US1815179A - Web roll controlling mechanism - Google Patents

Description

July 21, 1931. H. v. BALL ET AL WEB ROLL CONTROLLING MECHANISM Filed Sept. 29, 1927 2 Sheets-Sheet l A-rfvs July 21, 1931. H. v. BALL ET AL WEB ROLL GON'ILROLLING MECHANISM 2 Sheets-Sheet 2 Filed Sept. 29. 192'? INYENTORS Patented July 21 1931 i d I UNITED. STATES PATENT OFFICE HARRY v. ALL, or conceal), massacnusnrrs, Am) ALBERT J. non'ron, or wrnrn rtanvs, NEW YORK, nssreuons To B. HOE & co, me, or NEW 2031;, N. 2., A coaronerronor NEW YORK WEB ROLL CONTROLLING mncnmsm Application filed. September 29, 1927. Serial No. 222,725.

This inventionrelates to certainlimprove ments in web roll changing mechanism for use 'withmulti-coupl'e rinting machines.

In certain modern igh "speed printing press constructions, the presses embody-a plurality of printing units each of which prints on a Web roll of paper, the webs being-delivered or associated in various ways to, produce the products required. In the operam tion of these. machines, a largenumber of copies are run oflt' and, the webs have t'o-be renewed from time -to time during each'runof the press: In operating these machines, it is, of course, of-great importance to .get out the desired number of products in the shortest time, and it is desirable, therefore,

that the operation of the presses shall be interfered with tothe least possible degree,

particularly during the renewing of the webs.

m The web, rolls used in these machines are supplied by the paper manufacturers in substantially the' sa'mesizes, so that when a press is supplied at the start of a run wlth aplurality of these rolls they will become depleted 1 5 at or substantially about the, sametime, so that frequently in a large press several of these rolls have. to be renewed at about the same period in the press run.

It is the especial object of the present in-.

3% vention to provide a construction in a multiroll machine, that is, a machine using at the same time a plurality of web rolls, by which 1 any desired plurality ofthese rolls-'mayhave $5 the expiring webs running therefrom united operation being conducted an entirely automatic manner, that is, new web rolls are joined or spliced to the old webs, the latter severed, and the new rolls placed in running position without necessitating any manual operation. y o

It is a further object of the invention to provide such a construction in' which automatic changing of the rolls is effected or controlled by the decrease in the size of any running roll to a predetermined diameter.

A further object of theinvention is to provide such a construction in which, in addition to the automatic changing'of therolls, means is provided for manuallyefiecting 9.

simultaneously with the new" web rolls, this manipulation of the roll changing mechanism in either direction in the case of an emergency or for convenience in loading, or

for any other desired reason.

With these and other objects not specifically referred to in view, the invention consists in certain-novel parts, arrangements and combinations which will be described in connection with the accompanying drawings and the novel features pointed claims hereunto annexed.

In these drawings, Figure 1 is an end'elevation showing more or less diagrammatically a plurality of roll changers and the circuits by which these out in the changers may be operated simultaneously in.

an automatic manner to paste a plurality of expiring webs and new rolls, and

Figure 2 is a similar view showing a modified form of roll supports for. the changers which maybe used instead of that illustrated inFi urel. I a

Re erring now to these drawings, the roll supports and the mechanism'for operating 4 the supports are indicated merely diagrammatically, as a detailed showing of allthe -mechanical connections whereby the parts are operated is unnecessary for an standing of the lnventlon.

Constructions embodying the invention,-

underlhowever, will include a plurality of roll supports each capacitated to support a spare may be brought into contact and the new' rolls thus pasted to the old webs, the old'webs then being severed, the arrangement being preferably such thatthe depletion of any one of the rolls in use to apredetermined point will automatically efiect the cycle of movements required to paste the newrolls to the running webs.

.The invention has been shown as embodied in two constructions. Referring first to the construction shown in Figure 1, there is provided a roll support in which the support is manipulated so as to complete a rotation roll and a roll running to the press, together to bring a spare roll from loading position to pasting and the running position shown, and on the depletion of the roll in running positionbac'k to loading position and to pasting and running position with a new roll. In the construction illustrated there is shown two of these roll supports, but it will be understood that as many supports may be provided as is necessary or desired for supplying any desired number of press units. These supports are or may be identical in construction and include standards 200, 201 in which are mounted shafts 202, 203. The shaft 202 supports an arm 204, in the opposite ends of which are bearings 205, 206 for supporting a spare roll S and a running roll R, the web from the running roll being indicated by the letter W, this web assing over a guide roll 207 to its press unit not shown). The shaft 203 supports a similar arm 208, in the opposite ends of which are bearings 209, 210 in which is supported a spare roll S and a running roll R The web from the roll R is indicated by W and runs to its press unit (not shown) over a guide roll 211. It will be understood, of course, that arms 204, 208 are duplicated on the other side of the machine. stood. that if desired roll supports capacitated to carry more than two rolls may be used as necessary or desired.

