US1738083A - Web-roll-driving device - Google Patents

Description

3 1929., TORNBERG 1,738,)83

WEB ROLL DRIVING DEVICE Original Filed Aug. 25, 1926 2 Sheets-Sheet l fldiaria? wez y y 1929- 1. TORNBERG WEB ROLL DRIVING DEVICE Original Filed Aug. 25, 1926 2 Sheets-Sheet v Patented Dec. 3, 1929 UNITED STATES PATENT OFFICE ISIDOR TORNBERG, F PLAINFIELD, NEW JERSEY, ASSIGNOR TO WOOD NEWSPAPER MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA WEB-ROLL-DRIVING DEVICE Application filed. August 25 1926, Serial No. 131,524. Renewed April 25, 1929.

This invention relates to a device for rotating a web roll or other heavy roll on its 'own axis. It is particularly adapted for use in an automatic web pasting machine for newspaper printing presses and for the purpose of rotating the spare rol up to web speed just before pasting. The principal object of the invention is to provide a device which will have a material area of contact with the roll which is being driven or speeded up, thus securing an obviously important advantage over the usual arrangement in which a small roller contacts with the surface of the big roll, theoretically along a line only and practically along a very small arc and therefore very small area. With this invention, the length of the are over which the driving means contacts with the web roll is many times greater than has been the result of the ordinary construction and of course 2 the principle can be employed for securing a very much greater are of contact than I have shown in this case.

Other objects and advanta es of the inven- 2 tion will be hereinafter set forth.

ing drawings in which the first four figures show four steps in the pasting of a web by an automatic machine and illustrating the use of this invention in each one of these posi-' tions; 1

Fig. 5 is a View similar to Fig. 1 of the web roll propelling device on enlarged scale; and

Fig. 6 is a plan thereof. 7 Referring particularly to Figs. 5' and 6, it will be seen that the device itself is supported to swing on a shaft 11 which supports a tilting bracket 12, this bracket being hung freely on the shaft This bracket carries another shaft 13 parallel with the driving and supporting shaft 11. The shaft 11 is provided with a sprocket wheel 10 driving the shaft 13 through a chain 9. The shaft 13 has a sprocket wheel 14 for driving a chain 15, or belt if desired, which in turn drives a sprocket wheel on a shaft 16. On this shaft is a pulley 17 over which passes the propelling belt 18. This belt passes to an idler pulley 19 on a shaft 20. A frame 21 is pivoted on the shaft 13 and free to swin thereon and'carries both shafts 16 and 20. he belt also passes over a [on its. reel to a place just back of Reference is to be had to the accompanypulley 22 which is mounted free to turn on the shaft 13 and constitutes a slack tightener. The belt is tightened by turning the eccentric bearing 24 of the shaft 20.

The bracket 12 would swing down vertically from the shaft 11, but it is provided with a pin 25 which passes through a slot 26 in a link 27. This link depends from the end of an arm 28 fixed on a shaft 29 which can be turned to the position shown in Fig. 5 to hold the whole device up. Where there are a plurality of these caterpillar drives, the shaft 29 has a corresponding number of arms 28 each controlling the height of one drive.

The use of this propeller is illustrated in the first four figures. In Fig. 1 the device is held up as in Fig. 5 by the arm 28. In this position a fresh roll R has been swung about the web W coming from the running roll. When the running webroll decreases in size so that it is about to expire as shown in Fig. 2, the roll It is brought forward a little, or not as desired in accordance with the machine on which it is to be used. In any event, it isabout to be pasted to the end of the expiring web. Now the shaft 29 is turned so as to bring the arm 28 down to its lowest position and the bracket 12 descends and the frame 21 is brought down with it so that the belt 18 rests on the roll R. The pulley or sprocket wheel 10 on the shaft 11 of course rotates continually and thereby rotates the shaft 13 at alltimes. Thus the belt 18 is always running in the proper direction to propel the web roll to move with the web at the pomt of contact with the web. Now it will be seen that in the position shown in Fig. 2, the Web roll R can be rotated up to full Web speed and kept exactly at that speed unt1l the splice is made. At this time it Wlll be seen that the bracket 12, although capable of swinging down to its lowermost position, is

to swing on the shaft 13 as a center to any position necessary to keep the same length ofarc of the belt in contact with the roll. In

other words, the movement of the roll R to,

and from pastin position does not result in any loss of traction by this device. It turns automatically by its contact with the roll to keep full'control of it. I

