US989871A - Web-feeding mechanism for printing-presses. - Google Patents

Description

W. A. PRINGLE. WEB FEEDING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED AUG. 4. 1908.

Patented Apr. 18, 1911.

2 SHEETS-SHEET 1.

INVENTOR W 414% BY {a WW ATTORNEYS.

WIT 8E8:

W. A. PRINGLE. WEB FEEDING MECHANISM FOR PRINTING PRESSES. APPLIOATIdN FILED AUG. 4, 1908. I 939,371 1 Patented Apr. 18, 1911.

' 2 SHEETS-SHEET 2.

\ 'M 'ZVW 75w ORNEYS.

' WILLIAM A. PRINGLE, or

UNITED STATES PATENT OFFICE.

NIAGARA FALLS NEW YORK, ASSIGNOR TO THE CARTER- CRUME COMPANY, LIMITED, F NIAGARA FALLS, NEW YORK, A CORPORATION OF CANADA.

WEB-FEEDING MECHANISM FOR PRINTING-PRESSES 989.871. Sbecifieation of Letters Patent Patented Apr. 18, 1911. Application filed August 4. 1908. Serial No. 446,838. To all whom it may concern. from the supply roll a trifle faster than the Be it known that a citizen of the United States. residing at i Niagara Falls. in the county of Niagara and State of Xew York, have invented certain new and useful Improvements in IVeb-Feeding )Iechanism for Printing-Presses," of which the following is a full, clear, and exact description. such a will enable others i skilled in the art to which it appertains to make and use the same.

lns nvention relates to web-feeding mechanism. and more particularly to mech- I anism of this character adapted for use in printing presses. One of the objects of the invention is to I provide web-feeding mechanism such that the guiding of the webs through "the press may be facilitated.

he invention accordingly consists in thefeatures of construction. combinations of elements and arrangement of parts which, will be exemplified in the construct-ion hereinafter set forth, and the scope of the application of which will be indicated in the following claims.

n the accompanying drawings wherein I is illustrated one of the various possible embodiments of my inventio horizontal sectional view portion of the printing press, showing the mechanism constituting this embodimentof my invention ig. 2 is a rear elevation of the mechanism shown in Fig. 1. Fig. 3 is a side elevation thereof. Fig. 4 is a a. portion of the mechathe partsbeing shown in adifferent Figure 1 is a iflerent position. the view being also drawn imilar reference characters refer to similar parts throughout the several views of the rawings.

In order to render the objects vention clearer of understanding, it ma er properly to guide his result susually attained that draw the web I. VILLIAZI A. PRINGLE, l

ladapted to be d I ported upon a link 'nected as In prior conen necessary to regulate f certain of the feed ing usually performed by thefeed operator and necessitatingconstant watchfulness. By my invention the web is 'fed into the press in such manner that a predetermined amount of slack is always automatically maintained between the feed rolls.

eferrlng now to the drawings 1 denotes adapted to rest upon the base of the p Rotatably mounted in the frame is a feed roll 4.- which is provided with a. sprocket 5 he press by are pivotally mounted frame. *1 V 1 I A guide roll is supported in the up per portion of the frame. and the web 11 after passing between over roll 10 to f tween roll 10 and feed rolls which are shown diagrammatically at 13 and 14, said latter'rollers being adapted to feed the web into the press. lack portion 12 1s formed in therefore, peripheral and 6. and 13 and14 comprises aweight which rests in the slack portion 12, said weight in the present instance being comprlsed by aroller 15. This roller is rotatably sup- 16 which in turn is e01 flexible member or a lever 18 pivotally Lever 18 interme-l by means of a cord 17 with the end of supported in the frame.

upon a rod This sleeve has at each end a short arm 2-3 is amount of slack by stopping the opera- 1 rolls, this workrolls 4 and 6 passes- 6 1s a rider this embodiment of slack portion 1 point the weighted roller is lifted, there- 2 the slack portion cally controlled independently of the This mechanism the operator amount of '40 regulate the widely different mi ht be said to 65 ranged which is located immediately beneath one of thearms 7 which support the idler or rider roll 6.

Having thus described the construction of my invention, the operation thereof may now be understood. v When the slack portion 12 gets below a certain point the weight of the roller 15 is thrown on the lever 18, thereby, through sleeve 21 and arms 23, lifting the u er feed roll 6 @from feed roll 4, thus releasing the pressure on the web and retarding the ,feed thereof. When the loop of the rises above a predetermined lever 18 to rise and the feed back upon roller 4: to increase the supply of slack. In practice the parts are so adjusted that the loop formed by 12 is always automatically maintained atthe same length.

In the drawings I have shown the mechanism as'arranged for feeding two webs side liv side, the slack of .each being automatiother. can be utilized to feed a wide single web, a long weighted roller being attached to each end of the levers 18. It will accordingly be seen that I have proby allowing roll 6 to fall 30 vidcd mechanism well adapted to attain among others all the objects thereof in a simple yet eflicient manner. By means 0 this construction a great amount of labor is saved, inasmuch as it is not necessary for to periodically stop and start to provide the proper Another advantage attained by means of this construction isthat since it isunnecessary to stop the press to slack in the'web, amount of printing is effected in a single ress in the given time.

As many changes could be made in the above construction and embodiments of this inven- ,tion could be made without departing from the scopethereof, it isintended that all matter contained in the above description or shown in. the accompanying drawings shall the press in order slack.

be interpreted as illustrative and not in a limiting sense. It is' also to be understood that thelanguage used in the following claims is ntended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention which,

fall therebetween.

a'vingdescribed my invent1on,'what I claini as new and desire to secure by Letters Patent is: i H

-- 1. In an apparatus of the class described,

/. the combination of two pairs of feed rolls adapted to feed a web, one pair being arbehind the other and normally -means for varying a. greater many apparently as a matter of language,

driven at a greater peripheral velocity, whereby slack is produced in the web, and the pressure exerted upon said pairs of rolls, wherethe web by one of by a uniform amount of'slack is maintained between said pairs of rolls.

