compressed 25 is interposed between the frame sleeve 104 and the centering pin 103 so as to permit relatively slight tilting at the nip N-l and it gradually returns to its normal size movement of the pin 103 in the sleeve 104. Also, an and shape as it passes over the peripheral area 18b to elastomer washer 112 is clamped against the frame sleeve ward the guide roll 15. The main press roll 18 is heated 104 by a metal washer 113 held in place by the top lock and the moisture in the paper Web W subjected to the heat from the roll 18 a?ords some lubrication so that the 30 nut 105; and another elastomer washer 114 is clamped against the bottom of the frame sleeve 104 by a metal web W is longitudinally compressed as it passes over the Washer 1115 held in position by the lower lock nut 106. peripheral roll area 1812. The washers 112 and 114 as'well as the elastomer sleeve A plurality of members 20, 21, 22, 23 and 24 (FIG 111 are formed of relatively hard rubber so that they URE 2) are spaced across the width of the nip N-l. As indicated in FIGURE 1, the ?rst member 20 comprises 35 yieldingly hold the centering pin 103 in position, but they do permit a relatively limited amount of tilting movement a pair of opposed rollers 20a and 2% which engage the of the pin 103 (with only a negligible amount of relative back side of the cylinder 17. The same is true of the axial movement between the pin 103 and the frame sleeve members 21, 22, 23- and 24. The bearings of the rollers 104). The purpose of this mounting for the pin 133 is to 20a and 20b are carried by an arm 20c connected to a ?xed pivot 20d at one end thereof, for swinging the rollers 40 permit slight shifting of the bearing housing 102 ‘and thus the roll 101 relative to the backing rollers ‘10S and 109 20a and 20b about an axis aligned with the pivot 20d ' during the relatively slight movement ‘of the arm 110. and parallel to the line of the nip N—1. At‘the opposite As will be appreciated, the arm 110 is moved slightly so end of the arm 200 there is a pivot 20c movable with the as to adjust the space S between the rolls 101 and ‘100 arm 200. As shown in FIGURE 2, each of such pivots Me, 212, 22c, etc. is connected to a yoke 30, 31, 32, 33 45 and the movement of the arm 110 will be described in detail hereinafter. This slight movement of the ‘arm 110, and 34, respectively. A separate ?uid actuated means 40, however, tends to change slightly the alignment of forces 41, 42, etc. is connected to each of said yokes 30, 31, 32, between the backing rolls 10S and 109 and the press roll by means of pivots 50, 511, 52, etc. so as to permit limited 101 and the resilient mounting for the centering pin 103 relative tilting movement between the ?uid pressure actu compensates automatically for the slight shifting in the ated means or diaphragms 40, 41, 42, etc. and the yokes position of the roll ‘101 relative to the positions of the 30, 31, 32, etc. about an axis aligned with the pivots 50, rolls 108 and 109. It will be appreciated that the center 51, 52, etc. and longitudinally aligned in the direction of ing pin 103 is locked to the bearing housing 102, so that travel of the blanket 11 passing through the nip N~1. the roll 101 will be retained in position, during removal As shown in FIGURE 1, adjustable stop means 60 are provided for each pressure actuated element or diaphragm 55 of the blanket B-l, or similar major adjustments in the parts here involved. 40, so that the downward thrust of the fluid pressure actu ated means 40 is limited, thus in turn limiting the actual Referring now to FIGURES 3 and 5, it will be seen spacing between the cylinders 17 and 18 at the nip N-l. . that the arms 110 and 110’ are mounted at one’ end on a The details of the adjustable stop means 60pwill be de ?xed pivot indicated generally at 120. The extremities scribed hereinafter. 60 121 and 121’ of the arms 110 and 110’ are formed into Referring now to the speci?c embodiment of FIGURES sleeves which, in turn, receive opposite extremities 122 3, 4 and'S, it will be seen that a large roll 100 is shown and 122' of a pivot pin 123. The sleeve 121 is secured to only fragmentarily in FIGURE 3 with a nip-de?ning sur the pin extremity 122 by a washer 124 clamped there face 100:: opposite a nip-de?ning surface 101a of a sec against by a lock nut 125; and the corresponding ele ond roll 101. The nip N-2 receives a traveling ?exible 65 ments indicated in primed reference numerals are em element in the form of a rubber blanket B-1 and a paper ployed to retain the sleeve 121' to the opposite end of the web W-2. The space S between the nip-de?ning surfaces pin 123. A recessed central portion 123a of the pin 123 100a and 101a is slightly less than the thickness of the is rotatably received in a ?xed sleeve 126 formed at the blanket B-1, so that the blanket B-'1 is squeezed at the nip bottom of a depending frame element 127 secured to the 70 N-2. . bottom of a main box frame 128 (FIGURE 3) for the nip As shown in FIGURES 3 and 4, the roll 101 is rotatably loading device. The main box frame 128 is suitably se mounted on bearings within housings 102, 102 at opposite cured to a ?xed structure such as the ?oor of a building ends of the roll 101. The bearing housing 102 has a (not shown). The pin 123 rotates in the sleeve 126 and is threaded socket 102a at its top which threadedly receives a centering pin 103. The centering pin7103 is locked in 75 also permitted limited tilting movement so that the rollers 3,035,512 108 and 109 may follow the contour of the press roll or _ cylinder 101. The arms 110 and 110’ are thus pivotally mounted 6 the pressure applied to the diaphragm 137 will not cause a decrease in the space beyond the predetermined set sumed to de?ne a “line of contact” between the rolls 100 ting which is controlled by the actual position of the ad justable saddle 149. Also, it will be noted that the rounded surface of the lever foot 148 engaging the saddle 149 permits the free adjustment of the assembly at such and 101 extending laterally of the instant device and pivot points as the pivot pin 135 and the pivot pins 130 lying in the same plane with the axes of the rolls 100 and and 130’. about the axis of the pin 123, which is generally parallel to the line of the nip N~2. The nip N-2 is theoretically pre 101, notwithstanding the fact that the rolls 100 and 101 The saddle or stop pad 149 is mounted for vertical ad are actually spaced apart the small distance S. 10 justment by axial movement of a stop screw 150 which, in In FIGURE 3 it will be noted that the bearing hous ing 109a at the right hand extremity of the arm 110 mounts a pivot pin 130. As shown in FIGURE 4, pivot pins 130 and 130' are mounted at opposite ends at the top turn, is driven by a worm box 151 in a manner well known per se. The worm box 151 comprises a worm mounted for rotation on a shaft 152 driving 'a worm gear which is in the form of a sleeve with its interior threaded of ‘the bearing housings 109a and 109a’. The pivot pin 130 15 ly engaging the stop screw 150 for relative axial move is received at its opposite ends by a bifurcated pivot sleeve 131 which, in turn, is locked by a threaded bolt 132 to ment. The Worm and worm gear are well known struc tures which do not require further description herein, but one extremity 133 of a yoke 134 extending across the top it is su?'icient to note that rotation of the shaft 152 results in axial movement of the stop screw 150. Such rotation may be effected merely by the use of a ?exible shaft (not shown) connected at a coupling 153, or it may be accomplished by the use of an air clutch indicated generally at 154. The use of a ?exible shaft connected 130 and 130’ move with the arms 110 and 110'. to the coupling 153 is a well known expedient and the The central portion of the yoke 134 is connected 25 terminal end of the ?exible shaft is mounted at a control through a pivot pin 135 to an upwardly extending thrust panel whereat it is connected to a counter for indicating rod 136 which in turn, is connected to a diaphragm assem the number of revolutions of the shaft 152 and thus the of the I011 109. A similar mounting is provided at the opposite end of yoke 134 with comparable parts indicated by the primed reference numerals. The pivot pins 130 and 130' are thus axially aligned along an axis that is also parallel to the line of- the nip N—2, but the pivot pins bly indicated generally at 137. The diaphragm assembly ultimate position of the saddle or stop pad 149. The air 137 and thrust rod 136 are actually protected by a housing clutch 154 ‘is ‘also ‘a well known structure. 138 indicated in FIGURE 3, but omitted from FIGURES 30 In this particular air clutch structure 154 a shaft 155 4 and 5. The housing 138 extends downwardly from a is rotated in either direction by ‘an appropriate air motor top frame element 128a’ and the diaphragm assembly (not shown). The shaft 155 is mounted on bearings 156 137 is secured to the top frame element 128a and acts (FIGURES 4 and 5) and 157 (FIGURE 4 only). Also against the frame element 128a to raise and lower the it will be noted that a coupling 158 shown in FIGURE 4 yoke 134. It will be appreciated that the pivot pin 135 35 is omitted from FIGURE 5. The shaft 155 mounts a interconnecting the yoke and thrust rod 136 is adapted to gear 159 which meshes with ‘another gear 160 connected permit limited tilting of the yoke 134 about an axis extend through the shaft 161 to the air clutch expandable mem ing longitudinally in the direction of travel of the blanket. ber 162. Air is fed selectively through the shaft 161 The diaphragm assembly 137 comprises a dish-shaped (for example, through a connection 163 of FIGURE 4) top member 139 secured to the frame element 12811, a and 'into the expandable member 162 which engages the ?exible diaphragm element 140 peripherally clamped to clutch 154 by expanding against an annular member 165 the dish-shaped member 139 by an annular clamp 141, corotatably mounted on the worm shaft 152. By engag and the thrust rod 136 having an upper ?ange 136a se ing the clutch 154 in the usual manner rotation of the cured to the ?exible diaphragm element 140 by a disk worm is effected and movement of the stop screw 150 s’naped clamp 13612. A plurality of air hoses indicated at results. As