US1550241A - Roll stand for printing presses - Google Patents

Description

Aug. 18, 1925. 1,550,241

A. J CLJNE ROLL STAND FOR PRINTING PRESSES Filed Oct. 4. 1924 2 Sheets-Sheet 1 v-l L I INVENTOR Aug. 18, 1925.

v A. J; CLINE ROLL STAND FOR PRINTING PRESSES 2 Sheets-Sheet 2 Filed Oct. 4. 1924 v INVENTCR A ORNEY Patented Aug. 18,1925.

UNITED STATES-PATENT OFFICE.

I ALLAN J. onus, on onIcAeo. ILLINOIS, AssIsNo-nrb oLInn nLEcria o 'uenuraoroams, COMPANY, or CHICAGO, ILLINOIS, A conronnrron or rumors.

' ROLL s'rann Fon rnm'irme rnEssEs.

Application filed October 4, 1924. Serial No. 741,528.

ing had ,to the accompanying drawings,

' forming part thereof.

In high-speed presses, particularly those used in the printingiol' newspapers, it is desirable that the web of paper fed into the press shall be handled in such a manner as to minimize stoppages of the .press'and interruption in the feeding of the] paper,

due to breakage of the web, exhausting of a roll f paper or,other causes. Asis well known, the rolls of paper used with such presses each weigh'about a ton and the web'of paper'is fed therefrom into' the.

press at the rate -of 1200' feet a minute, more or less. Q It is the present practice to provide printing'presses with roll stands or devices forholding a plurality of the large .rolls ,of paper, the web being takenfrom one roll until that roll is substantially exhausted,

rotated sufliciently to bring :a fresh roll into operating. position; thereupon the web of the new roll is pasted to the expiring web, the new web being then drawn by the press and the old web being severed back of the pointof pasting. The stub of the expired roll is then removed and a fresh ro inserted in its place. With this apparatus it is thepractice to make what is known as. a flying pastel, which is t 'e joining of the'new web to the old web automatically without entirely stopping the press, so that the turning out of an edition is practically continuous. VlTith this ap-- paratus the degree of tension upon the web .whichthe press is drawing t5 itself from the roll is controlled by a traveling belt driven by the same power. which drives the press, the belt speed being slightly less than the s eed of the web of pa er.

elt is a relativelyls ort endless belt carried upon a pair of pulleys mounted at T either end of a frame-work pivoted at its" upperend and hanging downward so that the belt restsiagainst the roll of paper from which the web'is being drawn by the press;

This travel the roll travels in the same direction, asthe roll and, as above noted, at a shghtl less speed. The belt, therefore, acts as -ajb upon the roll so asto measurably afiect and The surface of the belt contacting with rake control the momentum of the heavy roll of paper when the-press is. slowed down- ,or stoppedso as to, minimizethe possibilityof flooding the press with paper frq'mfithe .1111- controlled and rapidly rotating roll,

With this arrangement, the angular position of the belt frame varies as the paper on ,the roll is Withdrawn 'andthe'diamet-er of the'roll diminishes, gravity compelling the belt audits frame to follow thedimin ishing roll of paper. The presencefiofthe.

belt surface acts as a background against which the new roll of paper may press the expiring web in the makin pas'ter referred to. In anticlpation of sac paster the front edgeof the new roll is tact with the expiring web and against the traveling gait, the friction between the ex issufiicient to cause the new IOH'I'D start rotating and bring the flap of-such new $011 whereupon the supporting mechanism is with itsadhesive into [contact with the expiring weby being pressed,.,into contact. therewith and adhering thereto. whereupon given an application of an adhesive so that when it. is swung by its frame. into conp1ringwbifind the surfacefofthe new roll 7.

the press draws the web from the new roll with A the expiring web, the latter being severed by the attendant back of the joint. This flying pasterri's made with the press running at reduced speed, but without stopping. The travelin belt is not essential to the making of a yin'gpaster, it serving merely to give an added backing. against which the fresh roll can press in effecting the joining with the expiring web.

My present invention has as its ob ect the discarding of a traveling-belt and the substitution therefor of a stationary apron and to associate therewith means for regulating the tension imposed upon such apron so that one degree of contact may be" secured for normal operation and a difierentand greater pressure impose when he press is abruptly stopped for any reason, isespecially' desirable to prevent flooding the I press with an excess of paper. y

I have shown the preferred form of my invention in the accompany ng drawings, in which like parts are given similar referonce numerals and in which Fig. 1 illustrates a side view of my stand equipped with three aprons; Fig. 2 is an end view of my stand showing an apron in contact with the roll of paper from which the web is being drawn by the press, the apron being given the desired tension by the application of a suitable weight; Fig. 3 illustrates an end view of a portion of my roll stand and the working roll of paper, in connection with my apron, suitable tension upon which is imposed by springs; Fig. 4 is a side view of my device with three aprons, spring controlled; Fig. 5 is one form of automatically controlled tension device for my aprons and Fig. 6 is a modification thereof.

