US1304630A - Web-feeding mechanism for printing-machines - Google Patents

Description

l. TORNBERG. WEB FEEDING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED MAY 26. 19I6 I. TORNBERG.

WEB FEEDING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED MAY 26; IQIS.

.IIIIIII INVENTOR. 1104,46

Patented May 27, I919.

4 SHEETS-SHEET 2 I III """"""""""'III ATTYS I. TORNBERG. WEB FEEDING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED MAY 26, I916.

m U-L UNITED STATES PATENT OFFICE.

ISIDOR TORNBERG, OF NEW YORK, N. Y., ASSIGNOR TO B. HOE AND (30., OF NEW YORK,

N. Y., A CORPORATION OF NEW YORK.

WEB-FEEDING MECHANISM FOR PRINTING-MACHINES.

Specification of Letters Patent.

Patented May 27, 1919.

New York, have invented certain new and useful Improvements in VVeb-Feeding Mechanism for Printing-Machines, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to certain improvements in web printing machines.

In web printing machines, the paper or other material to be printed upon is threadcd from a roll located outside the machine up to and through the various printing elements. It frequently happens that it is desirable to lead the web to a part of the machine at some distance from the supply roll and through part of the machine, where, because of its design or construction, certain obstructions are presented around which it is diflicult to lead the web, causing trouble to the pressman and an unnecessary consumption of time in the web threading operation. It is desirable, therefore, that some means be provided for facilitating the threadin of the web minder such circumstances. Various devices have been suggested for this purpose; for instance, it has been proposed to employ tapes running over rollers driven from some moving part of the machine, the web being forwarded by these tapes. Where these continuously running tapes have been employed, however, when the machine comes up to speed, which in web machines, is usually very high, the tapes get tangled up or twisted and frequently jump the rolls or pulleys, thereby causing trouble. It has further been suggested to provide a machine employing such tapes and rolls, with a throwout mechanism which will be operated by centrifugal force upon the rolls reaching a predetermined speed to stop the moigement of the tapes. This construction has its disadvantages, in that the mechanism for effecting it is complicated and expensive, and, furthermore, such mechanism may not function, with the result that the tapes are apt to become twisted or jump the rolls or pulleys, the pressman not knowing whether the tapes have been stopped or not.

It is an object of the present invention to provide a simple construction. Wh h ll be.

manually operated by the pressman to positively cause the tapes to be thrown out of action after the paper has been threaded through the machine and the press is in operation, the pressman knowing that when he has manipulated the device the tapes are thus thrown out of action.

lVith this and other objects not specifically referred to in view, the invention conin certain novel parts and constructions which can best be understood from a detailed description of the same, which will now be given in connection with the accompanying drawings.

In the drawings Figure 1 is a side elevation of so much of a web press as is neceary for an understanding of the invention, the tapes being shown in operative position;

Fig. 2 is a similar view showing the tapes thrown out of action;

Fig. 3 is aplan view of the construction shown in Figs. 1 and 2;

Fig. 4 is a side elevation of a modification which may be employed with certain types of machines;

Fig. 5 is a partial plan view partially in section of the construction shown in Fig. 4, and

Fig. 6 is a detail showing the mechanism Y for adjusting the feeding-in rollers of a press to adjust the tension of the web.

The machine chosen to illustrate the invention is a rotary web printing machine, although the invention may be used with other types of printing machines, and with other types of web-feeding machines generally.

Referring now to the drawings which illustrate this machine, and referring first to Figs. 1 to 3, the web W is forwarded from the web roll R over the usual guide rolll, tension rolls 2, 3, through the feeding-in rolls 4, 5 and 6, to the printing couples of the machine, one of which has been diagrammatically indicated by the cylinders 7 and 8, as is usual.