The shafts 202, 203 are operated through suitable motors and circuits so that they may be simultaneous-1y and automatically rotated on the depletion of either the running web roll R or the running web roll R to move the web rolls S, S into engagement with the webs W, W for pasting these new web rolls to the webs, the movement of the support continuing until the new web rolls are in the de. sired position for normal running 'to the press, that is, in the position shown in Figure 1, when the movement of the shafts is automatically stopped until the new web roll has in turn become depleted. While the constructions for effecting this may be somewhat varied, that shown in Figure 1 is a satisfactory one. As shown in Figure 1, full web rolls are indicated in both running position and loading position with the webs running from the upper web rolls or those marked R, R Referring to the changer shown at the left of Figure 1, there is provided a controller arm B which rests on the surface of the roll and follows the roll as the roll de creases in size, this arm being mounted on a It will also be under-.

cause the shaft to turn to the right, through 7 conductor 65, upper closed contacts 66 of relay R, conductor 67 to the negative side of the line 68. The support, upon turning, causes cam F on the shaft 202 to move past the arm of switch G which is thus allowed to make contact with a contact H. This contact completes a holding circuit for relay R, which circuit extends from line L conductor 2, winding of relay R, through the upper closed contacts K and J, conductor 5, contact H, switch G, conductors 6 and 4, upper normally closed contacts of push button PL to line L. It will thus be seen that as the switch G is in be opened without interrupting the holding parallel with the switch C the switch C can circuit through the relay R, provided they switch G is closed.- The support continuing its rotation will cause switch C to open first,

but the motor 64 will remain energized in this circuit and will not stop until a second cam F on the shaft 202, strikes switch G and opens the holding circuit, which stops the motor with the parts in the position shown in Figure 1,

With the circuits asdescribed, the roll support is automatically turned to the right, as shown in Figure 1, and this automatic movement of the support will always be to the right. Under some circumstances, it may be desirable to effect a manual control of the support, either to the right or to the left, as,

varied. As shown, however, the manually operated push buttons PR and PL are provided, and a relay L. The relays R and L together constitute a reversing switch mechanism for the motor 64. When the relay R is energized, the motor operates to turn the support to the right and, when the relay L is energized, the motor operates to turn the support to the left. I

The automatic control of the motor to the right is as has been described. For manual operation of the support in the right hand direction, as indicated by arrow A, push button PR isoperated. The closing'of this but ton completes a circuit extending from line L conductor 2, winding of relay R, conductors 3 and 7 lower closed contacts of push button PR, conductor 8, back to line L As long'as the push button is held down the support will rotate in a right hand direction.

' If it is desired to rotate the support to the left, push button PL is closed, completing a circuit from line L conductor 2,

through the winding of relay L, conductor 9, lower closed contacts of push-button PL and back toline L As long as this button is held down the support will rotate towards the left or in the opposite direction to arrow A, as shownin Figure 1. .The circuit for this may be traced as follows: From positive line 60,-through conductor 212, upper contacts 213 of relay L, conductor 214, through winding of motor 64, conductor 215, lower contacts 216 of relay L,-conductor 217, con-f ductor 67 to the negative side of the line 68.

It will be observed that the path of the current is in a direction opposite to that follows when relay R is operated.

It will be understood that the support on the shaft 203 is operated in'the same way and that a motor circuit and motor similar to that already described is provided for this changer. In accordance withthe invention, meansare provided whereby the exhaustion of. the running roll in either changer will cause the simultaneous and automatic mo'vement of both changers, so that the running, webs are pasted or spliced-to the new or spare rolls. Referring again to Figure 1,in Which the circuits for this are illustrated with a type of roll support which has a complete rotary movement, the following mechanism andcircuits are illustrated.

