US702546A - Printing-press. - Google Patents

Description

7 Patentediune [7, I902. A. E. DUWELL.

PRINTING PRESS. (Application filed Sept. 20, 1901.

(NollodeL) 2 Shani-Shoat I.

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Tajmm. vusnmomu u c No. 702,546. Patented June l7, I902. A. E. DOWELL.

PRINTING PRESS.

(Application filed Sept. 20. 1901.)

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UNITED STATES PATENT OFFICE.

.ARTHUR E. DOWELL, OF WASHINGTON, DIsTRIoT OF COLUMBIA, AssIeNOR, BY MESNE ASSIGNMENTS, TO DETROIT TRUST COMPANY, TRUSTEE, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

.PRINTING-PVIRPESS.

SPECIFICATION forming part of Letters Batent No. 702,546, dated June 17, 1902.

Application filed September 20, 1901. Serial No 75,841. (No model.)

To all whom it may concern:

Be it known that I, A THU E.-DowELL,of Washington, in the District of Golumbia,have invented certain new and useful Improvements in Printing-Presses; andI hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

This invention is an improvement in means for actuating looping-rollers of web-handlin g machinery and the looping-rollers of type web-perfecting printing-presses in which an intermediate part of a continuously-moving t 5 web is intermittently retarded or stopped and started by means of looping bars or rollers, and the invention is particularlydesigned for use in flat stationary bed reciprocating impression-cylinder web presses of the type known as Cox duplex? perfecting-presses,"

andv in the accompanying drawings the inventionis illustrated asapplied to such a press; but of course the invention maybe" used wherever movable looping-rollers are 2 5 employedto control the movement of the web I and wherever it is desired to provide means for varying the throw or extent of lateral reciprocating movement of a looping-roller,

so as to cause it to take up and give off more or less web in a given interval of time.

The object of the invention, therefore,'as applied tothe Cox duplex press is to enable the throw of the looping-rollers to be varied while. using the san'ie cam mechanism or to vary the amount or. movement of'the weblooping rollers in accordance with the speed of the continuous in-feed and out-feed of the web, so that the press can be readily adapted to operate upon different lengths of sheets 40 without changing the cam mechanism which operates the looping-rollers.

In the 00x duplexpress as heretofore made but one length of sheet could be printed upon, the length of such sheet being controlledby 5 the speed of, the feed-rollers and the cam mechanism operating the looping-rollers being designedgand adapted to take care of but one length of sheet. By my invention the speed of the web-feed rollers in such presses may be varied by any usual means, so as to feed in more or less web during each recipro-- cation of the cylinders. This means for varycry-rolls O 0, as indicated in Fig. 1.

ing the feed of the web, not forming part of the present invention and being old, is not illustrated herein; but of course if the feed varies the movement of the looping-rollers must be proportionately varied,.else the tens'ion of the web would be lost or the web Referring to the drawings, K K designate a set of feed-rolls and tapes, by which the web is'drawn into the press from the web-roll NV. The web to passes up over a looping.- roller Z, thence down under a guide-roller M to and through the printing mechanisms of the press, (not shown,)back over an upper looping-roller M", down under an internal looping-roller Z, 'and thence up to the deliv- The feed and delivery rollers K and O are driven at a uniform speed by means of a connecting train of gearing, so that the web is continuously fed into and out of the pressat a unifornl rate. The looping-rollers Z Z arejournaled in a re-' ciprocating frame L, which is moved up and down by a cam mechanism at such rate and in such time that during the taking of an impression the lower looping-rollerl takes up tr'ates a modification of the invention, and 'Fig. 3 illustrates another modification.

all the web that is fed in'by, rolls K, and during the same time the upper looping-roller Z gives out the web as it is required by the continuouslyrunning delivery-rolls 0. Therefore during the taking of an impression that portion of the web between the guides'M and M is stopped.

After the impression is made the frame L is lowered, so that the loop of web formed on the lower roll I is given ofi, while a like quantity of web is taken up in theelongated loop' formed by the descent of the looping-roller Z.

Heretofore this looping-frame Z has been reciprocated by means of a race-cam D and a vibrating lever A, having a cam-roller (Z running in the groove of cam D, the free end of lever A being connected to the lower extremity of the frame L, as in Ooxs patent, No. 501,456. By this construction the looping-rollers Z 7, had given only one predetermined extent of vibration and their throw could not be altered to accommodate variable feed and deliveryof the web except by changing the cam D, which was virtually impractieal. The parts thus far described are old.