The means provided by the invention by which the paper may be threaded from the web through the feeding-in rolls on tapes, which may be positively thrown out by the pressman, may be somewhat varied. In the particular construction illustrated in Figs. 1 to 3, Where feeding-in rolls are employed,

there are provided tapes which may be varied in number as required. In the particular construction illustrated, there are two of these tapes 9. These tapes are carried over tape rolls 11, 12, one pair of rolls being provided for each tape, the rolls 11 being located at the end of the tape running next the paper supply and the rolls 12 being located at the opposite end at or near the feeding-in rolls. One set of these rolls 11, 12 will, in the best constructions, be made adjustable, so that slack in the tape may be taken up. In the particular construction illustrated, the rolls 12 are thus made adjustable, these rolls being carried on studs 13-mounted in arms 14, which arms in turn are slidable in blocks 15 fast on and supported by a shaft 16 extending across the machine. The other tape rolls 11 are mounted on studs 17 carried in arms 18 fast on a rock-shaft 19 extending across the machine, this rock-shaft being suitably operated through connections and for purposes hereinafter referred to.

In accordance with the invention connections are provided for bringing these tapes into operative position to feed the web to andthrough the feeding-in rolls, and, after the web has been so fed and the machine is brought up to Speed, for putting them out of operation. The particular construction of these connections may be considerably varied. In the particular construction illustrated, however, motion is imparted to the tapes and the tapes are put out of action by means of what may be termed actuator rolls chine, the ends of the shaft sliding in the slots in the ends of these blocks. For purposes hereinafter referred to, the lower portions ofthese slots are formed at an angle to the upper portion, or that portion in which the roll travels, as indicated in Figs. 1 and 2.

Movement may be given the actuator rolls, to cause them to bring the tapes into operative position with respect to the leading-in rolls 4, 6, from which motion is imparted to them, or to cause them to be removed from operative position, in any suitable manner. The means employed for giving such movement, however, will be such as to be operated by the pressman, so that after operating such means he will know'positively that the tapes are either in or out of operative position. In the particular construction illustrated, this movement is effected by means of treadles 24, two such treadles being preferably provided, one on each side of the tape paths. These treadles are a r d,

on arms 25 fast on the shaft 16, before referred to. Also fast on the shaft 16, and located closely adjacent the treadles, are arms 26. the ends of which are located beneath the shaft 21. By operating the treadle the shaft 16 is rocked, and the arms 26, contacting with the shaft 21, operate to lift the shaft and bring the actuator rolls into contact with the feeding-in rolls and place the tapes under tension. The parts may be held in this position by providing the treadle with a pivoted latch 27 taking under a stop 28 suitably secured to the frame of the machine.

While the construction so far described causes the tapes to be brought into operative position and placed under sufficient tension to perform their web-feeding functions, in

the best constructions the tape rolls 11, be-

fore referred to, are also operated to place the other end of the tapes under tension. While this may be variously effected, in the best constructions these rolls are operated to bring the tapes under tension and relieve them from tension by the treadles before referred to. While this may be effected in various ways, in the particular construction illustrated there is provided a rod 29, having at one end an arm 30 fast on the shaft 16, before referred to. Fast on the shaft 19, from which the rolls 11 are supported, is an arm 31 to which the other end of the rod 29 is secured. When the treadle is operated through these connections, the rolls 11, 12 are raised and lowered, and place the tapes under tension or relieve them from such tension, as clearly shown in Figs. 1 and 2.

