US3844502A

US3844502A - Apparatus for controlling the winding of web material on a dye beam

Info

Publication number: US3844502A
Application number: US00331466A
Authority: US
Inventors: P Toy
Original assignee: Marshall and Williams Co
Current assignee: Marshall and Williams Co
Priority date: 1973-02-12
Filing date: 1973-02-12
Publication date: 1974-10-29
Anticipated expiration: 1991-10-29

Abstract

This specification discloses apparatus for controlling the winding of web material on a dye beam, wherein the tension on the material is reduced as the material increases in diameter and the opposite outer edges of the material are prevented from curling and/or necking as the material is wound upon the dye beam.

Description

[111 r 3,844,502 [451 Oct. 29, 1974 .m a h s n e b 0 APPARATUS FOR CONTROLLING THE a t. S

WINDING OF WEB MATERIAL ON A DYE BEAM Paul Charles Toy, Jr., Exeter, R.l.

Assignee: Marshall and Williams Company,

M t e n 0 r a A [75] lnventor:

Providence, RI. Primary Examiner-John W. Huckert Feb. 12, 1973 Appl. No.: 331,466

Assistant Examiner-John M. Jillions [22] Filed:

Attorney, Agent, or FirmWilliam Frederick Werner ABSTRACT This specification discloses apparatus for controlling the winding of web material on a dye beam, wherein the tension on the material is reduced as the material [52] US. 242/67.l R, 242/68.4,'242/75.5l [51] Int. B65h 17/02, B65h 23/00 [58] Field of Search............. 242/75.5, 75.51-, 75.53,

26/54; 28/1 CF increases in diameter and the opposite outer edges of the material are prevented from curling and/or necking as the material is wound upon the dye beam.

References Cited UNITED STATES PATENTS 3 Claims, 9 Drawing Figures 3,268,142 Macomson.............................. 26/54 apparent in part and be pointed out in part in the fol- APPARATUS FOR CONTROLLING THE WINDING OF WEB MATERIAL ON A DYE BEAM STATEMENT OF INVENTION This invention relates to take-up drums, batchers or dye beams and more particularly to dye beams upon which material iswound in preparation for a dying operation.

BACKGROUND OF THE INVENTION v In prior processes of dying material wound upon a drum it was common practice and necessary to heat set double knit material prior to winding the material upon a dye beam.

The heat set was necessary to provide some rigidity in the material to prevent necking and/or curling of the opposite sides of the web material as it was being wound upon the dye beam.

The heat set in the material created a severe problem for uniform dying of the batch of material wound upon the dye beam because the heat changed the physical characteristics of the synthetic'yarn knitted into double knit material.

The necking and curling created unevenness in the lay of the wind of the material upon the dye beam 50 that in beam dying the material dyed unevenly along the opposite side edges.

OBJECTS OF THE INVENTION It is therefore an object of the present invention to provide apparatus which will wind double knit material on a dye beam in a manner to permit uniform dying of the material throughout the'entire width and depth of the web wound upon the dye beam without prior heat setting of the double knit material.

Another object of the present invention is to wind double knit material upon a dye beam, in a manner, that the material is more tightly wound at the core or beam surface, than on the outside layer, in a graduating scale. The dye fluid will then pass from the core through the material with uniform dye flow due to the lessening of tension on each succeeding layer of the web.

Still another object of the present invention is to eliminate so called grey spots in cloth created by a lack of dye fluid.

A further object of the present invention is to provide anip pressure roll load control.

And still'another object of the present invention is to maintain a constant force at the point of tangency of the beam to the nip roll through'the arc of the beam lever.

Another object of the present invention is to drive a 'beam and also drive a nip roll in surface contact with the beam, so that, the nip roll assists in driving the beam as the material builds up a load factoron the beam. i i

And still another object of the invention is to have the beam arms, which support the dye beams, adjustable toward and away from each other, so as to accommodate dye beams of various lengths.

Other objects of the present invention will become lowing specification and claims.

