US1930733A

US1930733A - Web roll controlling mechanism

Info

Publication number: US1930733A
Application number: US505551A
Authority: US
Inventors: John R Tomlin
Original assignee: R Hoe and Co Inc
Current assignee: R Hoe and Co Inc
Priority date: 1930-12-30
Filing date: 1930-12-30
Publication date: 1933-10-17
Anticipated expiration: 1950-10-17

Description

Oct. 17, 1933. J, R. TOMLIN WEB ROLL CONTROLLING MECHANISM Filed Dec. 30, 1950 8 Sheets-Sheet l -INVENTOR Oct. 17, 1933. J, R TOMLIN WEB ROLL CONTROLLING MECHANISM Filed Dec. 50, 19,30 8 Sheets-Sheet 2 INVENTOR Oct. 17, 1933. TQMLIN 1,930,733

WEB ROLL CONTROLLING MECHANISM Filed Dec. 30. 1930 8 Sheets-Sheet 3 1933- J. R. TOMLIN I WEB ROLL CONTROLLING MECHANISM Filed Dec. 30, 1950 8 Sheets-Sheet 4 R O T N E V m Oct 17, 1933. J R, TQMLIN 1,930,733

WEB ROLL CONTROLLING MECHANISM Filed Dec. 50, 1950 8 Sheets-Sheet 5 Oct. 17, 1933. J. R. TOMLIN WEB ROLL CONTROLLING MECHANISM Filed Dec. 50, 1930 8 Sheets-Sheet 6 Oct. 17, 1933. -J. R. TOMLI N WEB ROLL CONTROLLING MECHANISM Filed Dec. 30, 1930 8 Sheets-Sheet 7 I III .IIIIII'IIIIIIIIIIllllllllllllllllllllll' 7!! J. R. TOMLIN WEB ROLL CONTROLLING MECHANISM Filed Dec. 30, 1930 8 Sheets-Sheet 8 l. ff A q.

5 Q max-aw INVENTOR Patented Oct. 17, 1933 UNITED STATES PATENT QFFICE John R. Tomlin, Brooklyn, N.

Y., assignor to It.

Hoe & (30., Inc., New York, N. Y., a corporation of New York; Irving Trust Company, receiver Application December 30, 1930 Serial No. 505,551

44 Claims.

This invention relates to mechanism for controlling the rotation of a web roll from which a web is fed to a printing machine. In thus feeding a web, it is necessary to maintain a certain degree of tension thereon and this is preferably accomplished by applying some form of brake to the rotating roll. The mechanism disclosed herein constitutes a tension device in which the web roll is carried on a spindle or gudgeons that provide journals on which the roll may be rotated and a braking device is coupled to the spindle or gudgeons by means of a clutch.

It is desirable that the tension on the web be maintained constant and hence the mechanism preferably provides means for varying the braking action, to compensate for the changing diameter of the roll. As it is frequently necessary to stop printing machines quickly in case of an emergency, means are preferably provided for exerting additional tension on the roll to prevent it from unwinding excess web whenthe machine is decelerated rapidly.

As it is desirable that the operator in charge of the machine be provided with means for properly adjusting the tension on the web, the mechanism is preferably formed with means for visually indicating the tension.

My pending application Serial No. 443,164, filed April 10, 1930, shows a roll controlling mechanism that includes features of the device disclosedherein which are not covered by the claims of this application.

An object of the invention herein disclosed, is to provide a web roll controlling mechanism for a printing machine that will maintain a constant tension on the web during the entiretime that the roll is unwinding.

Another object of the invention is to provide a web roll controlling mechanism in which means are provided for increasing the resistance to rotation of the web roll when the machine is decelerated rapidly.

Another object of the'invention is to provide a web roll controlling mechanism having means for rotatably supporting the rolls and readily connecting or disconnecting them from a tension control mechanism.

Another object of the invention is to provide a web roll controlling mechanism having a braking device which can be adjusted to vary the resistance to rotation of the roll and having a mechanism for visually indicating the adjustment.

It is also an object of the invention to provide a web roll controlling mechanism of generally improved construction, whereby the device will besimple, durable and relatively inexpensive in construction, as well as convenient, practical, serviceable and efficient in its use.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts, and in the details of construction hereinafter described and claimed, it being understood that various changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

The preferred embodiment of the invention is illustrated in the accompanying drawings, where- 1h:

Figure 1 is a view partly in section showing a portion of a web roll and a portion of the frame of a printing machine to which the tension device that is the subject of the invention is applied. The clutch mechanism that couples the tension device to the roll is shown in this view in the engaged position;

. Figure 2 is a fragmentary sectional view showing the clutch mechanism in the disengaged position; V

Figure 3 is a sectional view showing the interior of the tension device as it appears on lines 3-3 of Figures 1 and 5 and in the direction of the arrows;

Figure 4 is a view showing a portion of the tension device and the manner in which it is applied to the printing machine, the view being taken in the direction of arrow 4 of Figure 1;

Figure 5 is a vertical sectional view showing the interior mechanism of the tension device as seen on the line 55 of Figure 3 looking in the direction of the arrow;