In the best constructions, where feedingin rolls are employed, there are provided curved guides for guiding the paper through and over the feeding-in rolls 4 and 6, which are driven rolls, and the third roll of the. set, 5, which is a composition roll frictionally driven from the others. In the particular construction illustrated, two of these curved guides are employed, one of which acts to guide the paper around the feeding-in roll 4, and the other of which acts to guide the paper around the composition roll 5 and down to and around the other feeding-in roll 6. The guide for guiding the paper as it is fed from the tapes to the first feedingin roll 4 is, in the best constructions, formed to move with the actuator rolls 20, before referred to, and, in the best constructions, there will be provided one such guideat each side of the machine. While the for'iii of these guides may be somewhat varied, as illustrated they are in the form of curved fingers 32 fast on the shaft 21, these fingers moving with the shaft from the position shown in Fig. 1 to the position shown in Fig. 2, this movement being effected by means of an arm 33 mounted on the shaft 21 and having a pin 34 taking in the angular portion of the slot in the slotted block 22,

before referred to. The pin, riding in this slot, causes the shaft 21 to rock slightly and throw the guiding fingers out of the way when they are brought to the lower position shown in Fig. 2.

The guides for guiding the paper around the composition roll 5 may be of any suit able form, and as illustrated they are in the form of curved plates 35, and prefera'bly are pivotally mounted, as at 36, for purposes hereinafter referred to, in the frame. In machines embodying feeding-in rolls employing a composition roll frictionally driven from the driven rolls, it is often desirable to move this roll out of contact with the other rolls for the purpose of adjusting or straightening out the web. This can be effected in any suitable manner, as by mounting the composition roll 5 in slotted blocks, the roll being manipulated in these blocks by meansof a hand lever 39, pivoted at 40 to the frame of the machine and taking against the end of the roll shaft 41. To enable the web to be adjusted under the guides, if necessary these guides are elevated when the composition roll is elevated, as shown in Fig. 6, this being effected through rods 42 connected at one end to arms 37 fast to the bar 36 before referred to, and at the other end to the handle 39.

The feeding-in rolls are positively driven in any suitable manner, as by gearing 43 mounted on the roll shafts, driven from intermediate gear 44, which in turn is driven through miters 45 from a shaft 46 operated from any moving part of the machine.

In some types of machines, feeding-in rolls to the cylinders are not employed. The modification shown in Figs. 4 and 5 is adapted for use with such types of machines, and will be briefly described. 'In this construction the web is led by the tapes 9 under the adjustable tension rolls 2. 3, which are the same as in the construction shown in Figs. 1 to 3, and from the latter to a third tension roll 47, thence around guide roll 48 to the cylinders 7 8 of the machine. In this construction, where there are no feeding-in rolls over which the tape is frictionally driven, there is provided, for causing motion to be imparted to the tapes, an actuator roll 49. In this construction the actuator roll does not contact with the tapes, but is a driven roll, and there are provided connections for imparting motion from it to the tape driving rolls 12, located at one end of the tape path. While the actuator roll may be formed and driven in any suitable manner, in the particular construction illustrated it is in the form of a grooved pulley mounted on a stud 50 finding bearings in a hub 51 supported on one end of an arm 52. The roll 49 cotiperates with a second grooved pulley 53 mounted of the machine and driven through a suitable intermediate gear 55 from one of the cylinders ofthe machine. Motion is trans mitted from the actuator roll 49 to the roll 12 by means of a chain 56 on the roll shaft 57. The roll shaft 57 carries a hub 58 to which is fast the other end of the arm 52, before referred to. Fast on this hub is a second arm 59, to which is secured the latched treadle 24. The tape rolls 11 on the other end of the tape path are mounted and operated through a rod and arm construction similar to that hereinbefore described through the treadle 24. \Vhen the treadle is unlatched and permitted to rise through the connections before described, the actuator 49 is removed from operative contact with the pulley 53, and motion to the tapes is stopped. At the same time the tape rolls 11 are operated, and the tension on the tape released.

It will be seen from the construction described that a very simple and positively working construction has been provided for stopping the motion of the tapes and for slackening the tapes, it being obvious that when the tapes a-rethrown out as described they are at no time in contact with any of the moving parts of the machine, and, furthermore, the pressman knows that after he has operated the treadles, the tapes are in non-feeding position and that the press may be speeded up without incurring the danger of the tapes becoming twisted or jumping the rolls.