For the simultaneous operation ofthe sevf eral supports, switches M and M and tieline T are provided; With the running roll'R previously referred to, exhausted and switch C closed, an additional parallel circuit is completed from line L upper closed contacts of push button PL, conductor 4, switch arm C and contact E, conductor 7, upper closed contacts of push button PR, conductor 10, through switch M, conductor T, through switch M conductor 110, upper closed contacts of push button PR conductors 107 and 103, winding of relay R conductor 102 to line L The single web roll being exhausted thus energizes both relay R and relay R the circuit for relay R being the same as previously traced, thus turning both roll supports, and renewing both web rolls at. thesame time, and, of course, these connections can be extended to operate any desired number of web roll supports.

Relay L may be operated independently of relay L by depressing push button PL -whereupon a circuit extends from line L, conductor 102, winding of relay L, conductor 109, lower closed contacts of push button PL to line L Relay. L, which is energized in this circuit, completes an energizing circuit for" a controlling motor and circuit (not shown) similar to motor 64 to turnthe support towards the left. -,The support may also be independently controlled tactsof push button PL. .Relay R .push button PR sociated.

to rotate towards the right by depressing push button PR whereupon a circuit is com pleted trom line L conductor- 102, winding of relay R conductors 103 and4107, lower *0 contacts of push buttonPR to line L Re lay R controls at itscontacts an'energizing circuitfor the motor in such a way that the support is rotated towards "the right, the -circuits being similar to those described with respect to relay R.

Automatic operation may be efiected un derthe control of the supportishown tofthe rightin. Fig. 1. For instance when' arm B resting on: the surfaceof web rollR carries armQ- into contact with contact E, a circuit is automatically completed for relay R extending from line L conductor 102, relay R conductor 103, contact E arm G pivot D conductor 104,-closed contacts of push button PL to line L. This energizes the '85. support control motor similar .to motor 64,

causing the support to rotate around to. the 3 right to replace the-roll; A holding circuit 7 for relay R is completed as soon as cam F passes switch G which holding circuit extends from line L over-- conductor 3102,-

through winding of relay R through its I upper'closed contacts K and'J, conductor.

105, contact H switch-G, conductors 106 and 104, to line L through the upper corii W1 also be energized under these conditions if switches M and .M areclosed; The circuitior this relay is traceable from line L conductor,2, winding' of relay R, conductors 3 and 7,,u'pper contacts of push button PR, conductor'10,switch M, line T,- switch M conductor 110,.upper contacts of conductor 107 contact E fined, it may be desirable-to employ-a type a of web roll support which has'an oscillating or swinging movement, and means are providedfor simultaneously and automatically operating this type of support to paste or splice a plurality of new .web rolls to the webs runningto the press units, such an arrangement being shown in Figure 2.

. In; the construction shown in this there is provided for each unit a roll changer,

in the form of anoscillatifigsupport or rack, two of these supports being shown, marked U and V. Thesesupports are similar in construction and are capacitated to carry a runningweb roll and a spare web roll, and

, and the support includes a pair of bent arms 226, 227 which carry, in their ends, journals 228, 229 for supporting a running roll R and a spare roll S the web from the running roll B being indicated by W. Similarly the support or rack V comprises a pair of bent arms 230, 231 which carry supports 232, 233 for a running roll R and a spare.

roll S the web from the running roll being indicated by W*. The arms 230, 231 are supported on a shaft 234 suitably supported in any desired framework.

In the best constructions, the mechanism hereafter described is operated by the decrease in the running roll to a predetermined size, an actuator, contacting with the roll surface, being used for operating the connections. This actuator, of course, may be of various forms, but inthe construction shown it is in the form of a roll 235 which has a sliding movement in a groove 236 in a fixed frame,.indicated at 237, one of these actuators being employed for each roll position of each roll changer. These actuator rolls 235 are freely movable in the guides and, contacting with the web roll surface, follow the web rolls as they decrease in size and operate, at a certain predetermined point in the depletion of the running web 4, certain switches and circuits.

Referring to Figure 2, as soon as the left hand roll R on support or rack U is exhausted, switch W will be operated by actuator roll 235 to close its contact, com pleting a circuit from line L conductor 31, relay L, conductor 32, contact 33 on switch Z conductor 34, contact 39 on switch Y, conductor 35, upper contacts of push button PR conductor 36, contact of switch W conductor 37 to line L Relay L comprises the circuit to turn the support or rack to the left in order to bring the new roll into pasting position against the running web W It will be understood that the start of the movement of the rack to the left will cause the pin 42 to close the switch Z at con-r tact 43, in preparation for the operation of,

break the circuit at contact 40. When 38 operates 238, 42 closes Z at 43.