Referring to the drawings in which similar characters of reference refer to like parts:

FIG. 1 is a fragmentary perspective viewof the right side of the new and improved apparatus for controlling the winding of a web of material on a dye beam;

FIG. 2 is a fragmentary perspective view of the right side of the new and improved apparatus for controlling the winding of a web of material on a dye beam and is an extension of FIG. I;

FIG. 3 is a right side elevational view of FIG. 1;

FIG. 4 is a fragmentary rear elevational view of FIG. 1;

FIG. 5 is a fragmentary rear elevational view of FIG. 2',

FIG. 6 is a left side elevational view of the drive control mechanism;

FIG. 7 is a fragmentary right side elevational view looking at the beam shaft;

FIG. 8 is a rear elevational view, taken on line 8-8 of FIG. 7; and

FIG. 9 is a diagrammatic view of the electrohydraulic system.

In proceeding with this invention, reference is made to the drawings, wherein, (see FIG. 1 and 2) apparatus for controlling the winding on a beam is physically attached to the end of a tenter frame. The entering end of the tenter frame is not shown. The delivery end of the tenter frame is shown. The drawings are to be viewed as if the viewer was standing at the entering end of the tenter looking toward the delivery end of the tenter with the apparatus for controlling the winding on a beam, attached thereto.

It is to be understood, that the present invention is Reference is now made to FIGS. 1, 2 and 3 wherein reference numeral 11 indicates a floor, 12 and 12A indicate concrete foundations upon the floor and- 13, generally indicates,a platform.

The platform 13 comprises a plurality of foot'pads 9 placed upon floor 11 in spaced relation. A front channel 8 is fastened, as by welding, to the plurality of pads 9. A rear channel 7 is also fastened to the plurality of pads 9. A front I-beam 6 and a rear I-beam 5 are fastened to the plurality of pads 9. A front plank 4 is fastened to and overlies I-beam 6. A rear'plank 3 is fastened to and overlies I-beam 5. Edges 2, 2A of beams 6 and 5, respectively, form a guided pathway, generally indicated at (FIG. 1 and 2). A'rear cover 1 is fastened to rear plank 3 and rear channel 7. A front cover IA is fastened to front plank 4 and front channel 8.

A right side channel 7A and a left side channel 5A are fastened to the opposite ends, respectively, of channels 7 and 8. In this manner, a unitary platform 13 is provided and placed against the concrete foundations 12,12A shown at 15, 15A, respectively. Platform 13 may be fastened to floor 11. With continued reference to FIGS. 1 and 2, a rightside delivery stand 16 is fastened to concrete foundation 12. A left side delivery stand 16A is fastened to concrete foundation 12A. De-

spectively, in bearings 21, 21A.

Pillow block bearings

23, 23A, fastened respectively, to

tops

24, 24A rotatably

support stub shafts

22, 22A, respectively.

Pivot sensing arms

25, 25A provided integrally with

shoes

26, 26A are mounted for free pivotal movement upon

stub shafts

22, 22A, respectively.

With reference to all the Figures, a strip roll 27 provided with a strip roll shaft 28 is rotatably mounted on opposite ends in

pivot sensing arms

25, 25A.

Similarly, a nip roll 30 provided with a nip roll shaft 31, is rotatably mounted on opposite ends in

pivot sensing arms

25, 25A. Delivery stand backs 20, 20A are provided with clearance orifices 32, 32A for strip roll shaft 28 and clearance orifices 33, 33A for nip roll shaft 31, respectively.

An idler gear 35 is fastened to a shaft 36 rotatably supported in pivot sensing arm 25. A main drive gear 40 and a pulley 41 are fastened to stub shaft 22.

With reference to FIGS. 1, 2 and 4, a bracket 42 is fastened to delivery stand back 20. A tenter drive motor 43 provided with a motor shaft 44 is fastened to bracket 42. A speed reducer 45 provided with an input shaft 46 and an output shaft 47 is fastened to bottom plate 48 of delivery stand 16. A coupling 49 connects motor shaft 44 to input shaft 46.

With reference to FIGS. 1, 2, 3, 4, 5 and 6, delivery stand backs 20, 20A are provided respectively, with

tenter shaft bearings

50, 50A. A tenter drive shaft 51 rotatably mounted in

tenter shaft bearings

50, 50A is provided tenter shaft drive sprocket 52 and an intermediate sprocket 53. Output shaft 47 provided with a chain sprocket 54 fastened thereon, is drivably connected to tenter shaft drive sprocket 52 by means of a chain belt 55.

variable speed reducer bracket 56 is fastened to front side 57 of delivery stand 16. A variable speed reducer 58 provided with a driven shaft 60 and drive shaft 61 is fastened to bracket 56. A chain belt 62 rotatably connects intermediate sprocket 53 with a pulley sprocket 63 fastened to driven shaft 60. A chain belt 65 rotatably connects sprocket 41 to drive sprocket 66 fastened to drive shaft 61.