In general it may be pointed out that my roll stand comprises a rotary shaft '1 carried by end supports 2 and equipped with triplearm devices 3 adapted to engage the ends of rolls of paper 4: by suitable means 5, the position of which is controlled by hand devices 6. The angular position of the arms 3 is controlled by an electric motor 7 co-opcrating by suitable means with the large gear 7. The adjustment of the margin of the printed paper is secured through the control of an electric motor 8 which serves to move the shaft 1 back and forth in its bearings 2.

In Fig. 2 the web 4 is shown as going to press from the lower right-hand roll of paper 4, against the outer surface of which presses a stationary belt or apron 9 supported at its upper end by the rod 10 held in bearings 11. The lower ends of aprons 9 are secured to the cross-rod 13, to which are attached suitable weights for imposing the desired forcible contact of the aprons against the roll. It will be seen that the lessening diameter of the roll, due to the withdrawal of paper therefrom, is accompanied by a decreased angle for the apron, thus automatically reducing the force of contact as the necessity for retarding efi'ect diminishes. As shown in Figs. 3 to 6, I can substitute for the weights 12 the springs 14 which are attachable to the crossbar l3 and suitable stationary supports as 15. I also prefer to interpose between the ends of the aprons and the cross-bar 13 smaller springs 16 tending to make uniform the tension on the several aprons and to compensate for or accommodate the irregularities of contour of the rolls of paper, all tending to increased efficiency of operation.

Where the press is running at substanially constant speed, only a limited tension is required upon the aprons, but when the press is suddenly stopped or made to run.

more slowly the tendency is for the roll of paper to keep on unrolling at its existing speed with consequent danger of flooding the press with too much paper. I obviate this possible difficulty by automatic devices,

forms of which are illustrated in Figs. 5 and 6. In Fig. 5 the heavy springs 1d are attached to the pivoted lever arm 17 which is held in a normally operating position by the latch 20. The latch 20 is controlled by a solenoid 21 actuated when the speed of the press is suddenly lowered, at which time the weight 19 upon the lever 17 causes the lever to be depressed, thusautomatically extending the springs 14 and 16 and imposing the necessary braking force upon the surface of the rotating roll. The precise electrical connections for the solenoid are not shown in the drawings as those familiar with this art know that the pushing of an emergency button on the press actuates switches for opening the main circuit to the press-driving motor and at the same time act to bring into play some braking device. For example, in one well-known system the pressing of the emergency button actuates a solenoid which opens the main motor circuit and at the same time short-circuits the armature and series field-coils of such motor through an appropriate resistance, converting such motor into a dynamic brake. In Fig. 5 it is to be understood that the solenoid 21 is so connected through such emergency button circuit as to be actuated as the driving motor is cut off any one of several well-known connections may be used. Fig. 6 shows a modification of this arrangement, the latch 20 having substituted for it the plunger 93 hooked to the lever 17 by suitable means, as the link 24, the plunger 23 being drawn down by the solenoid 22 actuated in time of emergency by suitable controlling switches, not shown; the drawing down of the lever 17 by the solenoid 22 results in an extension of springs 14 and 16, thus imposing the required additional strain by the aprons 9, tending to stop furtherrotation of the roll of paper. In this-application I am not including claims covering the above described automatic devices, such claims appearing in a divisional application hereof, Serial No. 15,207, filed March 13, 1925.

I claim as my invention the following:

1. A roll-stand for printing presses comprising a rotatable supporting member for a plurality of rolls of paper, means for adjusting the position of such member, aprons supported from abovethe roll from which the wel.) is withdrawn by the press and held under tension against the surface thereof and serving as a retarding device for such roll to maintain the web taut and also, providing a. backing against which a new roll may be made to press the web of an expiring roll when making a flying paster.

2. A roll-stand for printing presses comprising a rotatable supporting member for a plurality of rolls of paper, means for adjusting the position of such member for margin and web-feed, aprons supported from above the roll from which the web is withdrawn by the press and held under tension against the surface thereof and serv- 'ing as a retarding, device to maintain the Web taut and also providing a backing against which a new roll may be made to press the web of an expiring roll when making a flying paster.

'3. A roll-stand for printing presses comprising arotatable supporting member for a plurality of rolls of paper, means; for adjusting the position of such member, aprons supported from above the roll from which the Web is withdrawn by the press, and spring tension devices secured to such aprons and serving to hold the aprons in frictional contact with the surface of such roll.

4. A roll stand for printing presses comprising a rotatable supporting member for a plurality of rolls of paper, means for adjusting the position of such member, a plurality of aprons supported from above the active roll and on the side of the roll stand toward which the reel is moved in bringing a fresh roll into operating position, such aprons servinglto hold the traveling web unplurality of rolls of paper, means for adjusting the position of such member, aprons supported from above the roll from which the web is withdrawn by the press and means for applying tension to such aprons comprising a transverse bar to which the lower ends of all the aprons are spring connected and additional tension devices secured to such bar and serving to maintain contact between the aprons and the roll of paper from which the web is drawn into the press.

ALLAN 'J. CLINE.

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