US2434128A - Web guiding apparatus - Google Patents

Description

' Jan- 6, 19 8. w. 1'. STANFORD IEB aumma APPARATUS Filed April 11, 1945 2 Sheets- Sheet 1 //7 Ven for 142 fora e y W- 7: Sfcmf Jan. 6, 1948. v w, TAN 2,434,128

WEB GUIDING APPARATUS Filed April 11, 1945 2 Sheets-Sheet 2 VV- 77.5fm; are,

izing spring means against the Patented Jan. c, 1948 2,434,128 WEB GUIDING APPARATUS William '1. Stanford, Salem, 111.

Application April 11,

4 Claims.

This invention relates to machinery for winding and rewinding paper, cloth, or like webs, and more particularly to novel improvements in regulator means for evenly winding the web from one roll to another.

In the prior art known to applicant, the pressure equalizing spring means for maintaining a normal or neutral position of the -diaphragm and the connected shift lever is mounted on an extension from the center of the diaphragm. This arrangement, while producing fairly good results, nevertheless, causes undesirable extraneous deflections of the diaphragm when the shift levers are pivoted outwardly during operation. These deflections-of the diaphragm are caused by the tensioning reactions of the equaldiaphragm supported center connection. Such deflections from the counter-force produced by the Spring reactions impair the sensitivity of the diaphragm and increase the strain on the diaphragm.

Heretofore, also it was found that in such known devices the spring reactions increased the extraneous diaphragm deflections even more when greater loadswere applied to the spring means by using more levers and links for shifting two or more shafts to control edge alinement of the winding web.

Accordingly, an object of the present invenequalizing spring means on a firm base adlacent the diaphragm, so as to overcome the above-mentioned disadvantages of mounting the spring means over the center of the diaphragm.

Another object is to make it practical to shift two or more shafts to provide for substantially instant control of the moving web during winding from one roll to another.

A further object is to provide for shifting the winding roll shaft simultaneously with an associated web tension shaft so as to provide for winding the webswith alined edges at greater speeds than heretofore practicable.

With the above and other objects in view, which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated, and claimed.

One practical embodiment of the present invention is shown in the accompanying drawings inwhich:

Figure, 1 is a diagrammatic illustration of the relative positions of the supply roll and the wind- I 1945, Serial No. 587,671 (Cl. 242-16) 2 ing roll with their several associated guide and tension rollers.

Figure 2 is a ulator means as t paper machine, such as trated in Figure 1.

Figure 3 is a front elevational view of the conshown in Figure 2, below the line 4-4. taken through the shift side elevation of the novel regit appears when applied to a diagrammatically illuslever along in plan a top view of the regulator spring means.

Similar reference characters designate corresponding parts throughout the several views of the drawings.

For example, with reference first to Figure 2, the invention broadly includes a supply roll A mounted on a shaft A and journaled for rotation in suitable bearings A. This roll is adapted to carry the supply of paper which is to be unwound or unreeled onto another for example, as winding roll known, the winding roll B is mounted on a shaft 13', which shaft is mounted and journaled in suitable bearings It for rotation and in such 'a manner as to provide for axially shifting the shaft in its bearings B In Figure 1 there is shown, for example, a diagram of the relative positions of the hereinbefore referred to shafts and their associated guide rollers and tensioning rollers, wherein A is the supply roll, D are guide rollers, E is a tensioning roller, which may or may not be shiftable axially in the bearings, G is another web tensioning roller, which is herein described and illustrated as being shiftable in its bearings G, and B is a winding roll shaft,

which is shiftable simultaneously with the shiftable tensioning roller G.

Thus, as the web of paper C is unwound from roll A across guide rolls D around the web tensioning rolls E and G to the winding shaft B it is essential that some means be provided for shifting some or all of the shafts and rollers promptly upon any disalignment of the edges of the web as it is wound on the shaft 13.

Accordingly, to accomplish this alignment of the web edges efficiently at high speeds of roll rotation, it is desirable to develop highly sensitive means for automatically aligning the edges provide an automatic means for shifting lag so as to maintain alignment of the-roll web edges.

I attain these improved results and the foregoing'objects referred to by providing improved the roll shafts without one or more of its associated tensioning rollers thereby causing variations in pressure in the pipe align the edges of the web as it is wound on the of the diaphragm 6.