Figure 6 is a sectional plan view of the tension device showing the mechanism as it appears on the line 6--6 of Figure 5 and as viewed in the direction of the arrow;

Figure 7 is a fragmentary view partly broken away showing the mechanism for indicating the adjustment of the tension;

Figure 8 is a fragmentary view partly in section showing the mechanism for varying the pressure of the braking device in response to variation in the diameter of the web roll, the view being taken on the line 88 of Figure 6 and in the direction of the arrow;

- Figure 9 is a fragmentary sectional view showing details of the mechanism for varying the operation of the portion of the braking mechanism that acts when the machine is decelerated rapidly, the reaction compensates for variation in the diameter of a web roll as it unwinds, the view being seen on the line indicated by the arrow in Figure 6;

Figure 10 is a sectional view through the tension device in the plane of the stationary friction members as viewed on the line 10-10 of Figure 6 and in the direction of the arrow;

Figure 11 is a vertical sectional enlarged view of the clutch mechanism shown in the disengaged position;-

Figure 12 is a similar view of the clutch mechanism shown in the engaged position;

Figure 13 is a sectional view showing a portion of the clutch mechanism viewed on the line 13-13 of Figure 12 and in the direction of the arrow;

Figure 14 is a sectional view of the clutch member as viewed on the line 14 14 of Figure 11 and in the direction of the arrow;

Figure 15 is a view of a portion of the clutch member with the operating sleeve removed, the view being taken in the direction of arrow 15 of Figure 11;

Figure 16 is a view partly in section showing a web roll, a portion of which is broken away, mounted on gudgeon members, one of which is engaged by the clutch mechanism to connect it to a tension device, not shown;

Figure 1'7 is an enlarged sectional view of the expandable member of the gudgeon device;

Figure 18 is an enlarged view of the end of the gudgeon that is adapted to be engaged by the clutch;

Figure 19 is a sectional view of the end of the gudgeon member as seen on line 19 of Figure 18 and in the direction of the arrow;

Figure 20 is a sectional view of the expandable member of the gudgeon device as seen on the line 20 of Figure 1'7 and in the direction of the arrow;

Figure 21 is a sectional view of the expandable member of the gudgeon device as seen on the line 21 of Figure 17 and in the direction of the arrow;

Figure 22 is a view of the end of the expandable member of the gudgeon device as seen in the direction of arrow 22 of Figure 1'7;

Figure 23 shows a tension device connected to a roll that is supported on a spindle that is adapted to be engaged by a modified form of coupling mechanism;

Figure 24 is a fragmentary view of the coupling mechanism shown in Figure 23 in which the spindle or gudgeon is shown disconnected from the tension device; and

Figure 25 is a view similar to Figure 24 in which the parts are shown in the position they assume during their action in automatically coupling the web roll spindle or gudgeon to the tension device.

Referring to the drawings, 31 indicates the portion of the main frame of a printing machine having an open bearing indicated at 32. A web roll from which a web is fed to the press as shown broken away and indicated at 33. These rolls as it is generally known, are wound on hollow cores and in practice are usually supported on spindles for unwinding. A spindle is indicated at 34 and is provided with a collar 35 which is locked to the spindle and a tapering sleeve 36 which is forced into the core by the adjusting nut 3'7. It will be understood that a similar construction is provided for the other end of the roll that is not shown. and means are thus provided for rotatably supporting the roll so that it may be unwound to feed a web to the printing machine.

Mechanism for resisting the rotation of the roll in order to produce a proper tension on the web as it is fed to the machine, has in the past been provided by braking mechanism of various kinds. The braking device that is the subject of the present invention is indicated generally at 38 in Figure 1 and consists of a cylindrical housing or body 39, having a web 41, which is best shown in Figure 6. The web carries a hub 42, which is bored to form a bearing for a shaft 43 that is rotated by the roll as will be hereinafter explained. The outside of the hub 42 is turned to form a seat at 44 for a brake block holder 45, to which studs 46 are secured. These studs enter holes in the web 41 and thus prevent the brake block holder 45 from turning.

Brake blocks 4'7 are secured to the brake block holder 45, by means of screws shown at 48 in Figure 10. The outer end of the hub 42 is threaded and provided with an adjusting collar 49 which can be turned to adjust the position of the brake block holder. The cap 51 is secured to the hub 42 by screws 52 and bears against the shoulder 53 on the shaft 43. A cover plate 54 is fitted over the hub of the brake block holder 45 and is secured to the housing 39 by the bolts 55. An end plate 56, is secured to the opposite end of the housing 39 by screws 5'7 and is bored at its center to form a bearing 5'7 for the shaft 43. An end thrust bearing indicated'at 58, has one of its members fitted to the hub of the end plate 56 and the other member fitted to a shouldered collar 59, supported on the shaft 43 and held in place by a nut 61. A cover plate for the bearing is shown at 62, partly broken away in Figure 6.

