US2260830A

US2260830A - Start-up device for roll changers

Info

Publication number: US2260830A
Application number: US194908A
Authority: US
Inventors: Allan J Cline
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-03-09
Filing date: 1938-03-09
Publication date: 1941-10-28
Anticipated expiration: 1958-10-28

Description

ocpzs, 1941. A. J. CLINE f 2,260,830 y ai I l ocgzs, 1941. A. J. LINE 2,260,830

START-UP DEVICE FOR ROLL CHANGERS Filed March 9, 1938 '7 Sheets-Sheet 2 O .f7 f3 i f4 @El l 2242 275g# 222 .3 l /7222/671 (IMT r o (l 225 f m @2me 2/ 3yc-O ZQf Oct. 28, 1941. A. J. vCLINE 'START-UP DEVICE FOR ROLL GHANGERSv Filed March 9, 1958 7 Sheets-Sheet 3 N MNNMMM/AM'MV.

wwwww .mwN-l v NQ Oct. 28, 1941. A. J. CLINE START-UP DEVICE FOR ROLL GHANGERS Filed March 9, 1938 7 Sheets-Sheet 4 Oct. 28, 14941. A. J. CLINE START-UP DEVICE FOR ROLL CHANGERS '7 Sheets-S1166?l 5 Filed March 9., 1958 Oct. 28, v1941.

A. J. CLINE START-UP DEVICE FOR-ROLL CHANGERS Filed March 9, 1938 '7 Sheets-Sheet 6 ,OV:t.v28, 1941. A. J. CLINE l START-UP DEVICE FOR ROLL ICHANGERS Filed March 9, 1958 7 Sheets-Sheet 7 MMN Patented Oct. 28, 1941 UNITED STATES ,PATENT OFFICE 2,260,830 START-Ur DEVICE Fon RoLLoHANGERs v Allan J. Cline, Chicago, Ill. Application March 9, 193s, serial Nh.r194,9os

1S Claims. (C1. 242-58) This invention relates to web roll changing apparatus employed in connection with printing presses for connecting the web ofan expiring roll to that of a full roll, and more particularly to a device for starting rotation of the full roll pre- -paratory to making a paster between the new and old webs whereby the feed may be changed from one roll to the other withoutv stopping the press.

In accordance with the usual practice, the new or reserve roll is prepared for the making of a paster by placing glue or other suitable adhesive on the surface of the roll near the end of mately equals that of the runningweb.l Consequently, in some types of roll changing apparatus complicated mechanism is provided for'rotating the roll from the spindle on which it is mounted so that it can be rotated a number of times before being brought into contact with the expiring web. In other forms of roll changers it has been necessary to start rotation of the' roll by hand and throughv the 4action of the running web thereon after the new roll has been brought into contact with said web, it being obvious that in such case the roll can only rotate a partiall revolution before the paster is made and the speed of the web, and consequently of the press, must be accommodated to the speed which can ,be obtained in a partial revolution of the roll. y My invention relates to a mechanical device for giving a powerful rotative impulse to the roll to overcome the inertia thereof and bring it up to a substantial speed in considerably less than one revolution, after which the action of the running web thereon brings it up to its linear speed before the revolution is completed, thusmaking it possible to effect successful pasters without greatly, if at all, slowing down the press.

It is an object of the invention to provide a device of this character which is eflicient and largely automatic in action and which is usable effectively under ordinary conditions prevailing in a newspaper plant without requiring extraordinary skill on the part of the workmen who are responsible for operation of the roll changing apparatus.

A further object of the invention is the provision of a device for the purpose stated, which Aacts upon the end of the roll which is an accessible and practical place for the rotative force to be applied.

Another, object of-the invention is the provision of a device of this character which can be readily applied to the ordinary press sub-structure and yadjusted to operate in connection with rolls of different length. f

Still another object of theinvention is to provide a roll starting devicewhich can be brought into contact with the roll and released therefrom by manual control under certain conditions but which, when the paster operation is in progress, Y

will be automatically maintained in contact with the roll and will be released therefrom at exactly ,the right time after the roll has been brought to desired speed.

A further object vis the provision of a roll starting mechanism which is,automatically conltrolled andcaused to operate by movement of the new roll into the web proceeding from the f expiring roll. c v

-In the preferred embodiment of the invention .shown inthe drawings compressed air is emfployed as the motive force for actuating the roll 30V roll vengaging element into contact with the roll propelling mechanism and also for moving the and maintainingthe Contact during the positive portion of the operating cycle.

- A further object of the invention is to provide eflicient valve controlling mechanism designed to admit the air to the parts controlled thereby and yto release the same at the exact time required, the control being to a considerable extent automatic and the several control elements 40 being-so coordinated as to effectively obtain the desired results. c

The roll engaging element of the device is so mounted and its movement so controlled that it isheld in engagement with a particular point on the end of the rollduring the period of contact and there will be little or -no tendency for said element to slide off the arc of rotation of saidpoint.