In Figures 2, 3, and 4 are shown the improved chamber formed by the wall 5 and diaphragm 6 novel means -i'or simultaneously shifting the the degree oi'partial vacuum maintained in the aforementioned shaft 3' and the web tensioning pressure chamber 5 is varied. thereby causing a roller G. It comprises a casing or housing conproportional movement of the diaphragm 6 so as sisting of a rigid wall 5 which is shown as dish- 10 to force the diaphragm outwardly from the rigid nulus or ring 8, so as to provide an effective seal edge of the lever 23 strikes against the bottom 01' their convolutions encircle a pair of spaced lugs lever 23 causes the shaft B to axially shift in its of tubular members It and I! which extend half upper nd i onn ct d to th n nin roller the length of the said coil springs 9 and i0 when 25 G moves outwardly to thereby axially shift the they are in their natural positions so as to pro- Said Teller n s b ar n s G". vide skirts around part of the springs. Also de- Thus, by shifting both the winding roll B and pending from the bar [5 is a bolt I 8 and attach d the tension roller G there is an instant alignment to the bolt I 8 is a yoke l9. Transversely mounted efleeted the Wound edges of t W C, o that between each arm of the yoke I9 is a pin 20 near 0 the p per m chine may be operated at most any the end extremities of the yoke arms 2| and 22. required winding speed- The location of the boxlike head 4| in proxyoke is positioned a shift lever 23, which lever imity to the tension roll and winding roll makes to the shaft B of the winding roll B and at its dispense with the means of the prior art for rein turn is pivotally connected to a second shift 0 or diaphragm 6, it is possible to keep the box 4| Secured to the center of the diaphragm 6, as be readily apparent to those skilled in the art, by soldering or the like, is a button 30. This butand it will, of course, be understood that changes ton 30 may have a yoke 3i secured to it in any in form, proportion and minor details 01' consuitable manner. The yoke 3| is provided with struction may be resorted to, without departing arms between which is positioned an interfrom the spirit of the invention and scope of the mediate portion of the lever 23. appended claims.

At this portion the lever 23 is provided with an I claim: elongated slot 34, through which extends a trans- 1. In an apparatus for winding a web of mateverse pin 35 mounted between the arms of the rial from one roll to another in edge to edge alignyoke 3|. Thus, there is provided a connection ment,asupply roll,awinding roll,atension roller,

23 and corresponding compression or expansion 00 means being connected together to provide Joint of the springs 9 and ID has no reactive effect on operation, pressure responsive means adapted to the diaphragm 6, as the springs are mounted on actuate said first-named means, and pilot means asolid base. having a conduit leading to one side of aid seea flexible tube or pipe section 39 to a regulating :0 ing roll and the tension roller longitudinally on orifice in the head ll is so positioned with respect 2. In an apparatus for winding a web or strip to the e of h W C th t it 1 partially material from one roll to another in edge to edge covered by the web and upon any deviation of the lignment, a supply roll, a winding roll a tenweb edge during winding. this orifice becomes sion roller, bearings for rotatably mounting said Supply roll, bearings for rotatably and shiftably trolled by the web for simultaneously automaticalmounting the winding roll and the tension roller ly shifting the winding rolland tension roller longitudinally along their axes, linkage means while unwinding the web from the supply roll, adapted to connect said winding roll and tension said means comprising a control device including roller together, and a pilot member in contact a housing having a rigid dish-shaped wall and a with and traversed by said web having an elonflexible diaphragm adapted to define an air-tight gated opening therein adapted to be variably exchamber connected with a vacuum pump, a flange posed and closed by changes in position of the around the rim of said rigid wall for mounting .web for automatically and simultaneously actusaid diaphragm thereon, an annulus adapted to ating the linkage means and thus axiallyshift the seal said diaphragm to said flange, lugs projecting winding roll and tension roller relative to the supfrom said annulus, spring means around said lugs ply roll axis to thereby maintain the wound web seated against said annulus, a lever extending edges in alignment on the winding roll. between said springs, a yoke having arms strad- 3 In an apparatus for winding a web from one dling said lever, means extending across the ends I roll to another in-edge to edge alignment, 9, supply of said yoke arms adapted to loosely confine the roll, a winding roll, a tensio roller, bearings for said lever between the yoke arms, a bar secured rotatably mounting said supply roll, bearings for to the head of the yoke adapted to engage with rotatably and shiftably-mounting the winding roll the ends of said springs, a second yoke extending and the tension roller longitudinally along their centrally from the diaphragm connected to said axes, linkage means adapted to connect said lever at a slotted intermediate point thereof, a winding roll and tension roller together, and pilot device positioned against the web havin an means controlled by the web for automatically orifice positioned to be covered in whole or in part and simultaneously actuating the linkage means by the edge portion of said' web during winding and thus axially shift the winding roll and tenthereof, a tube connecting said orifice with said sion roller relative to the supply roll axis to therechamber, means carried by said lever connected by maintain the wound web edges in alignment to the said winding roll and said tension roller on the winding roll, said means comprising a conadapted to axially shift the said winding roll and trol device including an air- 'ght housing oontension roller accordingto the-fluctuations im- 'nected with a vacuum pump, having a wall thereparted to said diaphrag again t the tension of of defined by a flexible diaphragm, a lever consaid springs by variations ofpressure developed nected with said linkage means and the center in said chamber during the i di of the W of said diaphragm, and spring means mounted on v r h Orifice of said Pilot i said housing adapted to provide iiualizing ten- WILL '1. STANF RD. sion for vary g pressures in the ousing as the diaphragm actuates the said lever. REFERENCES CITED 4. In an apparatus for winding a web from one The following references are of record in the roll to another in edge to edge alignment, a supfile of this patent: e

ply roll, a winding roll, a web tension roller, means for rotatably mounting said supply roll, UNITED STATES T means .ior shiitably and rotatably mounting the 40 Number Name Date winding roll and the tension roller ontheir axes 1,040,869 Brand Oct. 8, 1912 relative to the axis or the supply roll during wind- 2,239,412 Stanford Apr. 22, 1941 ins oi the web on the winding roll, and means con- 2,281,965 Wylie May 5, 1942

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