mentioned, this type of drive mechanism is 45 142 are carried by the frame 128 and each supplies air to a well understood in the art and need not be described in separate diaphragm assembly 137 (as indicated diagram further detail herein, because it does not form a part matically at 142a). The air pressure in the diaphragm of the instant invention. An aspect of the instant inven 137 is controlled so that the desired amount of force is tion resides generally in means for ‘axially moving the applied through the rolls 108 ‘and 109 to the portion of stop screw 150 to ‘accomplish the desired adjustment. the press roll 101 engaged thereby. Whatever movement of the worm shaft 152 does take As indicated in FIGURES 4 and 5, the top frame ele place can be recorded by measuring revolutions thereof ment 128a mounts depending frame members 128b and and this record may be used to determine the exact thick 128s‘ on either side of the diaphragm 137 and these de ness S at the nip N—2. pending‘frame members 12819 and 128s carry pivot pins Referring now to FIGURES 7 and 8, it will be seen 143 and 143', respectively, which pivotally receive the that a different embodiment of the invention is shown, in extremities 144 and 144’ of a generally Y-shaped lever dicated generally by the reference numeral 200. In this 145. As indicated in FIGURE 5, only the extremities of embodiment 200, elements comparable to those already the two arms 144 and 144' of the lever 145 are shown. shown in connection with FIGURES 3 through 6 are As shown in FIGURE 3, the arms 144 and 144' merge given a comparable reference numeral ‘in the 200 series. 60 to form the stem 146 of the Y-shaped lever 145 and Thus, it will be seen that there is a nip N~3 de?ned be before the arms 144 and 144' merge there is mounted a tween a lower nipde?ning surface 200a and an upper pivot pin 147 extending therebetween and pivotally re nip-de?ning surface 201a formed by a roll 201 of rela tively small diameter. A rubber blanket B—2 is received 149 mounted for vertical adjustment. The position of 65 [by the nip N-‘3 with -a paper Web W-3. A semi-cylindrical housing 270 receives a limited portion of the roll 201 the saddle 149 acting through the lever 145 thus limits comparable in lateral dimension to the portion of the roll the downward movement of the backing rollers 108 101 backed by the rollers 108 and 109 previously de and 109 and the portion of the press roll 101 backed scribed. The roll 201 is clamped in the semi-cylindrical thereby. The position of the saddle 149 determines the minimum amount of space S between the nip-de?ning 70 housing 270 by a shoe 271 bolted thereto so that the roll 201 is held ‘against rotation and will not slip out of the surfaces 160a and 101a. In the’ operation of the instant semi-cylindrical housing 270 if support from beneath device, su?icient pressure may be applied through the (such as the blanket 8-2) is removed. diaphragm 137 to maintain the space S at the desired distance in spite of load resisting forces which may be As indicated, the semi-cylindrical housing 270 forms created in the traveling blanket B-l; but variations in 75 a bridge between spaced arms 210 and 210' (not shown) ceived by the thrust rod 136. The lever stem 146 is provided with a foot 148 that is received in a saddle 3,035,512 8 7 I claim as my invention: 1. Apparatus comprising a ?rst cylinder, a second cylin- v which, in turn, are mounted pivotally at one end on a pivot pin 223 comparable in structure to the pin 123 al der de?ning therewith a nip for pressing a traveling ?exi ble element passing therethrough, a plurality of laterally spaced members swingably mounted about an axis parallel to the nip, opposed rollers carried by each of said mem bers for loading the ?rst cylinder against the second ready described. At the other end of the [arm 210 there is a pivot pin 230 connected to one side of a yoke 234. The yoke 234 is mounted for limited tilting movement on a pivot pin 235 connected to the lower end of a thrust rod 236. It will be ‘appreciated that the opposite arm cylinder at the nip, a separate ?uid pressure actuated means connected to each of said members for resiliently 210' is symmetrical to the arm 210 and mounts corre sponding parts so that the pivot 230 corresponds to the pivot pin 1'30 already described; the yoke 234 corresponds 10 urging said ?rst cylinder toward said second cylinder, a to the yoke 134 already described and the pivot pin 235 corresponds to the pivot pin 135 already described. separate stop for each ?uid pressure actuated means limiting movement of said ?rst cylinder toward said sec ond cylinder, and independent means for adjusting the position of each stop relative to the fluid pressure actuated It should be mentioned that, ‘during operation with a suitably lubricated rubber blanket B-1 the roll 101 will cease to rotate. The roll 201 is, of course, held against 15 means associated therewith. 