Other objects and advantages of the invention will be apparent from the following detailed description, taken in connection with the accompanying drawings wherein I have shown the preferred form in which I have thus far contemplated applying the principles of the invention.

Referring to the drawings:

Fig. 1 is a view partially in section taken from one end of a reel on which three web rolls are adapted to be mounted in the usual manner, the device of my invention being shown in side elevation;

Fig. 2 is an enlarged detail view of a lfragment of one end of one of the reel arms shown in Fig. 1, and fragments of the mechanism adapted to be operated by an operating finger or projection carried by each of the reel arms;

Fig. 3 is an elevational view of the reel structure and associated parts being taken transversely through the press sub-structure and being partially broken away for the sake of compactness;

Fig. 4 is an enlarged detail view showing a porcontacting element and associated parts taken substantially on the section line 8-8 of Fig. 6; Fig. 9 is a plan View of the starting mechanism, being shown in reverse position from that shown in Fig. and illustrating certain additional parts; Fig. 10 is a side elevation of the mechanism shown in Fig. 9, said mechanism being viewed from the side opposite that shown in Fig. 6;

Fig. 11 is an end elevation of the pneumatic drive unit showing the cylinder head and the associated conduits and valve mechanism;

Fig. l2 is an enlarged transverse sectional View of one end of the starter carriage taken, substantially on the section line 2-| 2 of Fig. 6;

Fig, 13 is a plan view of the operatingv mechanism for certain of the valves employed in the device;

Fig. 14 is a side elevation of the same; and

Fig. 15 is a detail view of certain parts shown in Fig. 13, showing the position of said parts when the starter crosshead is in its extreme ad- L vanced position.

The illustrative embodiment of the invention shown in the drawings comprises an adjustably mounted unit 2| supported in cross supporting members 22 positioned beneath the press frame 23 and upon arms 24 and 25. respectively, formed upon frame uprights 26 comprising parts of the press sub-structure.

Web supporting reels are mounted in said substructure and comprise a center shaft 21, on the opposite ends of which are mounted spiders 28, each formed to provide three roll supporting arms 29 adapted to support web rolls identified, respectively, by the numerals 3|, 32 and 33. Each roll is supported between corresponding opposed arms of the respective spiders, being held in place by means of `chucks 34 extending into hollow shafts or spindles extending through the center of the rolls, said chucks being locked in place to rotatably support the rolls in a manner which is well known in the art. The reel is adapted to be rotated to change the position of the reel arms and the rolls Acarriedthereby by means of a motor and gear mechanism mounted in

housings

35, 35 and 31 shown in Fig; 3 of the drawings. As shown in Fig. 1, the web 38 is being drawn into the press from the roll 3| which has nearly expired, said web extending over rollers 39 and 4| around a floating roller 42 carried by arms 43 pivotally mounted upon a shaft Si i) 44, the web proceeding upwardly from the iloating roller 42 into engagement with a guide roller 45 and thence into the press.

A tension strap 46 is mounted to contact with the active roll to control the speed of rotation thereof, said strap being anchored at its lower end to spring bolts 4'| positioned in a pit or other suitable location beneath the reel and at its other end extends around a wind-up cam 48 mounted on a cam shaft 49, said tension strap, of which there may be several across the width of the roll, having brush sections 5| against which the pasters are made in a manner which will hereinafter appear. The normal running position of the active roll 3| is indicated in dotted lines in Fig. l, as are the normal positions of the

rolls

32 and 33. vIn making a paster the reel is rotated to bring the rolls to the full line positions shown in Fig. 1, in which positions, as will be noted, the reserve roll 32 is moved against the web 38, bowing the latter outwardly and pressing the same against the tension straps 46, as will hereinafter appear.

A cut-off device generally indicated by the reference numeral 50 is provi-ded for severing the web of the expiring roll after the paster has been made. While any suitable or preferred cut-off mechanism may be employed for this purpose, reference may be made to Patent No. 2,086,068

for a disclosure of a satisfactory cut-off mechanism.

The roll starting mechanism is mounted in a carriage 52 comprising spaced ways 53 secured by screws 54 to spaced brackets 55, each of which has a T-shaped head 5B carrying two pairs of rollers 5'| disposed between pairs of channel members comprising the cross supports 22, the lower anges 58 of said channel members serving as rails upon which the rollers 51 travel when the carriage is adjusted toward or away from the web roll. Each bracket portion 56 is provided with an ear 59 apertured to receive a locking pin 6| extending through registering openings 62 in the channel members of the cross supports 22.