It will be understood, however, that a motor, similar to motor 64, and a circuit therefor, similar to that already described in connection with Figure 1, are provided to operate the support or rack U a sufiicient distance to bring the roll S to which adhesive has previously been applied, into contact with the running web W and make the paste.

When the right hand roll S becomes exhausted, a switch X, by means of one of the actuating rolls, closes its contact and a circuit extends from line L, conductor 31, winding a relay R conductor 46, contact 40 on switch Y conductor 41, contact 43 on switch Z, which would then be closed, conductor 35*, upper contacts of push button PL conductor 36*, contact of switch X, conductor 45, to line L The motor is thus energized to turn the support or rack U to the right to bring the new roll, which has been loaded into bearin s 228, into position v to be pasted to the running web at the right.

At the same time, pin 38* on rock arm 227 will have acted on arm 239 of switch Z to open the circuit at contact 43, thus de-energizing relay R and stopping the motor. However, the lower arm 239 of switch Z will have moved far enough to engage contact 33, establishing a connection extending from line L, through conductor 31, winding of relay L, conductor 32, contact 33, arm 239 of switch Z, conductor 35, upper contacts of push button PL, conductor 36*, contacts of switch X, conductor 45, to line L The support or rack is thus returned to its normal running position, being stopped by the action of pin 42 engaging the arm 239 of switch Z and breaking the contact 33. The push button PR provides a manual circuit for operating the motor in the right hand direction, the circuit extending from line L conductor 31, winding of relay R conductors 46 and 47, lower contacts ofpush button PR conductors 48 and 37 to line L. Push button PL is closed to turn the rack to the left, the circuit for relay L being traced from line L conductor 31, winding of relay L conductor 44, lower contacts of push button PL conductor 45 to line L When a number of the supports or racks are to be controlledsimultaneously, as for instance U, V, etc), tie-lines T and T and switches 49, 49 and 149 and 149 etc. are

provided. Assuming 'switchW to close upon the exhaustionof the left hand rollR of rack U, an. additional .circ it parallel to that above traced is establishai from lineL conductor 37, switchW conductors 36 and 50, switch 49, tie-line T switch 149, conductor 150, upper contacts-of push button PR conductor 135', switch Y contact 139, conductor 134, switch Z contact 133, conductor 132, relay L conductor 131 to line L Relay L is energized to energize the motor (not shown) to move the support or rack V to the left or counter-clockwise in synchronism with rack U. Pin 138, on'arm 230, acts I on arm 240 of switch Y to open the circuit at contact 139, de-energi'zing relay L and stopping the;motor. The lower arm 24() of switch Y will also have moved far enough to engage contact 140, establishing a, circuit that extends from line L through conductor 131, relay R conductor 146, contact 140, arm 240' of switch Y conductor 135, upper contacts of push button PR conductor 136, switch W },'which at this time is closed by the actuating roll 235 associated: with this switch, conductor 137 to line L The energization of relay It moves the support or rack back or clockwise to normal running position, pin 138 engaging the arm 240 of switch Y to break the circuit at contact 140'.

.When the right hand roll S carried in the support or rack U, is depleted to the predetermined point, the supports U, V are both simultaneously operated to paste or join new web rolls which are loaded into the positions R and R to the webs running from the rolls in positions S S and the circuit for efiecting this may be traced as follows: A switch X, similar to the switch W, is provided, and this switch is operated by an actuator roll 235 associated therewith, the operation of the support lo-ting in this instance, clockwise.- The circuit for this may-be'traced as follows: The switch X having been closed by the actuator roll, a circuit-is completed from line D, conductor 31, relay R conductor 46, contact 40, conductor 41, contact 43, switch Z, then closed, conductor 35 upper contacts PU, conductor 36, switch X to line L this circuit energizin relay R and operatlng support or rack to the right. Support or I rack V is simultaneously operated to the right through a circuit which may be traced from line L through switch 'X, conductor 36, switch 49*, tie-line T switch 149 conductor 136, through the upper contacts of push button Pl conductor 135 contact 143, now closed, switch Z conductor 141, contact 140 of switch Y conductor 146 to relay R conductor 131', back to line L With this circuit therefore both relays R and R are energized and the supports or racks are moved clockwise simultaneously to pasting position.

