US2097053A

US2097053A - Web pasting mechanism for printing presses

Info

Publication number: US2097053A
Application number: US435122A
Authority: US
Inventors: William A Zalesak
Original assignee: GOSS PRINTING PRESS CO Ltd
Current assignee: GOSS PRINTING PRESS Co; GOSS PRINTING PRESS CO Ltd
Priority date: 1930-03-12
Filing date: 1930-03-12
Publication date: 1937-10-26
Anticipated expiration: 1954-10-26

Description

Oct. 26, 1937. w. A. ZALESAK 2,097,053

WEB PASTING MECHANISM FOR PRINTING PRESSES Filed March 12, 1930 2 Sheets-Sheet 1 INvENToR Oct. 26, 1937. w. A. ZALESAK 2,097,053

WEB PASTING MECHANISM FOR PRINTING PRESSES" Fild March 12, 1930' 2 Shets-Sheet 2 INVENTOR.

Patented Oct. 26, 1937 WEB PASTING MECHANISM FOR. PRINTING PRESSES William A. Zalesak, Schenectady, N. Y., assignor to The Goss Printing Press Company, Chicago,

Ill., a corporation ot !Ilinois Application March 12, 1930, Serial No. 435122 32 Claims.

My invention relates to control devices, more particularly to control devices for web renewing machinery for printing presses.

One methodemployed' for renewing the web after a roll has become exhaus'ted is to move a fresh web roll toward the rmning web and paste 'the running web to the new fresh roll from which the web is then fed to the press. Before the fresh web roll is brought into contact with the running web, it is brought up to press speed by means of friction belts or the like as is well known in the art; The running web roll from which the web is supplied to the press andthe fresh web roll are supported in a rotatable or pivoted support, thereby permitting movement of the fresh roll toward the running web. After the paster has been made between the running web and the fresh roll; the running web is broken between the fresh roll and the exhausted roll,` and the web thereafter is fed from the fresh roll alone.. v

Va rious means have been developed for the purpose of performing the above Operations automatically. such devices are more orless complicated and employ cams and mechanical levers and like methods. eElectrical means have been employed to a more or less limited extent. The

apparatus heretofore developed performs automatically one or more of the Operations in making a paster but requires manual operation at u one or more stages during the pasting operation and the services of the attendant.

- An object of my invention is to provide a novel and fully automatic web renewing mechanism for making what is known-in the art as a flying paster which requires only the insertion -of pasted fresh rolls into the roll suppo t of the web renewing mechanism.

Another object of my i'nvention is to provide A making the paster, cutting the expiring web and applying a brake to the exhausted web roll and for thereafter controllingthe speed of the web to the press. The `electricalcircuits to which these electrical devices are connected are 'ener- 'only when in contact with the fresh roll.

I the following description when considered in connection with the accompanying drawings and the scope will be pointed out in the appended claims. v

In the accompanying drawings, Fig. 1 represents one position of the web renewing mechanisin; Fig. 2 represents another position of the web renewing mechanism; Fig. 3 is a detailed showing of a. switch mechanism and magnetic brake; Fig. 4 is a cross sectional View of the controlling members; Fig. 5 is a front View of the brush supporting member; Fig. 6 represents the electrical circuits for the control device; Fig. 'I V shows a modification thereof; Fig. 8 is a showing of the contact supporting member; Fig. 9 is a detail of the web cutting mechanism.

Referring to Figs. 1 and 2, the stand sup-' ports the reel2| rotated by means of an electric motor (notshown) in which are mounted the running web roll 22, the fresh web roll 23, and the exhausted roll 24. These rolls are rotatably supported in the bearings 22'. The speed-up mechanism 25 may be driven from the press in any suitable manner and is provided with a friction 'belt or -belts 25' which contact with the fresh web roll for rotating the same. In my device this belt is connected to be driven fromthe press by means of a magnetic clutch mechanism The running web is designated bythe numeral 221. A hanger frame 21 supports the pasting device 28 and the pivoted frame 26 von which 'is mounted the rotating belt 26" for controlling the rotation of the running'web roll 22. "I'his controlling belt or belts, a plurality may be used, is driven in any suitable manner at press speed. The electroresponslve knife means for severing the web from the running web roll is also mounted on the pivoted frame 26.