Said roll starting mechanism includes a crosshead, indicated generally by the numeral 63, slidably mounted in the carriage 52, a pneumatic Adrive unit indicated generally by the numeral 64, xedly mounted in one end of said carriage, and a roll engaging unit carried by the crosshead 63.

The crosshead assembly is illustrated in detail in Figs. 5, 6, 9 and l2. Referring rst to Fig. 10, it will be observed that the crosshead cornlprises a casting 66 which is roughly rectangular in shape and is disposed in a vertical plane between the ways 53 and the ends of the rolls 3|, 32, 33.

Mounted in bosses 61 formed in the casting G6 near its four corners, respectively, are studs 68 on which are journalled rollers 69 (see Figs. 6 and 12). The rollers 69 are rollingly engaged between the opposed faces of rail flanges 1| formed in the ways 53, whereby the crosshead 63' is. supported by the ways for traveling movement longitudinally thereof. The horizontal counter-thrust of the roll engaging unit 65 against the crosshead 63 when exerting pressure against the end of the roll 32, is sustained by the rolling engagement against the vertical faces of the ways 53, of rollers '|2 mounted on studs 'I3 that are xed in vertical bosses 14 forming the ends of the crosshead casting 66. When the roll engaging unit 65 is not in operation, the crosshead is maintained in position relative to the ways 53 by vertical bars 15, secured by screws 16 to the ends of the studs 13, the ends of the bars 15 being slidably engaged against the faces of the rail flanges 1| opposite the rollers 12. l

The roll engaging unit 85 comprises an arm 11 (see Figs. 10 and 12) pivoted at one end upon a horizontal stud 18 mounted in a boss 19 formed on the crosshead casting 66, so that it may swing vertically. Near its free end, the arm 11 is formed with a transverse cylinder 8| in which is mounted a piston 82 (see Fig. 8) having in its head a depression defined by an annular flange 83. A circular pad 84 of resilient material, such as soft rubber, mounted in the depression, serves to frictionally engage the end of the roll 32.

The vertical swinging of the arm 11 allows the pad 84, while in engagement with the end of the roll 32, to describe an larc of movementcoaxial with the axis of the roll while the crosshead 63 moves horizontally. In order that the pad may follow the changing inclination of the radius of the roll on which it is engaged, the piston 82 is rotatable in the cylinder 8|. Thus the pad 84 may remain in xed engagement with the roll during the entire period of contact.

Referring particularly to Figs. 9 and 10, it will n be seen that rollers 85 mounted on studs 86 fixed in bosses 86' formed on the crosshead casting 66 on axes that are radial with respect to the arm pivot 18, serve to sustain the counter thrust of the arm 11 under pressure of the pad 84 against the roll 32 while allowing the arm 11 to freely swing vertically, said rollers being engaged by an arcuate end portion 90 on the arm 11.

In order to avoid any tendency of the pad to slide off its arc of movement during the starting impulse it is important that in locking the pad against the roll it engage the roll each time at the same distance from the roll axis. But it is possible to lock the pad against the roll in any of several positions of longitudinal movement of the crosshead, and the distance of the crosshead from the roll axis will vary with each of these positions. Accordingly, means is provided for supporting the arm 11, when the pad 84 is not engaged against the roll, in proper position for engagement with the roll, such means including an arcuate cam 81 (see Figs. 10 and 1), the ends of which are secured to the lower way 53, a roller 88 adapted to travel on the cam 81, and an arm 89 on one end of which the roller 88 is journalled by means of a stud 9| secured on the arm.

'Ihe other end of the arm 89 is curved at 92 around the pivoted end of the arm 11 and which is pivoted upon a stud 93 secured in an ear 94 formed on said arm 11.

A plunger 95 is secured at one end in a stud 96 pivoted in the arm 89 near the free end thereof. The other end of said plunger is slidably mounted in a boss 91 formed on the arm 11, and the medial region of the plunger passes through a coil spring 98 which is compressed between the stud 96 and the boss 91. The parts are so arranged that the roller 88, riding againstl the cam 81 as the crosshead moves longitudinally` will raise and lower the arm 89 so as to maintain the pad 84 approximately at a uniform distance from the axis of the roll 32 at all times when the pad is not engaged with the roll. When the pad is engaged with the roll, the arm 89 will be allowed to swing so as to conform to the arc of movement of the point Where the pad is engaged,

ooi

oi of the cam v|31 Whenever necessary to compensate for any variations that may occur between the curvature of the cam and the path of movement of said roller 88 which would correspond to the arc of movement of the pad 84. The upper end of the plunger 95 is'secured against escape from the boss 91, by means of a head 99 on the plunger.