Duringthis movement, the pins 38 and 138 have contacted with the arms 239, 239 of switches Z, Z breaking the circuits at the contacts 43' and 143 and de-energizing the relays R 'and- It, thus stopping the motors, it being-understood that a motor and circuit, similar to the motor 64 and its circuit, pre-' circuit through contact 33 and 133 forthe v-iously-described, are provided for operating the support or rack V. The downward movementof the switch arms 239, 239 of the switches Z, Z? have, however, completed a relays L L The circuit for relay L is the 145 to line L In accordance with the invention, means are proVided, as' before stated, whereby the depletion of a roll in either of the supports 01 racks U, V will act to automatically operate to efiect the pasting operation of all the supports or racks. Consequently,, there are shown "circuits whereby the depletion of either the. roll R or the roll S shown in the support or rack V'at the right of Figure 2, will effect this automatic past-ing.

\Vhen the right hand roll S of support V for instance becomes exhausted, switch X closes its contact through the action of the actuator roll 235 associated therewith, completing a circuit from line L conductor 131, winding of relay R conductor 146, contact 140 on switch Y conductor 141, contact 143 on switchlz now closed, conductor 135 upper contacts of pushlbutton PL conductor 136, contacts of switch X (which are now closed), conductor 145 to line L The motor associated with supportor rack V is thus energized to turn the support or rack V to the right, bringing the new web. roll in position B into position for. pasting. At the same time, pins 38 and 138? move switches Y and Y respectively to engage contacts 39 and 139 in preparation for the operation of changing rolls in positions R R Simultaneously, pin 138 will have acted on switch Z to open the circuit at contact 143, thus tie-energizin therelay R and stopping the motor; .owever, the lower arm 239 of switch Z will move far enough to engage contacts 133, establishing a connection extending from line L conductor 131, winding of relay L conductor 13 2, contact 133 of switch Z conductor, 135 upper contacts of push button PLF, conductor 136", closed contacts of switch X conductor 145 to line L The support or rack is thus re-' turned counter-clockwise to its normal running position, being stopped by the action of pin 142 engaging the switch Z and breaking the circuit at contact 133. Push button PR provides a-manual control for operating the motor in a right hand direction, the circuit therefor extending from line L conductor closed contacts of switch X conductor 136, switch 149*, tie-line T switch 49", conductor 36*, upper contacts of push button PL conductor 35, contact 43 of switch Z, now closed, conductor 41, closed contact 40 of switch Y conductor 46, relay R conductor 31 to line L Assuming the roll R? at the left hand posi tion of support or rack V to be exhausted, the automatic movement of this support or rack counter-clockwise to paste anew roll at position S to the web W running from the roll R is effectedby the action of actuator roll 235 operating to close switch W through the following circuit From line L, conductor 137, closed contactsof switch W conductor 136, upper contacts of push button PR conductor 135, contact 139 of switch Y conductor 134,-contact 133 of switch Z conductor 132, relay L conductor 131 to line L. Through this the relay L 7 energizes the motor to turn the support or rack to the left. This turning movement of the support or rack causes the pin 138 to depress the arm 240 of switch Y breaking the contact at 139 and de-energizing the relay. The downward movement, however, of arm 240 of switch Y has made a circuit at contact 140 of switch Y which energizes the relay R to turn the support or rack to the right or clockwise to its normal running position throu h a circuit, which may be established as fo lows: From line L conductor 131, relay R, conductor 146 contact 140 of switch Y arm 240 of switch Y conductor 135, upper contacts of push button PR ,-conductor 136, switch W now closed, conductor 137 to line L The support or rack V may be manipulated to the right or the left manually for purposes of slight adjustments for convenience in loading and the like, b the manually operated push buttons PR L", the push button PL when its lower contacts are in circuit energizing the relay L, and the push button PR when its clockwise.

lower contacts are in circuit energizing the relay R the relay L turning the support or rack counter-clockwise or to the left, and the relay R turning the rack or support clockwise or to the right, as shown in Figure 2, these circuits being similar to those already traced.