In Fig. 2, the app'ar'atus is shown in the process of making the paster. The speed-up mechanism is shown in contact with the fresh roll 23 'for driving the same and the pasting device is shown pressing the running web against the surface of the rotating fresh web roll for the purpose of energized from the lines L and L 2 by means of the relay BI. The purpose of introducing the relay is to prevent the contact members 5land 52 from carrying heavy current.

The motor is energized to rotate the reel in the following manner. Referring to Fig. 3, it will be seen that a web roll is supported by means of the' rotatable shaft which is mounted in the' bearings 22' carried by the arms of the reel. Mounted on the top of this bearing is an automatic switch means which closes when the roll becomes exhausted. v

In the preferred embodiment of my invention this switch mechanism consists of a base 3! which supports the member 32. Slidably mounted in the support 32 is the member 33 which is urged V against the web roll by means of the spring 33'.

Mounted in the fork portion 39 of member 33 is the rotatable member'35 which contacts with the web roll. At the other end of the slidably mounted member 33 is the portion 33 which cooperats with the slidablyand pivotally mounted member 31 carrying at one end thereof a contact -39 which cooperates with the contact 90 for the purpose of energizing the motor M to rotate the reel. The member 31 carries a spring 38 which urges the member 31 in an upwardly direction against the element 33. When the web roll becomes depleted so that the member 33 may b'e urged to the right by spring 33', the portion 35 thereof forces the member 31 down. W-hen the portion 36 has passed the pointed portion of the member 31 in its movement to the right, the spring 38 then causes the member 31 to pivot in a counterclockwise direction about itspivot 32' .with a snap action since the .spring causes the member 31 to slide quickly upward on the other side of portion 36 and thus rotate in a counterbrushes Mi' and are in contact with the contacts'52 and 5l, the action of which will be described below, a completed circuit through the relay El will energize themotor M to rotate the reel. The circuit controlling members which carry the contacts and the brush members which cooperate therewith will `now be described by referring to Fig. 4. i

The contact carrying disk 43 of insulating material is rigidly secured to the stand 29 by means of bolt 43' and carriesthe

contact members

5l, 52, 56, 51, 58, 59, 50, 53, and 55 as shown in Figs. 4, 6, and 8. This disk is mounted on the left side of the reel looking in the direction of the arrow in Fig. 2. Obviously it could be mounted on the other side. As shown in Fig. .6, these contact members are connected electrically to the various electrical parts of the web renewing mechanism.

v The contact members 5! and 52 areconnected in the relay circuit 5! for energi'zing the motor M. The contact members 55 and 51 are connected to the pasting means. 28.` ;The contact members 53 and 55 'are connected to the magntic clutch means 25 for efl'ecting rotation of the speed-up mechanism 25 when the speed-up belts 25' are in contact with the fresh web roll.

Contacts

58 and 59 are connected to the magnetically operated knife member 29 carried on the frame 25, and

shown in' detail in Fig. 9.

In Fig. 9, the knife 29 ispivotally supported in a mounting supported by the frame 25. The electroresponsive means 29' when energized rotates the knife mechanism 29 to sever the running web 22' between the fresh roll and the expiring web roll. The control belt for the rmning web roll is shown at 26'.

Contact 69 is connected to the line La and with #contact 59 connected to lineL furnishes a cirprevents further rotation of the running web roll I after the paster has been made.

The member for completing the electrical cir- L cuits to the various parts of the device consists of a disk of insulating material M keyed to the reel shaft 2l' and in which are mounted the brush members 65', 96', 51', 48' and 49', see Figs.

4, 5, and 6. These brush members are urged into c contact with the contact members carried by the insulated member 93 by means of the spring 59. A cable C carries the conductors which connect with the brushes 65', 46'; 48' and 49' with the knife mechanism and magnetic brake mechanism which are carried from the reel arm. This brush mechanism of course rotates with the reel. In rotating with the reel, it makes the desired connections through the contact members to produce the web pasting operation.