With reference to FIGS. 1, 2, 3, 4, 5 and 6,

pads

70, 70A are fastened, respectively, to backs 71, 71A of delivery stands 16, 16A, respectively.

Mounts

72, 72A are fastened, respectively, to

pads

70, 70A.

Load cells

73, 73A, having

plungers

74, 74A, respectively, are fastened to

mounts

72, 72A, respectively.

Plungers

74, 74A are actuated, respectively, by

shoes

26, 26A.

Two tenter clip

chain drive sprockets

80, 81 are splined to tenter drive shaft 51. Two

tenter clip chains

82, 83 operatively connected to a tenter frame (not shown), are operatively connected, respectively, to tenter clip

chain drive sprockets

80, 81. The tenter rails 84, 85 of the tenter frame are schematically illustrated for purposes of orientation. The cross screw 87 of the tenter frame is rotatively mounted on opposite ends in

bearings

88, 88A fastened respectively, to delivery stand backs 20, 20A. The right hand end plate 90 of the tenter frame is shown in FIG. 4 and the left hand end plate 90A is shown in FIG. 5.

Cross screw nuts 91, 92 (shown respectively in FIGS. 1, 2 and 4) are fastened, respectively, to left hand end plate 90A and right hand end plate 90. Rotation of cross screw 87 moves

end plates

90, 90A toward and away from each other.

A center bearing block 101 comprises a body having two depending

legs

98, 99 and an upright support with a groove consisting of a horizontal surface 102 and a vertical surface 103. Two flange bearings 104 are fastened, respectively, in

legs

98, 99. Center bearing block 101 is removably fastened in guided pathway 100 with

groove surfaces

102, 103 slidably engaging edge 2A. Similarly, a second groove is provided in block 101 and said groove engages edge 2, as will presently appear.

Similarly, a right side bearing block comprises a body having two depending

legs

113, 114 and a right side upright support 111 with a front groove 102 and a rear groove 103. Two

flange nuts

112, 112A, each provided with the same hand screw thread 115, are fastened, respectively, in

legs

113 and 114. Right side bearing block 110 is slidably mounted in guided pathway 100 with front groove 102 slidably engaging edge 2 and with rear groove 103 engaging edge 2A.

Similarly, a left side bearing block comprises a body having two depending legs 123, 124 and a left side upright support 121 with a front groove and a rear groove 126. Two flange nuts 122, 122A each provided with the same hand screw thread 127, are fastened, respectively, in legs 123, 124. Left side bearing block 120 is slidably mounted in guided pathway 100 with front groove 125 slidably engaging edge 2 and with rear groove 103 engaging edge 2A.

Two oppositely located

structural steel channels

130, 131 are fastened together by means of tie bars 132, 133 (see FIGS. 1, 2, 7 and 8) to form a right side beam arm, generally indicated by reference numeral 135. Channel is provided with a sliding bearing having a body 136, a flange 137, a bearing surface 138, and a keyway to accommodate key 140. Channel 131 is provided with a sliding bearing having a body 141, a flange 142, a bearing surface 143 and a keyway to accommodate key 140.

Flanges

137 and 142 are fastened, respectively to

channels

130, 131 as by means of screws 145. A spacer bearing 146 provided with a bearing surface 147 and a keyway to accommodate key is rotatably mounted in right side upright support 111.

Two oppositely located

structural steel channels

150, 151 are fastened together by means of tie bars 152 to form a left side beam arm, generally indicated at 155. Channels and 151 are provided with sliding bearings similar to those shown and described for

channels

130, 131 and a spacer bearing similar to bearing 146 is rotatably mounted in left side upright support 121.

Similarly, two oppositely located

structural steel channels

160, 161 are fastened together by means of tie bars 162 to form a center beam arm, generally indicated at 165.

Channels

160, 161 are provided with two

support bearings

166, 167 provided with keyway to accommodate keyway 140 are fastened, respectively, in

channels

160, 161. A center spacer bearing 168 provided with a bearing surface (similar to surface 147) and a keyway to accommodate key 140 is rotatably mounted in center upright support 105.