My present invention consists in providing the vibrating lever by which the loopingframe L is operated with an adjustable fulcrum, by shifting which the throw imparted to the frame from the same cam D may be variedi. 8., made greater or less-so that the looping-rollers may be easily adjusted to take care of variable lengths of web fed in and delivered from the press by the feed and delivery rollers K and O, which are preferably driven by gearing so proportioned that the desired length of web will be fed and delivered by the rolls K and O for each rotation of the cam D. As shown, rolls K are driven from the cam-shaft by means of a gear E, an intermediate E, and a pinion E on the shaft of one roll K. By substituting different-sized pinions E on the roll-shaft and shifting gear E so as to continue to mesh therewith and with gear E the speeds of the feed-rolls can be easily varied.

As shown in Fig. 1, a lever B is pivoted just above lGVBlA, and its front end is connected to the lower end of frame L byalinlc b. The pivot of lever B is considerably nearer the frame L than the pivot of lever A. Upon lever A is an adjustable fulcrum a, upon which the lever B is supported. Lever A may be held down by a spring A, if desired, and lever B may be held down by a spring B, as indicated in Figs. 1 and 2. It will be seen that lever B is vibrated by and from lever A, to which a uniform throw is imparted by the cam D; but the throw of lever B is variable and depends upon the position of the fulcrum a on lever A. If this fulcrum is adjusted to the extreme outerend of lever A, as indicated in Fig. 1, lever B will be moved to the least extent; but if the fulcrum a, is moved inward toward the cam D the extent of throw of lever B will be increased more and more as the fulcrum approaches the cam. This variation in the throw of lever B is due to the fact that its pivot is so far in advance of the pivot of lever A that although the vertical movement of the fulcrum a decreases as itis moved toward the pivot of lever A the throw of lever B is increased in a greater proportion, because the fulcrum a operates on lever B so much nearer the pivot thereof. This is obvious from the drawings and further explanation appears unnecessary. By properly adjusting the fulcrum on lever A, therefore, the looping-frame L can be given any desired.

throw between certain extremes, and thus can be adjusted to take care of any length of web that may be handled by the feed and delivery rollers during the impression. The proper position of the fulcrum to compensate for varying feeds of the web can be calculated beforehand and marked upon the levers A or B, so that the pressman after putting the proper driving-pinion E on the feed-roll shaft can adjust the fulcrum a to the correspondingproper pointon the lever. As shown, the fulcrum may be shifted by a screw-shaft a but the particular form of the fulcrum and the means for shifting it are not essentials of the invention.

In the modification shown in Fig. 3 the upper lever B is pivoted at its front end at a point beyond the frame L. Consequently when the fulcrum a is at the extremity of lever A it will impart the greatest movement to the lever B and when the fulcrum ct is shifted toward the cam-roller (l the throw of lever B will be lessened. The operation and effect of the device, however, are substantially the same as in the construction shown in Fig. 1.

In Fig 3 the secondary lever B and B is omitted, but the lever A is extensible, being provided with a telescopic portion A which is pivoted to the fulcrum A which is adjustable on the frame. As shown, it is adjustably secured to a rib A 011 the main frame. By adjusting the fulcrum A toward or from the cam-roller (Z the extent of vibration of the lever will be varied, and consequently the rise and fall of the looping-frame L will be correspondingly varied. This latter modification Ido not consider as desirable as either of the former, because a much greaterlinear adjustment of the fulcrum will be necessary than in the other modifications to correspondingly vary the throw of the loopingframe L.

I do not Wish to confine myself to the particular construction or application of the device herein described except where specifically mentioned in the claims, as the principle of the invention once disclosed maybe embodied in various constructions and utilized in various machines.

Having thus described my invention, what I therefore claim as new, and desire to secure by Letters Patent thereon, is

1. In a printing-press, the combination of web-forwarding mechanism a web-looping roller, a vibrating lever for operating said looping-roller, a cam for operating said lever, and a fulcrum for said lever adjustable to and from the cam whereby the extent of vibration of both lever and looper may be regulated, substantially as described.