The shaft 43 is drilled to receive an axle 63 which rotatably supports a pair of rollers at the opposite sides of the shaft. One of the rollers is indicated at 64, and pins 65 are provided to hold them in place. A brake wheel 66, is formed with a hub 6'7, that is loosely fitted to the shaft 43 and two diagonal slots as indicated at 68 in Figure 5, are formed in the hub 6'7 and arranged to engage with the rollers 64. It will be understood that any relative rotary motion between the brake wheel 66 and the shaft 43 on their common axis will result in moving the rollers in the slots and causing axial motion of one of the members with respect to the other, this motion being utilized to aifect the pressure between the brake blocks 47 and a brake face 69 that is formed on the brake wheel 66. A ball thrust bearing is supported on the shaft 43 and comprises a thrust ring '71, fitted to the hub 6'7 and a thrust ring '72, which is fitted to a collar or thrust member '73, that is loose on the shaft 43. Balls '74 are arranged between the thrust rings in the usual manner.

A yoke '75 is bored in the ends to receive pivot pins '76 which are secured in place by means of pins '77. The pins '76, as best shown in Figure 3, have bearings in bosses 78 formed in the housing 39. Slots '79 are formed in the yoke '75 and are fitted to engage with trunnions 81, that are formed on the collar or thrust member '73. The yoke '75 is formed with a brake lever 82, having an arcuate face 83. A pressure actuated member which is preferably made in the form of a roller as indicated at 84 and shown best in Figure 8, is carried in a roller holder 85, formed with a stem 86, that is slidably supported in the bore of a tubular lever 87, which is seemed to a shaft 88. A collar 89 is loosely fitted to the tubu lar lever 8'? and serves as an abutment for one end of a spring 91, the other end of which presses against the head of the roller holder and acts to force the roller 84 against the brake lever 82, thus acting to press the brake face 69 aga'nist the brake blocks a? and thereby resist the ro tation of the roll.

The collar 89 is provided with trunnions 92, which rotatably support rollers .93. These rollers are engaged by the a mate surfaces 94 or a bifurcated tension adjusting arm 95 having a boss 96 that is threaded internally to engage a threaded shaft 97 rotatahly supported in bearings formed in a bracket 98 that is secured to the housing 39. The shaft 97 is extended through the end plate 56 and provided with a hand wheel 99. It will be understood that by turning the hand wheel, the tension adjusting arm 95 will act to move the collar 89 along the lever 8'? and thus vary the pressure exerted tlaough the spring 91, and the roller 84 against the brake lever 82. The arcuate surfaces 941- are formed approximately concentric with the shaft 88, and it be seen that the lever 87 may be freely turned to move the roller 84 along the surface 83.

As shown in Figure 3, a pinion 101 is secured to the shaft 9? and meshes with a gear 182 secured to a shaft 103. This shaft is extended through the end plate 56 and carries on its outer end, a tension indicator 104, best shown in Figure 7, which may be calibrated to indicate the tension in pounds that is exerted on the web. A cooperat ing index 105 is secured to the cover plate 55. Bearings for the shaft 88 are provided bosses formed in the housing 3:? and indicated at 106 and 10?. The shaft projects beyond the boss 1 l and is secured to an arm 108. This arm is pivotally connected to a rod lo the end of which is screw threaded into a right and left hand coupling ill, the other end of which is connected to a pivot headed rod 112, which in turn is connected to a swivel fitting 113 that is pivotally connected to an arm are, secured to a shaft 115; these parts being shown in Figures 1 and The shaft 115 is rotatably supported in a bearing formed a bracket 116 secured to a support 137, which in turn is secured to the frame 8i. The shaft 115 also has a hearing in the frame El shown in Figure 1 ans is preferably extended across the machine to similar hearing in the opposite side frame which not shown.

i compensator arr is secured to the shaft 115 Toy a set screw lie and is preferably arranged a forked extremity having a pin l2l winch rotatably supports a roller 12? that is pressed against the periphery of the weh roll and constitutes a follower member which acts to turn the shaft 88 and vary the pressure against the brake lever with changing diameter of the web roll.

An arm i215 that is shown in Figures 5 and 6 is also secured to the shaft 88. This arm carries a boss 12d that engages one end of a tension spring 125, the other end of which is hooked to a spring anchor 126 secured to the housing 39. This spring acts to turn the shaft 88 and hold the roller 122 against the periphery of the web roll. The arm 123 is extended to form a cam surface 12'? which engages with a roller 128. The roller is rotatably supported on a brake anchorage member best shown on Figures 5 and 9 and indicated generally with the numeral 129. The member is made up of an arm .31, a stud 132, one end of which is se ored to the arm 2 .31, a roller holder Z33, is secured to the other end or" the stud 132 carries a pin 13% on which the roller-128 The brake anchorage se' rotatablv supper a bearing formed in a to the housing 39. The brake anchorage niernleer formed with a e 9 adapted to receive a brake one i 338 having a threaded stein passe through the bracket 13'? and is scorned by An auxiliary conzlsts of a brake band 141 having a ngages a pin l i3 secured to the brake 138, and is preferably provided a hrake of suitable material indicated at 14:. The hralze hand engages a brake sheave M5 1 on the brake wheel 66. The other end of the brake hand is formed with a loop 146 and engages a in is? carried by an arm 148 secured to a i419 rotatahly supported in a hearing bracket 151 that is secured to the I An arm 152 is also secured to the shaft i 29 and carries a spring anchor 153 to which one end of a spring 15% is secured, while the other end is engaged by a pin 155 held in the-plunger 56 a solenoid magnet having a frame 15? and a i58, leads of which are brought to terminals 159. The iran'le or" the solenoid a a plate ldl that is fastoned to the 39 by means of screws 162. It will be seen hat the solenoid energized, the pull of ..e he communicated through t e spring and the lever 152 will act to tighten on the sheave 145.