A right end stand, generally indicated at 170, comprises an outside wall 171 and an inside wall 172. Similarly, a left end stand, generally indicated at 175 comprises an inside wall 176.

Two beam bearings 177, 178 are fastened, respectively, in inside wall 172 and inside wall 176. A beam shaft 180 provided with a key 140 is oscillatably mounted in beam bearings 177, 178. Beam shaft 180 supports and is fastened to, by means of keyways in,

sliding bearings 136,141 and spacer bearing 146 for right side beam arm 135, and sliding bearings and a spacer bearing in left side beam arm 155, and sliding bearings and a spacer bearing incenter beam arm 165.

Two beam arm

adjustment screw bearings

181, 182 are fastened respectively, in inside wall 172 and inside wall 176. A beam arm adjustment screw, generally indicated at 185, consists of a right hand thread section 186 and a left hand thread section 187 and is rotatably mounted on opposite ends in beam arm adjustment Beam arm adjustment screw 185 is provided with a driven pulley 190. A short shaft 191 is rotatably mounted on opposite sides in right end stand 170 through

bearings

192, 193. A drive pulley 194 is fastened to shaft 191. A belt 195 connects drive pulley 194 to driven pulley 190. Short shaft 191 is rotated by a source of power such as a hand wheel 196 or a motor (not shown).

A chuck shaft 210 is rotatably and slidably mounted in

channels

130,, 131 by means of

bearings

211, 212, respectively, A movable chuck plate 213 is fastened to chuck shaft 210. A clevis bracket 215 provided with two

parallel arms

216, 217 is fastened to channel 130.

A positioning arm'2l8 provided with bearing 220 is pivotally connected to parallel arms 2 16, 217 by means of a pintel 221. A connector block 222 is pivotally connected to positioning arm 218 by means of a stub shaft 223. One end of chuck shaft 210 is slidably and rotatably connected to connector block 222 so as to move chuck shaft 210 toward and away from channel 131. A hydraulic beam chuck cylinder 233 provided with a piston rod 224 is fastened to channel 131. A knuckle 225 pivotally connected to positioning arm 218 by means of shaft 226 is also-fastened to piston rod 224. An electrical switch 230 fastened to channel 131 is provided with two buttons 231, 232. Switch 230 is electrically connected to servo valve 234 (see FIG. which is con- 6 504B which is fastened 10 channels 160, 161 (see FIG. 1).

In operation a dye beam 499 or dye core shown in dot and dash lines in FIGS. 1 and 2 is chucked or held between chuck plates and 250. The dye beam, under the force of gravity, lies against nip roll 30. A web of material is held on opposite sides by the pin tenter clips forming

tenter clip chains

82, 83. The cloth is led from the tenter clips under strip roll 27 and over nip roll 30 to be wound upon the dye beam. Motor 495 is started so as to rotate

chucks

213, 215 and thereby the dye beam. The tenter motor is simultaneously started so that the material leaving the tenter will simultaneously be wound upon the dye beam.

The position of the dye beam in relation to the nip roll 30 is controlled by means of the right side beam arm 135, the left side beam arm 155 and beam arm hydraulic cylinder 504 forming part of an electrohydraulic servo loop, (see FIG. 9). A servo valve 600 contains the interface between the electrical and the hydraulic portions of the system. The electrical portion of the system provides the control. The hydraulic portion of the system provides the power. The electro hydraulic servo valve 600 utilizes an electrical signal provided by a (PH) servotrol amplifier to control the flow rate of the hydraulic fluid to the beam arm positioning cylinder 504. The system pressure is held con- 7 stant.

Reference is directed to FIG. 9 where'the automatic mode is arranged as a closed loop feedback control system with proportional position and load control action.