- This' brush carrying disk 44 has three sets of identical brushes thereon, one set for each roll carried by the reel, it being understood that each roll is supplied with' a switch and a brake. It

will also be understood that the brushes make contact with the contact members for completing the electrical circuits in a predetermined order `as will-be described below; .As has been pointed o'ut, brush contacts 46'and 45' cooperate with the contact members `52 and 5! to complete a circuit through the relay 61 when switch 31 is closed. The brush member: 41' cooperates with the

contacts

56 and 51 to complete a circuit' tact members 53 and 55. This same brush-mechanism 48' at a later stage cooperates with'. the

contacts

58 and 59 to close the circuitthrough the knife mechanism 29and the 'contact members 59 and 50 cooperate. with the brushes49' and 481. at thesame timqto eomplete a circuit through the magnetc brakemech'anism fll which is carried on the reel shaft;

, The operation of my device is as follows: When the apparatus is in the position showni Fig; 1,

the brush contacts cooperating with th`e'r'`nn'in`g web roll 22 have the position shown in Fig. 8, in the first position as showngby the full line.

It is, of course, understood that 'when the run ning web roll is full that the switch mechanism carried by the arm of the reel supporting this web roll is in the open position, as shown in Fig. 3. It will be observed, by reference to Fig. 6, that the circuit to the relay Bl is open and that therefore the motor M is not rotating the reel supporting the web rolls. When the running web roll 22 reaches an exhausted condition, the switch ,mechanism will operate to close the circuit `;through relay El. It will then be seen that a ;circuit is completed through the switch mecha- `ism, brush 45', contact 5| to the relay SI, ;through the contact member 52, the brush means 43', back to the switch. This, of course, energizes the relay to close the circuit for the motor M. The reel is then started to rotate in a clockwise direction to bring the fresh roll into contact with the running web.

As the reel rotates in a clockwise direction, the brush means 48' comes into contact with the contact members 53 and 55 as shown by the first positionof dotted lines in Fig. 8. This, of course, completes the circuit through the mechanism 25 which starts the speed-up mechanism' into operation by connecting to some part'of the press or to' a separate source for rotating the belt 25'. This takes place just about the time that the fresh web roll reaches the position of the speed-up mechanism. The fresh web roll is then started to rotate.

As the reel continues to rotate in a clockwise direction, the brush member 41' comes into contact with the

members

56 and 51, as shown by 'the second position in dotted line in Fig. 8. This completes a circuit through the magnetically operated pasting means 28 and it operates to push the running web against the surface of the fresh web roll as shown in Fig. 2. It is understood that paste has been applied to the fresh roll on its insertion into the reel support. It will be noted that the speed-up belts are still in contact with the fresh web roll and still continue to rotate the fresh web roll.

Further rotation of the reel brings the brush member 48' out of contact with contacts 53 and 55 and into contact with the

contact members

58 and 59 and the brush member 49' into contact with the contact member 60, as shown by the third position of dotted lines in Fig. '8. Thus, simultaneously, a circuit is completed through the knife mechanism 29 by means of the contact member 48' cooperating with the

contact members

58 and 59 and a circuit is also completed through the magnetic brake mechanism. Thus, the web between the fresh web roll and the expiring web roll is severed, as shown in Fig. 9, and the magnetic brakeis applied to prevent further rotation of the expiring web roll The pasting means 29 is still energized for the purpose of insuring a good paste and the magnetic brake is energized a slightly longer time than the knife mechanism to insure that the roll is properl braked.

As the reel continues to rotate in a clockwise direction, the contact members 41', 48','and 49' pass out 'of contact with the contact members with which they cooperate, thus opening the circuit through the various devices 'which they control. It will be noted, however, that the Contacts 46' and 45' still complete the circuit through tacts pass out of contact with the contact members 5l and 52 and stop rotation of the reel by deenergization' of the motor M, the next group of brush members for the fresh roll 23 will. then be in a position 'shown by the first position of the brush members in Fig. 8. Of course, the switch which cooperates with the fresh web roll 23 which is now in running roll position, is open. The second set of brush members are then in a position to complete the cycle of operations just described when the fresh web,roli now in running roll position becomes exhausted.

In some cases, it might be desirable to slow down the speed of the press while making the pasting. The means for ac'complishing this is shown in Fig. 7 which is a modification of part of the circuit shown in Fig. 6. The press motor M for driving the press has in series therewith a current limiting resistor 64 which is normally short circuited by means of the relay 63 during the operation of the press and while the paster mechanism is in normal running position. The relay 63 is in series with the electroresponsive means for energizing the ciutch 25 to start the speed-up roll( Thus, as the reel rotates to bring the fresh roll against the running web, the brush member 48' completes the circuit across the contact members 53 and 55 to complete a circuit through the electroresponsive clutch mechanism and the relay 63. This, of course, energizes the speed-up'belt and at the same time energizes the relay 63 to open the contacts across the resistor 54, thereby placing the resistor in series with the motor and reducing the speed of the press motor. Of course, the relay 63 is energized only so long as the speed-up belts are energized. The press could be slowed down in the same manner by placing the relay 63 in series with the pasting device 28, thus slowing down the press so long as the paster mechanism is energized.