The c noid is connected s, ot in such manner that it press is stopped pi machine is driven urina s of a dynamic be connected in one of ass through relays or to controlie for the motor Preferably it will be t when an omen the solenoid the ctions of course, 2 controller and nnecessary to de ctions are well connec d across brake a number d one of s oly supported is indierai in El e 1 2Z2 Figures ii to 15 1 formed with body member 1 a a feather 165 on the shaft as shown cap 165 is secured the end or one e3 and acts as an abutment for one end of a spring 16?, the other end of hears a collar 168 that is loose on hodv member 16%, of the arranged with oppositely disposed slots 169 iev re 1?]. are fitted to turn on pivot pins 112 The levers have jaws 173 which engage formed sockets in the end of the spindle or gurlgeon carrying a web roll. A shell TM is fitted to slide on the body member 16%. This shell is provided flanges 175 between wliich rollers .76 are fined to run. The rollers 176 are carried by a forked. arm 1T3 that cared to a pin 135 that is ,nslle or gudgeon on turns on the pivot pin 178 which is supported by a bracket 179 secured to the frame 31. The arm 1'77 is extended to form a handle as indicated at 181, and a spring 182 may be arranged as shown in Figure 16 to bias the arm in the direction in which it is moved to lock the jaws on the spindle as will be hereinafter explained. It will be understood that by operating the handle, the shell may be moved am'ally on the body member of the clutch. As shown in Figure 11, the handle is moved to the left and both the shell and the body member are moved back to permit a web roll to be placed in position.

The levers 1'71 are formed with cam surfaces at 183 and 184 which engage respectively with

inner surfaces

185 and 186 formed on the shell. Shoulders indicated at 187 are formed on the levers 171 and are adapted to engage with the sliding collar 168. Referring to Figure 11, it will be seen that the action of the spring pressing against the shoulders of the levers tends to close the jaws, but they are prevented from closing by the cap 165.

When it is desired to engage the clutch with a spindle that is placed in alignment with it, the handle 181 is moved toward the right. The initial motion results in moving the clutch body on the shaft until the jaws hook over the head 188, the spring 167 then acts to snap the jaws into the grooves 189. The clutch or spindle may then be turned to align the jaws with the cavities 191 formed in the groove in the spindle. This couples the spindle to the shaft of the tension mechanism preventing either axial or radial motion of either one with respectto the other. Further motion of the handle 181' toward the right, brings the parts to the position shown in Figure 12 in which the cam surfaces 183 of the levers are engaged by the inner surfaces 185 on the shell. The levers 171 are thus locked in position so they will not be dislodged by centrifugal action when the parts are rotated at high speed.

In releasing the clutch from the position shown in Figure 12, the handle 181 is moved toward the left. The initial motion moves the shell so as to disengage it from the cam surfaces 183 on the levers. Further motion brings the surfaces 188 into engagement with the cam surfaces 184 and acts to pull the jaws out of engagement with the spindle and then to move the whole clutch bodily to the position shown in Figure 11.

In feeding the web to the printing machine, it is necessary to provide means for moving the web roll axially a short distance to properly register the printing. In the invention disclosed herein, this is accomplished by moving the tension mechanism. The support 117 is formed with ways 192 and suitably formed feet 193 and provided on the housing 39 which are fitted to slide on the ways 192. Gibs 194 are secured to the support 117 and serve to hold the feet on the ways.

A screw shaft indicated at 195 is threaded into a lug 195 formed on the housing 39. A lug 197 is formed on the support 117 and acts as a bearing for the shank of the screw shaft 195. A hand wheel 198 and a collar 199 are secured to the screw shaft 195 and bear respectively against both sides of the lug 197. It will readily be understood that by turning the hand wheel, the housing and with it the complete tension mechanism is moved axially with the shaft 43, and when it is coupled to a spindle or gudgeon carrying a web roll that the roll may be adjusted to properly register the web.

While the tension mechanism disclosed herein may be used to control the operation of web rolls that are carried on spindles as shown in Figure 1, it is preferably arranged to cooperate with gudgeons as shown in Figures 16 to 22 inclusive. These gudgeons are arranged to fit inside of the core of the web roll, and one is provided for each end of the roll. As shown, these comprise a spindle 201, the outer end of which as indicated at 202, forms a journal on which the web roll may be rotatably supported. A collar or expander 203 having a tapered surface is secured to the inner end of the spindle and a second tapered collar or expander 204 is loosely fitted thereon and is adjustable by means of a nut 205 which is screw threaded on the spindle. An expandable member 206 is formed with tapering surfaces at 207 and 208 which are adapted to be engaged by the

expanders

203 and 204. Slots indicated at 209 are formed in both ends of the expandable members and it will readily be understood that by turning the nut 205 on the spindle, the expanders may be forced into engagement with the tapered surfaces on the expandable member, thus clamping the gudgeon member within the core.