Referring now to Fig. 8, the cylinder 8| is closed behind the piston 83 by a cylinder head |0| secured to the cylinder by cap screws |02 (see Fig. 6). The central region of the head |0| is formed with ar sleeve |03 which at its outer endjis attached to an elbow |04. A nipple |85 "connects the elbow |04 to a ilexible tube |06 which communicates with a source of air under pressure. 'I'he piston 82 is provided with a pisrton rod |01 one end of which is rigidly secured in the `central region of the piston. 'I'he rod |01 extends through the sleeve |03 and on its other terial securedl to its rear face by a clamping ring I|4 andscrews ||5 extended through apertures in the ring and threaded into the piston. The skirt 3 serves to seal behind the piston the compressed air which is injected into the` cylinder through the flexible tube |08.` The air enters the cylinder through the sleeve |03, passing through openings ||6 in the guide collar |08 and through openings ||1 and the opening ||2 in the inner end of the sleeve |93.- Under the pressure of air thus injected, the piston will move forwardly in the cylinder to bring the pad 84 into engagement with the end of the roll 32. The coil spring, which has been placedjunvderrcompression by this advancing movement,

will return the cylinder and pad to inoperative lposition when the air pressure is released.

The sleeve |03 extends through an opening A|||l (Figs. 6 and 10) in the crosshead casting 66, and is adapted to contact, at the upper and 'lower limits of movement of the arm 11, a pair of resilient cushioning buffers ||9 mounted in bosses |2I in the casting 66.

The other end of the tube |06, as shown in Figs. 6 and 10, is connected to a release valve |22 mounted in a bracket |23 on the crosshead Ycasting 66 near the axis of the arm pivot 18 so thatrthe tube |06 may flex as the arm 11 moves up and down in a region that is intersected by said axis. The release valve |22 serves, at the proper time, to release the air from the cylinder 64.

Referring now to Figs. 6 and 7, it will be noted that air reaches the tube |06 through a pipe line |23, one end of which is connected to the valve |22 through a return bend |24 and the other end of which is bent upwardly as at |25 and connected by means of an elbow |26 to a lateral passage |21 (see Fig. '7) formed in a boss |28 in the crosshead casting 66. Thev passage |21 communicate's with a longitudinal passage |29 which in turn communicates with an opening the spring 98 allowing said arm to yield upwardly relative to the arm 11, or the roller 88 lifting |3| in an end member |32 of atube |33 lmounted at one end in the boss |28 in the end of the crosshead` oasting66, the tube |33 extending into the main cylinder 64 of the pneumatic drive unit previously described. It may be noted at this point that the tube |06, release valve |22 and pipe line |23 all move with and form part of the crosshead assembly. The tube |33 forms part of a telescoping air supply line connecting this movable crosshead assembly to the stationary portion of the air system.

The tube |33 enters the cylinder 54 through a central opening |58 in the cylinder head |35, which is adapted to receive the forward end of the collar |42 as the piston approaches ythe end of its driving stroke. pulse, the piston 4| will expel the air in the cylinder 64 between said piston and the headfl35, rst through said opening |58, and, near the end of the stroke after the collar |42 has entered said opening |58, through a needle valvel |59, which is adjustable by means of a cap screw 16| to vary the rate of release of the air, so that a proper quantity of air may be trapped in the cylinder to properly cushion the end of the piston stroke.

Each of the valves |22, |65 and |14 includes an operating sleeve |83 (see Figs. 6 and 13), having an annular groove |84 for engagement by a fork of an operating lever, and is of a type well known in connection with air-brake equipment, being so desiged that when its operating sleeve is moved in one direction air from the supply line is allowed to ow to the cylinder served thereby, and when said sleeve is moved in the opposite direction the supply of air is shut 01T the sleeve at the limit of movement in the latter direction establishing communication between the cylinder and the atmosphere so as to bleed the cylinder, i. e., release the air therefrom.

The control rod |85 is operated by the movement of the reel arms 29, as the roll 32 is moved into the web 38. On the end of each arm 29 (see Fig. 2) there is secured, by screws |94, a bracket |95 to which is attached by screws |96 an operating finger |91 projecting radially with respect to the reel axis. On the rod |85 is a trigger arm |98 which has at one end a sleeve |99 through which the` rodl |85 extends, and by means of which the arm is slidably mounted on the rod ybetween collars 20| and 202 fixed on the rod (see Fig. 14). A trigger finger 203, positioned to be engaged by the operating lingers |91, is pivoted at 204 on an ear 205 on the trigger arm |98 and adjustably associated therewith by engagement with an adjusting screw 206 threaded through the arm.

Movement of the trigger arm |98 under the engagement of the trigger finger 203 by the operating nger |91 on a reel arm 29 is transmitted to the rod |85 by a coil spring 201 positioned on said rod |85 and engaged between the collar 20| and the collar |99. The spring 201 provides for full opening of the valve |65 without injury to any of the parts.