As used in the claims, the expression "web renewing operation" includes rotating the webroll supporting reel, rotating the fresh web roll, contacting the running web with the fresh web roll and severing the expiring web from the exhausted web roll.

The embodiment of the invention illustrated and described herein has been selected for the purpose of clearly setting forth the principles' involved. It will be apparent, however, that the invention is susceptible of being modified to meet the different conditions encountered in its use and I, therefore, aim to cover by the appended claims all modifications within the true spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. A web renewing mechanism for a printing press having a rotatable reel supporting a running web roll in the running roll position and a fresh web roll, electroresponsive means for rotating said reel to move the fresh roll toward the running web to make the paster and thereafteto running roll position, a source of power, a circuit controlling device connected to control the' supply ofpowerto ;said` electroresponsive meansup'n depletion of the 'running roll to rotate said reel, electrically controlled means for making the paster, a stationary contact means" i to which said electroresponsive means' and pasting means are connected, a brush carrying'member rotating with said reel, saidbrush carrying member cooperating with said contact means to control the supply of power to the electroresponive means and .the pasting means connected thereto in a predetermined order for renewing .the web.

2. In a web renewing mechanism for a printing press for transferring a'running webfrom a running web roll to a fresh' web roll, the combination of means for rotatably suporting a plurality of web rolls including a running web roll and a fresh web roll, electrically controlled means for moving a fresh web roll to running position,

electrically controlled means for bringing the fresh web roll to running speed, electrlcally controlled means for pasting the running web to the fresh web roll; a circuit eompleting means automatically operated in response to exhaustion of the running web roll for initiating web renewing Operations, a source of power,-a circuit completing device, circuits connecting said electrical means and said circuit completing device, and a means v in operative relation with said circuit completing means and cooperating with said circuit completing device to' control energization. of said electrica] means in a predetermined order to transfer the running web from the running web roll to the fresh web roll.

3.- In a web renewing mechanism for a printing press for transferring a running web from a running web roll to a fresh web roll, the combination of means for rotatably supporting a plurality of web rolls including a running web roll and a fresh web roll, electrically controlled means for moving a fresh web roll to running position,- electrically controlled'means for bringing the fresh web roll torunnin'g speed, electrically controlled means for pasting the running web to the fresh web roll, electrically actuated means for severng the running web from the running roll, a

circuit complting means' automatically operated I in response toexhaustion of the running web roll for initiati'ng web renewing operations, a circuit completing device, 'circuits connecting said electrical means and said circuit completing device, and ameans in operative relation with said circut completingmeans and cooperating with said circuit completingdevice-to control energization of said electrical means in a predetermined order to transfer the running web from the running web roll to the fresh web roll.

4. In a web renewing mechanism for a printi'ng V press fo'r transferring a: running web from a running web roll to a fresh web roll, the combination of ineansfor rotatably supporting a plurality of web rolls including `a running web roll and a fresh web roll, electrically* controlled means formoving a fresh web rollto running position, electrically controlled means for bringing the fresh Web roll to running`speed,electrically controlled means for pasting the running xweb to the fresh web roll, electrically controlled means for severing the running web fromthe running roll and electrically controlled brake means for the running roll; a'circuit completing means automati-` callyoperated in response to exhaustion of the running web roll for initiating web renewing operations, a circuit completing device, circuits connecting said electrcal means and said circuit completng device, anda device in operative rela- `tion with said circuit completingmeans and co- Operating with said circuit co'mpleting device to control energization of said means in a predetermin'ed order -to transfer the running web from the running web roll to the fresh web roll.

5. In a control' device fora webrenewing mechanism employing a rotating reel', the combination member, circuits supplied with hating in said member for conpower 'nd trolling the web renewing mechanism, and a device movable with the reel for controlling energization of the circuits in a predetermined order for controlling all of the several web renewing Operations.