2. Apparatus comprising a ?rst cylinder, a second cylin rotation so lubrication thereof is required. As shown in der de?ning therewith a nip for pressing a traveling ?exi FIGURE 8, the roll 201 comprises a shell 273 having a ble element passing therethrough, a plurality of laterally myriad of minute perforations therein. This shell 273 is spaced members swingably mounted about an axis parallel securely mounted on a hollow tubular member 274 which \forms the body of the roll 201. The hollow tubular 29 to the nip, opposed rollers carried by each of said members for loading the ?rst cylinder against the second cylinder at member 274 is provided with a plurality of laterally the nip, a yoke pivotally connected to each member about spaced circurnierentially aligned grooves 275, 276, 277, another axis parallel to said nip and a separate ?uid 278, 279, etc. The grooves 275, 276, etc. communicate pressure actuated means pivotally connected to each of with the ?ne perforations of the outer shell 273 so that ?uid may ?ow therefrom against the blanket B2 and 25 said yokes about an axis extending longitudinally of the direction of travel of said ?exible element. lubricate the movement of the blanket B-2 past the roll 3. Apparatus comprising a ?rst cylinder, ?rst bearing 201. Lubricating ?uid in the form of water or the like means rotatably mounting said ?rst cylinder, a second from a suitable source, shown diagrammatically at P cylinder de?ning with the ?rst cylinder a nip for pressing ?ows through a valve V and into any one of a number of a traveling ?exible element passing therethrough, ?xed laterally aligned circumferentially spaced conduits 280, 30 bearing means rotatably mounting the second cylinder, 281, 282, etc. As will be appreciated, valve means V a plurality of members spaced across the width of the nip, are provided individually for each of the conduits 280, ?xed pivots mounting each of said members at one end 281, 282 so that ?ow of ?uid in each may be controlled thereof for swinging movement about an axis parallel to independently. Each conduit communicates with a the nip, movable pivots carried at the opposite end of each groove; and as here shown the conduit 282 communicates 35 of said members, a yoke connected to each of said mem with the groove 27S and the conduit 281 communicates bers by said movable pivots, a separate ?uid pressure with the groove 276. In this way, lubrication at selected actuated means pivotally connected to each of said yokes places in the roll 201 may be accomplished. about an ‘axis extending longitudinally of the direction of It will be seen that in each of the embodiments of travel of said ?exible element for swinging said members 40 the instant invention the use of cylindrical nip rolls (101 about said ?xed pivots, opposed rollers rotatably carried and 201) is permitted while providing for the equipment by each ‘of ‘said members for loading the ?rst cylinder of crowning. This is particularly advantageous since it against the second cylinder at the nip, pins secured to said avoids the slippage due to differences in the peripheral ?rst bearing means and carried by said members for move speeds which are caused by di?erences in diameter along ment of said ?rst cylinder toward and away from said sec the length of a crowned roll. In the instant invention it 45 ond cylinder, and resilient means interposed between said is not necessary to change the “crown” of one or both pins and said members to allow limited relative move rolls each time a change of nip loading is required. Even ment between said ?rst cylinder and said members. though the nip roll 101 or 201 is itself de?ected, the short backing elements (such as the rolls 108 and 109) References Cited in the ?le of this patent used in this arrangement may be straight, or cylindrical 50 rather than crowned, since ‘over the relatively short length UNITED STATES PATENTS of each backing roll set, the de?ection curve does not de 1,346,594 Deerr ________________ __ July 13, 1920 part practically from a straight line. The di?erent posi 2,030,625 Ellis ________________ __ Feb. 11, 1936 tions allowed for the individual stop means for each back 2,138,397 Cannity _____________ __ Nov. 29, 1938 ing roll set permits effective crowning, but the resilient loading means serve to avoid breakage of the equipment during an accident wherein excessive material may pass through the nip at a localized point. Actually, the instant device may be operated without the stop means function ing, merely by the selective loading of the individual dia 60 phragm assemblies 137. On the other hand, with the stop means functioning the diaphragm means 137 may be employed to so load the nip at localized areas that the ‘nip dimensions are maintained at very close tolerances. It will be understood that modi?cations and variations 65 may be effected without departing from the spirit and scope of the novel concepts of the present invention. 2,479,759 2,567,151 2,638,819 2,696,148 Merchant ____________ _.. Aug. 23, Hornbostel ____________ __ Sept. 4, Hornbostel ___________ __ May 19, Hornbostel ____________ .. Dec. 7, 1949 1951 1953 1954 2,851,869 Quoos et al ___________ __ Sept. 16, 1958 FOREIGN PATENTS 160,684 700,436 719,289 Australia ________ _..v_____ Jan. 20, 1955 Great Britain __________ __ Dec. 2, 1953 Great Britain __________ __ Dec. 1, 1954 "4My.