2. In an apparatus of the class described, the combination of two pairs of adapted to feed a web, one pair of said rolls being arranged behind the other and adapted to be driven at a greater peripheral velocity, whereby. slack is produced betweensaid pairs of rolls, and means for automatically varying the pressure exerted upon the 'web by the rearmost .pair of said rolls, whereby a uniform amount of slack is maintained between said pairs of rolls.

3. In an apparatus of the class described, the combination of two pairs of feed rolls adapted to feed a web, one pair of rolls being disposed behind the other and adapted to be driven at a greater peripheral velocity, whereby slack is produced in tween said pairs of rolls, and means controlled by the slack port-ion of the web for varying the pressure exerted upon said web by one of said pairs of rolls, whereby a uniform amount of slack is maintained.

4. In an apparatus of the class described, the combination with web-feeding means comprising two pairs of rolls, one pair thereof being disposed behind the other and driven at a higher peripheral velocity whereby slack is produced in the web between said pairs of rolls, and means controlled by theslack portion of the web for moving the rolls of the rearmost pair thereof sure upon the web may be varied and a uniform amount of slack maintained between said pairs of rolls. 1

i 5. In an apparatus of the class described, the combination with two pairs of rolls adapted to feed a web, one pair being arranged behind the gther and adapted to be driven at a higher peripheral velocity,

the web between said pairs of rolls, and means controlled by the slack portion of the Web for moving one pair relatively the pressure upon th cess of slack will be taken up pair of rolls.

6. In an apparatus of the class described, in combination, two sets of feed rolls adaptby the other of the rolls of the rearmost the web berelatively to each other, whereby the prese web, whereby any exed tofeed a web,one set being disposed bea greater pehind the other and running at is produced ripheral velocity, whereby slack in thewebs between said sets of rolls, the rolls of the rearmost toward andfrom the the pressure on the movable roll from engagement with the feed rolls .same to swing said first mentioned constant whereby a unif when more than apredetermined amount of slack exists between said sets to allow some of the slack to be taken up by the foremost set of rolls.

' In apparatus of combination with the carried by the frame, ried from an said other thereof frame, of'a feed roll a second 'feed roll car by the frame and said first mentioned feed roll, a second of feed rolls arranged in ad first named"feed rolls, said first named e run at a arranged in advance of pair and adapted to be driven at a less peripheral velocity than the first mentioned pair, whereby slack is maintained in the web, a pivotally mounted lever engaging said arms, and a weight resting in the slack portion of the web "pairs of rolls, said weight being connected with said lever and adapted to cause the said arms to carry the roll the other of said rolls'to vary web passing therebetween, whereby a un1- form amount of slack is maintained between said 'olls.

9. apparatus of the class described, the combination with web-feeding means comprising two pairs of continuously rotating other and being driven at a higher pe; 'ripheral velocity, whereby slack is produced in the web between said pairs ofrolls, and means acting adapted automatically to vary operation the the feeding speed of said rol ls rema'inin orm amount of slack is at all times maintained between said pairs of rolls.

10;- In apparatus'of the the combination withthe feeding ,means comprising a driven feed roll carried by the idler. feed roll resting upon said class described,

positively frame, first men- 'tioned feed roll, pivotally' mounted arms roll, a lever pivler feed the frame engaging whereby said idler feed roll in y be carried the class described, the

movable toward and Vance of I said swing the same, a

the pressure upon the 11s, one pair thereof belng disposed behindupon one pair of said rolls 1 frame, of web- 1 combination,

toward or from said first mentioned feed; roll, a pivotally mounted lever engaging said by slack is produced in the web between said pairs of rolls, a weighted roller the slack portion of said web, and connecting said roller with tioned lever. a

11. In apparatus of the class described, the combination with the frame, of webfeeding means comprisin a positively driven feed roll carried by the frame, an idler. feedroll tioned feed roll, ,pivota'lly carrying said idler feed otall resting in means for roll, a lever pivy mounted upon the frame engaging whereby said idler feed roll may be carried toward or from said first mentioned feed roll, a pivotally mounted lever engaging said first mentioned lever andadapted to engaging the web and same and to be driven at a l velocity than that of flexible means connecting said second IIIBIlt-lOllQd lever.

two pairs of tating feed rolls spaced from the other and iigher peripheral velocity produced in the web between said pairs of rollls, said pairs of rolls being driven at'a re ative ly constant rate of speed, and means for automatically maintaining the length of lack portion pf the web substantially uniform. I 1'3. In apparatus of the class described, in combination, two pairs tating feed "rolls one pair thereof bein spaced from the other and being driven at a higher peripheral velocit' whereby slack is produced in the web between said rolls, said pairs of rolls being driven at a continuously robeing driven at a whereby slack is relatively constant rate of speed, and means f the web substantially In apparatus of the class described, in a pair of continuously rotating feed rolls adapted to f resting upon said first men-v mounted arms 4 arms *and adapted to swing the same,

second pair of feed rolls onepa r thereof being" I said second menof continuously romeans operating at a contension upon the web for controlling the action of said feeding means whereby the web is fed at a substantially uniform rate of speed, as desired.

In testimony whereof I aflix my signature, 15

two witnesses.

in the presence of i A. PRINGLE.

XVILLIAM \Vitnesses:

EDWARD KIRBY BATTLE, WVILLIAM 'ZINTER.

Images