6. In a control device for a web renewing mechanism employing a rotating reel, the combination of stationary contact carrying member, electrical circuits supplied with power and for controlling the web renewing mechanism terminating 'in said contacts, and a brush member carried by the reel and movable therewith for closing said circuits in a predetermined manner to control all of the several web renewing Operations.

7. In a web renewing mechanism, the combina-- tion of a rotatable support for rotatably supporting an active web roll and a reserve web roll,

' by the press, a cluth controlled by the position of the reserve roll for transmitting power to rotate said reserve roll and meansforengaging. said clutch only when the reserve roll and friction means are in contact.

9. In a web renewing mechanism, the combination of meansfor rotatably supporting an active web roll and a reserve web roll, a press driven belt contact-,ing with a web roll in reserve position, a cluteh through which the belt is driven and electromagnetic means for engaging' said clutch only when a roll is in reserve position.

10. In a web renewing mechanism, the com-- bination of movable means for rotatably supporting an active web rolland a reserve web roll, brake means Operating n the axial portion of the web roll and means timed by the movement of the support for applying said brake to the exhausted roll.

11'. In a 'web renewing mechanism, the com bination of means for rotatably supporting a plurality of web rolls, a device movable relatively to said web rolls and engaging the end of a web roll and a switch controlled by said device'. v. 12. In a web renewing mechanism, the combination ofrotatable supporting means for rotatably supporting a plurality of web rolls, means engag- 'ing the ends of the web rolls and individually' movable axially of said rolls', means for moving said movable means and a control member operated by movement of said movable means axially of 'said rolls. V

13. In a web renewing mechanism, the combi- ,nation of means'for rotatably supporting' aplus rality of web rolls which are successively movable into a predetermined position, a roller rolling on the end of one of theweb rolls and movable axially of the roll on which the roller rolls, spring means for moving said roller and a switch controlled by bodily movement of. said roller.

14. The combination with a switch adapted to control a circuit for' any desired purpose, of a shoe, yielding means for holding the shoe against the end of a web roll, means connected with the shoe for controlling the switch, and means for automatically Operating the switch when the web roll reaches its .predetermined minimum diameter and the shoe roll.

thereby slips over the end of thei 16. A web renewing mechanism employing a running web roll in running roll position and a fresh web roll, means for moving said fresh roll toward the running web to form the paster and thereafter to running roll position, means for rotating the fresh roll to web speed before making the paster, means for pasting the running web to the fresh roll, means for severing the web from the running roll, electrical circuits and a source of power for supplying power to eifect operation of said means, a switching mechanism controlling all of said circuits, means for Operating said switching mechanism by movement of said fresh roll to web renewing position, means for braking the running roll, controlled by said switching mechanism and means responsive to depletion of the running roll for initiating movement of the fresh roll.

17. A- control device for web renewing mechanism having a rotatable web roll support, comprising an electrical contact device'non-rotatably mounted on the support, electrical circuits connected to a source of power and to said nonrotatable device and to the web renewing mechanisin for controlling web renewing Operations, and a circuit closing device mounted to rotate with said roll support and cooperating with said contact device to close`said circuits, said device closing said circuits in a predetermined order to effect the complete web renewing Operations.

18. A web renewing mechanism for a printing press having a rotatable reel supporting a running web roll in a running roll position and a fresh web roll, electro-responsive means for rotating said reel to move the fresh roll toward the running web to make the paster and thereafter to running roll position, a source of power connected to said electro-responsive means, a circuit-controlling device for controlling the power supplied to said means for rotating said reel upon depletion of the running roll, electrically controlled means for making the paster and switching mechanism for controlling the supply of power to said electrically controlled means to energize said means in a predetermined order for renewing the web, said switching mechanism being operated by rotation of said reel, and means for slowing down the press to make the paster.

19; In a machine for feeding a web to a printing machine and splicing it, the combination with a movable web roll support and means for operating it.to move the webrolls, of electric means for controlling the motions of the support to bring the running rolls successively and repeatedly from the running position into position to direct the web therefrom closely adjacent to a fresh roli preparatory to splicing the running web to the fresh roll; electric means for diverting the running web against the pasted fresh roll for pasting, electric means for applying a, brake to the exhausted stub, and electric means for severing the web laterally from.. the .stub,.the last three electrc means being controlled by the first named electric means. e

20. In 'a machine for feeding a web to a printingmachine and splicing it, the combination with a movable web roll supportand means for operating it'to move the webvrolls, of electric means for controlling thernotions of ,thesupport to bring the running rolls successively and repeatedly from the running position into position to direct the web therefrom closely adjacent to a fresh roll preparatory to splicing the running web to the fresh roll, electric means for diverting the running web against the pasted fresh roll for pasting, electric means for ap'plying a brake to the exhausted stub, and electric 'means for severing the web laterally from the stub, the last three electric means being controlled by the first named electric means.