The cores of web rolls are usually formed with slots in one or both ends as indicated at 211. A projection or key 212 is formed on the expandable member and adapted to engage the slot of the core and thus aid in keeping the roll from turnmg on the gudgeon member. The gudgeon member that is used in the end of the roll adjacent to the tension mechanism is preferably formed with a flange having a bearing surface indicated at 213 which bears against the end of the web roll and aids in properly locating the position of the gudgeon in the core.

The center portion of the expndable member is formed with an outer periphery indicated at 214, which is but slightly smaller than the inside diameter of the core of the web roll, and the bore of the expandable memberat the center portion is made with but a slight clearance between it and the spindle 201. As the slots 209 do not extend into the center portion, it is rigid at this point. A key 215 is secured to the spindle and engages a slot 216 formed in the center portion of the expandable member which is thus prevented from turning relative to the spindle. This construction, it will be noted, produces a rigid gudgeon which engages the core of the roll over a wide area and'the small clearances allowed effectively prevent any disadvantageous springing of the spindle when the weight of theroll is placed on the journals.

The head of the gudgeon may be formed in a separate piece as shown in Figures 18 and 19 and secured to the spindle 201, but the arrangement preferably provides the head 188, the groove 189 and cavities 191, as previously described.

In the modified form of the invention shown in F'gures 23 to 25 inclusive, an automatically engaging clutch is shown. In this form, the end of the spindle or gudgeon that supports the web roll is formed with a head 221 that is threaded to engage with a cone clutch member 222 that slides on a feather 223 on the shaft 43. A spring 224 normally holds the clutch member in the position shown in Figure 23. However, when a web roll carried on a spindle or on a gudgeon is being moved into position, the head of the spindle 221 will approach the clutch member in the manner shown in Figure 24. Further motion of the roll to the running position will then move the clutch member backward, pressing the spring 150 1&30383 as shown in Figure 25. When the web roll is moved into running position, the spindle will be in axial alignment with the clutch, and two or three turns of the web roll in the direction in which it is unwound, wll result in screwing the head of the spindle into the clutch member as shown in Figure 23 and thus coupling the parts together. It will be seen that the clutch may be disengaged when desired by turning the roll backwards. As the screw threads on the clutch member and on the head will hold the head closed against the end of the shaft 43 while the roll is running, it will be seen that the mechanism previously described for adjusting the position of the roll is equally efiective with this type of coupling.

in operation, when gudgeons are used, these are first placed n the core of the roll and the lock. nuts 205 are drawn up, efiectively locking the gudgeons in the roll wh ch may then be placed on i usual guide ways and rolled into the journal bearings and into alignment with the shaft of the tension device. Meanwhile the coupling will have been moved back by manipulation of the lever 181. The next operation is to move the lever 181 to bring the coupling forward and engage the jaws with the end of the gudgeon or spindle, and it of course, be understood that the operation will be similar cases where the web roll is carried on a spindle. The use of gudgeons is preferable because they are lighter and easier to handle in the restricted space of some pressrooms.

When the roll is rotated to feed the web to the printing machine, the initial motion of the roll turns the shaft 43 of the tension mechanism and with it the rollers 64. These act on the cam slots in the brake wheel 68 tending to move the brake face 69 out of engagement with the brake blocks 4'7, against which it is normally pressed by the action of the spring 91. It will be understood that thus reducing the brake pressure allows the roll to start without excessive res stance, and the tension on the web is maintained constant. The value of tension can be adjusted by turning the hand wheel 99. As the roll decreases in size, the follower roller 122 acts to move the brake thrust roller es downward along the brake lever 82. thus decreasing the distance between the roher and the axis of the pns 76 on which the yoke 5 is fulcrumed and reducing the efiect of the spring 91. in consequence less pressure is applied by the brake and the roll is allowed to rotate more freely, the mechanism being arranged to produce a substantially constant tension on the we throughout the unwinding operation.

The follower ller also varies the action of the rnergency brake a similar manner, and it will he seen that if the emergency brake is applied to a roll, it acts to cause a greater brake pressure than when it is applied to a small roll, and that the erfective pressure to be applied is varied to suit the diameter of the roll.

From the foregoing description it be seen that a mechanism has been prowided for sup-' porting a web roll so that it may be rotated on its are for unwinding and that a braking device is disclosed that will act to resist rotation of the roll in such manner that a uniform tension will be produced on the web from the start to the finish of an unwinding operation. Furthermore, the brak'ng device will provide additional retarding action if the press is stopped quickly and thus prevent the roll from running ahead and unwinding excess paper. The support for the web roll is adapted to be readily inserted and as readily removed from the core and is of a size that is convenient for handling in a restricted space, and a coupling mechanism is provided for quickly coupling the support to the shaft of the braking device and effectively locking these members together so that they rotate in unison and so the roll may be moved axially by movement of the braking mechanism.

Jlfhat I claim is:

1. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll, means tending to press the said friction members together to resist the rotation of the roll, means acting to reduce the pressure on the friction members when the roll is rotated, and means acting to reduce the pressure as the diameter of the roll decreases.

2. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll and limitedly rotatable with respect thereto, means tending to press the said friction members together to resist the rotation of the roll, means acting to reduce the pressure on the friction member when the roller is rotated, and means acting to reduce the pressure as the diameter of the roll decreases.

3. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll, means tending to press the said friction members together to resist the rotation of the roll, means acting to reduce the pressure on the friction members when the roll is rotated, means acting to reduce the pressure as the diameter of the roll decreases, and means to apply additional resistance when the mach ne is decelerated quickly.

4. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll and lirnitedly rotatable with respect thereto, means tending to press the said friction members together to resist the rotation of the roll, means acting to reduce the pressure on the friction members when the roll rotated, means acting to reduce the pressure as the diameter of the roll decreases, and means to apply additional resistance to the rotation of the roll when the machine is decelerated quickly.

5. in a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll, means tending to press the said friction members together to resist the rotation of the roll, means acting to reduce the pressure on the friction members when the roll is rotated, and a follower engaging the periphery of the roll and acting to reduce the pressure on the friction members as the diameter of the roll decreases.

6. in a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll and linzitedly rotatable with respect thereto, means tending to press the said friction members together to resist the rotation of the roll, means acting to reduce the pressure on the friction members when the roll is rotated, and a follower engaging the periphery of the roll and acting to reduce the pressure on the friction members as the diameter of the roll decreases.

Z. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll, means tending to press the said friction members together to resist the rotation of the roll, means acting to reduce the pressure on the friction members when the roll is rotated, means to apply additional resistance to the rotation of the roll when the machine is decelerated quickly, and a follower engaging the periphery of the roll and acting to vary the pressure on the friction members and to vary the said additional resistance in response to variation in the diameter of the roll.

8. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member operatably connected to the roll, means tending to press the said friction members together to effect a braking action on the roll, manually operated mechanism for adjusting the pressure of said friction members, means acting to reduce the pressure on the friction members when the roll is rotated, and means acting to reduce the pressure as the diameter of the roll decreases.

9. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll and limitedly rotatable with respect thereto, means tending to press the said friction members together to effect a braking action on the roll, manually operated mechanism for adjusting the pressure of said friction members, means acting to reduce the pressure on the friction members when the roll is rotated, and means acting to reduce the pressure as the diameter of the roll decreases.

10. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member operatably connected to the roll, means tending to press the said friction members together to effect a braking action on the roll, manually operated mechanism for adjusting the pressure of said friction members, means acting to reduce the pressure on the friction members when the roll is rotated, means acting to reduce the pressure as the diameter of the roll decreaseaand means for applying additional resistance to the rotation of the roll when thev machine is decelerated quickly.

11. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll and limitedly rotatable with respect thereto, means tending to press the said friction members togethter to effect a braking action on the roll, manually operated mechanism for adjusting the pressure of said friction members, means acting to reduce the pressure on the friction members when the roll is rotated, means acting to reduce the pressure as the diameter of the roll decreases, and means to apply additional resistance when the machine is decelerated quickly.

12. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll, means tending to press the said friction members together to effect a'braking action on the roll, manually operated mechanism for adjusting the pressure of said friction members, means acting to reduce the pressure on the friction members when the roll is rotated, and a follower engaging the periphery of the roll and acting to reduce the pressure on the friction members as the diameter of the roll decreases.

13. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll and limitedly rotatable with respect thereto, means tending to press the said friction members together to effect a braking action on the roll, manually operated mechanism for adjusting the pressure of said friction members. means acting to reduce the pressure on the friction members when the roll is rotated, and a follower engaging the periphery of the roll and acting to reduce the pressure on the friction members as the diameter of the roll decreases.

14. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member operatably connected to the roll, means tending to press the said friction members together to effect a braking action on the roll, manually operated mechanism for adjusting the pressure of said friction members, means acting to reduce the pressure on the friction members when the roll is rotated, means to apply additional braking action when the machine is decelerated quickly, and a follower engaging the periphery of the roll and acting to vary the pressure on the frictionmembers and to vary the said additional resistance in response to variation in the diameter of the roll.

15. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll, adjustable means to press the said friction members together to resist the rotation of the roll, means to indicate the degree of resistance to rotation of the roll, and means acting to reduce the pressure on the friction members when the roll is rotated.

16. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll and limitedly rotatable with respect thereto, adjustable means to press the said friction members together to resist the rotation of the roll, means to indicate the degree of resistance to rotation of the roll, and means acting to reduce the pressure on the friction members when the roll is rotated.

17. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll, adjustable means to press the said friction members together to resist the rotation of the roll, means to indicate the degree of resistance to rotation of the roll, means acting to reduce the pressure on the friction members when the roll is rotated, and means acting to reduce the pressure as the diameter of the roll decreases.

18. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll and limitedly rotatable with respect thereto, adjustable means to press the said friction members together to resist the rotation of the roll, means to indicate the degree of resistance to rotation of the roll, means acting to reduce the pressure on the friction members when the roll is rotated, and means acting to reduce the pressure as the diameter of the roll decreases.

19. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll, adjustable means to press the said friction members together to resist the rotation of the roll, means to indicate the degree of resistance to rotation of the roll, means acting to reduce the pressure, on the friction members when, the roll is rotated, means acting to reduce the pressure as the diameter of the roll decreases, and means to apply additional resistance when the machine is decelerated quickly.

20. In a web roll controlling device for a printing machine, a firstfriction member held against rotation, a second friction member connected to the roll and limitedly rotatable with respect thereto, adjustable means to press the said friction members together to resist the rotation of the roll, means to indicate the degree of resistance to rotation of the roll, means acting. to reduce the pressure on the friction members when the roll is rotated, means acting to reduce the pressure as the diameter of the roll decreases, and means to apply additional resistance when themachine is decelerated quickly.

21. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll, adjustable means to press the said friction members together to resist the rotation of the roll, means to indicate the degree of resistance to rotation of the roll, means acting to reduce the pressure on the friction .members when the roll is rotated, and a follower engaging the periphery of the roll and acting to reduce the pressure on the friction members as the diameter of the roll decreases.

22. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll and limitedly rotatable with respect thereto, adjustable means to press the said friction members together to resist the rotation of the roll, means to indicate the degree of resistance to rotation of the roll, means acting to reduce the pressure on the friction members when the roll starts rotating, and a follower engaging the periphery of the roll and acting to reduce the pressure on thefriction members as the diameter; of the roll' decreases.

23. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll, adjustable means to press the said friction members together to resist the rotation of the roll, means to indicate the degree of resistance to rotation of the roll, means acting to reduce the pressure on the friction members when the roll is rotated, means to apply additional resistance when the machine is decelerated quickly, and a follower engaging the periphery of the roll and acting to reduce the pressure on the friction members as @e diameter of the roll decreases and to vary the said additional resistance in response to variation in diameter of the roll.

24. In a web roll controlling device for a printing machine, a first friction member held against rotation, a second friction member connected to the roll and limitedly rotatable with respect thereto, adjustable means to press the said friction members together to resist the rotation of the roll, means to indicate the degree of resistance to rotation of the roll, means acting to reduce the pressure on the friction members when the roll is rotated, means to apply additional resistance when the machine is decelerated quickly, and a follower engaging the periphery of the roll and acting to decrease the pressure on the friction members as the diameter of the roll decreases and to vary the said additional resistance in response to variation in diameter of the roll.

25. In a web roll controlling device for a printing machine, a gudgeon to which the roll is secured, a bearing for rotatably supporting the gudgeon, a braking device having a rotatable shaft in axial alignment with the gudgeon, a clutch secured to the shaft and adapted to engage with the gudgeon, and a follower bearing against the periphery of the roll; said braking device including coacting friction members one of "which is rotated by the shaft and one of which is prevented from rotating, a spring arranged to press the members together, and means connected to the follower whereby the pressure of the spring is lessened as the diameter of the roll decreases.

26. In a web roll controlling device for a printing machine, a gudgeon to which the roll is secured, a bearing for rotatably supporting the gudgeon, a braking device having a rotatable shaft in axial alignment with the gudgeon, a clutch secured to the shaft and adapted toengage with the gudgeon, 'means for moving the braking device parallel to the axis of the shaft to adjust the position of the web roll, and a follower bearing against the periphery of the roll; said braking device including coacting friction members one of which is rotated by the shaft and one of which is prevented from rotating, a spring arranged to press the members together, and means connected to the follower whereby the pressure of the spring is lessened as the diameter of the roll decreases.

27. In a web roll controlling mechanism for a printing machine, a gudgeon device including a gudgeon, a bearing adapted to rotatably support the gudgeon, and a braking device coupled to the gudgeon to retard the rotation of the roll; said gudgeon device including an expandable member having a rigid center section and adapted to fit within the core of the roll, a flange on the expandable member adapted to engage the end of the roll, and a spindle fitted to the said center section and having an expander arranged to act on the expandable member to secure the gudgeon device to the core.

28. In a web roll controlling mechanism for a printing machine, a gudgeon device including a gudgeon, a bearing adapted to rotatably support the gudgeon, and a braking device coupled to the gudgeon to retard the rotation of the roll; said gudgeon device including an expandable member having a rigid center section adapted to fit within the core of the roll, a projection adapted to engage a notch in 'the core, a flange adapted to engage the end of the roll, and a spindle fitted to the said center section and having an expander arranged to act on the expandable member to secure the gudgeon device to the core.

29. In a web roll controlling mechanism for a printing machine, a gudgeon device including a gudgeon, a bearing adapted to rotatably support the gudgeon, a braking device coupled to the gudgeon to retard the rotation of the roll, and means for moving the braking device to adjust the position of the roll in a direction parallel to its axis; said gudgeon device including an expandablemember having a rigid center section adapted to fit within the core of the roll, a flange adapted to engage the end of the roll, and a spindle fitted to the said center section and having an expander arranged to act on the expandable member to secure the gudgeon device to the gudgeon, a bearing adapted to rotatably support the gudgeon, a braking device coupled to the gudgeon to retard the rotation of the roll, and a clutch adapted to couple the braking device to the gudgeon or to disconnect it therefrom; said gudgeon device including an expandable member having a rigid center section adapted to fit within the core of the roll, a flange adapted to engage the end of the roll, and a spindle fitted to the said center section and having an expander arranged to act on the expandable member to secure the gudgeon device to the core.

