US1414809A - Rewind device for multiple-process printing presses - Google Patents

Description

R. T. HOSKING. REWIND DEVICE FOR MULTIPLE PROCESS PRINTING PRESSES.

' APPLICATION FILED mums. 1921.

1,414,309, Patented Ma 2,1922.

lNV ENTOR ATTORNEY unites stares raiser assist.

RICHARD T. HOSKING, 0F SAGINAW', MICHIGAN,

Application filed April 28, 1921.

To all whom it may concern: 7

Be it known that I, RICHARD T. HosKINe, a citizen of the United States, residing at Saginaw, in the county of Saginaw and State of Michigan, have invented certain new and useful Improvements in Rewind Devices for Multiple-Process Printing Presses; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same. y

This invention relates to rewinding devices for printing presses and pertains more particularly to an improved means for re-' winding or rerolling the product of multipleprocess printing presses, such as are used for printing and perforating tickets, stamps, labels and the like. 7

My improvement relates more specifically to a rewinding device adapted to be applied to a printing press of the character described, in which the strip of paper, or web,-

is fed into thepress by an automatic interf mittent feeding mechanism that pulls the paper or web through the press and feeds it past the printing plates, and through the perforating attachment, and then through the slitters that cut the wide web into a plurality of strips.

In presses of this kind, the work travels through at high speed, making from fourthousand to upwards of seven-thousand impressions per hour, and the feed is usually so arranged that each intermittent movement of the web is through a distance of about the length of two stamps. Consequently the work comes to rest and then moves forward a distance of two stamps at the rate of twothousand to nearly four-thousand-tiines per' hour.

My rewinding device is adapted to take the product in the form of plurality of strips of printed and perforated stamps, and to wind each strip on a spool.

It is the object of my present improvement to provide a rewind device that will wind each strip with an even tension, the winding spool so mounted that its" rotation will be stopped when the strip of stamps stops and will immediately rewind at predetermined tension as soon as the perforated strip is again fed forward by the intermittent feed of the machine.

Specification of Letters Patent.

Patented May 2,1922.

Serial No. 465,169.

Since this starting and stopping of the winding spool must occur very frequently, that is to say, up toabout four-thousand times per hour, and since the rewound roll of tickets on the spools must be true and even and of quite large diameter, it follows that the inertia of the parts of the rewinding device and of the partly wound roll of perforated stamps must be carefully controlled,

otherwise. the strips of perforated stamps Wlll be torn in two, thereby putting the en tire machine out of service until the break is repaired.

Rewind devices of various kinds have heretofore been'produced, and it is to avoid the defects of such previous constructions, which defects result principally in the breaking of the delicate strip of stamps, that I have devised my present improvement.-

In the drawings, Fig. 1 isa side elevation of the delivery end of a flat bed and platen press with my improved rewind device attached;

of a winding spool. i 1

.Fig. 3 isan enlarged sectional view on the line 3-3 ofFig. 1. i

As is clearly shown-in the drawings, 1 indicates therear end of the frame of a multiple-process press of the kind to which my im provement is applied. Upon the frame is mounted the usual perforating devices 2, the

- attachment 3 for slitting the web into strips and the feed device &-adapted to feed the web through the machine by distances equal to the length of, say, one or two stamps at a time.

5 is a rotating shaft that actuates the perforating devices 2, and 6 is suitable gearing operatively connected to the slitting attachment 3 and the feed device l, to impart intermittent movement to those devices.

7 is a rotating shaft which extends across the machine and actuates the gearing 6 by means of :a suitable ratchet mechanism, not shown, on the opposite side of the machine.

The above mentioned mechanisms are regularly incorporated in machines of the character to which my invention is adapted to be Fig. 2 is a side view, partly broken away,

belt 8 is tensioned by means of an adjustable spring 9 and an idler pulley 10, around which the belt 8 travels.

Carried by suitable brackets at the rear of the frame 1 is a rewind shaft 11, which is mounted in bear ngs 12,-12. This shaft is prevented from endwise movement by any suitable device, as a pin 13, projecting from the bracket 12 into a circular groove let formed in the shaft 11. At one end of the shaft is secured a pulley 15 driven by the belt 8.