The depletion of the roll It acts to automatically rotate the support or rack V counter-clockwise and to simultaneously effect the movement of the support or rack U in the same direction, so that the webs of the new rolls S S are pasted or spliced to the rolls W WV running from the rolls R R The circuit for effecting this may be established as follows: from line L conductor 137, closed contacts of switch WV, conductor 136, conductor-150, switch 149*,tie-line T switch 49*, conductor 50, conductor 36, upper closed contacts of push button PR conductor 35, contact 39 of switch Y, conductor 34, contact 33 of switch Z conductor 32 relay L conductor 31 to line L The relays L and L are energized to turn the supports or racks to the left or counter- This turning movement causes the pins 38, 138 to'engage the switch arms 238, 240 of switches Y and Y breaking the circuits at 39 and 139. This movement of the switch arms, however, makes a circuit at contacts 140 and 40 of switches Y and Y thus establishing a circuit similar to that already traced for energizing the relays R and R manner, either by hand or from a controlling part of the press. As for instance, if a unit were to be discontinued from use, the switch could be connected to the coupling member employed for coupling the unit to the main drive shaft of the press.

It will be observed that with the construction shown and described, a wholly automatic changer has been devised for simultaneously effecting the pasting or splicing of a plurality of webs to a plurality of new rolls,

the mechanism for effecting this being controlled by the decrease in the size of any running roll to a predetermined point.

The mechanism for severing the expiring webs after the paste has been made may be of any suitable character and such a severing means has been indicated at 250 in Figure 1 and 251 in Figure 2, it being understood that this mechanism is moved out of the way after the oldweb is severed.

While the invention has been shown and described in its preferred form, it will be understood that as to certain of its features it has been designed for and can be used with other types of roll supports and, of course, with other circuits for controlling the various mechanisms whichmight'be devised with movement of the support, and tie circuits for causing the simultaneous operation of the relays.

2. In a web roll renewer, the combination of a plurality of movable supports each capacitated to support a web roll running to the press and a spare web roll, a relay and circuit for each support for controlling the movement'of the support, any of said relays being controlled by the depletion of any running web roll, and tie circuits for causing the simultaneous operation of the relays.

3'. In a web roll renewer, the combination of a plurality of movable supports each capacitated to support a web roll running to the press and a spare web roll, a relay and circuit for each support for controlling the movement of the support, tie circuits for causing the simultaneous operation of the relays, and a second relay for each support and circuits therefor for independently operating the relays.

4. In a web roll renewer, the combination of a plurality of movable supports each capacitated to support a web roll running to the press and a spare web roll, relays for each support, circuits for efiecting the automatic and simultaneous operation of the relays, second relays for each support, and manually controlled circuits for efi'ecting the independent operation of the second relays.

5. In a web roll renewer, the combination of a plurality of movable supports each capacitated to support a web roll running to the press and a spare web roll, relays for each support, circuits controlled by the depletion of any running web roll for effecting the automatic and simultaneous operation of" the relays,.second relays for each support,

and simultaneous operation of the relays in one direction, second relays for each support, and manually operated circuits for controlling the relays to efiect an independent movement of the supports in the opposite direction.

' 8. In a web roll renewer, the combination of a plurality of movable supports each capacitated to support a web roll running to the press and a spare web roll, a separate motor and circuit for each support for controlling the movement of the support, any of said motors being controlled by the depletion of any running web roll, and tie circuits for causing the simultaneous operation of the motors.

9. In a web roll, renewer, the combination of a plurality of movable supports each capacitated to support a web roll running to the press and aspare web roll, a motor for operating each support, a relay and circuit for each motor for controlling the motor,

and tie. circuits for causing the simultaneous operation of the relays.

10. In a web roll renewer, the combination of a plurality of movable supports eachcapacitated to support a web roll running to the press and a spare web roll, a motor for operating each support, a relay and circuit for each motor for controlling its movement,

any of said relays being controlled by the depletion of any running web roll, and tie circuits for causing the simultaneous operation of the relays.

- In witness whereof, we have hereunto set our hands.

HARRY V. BALL.

ALBERT J. HORTON.

and manually controlled circuits for eifecting the independent operation of the second relays.

6. In a web roll renewer, the combination of a plurality of movable supports each capacitated to support a web roll runningto the press and a spare web roll, relays for each support, circuits for effecting the auto,- matic and simultaneous operation of the relays in one direction, second relays for each support, andcircuits for controllin the secand relays to efiect a movement of the supports in the opposite direction.

7. In a web roll renewer, the combination of a plurality of movable supports each capacitated to support a web roll running to the press and a. spare web roll, relays for each support, circuits for efiecting the automatic

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