Moving of the crosshead 63 to the retracted position shown in Fig. 1, is also effected by the operating ngers |91 on the reel arms. An arm 208 is pivoted near one end .between a pair of ears 209 on the crosshead 66, on a pivot pin 2|| (see Fig. 6), and is supported by the engagement of its upper end 2|2 with an adjusting screw 2|3 threaded through a boss 2|4 on the casting 66 in a position projecting diagonally downwardly into the path of movement of the ngers |91. Its free end is formed with a shoulder 2|5 defining one side of a notch 2|6 into which the nger |91 is adapted to move when the crosshead is at its extreme advanced position at the right end of the carriage 52 as viewed in Fig. 1. As the roll 32 is moved into the web 38, the engagement of the iinger |91 with the shoulder 2| 5 will carry the arm 208 and with it the crosshead 63 to the retracted position, said arm 268 yielding upwardly as the nger |91 swings upwardly,

and following downwardly as the finger swings past the peak of its arc. When the crosshead has reached the fully retracted position, the arc of movement of the operating fingerl |91 will pass below the level of the lower extremity of the shoulder 2I5 in the lowermost position of the arm 288 as determined by contact with the screw 2I3. Thereupon the cross head will be released.

A slight further movement of the reel will cause the finger |91 to engage the trigger` finger 203, operating the valve |65 to inject compressed air into the cylinder V64 so as to cause the piston I 4| and with it the crosshead 63 to be driven forcibly to the right.

The valve |14 (see Figs.V 11 and 13) which is for the purpose of admitting air to the cylinder BI of the roll engaging unit, is controlled by a rod 2|1 slidably mounted in certain of the brackets |86 behind the rod |85. A bell crank lever 2 I8, similar in construction and arrangement to the lever |81, and associated parts, transmit movement of the rod 2I1 to the operating sleeve |83 of the valve |14 so that'when the rod- 2|1 is moved to the left, as viewed in Fig. 13, the valve |14 will be operated to admit air to the cylinder 8|; while at the limit of movement of the rod 2 I1 to the right the valve |14 will be operated to release air from said cylinder 8|. Manipulation of the valve to either of these positions may be accomplished manually by a hand lever 2|9 (see Fig. 3) secured to one end of a square shaft 22|. The other end of the shaft 22| is slidably extended through a squared opening in one end of an operatnig lever 222 (see Fig. 4). The shaft 22| is journalled in a bracket 223 secured to the' frame 23 of the press adjacent the hand lever 2I9 and in a pair of spaced bearings 224 on the bracket 55 at the lright end of the carriage 52 as viewed in Fig. 1. 22| extends under `and parallel to` the forward supporting rail 22, and, as the carriage 52 is adjusted beneath the rails 22, the operating lever 222 -will be moved along the shaft 22| by the bearing 224.

Movement of the operating lever 222 caused by rotation of the shaft 22|, is transmitted to the 7 rod 2I1 .by a fork 225 on the lower end of the lever, engaged between spaced collars 228 secured on the rod 2I1 (see Figs. 13 and 14).

Manual control of the valve |14 is supplement- The shaft end of the carriage l52. In this position, the engagement of the trigger 221 by the projection 234 holds the rod 2|1 in its extreme position to the right, maintaining the valve |14 in air-releasing position with the roll engaging pad 84 retracted, so that it is impossible for the operator to lock the pad against the roll. This assures the roll being free to rotate when there is4 occasion to manipulate it, as when the adhesive isbeing applied. By rotating the reel until the crosshead starts to be retracted, the trigger 221 is freed between the projections 234 vand 235 so that the operator may lock the pad against theV roll or release it at will, by manipulation of the valve This provision for manual control at this stage is important, since the operator will find it preferable to maintain the adhesive coated surface of the rollin a position about as indicated at 238 in Fig. 1, locking the pad against the roll toassure its remaining in that position, until lhe is ready to start the paster operation, when he will release the roll, rotate it until the pasted surface is at about the position indicated at 239 and then again lock the pad againstthe roll. 'I fhe reason `for maintaining the pasted surface at or nearwthe point 238y isto avoid its being contacted by the web 38 in the event the latter breaks and drops downwardly onto the roll 32. It will be understood that the adhesive will beapplied sufiiciently in advance of the exhaustion of roll 3| to leave the operator plenty of time to effect the subsequent operations withoutbe'ing rushed.

ed by partial automatic control, provision for which is embodied in a trigger 221 pivoted at 228 to the lower side of the lower way53 (see Figs.