2. The combination of changeable-speed web-forwarding mechanism a web-looping roller, a vibrating lever operating the looping-roller, a cam for vibrating said lever, and an adjustable fulcrum. below and directly ongaging the under side of the lever and. adjustable to and from the cam whereby the throw thereof produced by the cam and the throw of the looping-roller may be varied, substan ver for operating the first pivoted lever, an'

adjustable fulcrum between the first and sec ond levers, and means for vibrating the second lever, substantially as described.

4. The combination in a printing-press of web-feeding devices-andmeans for changing their speed, a looping-roller adapted to take up the web fed in thereby during an impression, a pivoted lever for operating the looping-roller, a second pivoted lever and an adjustable fulcrum thereon for operating the first pivoted lever, and means for vibrating the second lever, substantially as described.

5. The combination of continuously-operatingchangeable-speed web-feeding rolls, a movable looping-roller for giving an intermittent movement to the web,'a vibrating lever for operating the looping-roller, a cam for actuating said 'lever, and an adjustable fulcru'm for said lever adjustable to and from the cam whereby the throw of the lever and connected looping-roller may be changed in accordance with the changed speed of the feed-rolls, substantially as described.

6. In a printing-press, the combination of the continuously-operating web-feeding rolls, means for changing the speed'of said rolls, a movable looping-roller for the web, a vibrating lever for operating the looping-roller, a second vibrating lever below the first lever, a cam for actuating .said second lever, and an adjustable fulcrum on the latter lever engag ing the first lever whereby the throw of the looping-rollermay be changed in accordance with the changed speed of the feed-rolls, substantially as described.

7. In aWeb-printing press, the combination of means for continuously feeding a web, a vibrating looping-roller coacting with the feed devices in handling the Web, a vibrating lever for operating the looping-roller and a cam for operating said lever; with means for chang-I ing the speed of the feed devices and a fulcrum for the lever adjustable toward and from the cam whereby the extent of the vibration thereof can be changed to compensate the movement of the looping-roller for the changed speed of the feed-rollers, substan tially as described. I

8. The combinationof continuously-acting rolls for moving a web of paper, and a movable looping-roller for causing an intermittent movement of part of the web, avibrating lever for actuatingthe looping-roller and a cam for operating said lever; with means for changing the speed of the rolls, and a fulcrum for the lever adjustable to andfrom the cam whereby the extent of the vibrations imparted thereto by the cam maybe varied to compensate the movement of the loopingroller for the changed speed'of the feed-rollers, substantially asdescribed;

9. In a web-printing press, the combination of continuously-acting rollsfor moving a web of paper, and a movable looping-roller for causing an intermittent movement of part of the web, a vibrating lever for actuating the looping-roller; with a second uniformly-vibrating lever, and an adjustable fulcrum thereon for actuating the first'lever there 7 from whereby the vibrations of the first lever may bevaried to compensate the movement of the looping-roller for any change of speed of the feed-roll, and means-for changing the speed of the feed-rolls,substantially as described. g

10. The combination in a printing-press of changeable-speed web feedin'g" rolls, a looping-roller adapted to give up a loop of web to I the feeding-rollers'during an impression, a

lever foroperating the looping-roller,- andan adjustable fulcrum for said leverwhereby the extent of vibration of the lever and looper can be regulated in accordance with the speed of the feeding rolls, substantially as described. I d

11. The combination in a printing-press, of changeable-speed Web-feed rolls a loopingroller adapted to take up the web fedinfby the feed-rollers during'animpression a lever for operating the looping-roller and an adj ust-.

able fulcrum for said lever to regulate the extent of vibration thereof according to the speed of the feed-rolls, substantially as described. V

12. The combination of means for continuously feedingaweb of paper; a web-looping roller coacting with the feed devices; means for changing the speed of said devices; a 1c-.

IIO

with to alternately stop and move the inter-' v I mediate portion of the web, a vibrating lever for operating said loopingrollers and a cam for vibrating said lever; with means for changing the speed of the feed and delivery rolls, and an adjustable fulcrum-for the lever whereby the extent of vibration imparted thereto by the cam can be changed'so'that it will properly move the looping-rollers in accordance with the speed of thefeed and delivery rolls. i p

In testimony that I claim the foregoing as my own I affixv my signature in presence of two witnesses.

ARTHUR E. DOWELL. In presence of JAMES R. MANSFIELD,

T. 'H. ALEXANDER.

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