- Toinitiate control, the operative preselects the nip nected to hydraulic pump 497 operatively connected to hydraulic beam chuck cylinder 233. Button 231 causes piston rod 224 through hydraulic pump 497 to move in one direction and button 232 causes piston rod 224 to move in an opposite direction so as to move chuck plate 213 toward and away from channel 131.

l A speed reducer 240 provided with an upper shaft 241 and a lower shaft 242 is fastened to channel 151. A motor 495 provided with a motor shaft 243 is fastened to channel 151 with provision in channel 151 to allow shaft 243 to freely pass thereto. A pulley 244 is fastened to shaft 243. Lower shaft 242 provided with a pulley 245 is rotatably connectedto pulley 244 by means of a belt 246. Upper shaft 241 is rotatably mounted in bearing 247 fixed in channel 150. A nonsliding chuck plate 250 is fastened to shaft 241 directly opposite, so as to cooperate with, movable chuck plate A beam positioning cylinder 504 provided with a piston is fastened to the machine frame at- 504A. The outer end of the piston is pivotally attached to aplate pressure by means of a potentiometer or command, to

the percentage of beam load applied against the face of the nip roll 30. This control establishes the desired servo amplifier command voltage which in turn positions the servo valve torque motor. With the servo valve positioned, a regulated flow of hydraulic fluid is supplied to the beam arm hydraulic cylinder 504,

which'through the cylinder piston, moves the center beam arm 165 and through beam shaft 180, right side beam arm 135, left side beam arm and the'dye beam held between the

beam arms

135, 155,relative to the nip roll 30.

The nip roll 30 is directly connected to the load cells through the pair of sensing

arms

25, 25A, therefore,

when the beam load is varied by means of material wound thereon, the feedback signal from the load cells is also varied. The feedback signal is sent to the BLH signal conditioner amplifier which indicates the actual percentage of nip load and simultaneously sends a conditioned signal to the Pl-lamplifier. The PH amplifier takes the feedback signal and compares it to the input command signal as initially set by the operative. Once compared, the difference between the signals (termed error") is then sent to the servo valve, which in turn varies the flow to the beam arm hydraulic cylinder 504 to change the dye beam position. This servo loop pro-' vides the necessary proportional position and load control action which insures that the web is continuously nipped at a constant valve throughout the winding cycle.

Having shown and described a preferred embodiment of the present invention by way of example, it should be realized that structural changes could be made and other examples given without departing from either the spiritor scope of this invention.

What I claim is:

1. Apparatus for controlling the winding of web material on a dye beam comprising a platform, a pair of beam arms Comprising a right side beam arm, and a left side beam arm, means pivotally connecting said right and said left beam arms to said platform at, respectively, one end thereof, a pair of clutch elements comprising a chuck shaft rotatably mounted in said right side beam arm, a movable chuck plate fastened to said chuck shaft, a shaft rotatably mounted in said left side beam arm, a non-sliding chuck plate fastened to said shaft opposite to and aligned with said movable chuck plate, to provide means to removably support a dye beam therebetween, independent drive means rotatably connected to one of said pair of clutch elements to provide means to rotate a dye beam, doffing means for moving one of said pair of clutch elements toward and away from the other of said pair of clutch elements, a pair of stands positioned adjacent, respectively, said pair of beam arms, a pair of pivot sensing arms, means pivotally mounting said pair of pivot sensing arms, respectively, in said pair of stands, a nip roll rotatably supported on opposite ends in said pair of pivot sensing arms, a pair of load cells, one for each of said pair of pivot sensing arms, means fastening said pair of load cells, respectively, to said pair of stands, whereby, contact of said nip roll with a dye beam causes said pair of sensing arms to actuate said pair of load cells, in direct relation, to the increase in diameter of a dye beam, a beam positioning cylinder, having a piston, means fas: tening said cylinder in a stationary position and means pivotally connecting said piston to said pair of beam arms, an electro hydraulic closed loop feedback control system with proportional position and load control action containing said load cells, a PH servo amplifier and BLH signal conditioner, a feedback signal voltage conduit between said load cells and servo amplifier and signal conditioner, a voltage load input command means connected to said servo amplifier and signal conditioner, a servo valve, an error signal voltage connection between said servo amplifier and signal conditioner, said feedback signal and said voltage load input command being compared in said servo amplifier and signal conditioner and the difference in voltage passing an electrical impulse signal to said servo valve, a regulated flow conduit between said beam positioning cylinder and said servo valve whereby said servo valve regulates the hydraulic fluid flow to said beam positioning cylinder to move said beam position cylinder piston a selected distance, to vary the distance between said nip roll and a dye beam supported between said pair of beam arms.