In the position shown in Fig. 4, the roll R has passed on and the caterpillar drive comes into contact with the next roll and gives it its full operating effect immediately if that is desired. The belt is necessarily not perfectly taut. Therefore the resting of the weight of the device on the roll R through the belt concaves the active-strand of the belt and provides a large surface contact,

It will be seen therefore that not only is there an advantage in the contact of the driving device with the roll throughout a wide .surface, but the device is so arranged that scribed, but'what I do. claim is 1. In a device for rotating a roll on its own axis, the combination with a movable frame pivotally mounted at its center, of a pair of shafts thereon, one on each side of said center pivot, pulleys mounted on said shafts, means for positively rotating one of said shafts, and a driving belt passing over the pulleys, the driving belt being adapted to engage the roll to be driven half way between the pulleys, whereby the pressure of the device against the roll to be driven will cause the driving belt between the rollers to assume the shape of the surface of the driven roll.

, 2. In a device forrotating aroll on its own axis, the combination with a frame freely pivoted at'th'e center, of a pair of shafts thereon.

at opposite sides of the pivot, pulleys mounted on said" shafts, means for rotating said shafts, and a propelling belt passing over the pulleys, adapted to engage the r0 1 and assame the shape of the surface thereof to drive the roll by contact with a large surface thereof. 4

- 3; .In a device for rotatinga roll on its own axis, the combination with a bracket adapted to move toward and from the roll, of aframe pivotally. mounted on said bracket and havin two spaced apart parallel shafts journa ed in the frame, a pair. of pulleys on said spaced apart shafts, and a propelling belt on said pulleys in position t'o engage the'roll to bedriven, at a" point between them, whereby the frame is free to swing on its own axis and to accommodate itself to the relative position of the bracket and the roll to be driven.

4. In a propelling device for a roll, the combination with a driving shaft, a bracket pivoted on said shaft to swing freely, and means connected with said bracket for raising or lowering it so the device will be in or out of contact with the roll to be driven and will rest by its own weight against the roll, of a shaft on said bracket, means for driving the second shaft constantly from the first shaft, a frame pivoted on the second shaft to swing freely thereon, two pulleys on said frame, means for driving one of them positively from the second shaft, and apropelling belt on the two pulleys in position to engage the web roll at a point between the two pulleys, whereby the web roll will be driven thereby.

5. In aprope'lling device for a web roll, the combination with a driving shaft in fixed position located above the web roll to be driven, a bracket pivoted on said shaft to swing freely, a shaft, and an arm and link construction connected with said bracket and shaft for raising the bracket so the device will be out of contact with the roll or lowering it so that the device will rest by its own weight against the roll, of a shaft on said bracket, means for driving the last-named shaft constantly from the first shaft, a frame pivoted 0n the third shaft to swing freely thereon, two pulleys on said' frame, means for driving one of them positively from the third shaft, a propelling belt on the two pulleys in position to engage the web roll at a point between the two pulleys, whereby the web roll will be driven thereby, and an idler lpullley on the third shaft also engaging the 6. In a drive for rotating a roll on its own axis, the.combination of a pair of pulleys spaced apart, a propelling belt mounted on said pulleys and adapted to contact with the roll throughout a wide area between. the pulleys, means for movably supporting the pulleys at a point between them, and means {pirotating one of the pulleys to propel the .7. In a drive for rota-tin a roll on its own axis, the combination wit a support, of a pair of pulleys, a driving belt mounted on said pulleys and adapted to contact with the roll'to be driven, means for pivotally supporting them at a point between the ulleys, and means for. raising and lowering the pulleys.

In testimony whereof I have hereunto affix'ed my signature. v ISIDOR- 'ORNBERG.

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