13 and 14). The trigger 221 has an oval shaped central region engaged between two collars 229 slidable on the rod 2|1, and having an aperture extending from side to side, through which the rod 2I1 extends. The collars 229 are engaged between two coil springs 23| which in turn are confined between two collars 232 xed on the rod 2 I 1. These springs assure movement of the valve control sleeve to its two extreme positions with-` out injury to the parts. The trigger 221 has a Wedge-shaped nose 233 adapted to be engaged by

projections

234 and 235 extending laterally from

legs

236 and 231 projecting downwardly from the crosshead casting 66. The projection 234 has a relatively wide engaging face, adapted to ride upon and remain in engagement with the nose 233 of the trigger 221 as shown in Fig. 15, while the projection 235 has a narrow engaging face and is adapted to deiiect the trigger 221 in passing, in the direction of its movement.

In the position shown in Fig. 15, the crosshead is at its extreme advanced position at the right When the paster operation is once started', however, the operation proceeds automatically. The electric motor mechanism, indicated generally at 35 to 31, when its circuit is closedby a control switch (not shown), rcauses the reel to revolve in ay counter-clockwise direction, as viewed in Fig. 1, carrying the-roll 32` into the web 38 and simultaneously retracting the crosshead 63. If the operator has not already locked the pad 84 againstlthe roll, this will be'automatically effectedwhen the crosshead has been retracted a short distance by the engagement of the trigger 221 by the projection 235, moving said trigger to the left to the position shown in Fig. 13 and moving the rod 2 I1 to the left, thereby operating the valve |14 to admit air to the cylinder 8|.

The valve |22 serves to quickly release the pressure fromv the cylinder 8|' just prior to the end of the forward or drivingY stroke-of the crosshead. Unlike the valves I65.and |14 it is provided with a spring 24|y which tendsto move the operatingsleeve |83 tofair-releasing position. The sleeve is normally restrained'from reaching this position, however, by a bell crank lever 242 pivoted at 243 onan ear 244 projecting from the crosshead casting 66, having at one end "a fork 245 engaged with the sleeve |83 and at its'other end a fork 246 in which is journalled a roller 241 which rides against the underside of the upper way 53 of the carriage 52. Just prior to the end ofthe driving stroke of the crosshead, the roller 241 will ride under an elongated opening 248in y so as to cause the block, which has a weight 250 on the top thereof, to resume its full line position in which its lower face is flush with the rlower surface of the way 53, and simultaneously a latching bar 252, longitudinally slidable in yokes 253 on the upper face of the way 53, will be moved to a position projecting over the end ofthe block 249 so as to prevent the latter from again yielding upwardly until the crosshead is approaching the end of the next driving stroke. This is accomplished by a projecting finger 254 secured to the top of the crosshead casting 66, engaging against a lug 255 on the latching bar 252, just after the roller 241 has passed the pivot 25|. When the crosshead reaches retracted position, the latching bar 252 is moved to inoperative position by the engagement of the nger 254 with a lug 256 on the other end of the bar.

By freeing the roll from the pad 84 just prior to the end of the driving stroke of the crosshead, the roll is allowed to continue freely rotating under the momentum imparted to it by the starting impulse and under the pull of the web as the same is drawn into the press.

Reviewing the operation of the device, the normal operating position of the roll 3| is a little above that shown in dotted lines in Fig. 1. As said roll 3| nears exhaustion, the operator, having previously applied adhesive to the roll 32, moves the reel a little so as to bring said roll 32 as near as possible to the web 38 without touching the same, this position being shown in dotted lines in Fig. 1. In the normal operating position, the crosshead 63, fully advanced, obstructs manipulation of the valve |14 as previously stated. In the temporary position shown in dotted lines, the crosshead has been moved sufficiently to free the valve |14 for manual operation. The operator may then, if he wishes, lock the pad 84 against the roll 32 to prevent the latter from rotating out of position, while he Watches the. roll 3| to determine when to start the paster operation. He may also release the pad 84 so as to reset the position of the adhesive coated area on the roll preparatory to starting the paster operation, this being done by turning the roll by hand. When he decides the roll 3| has been suiciently exhausted, he closes the switch that starts the reel rotating to carry roll 32 into the web.

As the crosshead is thus retracted by the engagement of the operating iinger |91 with the arm 288 of the crosshead assembly, the projection 235 will move the trigger 221 to the left, operating valve |14 so that if the pad 84 has not already been locked against the roll 32, it will be lock'ed automatically. As the reel continues to rotate, the roll 32 will contact the web 38 and bow it outwardly, the web sliding against the smooth rounded surface of the roll, but not rotating the roll since it is held against rotation by the pad 84. When the reel nears the fullline position shown in Fig. 1, the ringer |91 will release the arm 2118 and shortly thereafter will engage the trigger finger 203 and cause the Valve |65 to be operated so as to admit air to the cylinder 64 of the pneumatic drive unit, resulting in the crosshead 63 being forcibly driven to the right. The roll 'engaging unit, being locked against the end of the roll, will move the roll in unison with the movement of the crosshead, the arm 11 swinging first upwardly, then downwardly so as to allow the pad 84 to follow the arc of movement of the region of the roll 'against which it is engaged. As the crosshead nears the end of its driving stroke, the valve |22 will be operated to release the air from the cylinder 8|, thus releasing the pad -84 from engagement with the roll 32 and allowing `the latter to continue rotation under the momentum it has acquired. The region of adhesive coated surface 239, which was positioned at the top of the roll at the commencement of the starting impulse, will move around the roll in a clockwise direction until it contacts the web 38, whereupon it will adhere to the latter under the pressure of the brushes 5|.