2. Apparatus for controlling the winding of web material on a dye beam comprising a platform provided with a guided pathway, a center beam arm, provided with an upright support, fixed in said guided pathway, a right side beam arm, provided with an upright support, and a left side beam arm, provided with an upright support, means slidably mounting said right and said left side beam arm, in said guided pathway, a beam arm adjustment screw provided with a right hand thread and a left hand thread, rotatably mounted in said center beam arm with said right hand thread rotatably connected to said right side beam arm and said left hand thread rotatably connected so said left side beam arm, means rotatably connected to said beam arm adjustment screw to move said right side beam arm and said left side beam arm toward and away from said center beam arm, a beam shaft, keyed to said center beam arm upright support, and keyed to both said right side beam arm upright support and to said left side beam arm upright support, a piston cylinder provided with a piston, means fastening said piston to said center beam arm and said piston cylinder in a stationary position, a movable clutch plate rotatably mounted in said right side beam arm, and means slidably moving said movable clutch plate toward and away from said right side beam arm, a non-slidable clutch plate rotatably mounted in said left side beam arm, to support a dye beam between said movable clutch and said non-slidable clutch plate, a motor fixed to said platform and having a motor shaft, means rotatably connecting said motor shaft to said non-slidable clutch plate to rotate said non-slidable clutch plate, a right side stand and a left side stand positioned adjacent said platform and aligned, respectively, with said right side beam arm and said left side beam arm, a pair of pivot sensing arms pivotally connected, respectively, to said right side stand and said left side stand, a nip roll rotatably mounted on opposite sides to said pair of pivot sensing arms, motor means rotatably connected to said nip roll to rotate said nip roll, a pair of load cells fastened, respectively, to said right side delivery stand and said left side delivery stand and aligned, respectively, for actuation by said pair of pivot sensing arms, and an electro-hydraulic system including said pair of load cells for controlling movement of said nip roll by causing said piston to move said right side beam arm and said left side beam arm toward and away from said nip roll.

3. In an apparatus as defined in claim 2, a strip roll rotatably mounted on opposite ends to said pair of sensing arms, a tenter drive shaft rotatably mounted on opposite ends to said right side delivery stand and to said left side delivery stand, said motor means rotatably connected to said nip roll, having additional drive means to said tenter drive shaft, and to said strip roll, to drive said nip roll, strip roll and tenter drive shaft in relative relationship.

Claims

1. Apparatus for controlling the winding of web material on a dye beam comprising a platform, a pair of beam arms comprising a right side beam arm, and a left side beam arm, means pivotally connecting said right and said left beam arms to said platform at, respectively, one end thereof, a pair of clutch elements comprising a chuck shaft rotatably mounted in said right side beam arm, a movable chuck plate fastened to said chuck shaft, a shaft rotatably mounted in said left side beam arm, a non-sliding chuck plate fastened to said shaft opposite to and aligned with said movable chuck plate, to provide means to removably support a dye beam therebetween, independent drive means rotatably connected to one of said pair of clutch elements to provide means to rotate a dye beam, doffing means for moving one of said pair of clutch elements toward and away from the other of said pair of clutch elements, a pair of stands positioned adjacent, respectively, said pair of beam arms, a pair of pivot sensing arms, means pivotally mounting said pair of pivot sensing arms, respectively, in said pair of stands, a nip roll rotatably supported on opposite ends in said pair of pivot sensing arms, a pair of load cells, one for each of said pair of pivot sensing arms, means fastening said pair of load cells, respectively, to said pair of stands, whereby, contact of said nip roll with a dye beam causes said pair of sensing arms to actuate said pair of load cells, in direct relation, to the increase in diameter of a dye beam, a beam positioning cylinder, having a piston, means fastening said cylinder in a stationary position and means pivotally connecting said piston to said pair of beam arms, an electro hydraulic closed loop feedback control system with proportional position and load control action containing said load cells, a PH servo amplifier and BLH signal conditioner, a feedback signal voltage conduit between said load cells and servo amplifier and signal conditioner, a voltage load input command means connected to said servo amplifier and signal conditioner, a servo valve, an error signal voltage connection between said servo amplifier and signal conditioner, said feedback signal and said voltage load input command being compared in said servo amplifier and signal conditioner and the difference in voltage passing an electrical impulse signal to said servo valve, a regulated flow conduit between said beam positioning cylinder and said servo valve whereby said servo valve regulates the hydraulic fluid flow to said beam positioning cylinder to move said beam position cylinder piston a selected distance, to vary the distance between said nip roll and a dye beam supported between said pair of beam arms.