While the invention has been described in its preferred forms, it will be understood that various changes and variations may be made in the specific construction for imparting motion to the tapes and for manually throwing the tapes out of operative position, and that such changes and variations are within the scope of the invention as do fined by the claims.

It is further understood that while the invention has been shown as feeding the web to the printing cylinders, the invention may be used in feeding the web to other parts of the machine and is not limited to the use shown.

What is claimed is:

1. In a web printing machine, the combination with a source of web supply, of traveling web feeding devices, devices for starting and stopping the traveling movement of the feeding devices, devices for tightening or slackening the feeding devices, and manually operated means for simultaneously effecting the starting'and stopping and the tightening or slackening of the feeding devices.

2. In a web printing machine, the combination with a source of web supply, of traveling web feeding devices, devices for tightening or slackening the web feeding devices, an actuator, and manually operated means for moving the actuator to cause a starting or stopping of the feeding devices and connections for simultaneously effecting a tightening or slackening of the feeding devices.

3. In a web printing machine, the combination with traveling web feeding tapes, an actuator, manually operated means for moving the actuator to start or stop the tapes, and means movable simultaneously with the actuator for tightening or slackening the feeding tapes.

4. In a web printing machine, the combination with feeding tapes, of supports therefor at each end of the tape paths, one of said supports being pivotally mounted, an actuator independent of the supports which controls the movement of the tapes, manually operated means for operating the actuator whereby'the tapes are started or stopped, and means for simultaneously moving the pivoted tape support about its pivot to tighten or slacken the tapes.

5. In a web printing machine, the combination with a source of web supply, of feeding-in rolls, feeding tapes, an actuator roll, and means for moving the actuator roll to bring the tapes into and out of engagement with the feeding-in rolls for driving and stopping the tapes.

6. In a web printing machine, the combination with a source of web supply, of feeding-in rolls, feeding tapes, supports for the tapes, an actuator, means for moving the actuator to brin the tapes into and out of engagement wit the feeding-in rolls for driving and stopping the tapes, and means for moving one of the tape supports to tighten or slacken the tapes.

7 In a web printing machine, the combination with a source of web supply, of feeding-in rolls, feeding tapes, supports for the tapes, an actuator, means for moving the actuator to bring the tapes into and out of engagement with the feeding-in rolls for driving and stopping the tapes, and means acting simultaneously with the movement of neoaeso the actuator for moving one of the tape supports to tighten or slacken the tapes.

8. In a web printing machine, the combination with a source of web supply, of feeding-in rolls, feeding tapes, tape supports at each end of the tape paths, an actuator roll located beneath the feeding-in rolls, a treadle and connections therefrom for moving the roll to cause it to bring the tapes into and out of engagement with the feeding-in rolls for driving and stopping the tapes, and connections operated from the treadle for moving one of the tape supports to tighten or slacken the tapes.

9. In a web printing machine, the combination with a source of web supply, of feeding-in rolls, feeding tapes, tape supports at each end of the tape paths, an actuator roll,

, a shaft therefor, a treadle and connections from the treadle for moving the roll to bring the tapes into and out of contact with the feeding-in rolls for driving and stopping the tapes, and a web guide carried by the roll shaft for guiding the web to the feedingin rolls as it leaves the tapes.

10. In a web feeding mechanism, the combination with a source of web supply, of web feeding tapes, a movable actuator roll, and

manually operated means for moving the actuator roll into and out of contact with the tapes for effecting the driving or stopping and at the same time tightening or slackening the tapes.

11. In a web printing machine, the combination with a source of web supply, of feeding tapes, supports therefor at each end of the tape paths, one'of said supports being pivotally mounted, an actuator roll, manually operated means for operating the actuator roll for driving and stopping the tapes, and means for simultaneously moving the pivoted tape support to assist in the driving or stopping movement of the tapes by tightening or slackening the same.

In testimony whereof, I have hereunto set my hand.

ISIDOR TURNBERG.

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