21. In a. web supply mechanism for a machine having a controller, a rotatable support for a plurality of web rolls, means for rotating the support to bring the rolls successively into running position, a belt for accelerating the rotation of a web roll, pulleys arranged to support the belt, a magnetically operated driving connection for one of said pulleys, and control means for said driving connection operated by the rotation of the support.

22. In a web supply mechanism for a machine having a controller, a rotatable support for a plurality of web rolls, means for rotating the support to bring the rolls successively into running position, a belt for accelerating the rotation of a web roll, pulleys arranged to support the belt, a magnetically operated driving connection for one of said pulleys, and control means for said driving connection 'operated by the rotation of the support and by a switch electrically connected with the controller.

23. In a machine for feeding aweb to a printing machine and splicing it, the combination with a movable web roll support and means for Operating it to move the web rolls, of electric means for controlling the motions of the support to bring the running rolls successively and repeatedly from the running position into position to direct the web therefrom closely adjacent to a fresh roll preparatory to splicing the running web to the fresh roll, means for pressing the running web out of its normal path against the pasted fresh roll for splicing, electro-magnetic means for Operating the last named means, and means controlled by the first named electric means for automatically starting the electromagnetic means to actuate the web pressing 24. In' a web supply mechanism, a rotatable web roll support provided with rotating mechanism and adapted to rotatably carry a running roll and a replacement roll, control means for said rotating mechanism mounted on said support, a relay controlling said rotating mechanism and controlled by said control means, said control means and relay serving to initiate rotation of the support when the running roll is of a predetermined reduced diameter and continue said rotation until the replacement roll is in a desired position.

25. In a web supply mechanism, a rotatable web roll support provided with rotating mechanism and, adapted to rotatably Carry a running roll and 'a 'replacement roll, and control means for said rotating mechanism mounted on the support, a relay controlling said rotating mechanism and controlled by said control means, said. controlmeans and relay servingto initiate rotation of the support when the running rolI is reduced to a. predetermined 'diameter and continue said rotation until the replacement roll is in running position.

26. In a webfsupply mechanism a web, roll stand,"a rotatable web roll support provided with rota ing mechanism and adapted to rotatably 6 v support a running roll and a replacement roll, a. motor for rotating the support, a member mounted on the support and adapted to move in controlled thereby -for rotating the roll support to move the replacement roll until the periphery of the replacement .roll reaches a position near the web running from the running roll, and means controlled by the rotation of said support when the nmning roll approaches' exhaustion for pressing the web therefrom against the replacement roll to make the join.

28. In a websupply mechan'isn a web roll stand. a rotatable support -for a running web roll and a replacement web roll, a control switch a commu tator member electrically connected to the con troi switch, a 'brush holder member, one of said members being held against rotation, the other being rotatabl with the support and 'one of the members being supported by 7 the stand, and brushes carried by the brush.holder movable 'axially of said support and eng'aging with the commutator; V I

29. In a web' supply mechanism a web roll stand; a rotatable support tor a running web roll' and a replacement web roll, a control switch, a `'commutator member and a brush holder member.

one of which is Secured to the stand and the other of which is mounted on the support to rotate therewith and brushes-carried by the brush holder ;movable axially of said support and engaging with the commutator; the member that is Secured to the stand being electrically connected to the control switch.

30. In a web supply mechanism a web roll i tand. 'a rotatable web roll carrier adapted to ro- 'tatably support a running roll and a replacement roll, a motor for rotating said carrier, means engageable with the-running roll 'for starting said motor when the running roli is reduced to a predetermined diameter, a brushen said support and means on the said stand contacting with said brush to interrupt the power supplied to .the motor to stop rtation of the carrier when said means and brush lose contact.

31. In a web renewing mechanis'm, the cambi-- tion oi the supporting means.

' wLuAM A. ZALESAK.