31. In a web roll controlling device for a printing machine, a first friction member rotated by the roll, a second friction member held against rotation, means acting to press the friction members together when the machine is decelerated rapidily, and means governed by the diameter of the roll for regulating the pressure applicable to the friction members when the machine is thus decelerated.

32. In a web roll controlling device for a printing machine, first and second friction members held against rotation, a third friction member rotated by the roll, means acting normally to press the first friction member and the third friction member together to produce a tension on the web, and other means acting to press the second friction member into engagement with the third friction member when the machine is decelerated rapidly.

33. In a web roll controlling device for a printing machine, first and second friction members held against rotation, a third friction member rotated by the roll, means acting normally to press the first friction member and the third friction member together to produce a tension on the web, other means acting to press the second friction member into engagement with the third friction member when the machine is decelerated rapidly, and governing means acting with the changing diameter of the roll as it is unwound, for regulating the effective pressure of the coacting friction members.

34. In a web roll controlling device for a printing machine, first and second friction members held against rotation, a third friction member rotated by the roll, means acting normally to press the first friction member and a third friction member together to resist rotation of the roll, means acting to reduce the pressure on the first friction member when the roll starts to rotate,

and means acting to press the second friction member into engagement with the third friction member when the machine is decelerated rapidly.

35. In a web roll controlling device for a printing machine, first and second friction members held against rotation, a third friction member rotated by the roll, means acting normally to press the first friction and the third friction member together to resist rotation of the roll, means acting to reduce the pressure on the first friction member when the roll is rotated, and means acting with the changing diameter of the roll as it is unwound, for regulating the effective pressure of the coacting friction members.

36. In a web roll controlling device for a printing machine, first and second friction members held against rotation, a third friction member rotated by the roll, a first means acting normally to press the first friction member and the third friction member together to produce a tension on the web, a second means acting to press the second friction member into engagement with the third friction member when the machine is decelerated rapidly, and means governed by the diameter of the roll for regulating the pressure of the coacting friction members under the action of said first and second means.

37. In a web roll controlling device for a printing machine, first and second friction members held against rotation, a third friction member rotated by the roll, means acting normally to press the first friction member and a third friction member together toresist rotation of the roll, means acting to reduce the pressure on the first friction member when the roll is rotated, means acting to press the second friction member into engagement with the third friction member when the machine is decelerated rapidly, and means governed by the diameter of the roll for regulating the pressure of the coacting friction members.

38. In a web roll controlling device for a printing machine, a brake normally acting to resist rotation of the roll, means actuated by the initial rotation of the roll for reducing the resistance to rotation, and means for reducing the resistance progressively by the unwinding of the roll.

39. In a web roll controlling device for a printing machine, a brake normally acting to resist rotation of the roll, a second brake operated when the machine is decelerated quickly, means actuated by the initial rotation of the roll for reducing the resistance to rotation, and means for reducing the resistance progressively by the unwinding of the roll.

40. In a web roll controlling device for a printing machine, a brake normally acting to resist rotation of the roll, a second brake operated when the machine is decelerated quickly, means actuated by the initial rotation of the roll for reducing the resistance to rotation, and means acting with the changing diameter of the roll as it is unwound for regulating the action of both brakes.

41. In a web roll controlling device for a printing machine, a retarding mechanism having a rotatable shaft, a first brake member limitedly rotatable on the shaft, a second brake member that is prevented from rotating, a pivoted member adapted to press the first brake member against the second brake member, engaging means on the first brake member in engagement with cooperating means moving with the shaft, whereby the pressure of one brake member against the other brake member is reduced when the roll starts to rotate, an arm on the pivoted member, a pressure member movable along the arm to varying distances from the pivot axis of the pivoted member, whereby pressure on the brake member is varied, and means to move the pressure member along the arm as the diameter of the roll decreases when the web is unwound.

42. In a web roll controlling device for a printing machine, a retarding mechanism having a rotatable shaft, a first brake member limitedly rotatable on the shaft, a second brake member that is prevented from rotating, a pivoted member adapted to press the first brake member against the second brake member, engaging means on the first brake member in engagement with cooperating means moving with the shaft, whereby the pressure of one brake member against the other brake member is reduced when the roll starts to rotate, an arm on the pivoted member, a pressure member movable along the arm to varying distances from the pivot axis of the pivoted member, whereby pressure on the brake member may be varied, and a follower bearing against the periphery of the roll and arranged to move the pressure member relative to the arm.

Die

43. In a web roll controlling mechanism for a printing machine, a braking device arranged to resist rotation of the roll under normal running conditions and operable to provide additional resistance when the machine is stopped quickly, means for gaging the diameter of the roll and controlling the action of the braking device to gradually reduce braking force -as the roll is unwound and to regulate additional braking force applied to the roll when the machine is stopped quickly.

44. In a web roll controlling mechanism for a printing machine having a controller, a braking device arranged to resist rotation of the roll,