The rewind shaft 11 is formed with a slit or keyway 16 and u on the shaft are slipped the rewind spools 17, each having a feather, or equivalent projection 18, slidingly received in the groove 16 to prevent the spool 17 from turning on the shaft 11.

19 is a s rip of the slitted perforated web which issues from the machine in the form of a plurality of parallel strips of stamps. 1n the device shown in Fig. 8 there are five such strips to be wound simultaneously.

The perforated trips of stamps are delicate and easily broken, and the breaking of any one strip necessitates the stopping of the machine until the break is repaired. Consequently, it has been customary in machines of this kind to keep an operator at the delivery end of the machine to watch for breaks and to repair them as quickly as possible.

.liy present device, however; does away with the necessity of employing this additional operator. By my improved construc tion and mode of operation, the breakage of stamps is practically eliminated.

t will be remembered that the stamps issue in intermittent feeds from the machine at the rate of two-thousand to four-thousand operations per hour and consequently the spools 1'7 and the rolls of stamps 19 must start from rest, wind the length of one or two stamps, depending upon the feed of the machine, and again stop, and that this op oration must be repeated about once per second without breaking the fragile perforated strips. Its operation is as follows:

The belt 8, being set to the proper tension, is continuously operated at fixed speed by shaft 7 and consequently shaft 11 of the rewind device is normally run at uniform speed, but y reason of the regulated and predetermined tension in the belt 8, the pulley will be driven by the belt 8 with. only suflicient power to properly wind the slitted web 1.9, but when the web is held stationary in the machine, as during the perforating operation, the spools 17, shaft 11 and pulley 15 will be halted and the belt 8 will slip on the pulley 15; As soon as the web 19 is released by the machine and allowed to feed out, the pulley 15 and spool 17 will again revolve until the. amount of material fed from the machine has been wound.

Since this operation has to be repeated so rapidly, it is necessary that the rewind device be so arranged as to avoid rearing the strips or web by the inertia of rotating parts in the rewind mechanism.

Between the spools 1.? are disks of sheet metal 20 for the purpose of guiding the strips 19 to wind them evenly and smoothly and produce a completed roll of large diameter.

The disks 20 are loose on the shaft ll and consequently the shaft with its spools 17 may turn without turning the metal disks 20, but if these disks do turn, they will not exert any appreciable torque on the shaft 11, when that shaft is suddenly stopped by the stopping of the web 19 coming from the machine, but the disks will, on the other hand, continue their rotation loosely on shaft 11. until they come to rest. v

Pr viously it has been customary in rewind devices of this character to fasten thedisks 2O rigidly on the shaft 11, but it has been found in practice that when the disks are fixed to the shaft and the rewind device is alternately started and stopped with great rapidity, the inertia of the disks, combined with the inertia of the rolls 19 and the spools 17 frequently break the stamps and in practice have necessitated the use of an extra operator at the delivery end'of the machine.

In my improvement,the disks 2O perform their function of guiding the winding of the strips 19 without introducing any strains tending to tear the stamps. lhe controlled and predetermined frictional driving power of belt 8 prevents enough pull being exerted on the stamps lo shaft 11 and pulley 15 to break the perforated strips.

Furthermore, the stamps are fed in a direct line from the issue end of the printing machine onto the periphery of the winding spools 17, leaving no loop or slack in the web and consequently greater uniformity of winding is assured.

Having thus described my invention, what 1 claim and desire to secure by Letters Patent is:

1. In a re-wind device of the class described, the combination of a shaft, a driving device operatively connected to said shaft and adapted to normally rotate, but capable of imparting thereto only limited and predetermined amount of turning effort, winding spools removably received on said shaft and rotatable therewith, and disks loosely received on said shaft at the sides of said spools.

2. In a re-wind device of the class described, the combination of a shaft having removable spools thereon and disks loosely receivec thereon the sides of said spools, a pulley fixed to said shaft, a a continuously riven belt so engaging said pulley belt tensioned to produce a limited and pre- 10 determined amount of driving contact with said pulley, and adapted to slip on said pulley when the resistance of said pulley to the turning effect of said belt is increased by the stoppage of said strips during their inter- 15 mittent feed.

In testimony whereof, I afiix my signature.

RICHARD T. HOSKING.

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