The engagement of the web 38 against the roll 32 assists in bringing the roll up to speed, said web being eiective, after the drive unit has released the roll, to adjust the speed of the roll to its own speed before the adhesion takes place. This minimizes the likelihood of failure of adhesion.

Bleeding of the main cylinder 64 as the driving stroke is completed, is accomplished by the moving of the trigger 221 to the right by the

projections

234 and 235, causing the rod 2|1, through the medium of a collar 251 (Fig. 13), which, near the end of the driving stroke, engages the collar 20| on the rod |85, to move said rod to the right, as viewed in Fig. 13, thereby operating the valve |65 to release the air from said cylinder 64. The collars 251 and 20| will be in engagement when the parts are in the relative positions shown in Fig. 15, so that the rod l will be locked against movement by the locking of the rod 2|1, and valve |65 as well as valve |14 will be rendered inoperative.

The foregoing detailed description has been given for cl'earness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible in View of the prior art.

What Iregard as new and desire to secure by Letters Patent is:

1. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for bringing into engagement a new roll and the web of the roll that is feeding the press, a roll start-up device including a member'adapted to engage an end of the new roll in a plane at right angles to its' axis and to move in iixed engagement therewith for a short distance, means for moving said member into engagement with the roll, and means for actuating said roll engaging member to cause vthe same'to impart a quick rotative impulse to the roll preparatory to making a paster between the Awebs of the expiring and new rolls.

2. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for bringingA into engagement a new roll and the web of the roll that is feeding the press,V a roll start-up device including a member adapted to engage an end of the new roll in a plane at right angles to its axis and to move in fixed engagement `therewith for a short distance, means for moving said member into engagement with the roll, and means operated by movement of the roll 'support for actuating said roll engagingmember to cause the same to impart a quick rotative impulse to the roll preparatory to making a paster between the webs of the expiring and new rolls.

3. In a'roll changing apparatus for printing presses, amovable support for a plurality of web rolls, means for bringing into engagement a new lroll and theweb of the roll that is feeding the press, a roll start-up device including a member adapted to engage an end of the new roll, means for moving said member into engagement with the roll,'means vwhereby said roll engaging member may be held in engagement with the roll .to prevent rotation thereof while the same is being moved intoengagement with the running web, and means for actuating said roll engaging memberto cause the same to impart a quick rotative impulse preparatory to making a paster between the webs of the expiring and new rolls.

'4. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for bringing into engagement a new roll and the web of the roll-that is feeding the press, and a pneumatically operated device operable to impart a rotative impulse to the new roll while the latter is in engagement with said running web preparatory to making a paster between `'the webs of the new and old rolls, said device including a driving member engageable with said new roll prior to a driving stroke of said member and automatically acting means for causing said member to move out of driving engagement with said roll upon completion of said stroke.

5. Ina roll changing apparatus for printing presses, a movable support for a plurality of web' rolls, means for bringing into engagement a new roll and the web of the roll that is feeding the press, a pneumatically operated device operable to, imparta rotative impulse to the new roll while the latter is in engagement with said running web preparatory to making a paster between the webs of the new and old rolls in a plane at right angles toits axis, Aand means carried by said movable roll support for operaitng said pneumatic device.

6. In a roll changing apparatus for printing presses, aV movable support for a plurality of web rolls, means for bringing into engagement a new roll and the web of `the roll that is feeding the press, a roll start-up device including a member adapted to engage an end of the new roll in a plane at right angles to its axis and to move in fixed engagement therewith for a short distance, means for moving said member into engagement with the roll, and means for actuating said roll engaging member to cause the same to impart a quick rotative impulse to the roll within less than one revolution thereof preparatory to making a paster between the webs of the expiring and new rolls.

"7. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for bringing into engagement a new roll and the web of the roll that is feeding the press, reciprocable roll engaging means, means carried by the roll support for retracting said engaging meansy during such movement of the new roll into the web, and driving means adapted to return said engaging means from retracted to advanced position and to thereby impart a rotative impulse to the new roll preparatory to making a paster between the webs of the new and old rolls.

8. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for bringing into engagement a new roll and the web of the roll that is feeding the press, reciprocable roll engaging means, means carried by the roll support for retracting said engaging means during such movement of the new roll into the web, and pneumatic driving means controlled by said retracting means when the engaging means reaches retracted position, for returning said engaging means to advanced position and thereby imparting arotative impulse to the roll preparatory to making a paster between the web of the new and old rolls..

9. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means `for moving said support to carry a new roll into engagement with the web of the roll that is feeding the press, roll engaging means, pneumatic driving 'means for imparting a rotative impulse. at right angles to the axis of the new roll through the medium of said engaging means, a valve for controlling the admission of a driving fluid to said pneumatic means,.and means carried by the roll support for operating said Valve to admit fluid to the pneumatic means and thereby actuate said rollengaging means to impart said rotative impulse to the new roll after the latter has reached a predetermined position in engagement with the web.

10. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for moving said support to carry a new. rollA into ,engagement with the web ofthe roll` that is feeding the press, driving means including a reciprocable member having an operative stroke in engagement with said new roll and a; return stroke out of engagement therewith for imparting a rotative impulse to the new roll, and means carried by thek roll support for initiating the action of .said driving means when the roll has reached a predetermined position in engagement with the web. l

l1. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for moving said support to carry a new roll into engagement with the web of the roll that is feeding the press, pneumatic roll engaging means, a Valve to control the flow of fluid to said engaging means, means adapted to automatically operate said valve to admit fluid to said engaging means as a result of such movement of the new roll into engagement with the web, and driving means acting through the medium o-f said engaging means to impart a rotative impulse at right angles to the axis of the new roll when the latter has reached a predetermined position in engagement with the web.

12. In a roll changing apparatus for printing presses,a movable support for a plurality of web rolls, means for moving said support to carry a new roll into engagement with the web of the roll that is feeding the press, pneumatic roll engaging means, a valve to control the admission of fluid to said engaging means, a valve to control the release of fluid from said engaging means, manual means for operating said admission valve, driving means acting through the medium o-f said engaging means to impart a rotative impulse to the new roll when the latter has reached a predetermined position in engagement with the web, and means for automatically operating said release valve when said driving means is nearing the end of its driving stroke.

13. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for moving said support to carry a new roll into engagement with the web of the roll that is feeding the press, pneumatic roll engaging means, a valve to control the release of fluid from said engaging means, driving means acting through the medium of said engaging means, for imparting a rotative impulse to the new roll, and means controlled by the movement of said lengaging means for automatically operating said release valve shortly prior to the end of the driving stroke for releasing said engaging means from its engagement with the roll.

14. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for bringing into engagement a new roll and the web of the roll that is feeding the press, roll engaging means, driving means acting through the medium of said engaging means for imparting a rotative impulse to the new roll, and means controlled by the movement of said engaging means for releasing the same from engagement with the roll shortly prior to the end of the driving stroke.

15. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for bringing into engagement a new roll and the web of the roll that is feeding the press, a roll start-up device including a member adapted to engage an end of the new roll, means for moving said member into engagement with the roll, means for actuating said roll engaging member to cause the same to impart a quick rotative impulse to the roll preparatory to making a paster between the webs of the expiring and new rolls, and means for causing immediate disengagement of said roll engaging member with the roll at the end of the operative stroke of said actuating means.

16. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for bringing into engagement a newgagement of said ro'll engaging member with the roll at the end of the operative stroke of said actuating means, and means for rendering inoperative said means for moving said roll engaging member into engagement withthe roll while the parts are in their normal position of rest.

17. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for bringing into engagement a new roll and the web of the roll that is feeding the press, a roll start-up device including a member adapted to engage an end of the new roll, a pivotally mounted support on which said roll engaging member is carried, means for moving said roll engaging member into contact with the roll and means for actuating the roll engaging unit to cause the same to impart a quick rotative impulse to the roll preparatory to making a paster between the webs of the expiring and new rolls, said support being movable on its pivot to permit said roll engaging member to maintain contact with the point on the roll engaged thereby throughout the arc of movement thereof while such engagement is maintained.

18. In a roll changing apparatus for printing presses, a movable support for a plurality of web rolls, means for bringing into engagement a new roll and the web of the roll that is feeding the press, a roll start-up device including a member adapted to engage an end of the new roll in a plane at right angles to its axis and to move in fixedk engagement therewith for a short distance, means for moving said member into engagement with the roll, means for actuating said roll engaging member to cause the same to impart -a quick rotative impulse to the roll preparatory to making a paster between the webs of the expiring and new rolls, and means for causing immediate disengagement of said roll engaging member with the roll at the end of the operative stroke of said actuating means.

ALLAN J. CLINE.