US2639483A - Device for guiding weblike material - Google Patents

Description

May 26, 19.53 K. ca. WESTER DEVICE FOR GUIDING WEBLIKE MATERIAL Filed Oct. 23, 1950 Z W 4 W 5 1 ZZZzzz-F he Patented May 26, 1953 F6163l34 83 JDEYIDEKOR GUIDING WEBIAIKEJM'ATERIAL Karl Giista wiestea Stockholm, ":Swe'demsassignnr iden briken, Stuck'holm, 'Swe- Application OJctfiher .23, 1950, Serial No. 191,514 7 In Sweden "October 211, "1949 f'flhemresent invention relates to "new 53nd .1138- 1111'- improvements Ein drying marihines for web- 'like material, and more particularly to new and usefril mprovements in apparatus operable t'o direct or guide the *weblike material into the drying machine and nosition ii; in "the pr p transverse rla'tion *with a espeot' -to "the dryer;

when introducing cloth, epaper or other webl'ihe "material into a dryer it important that the web "is "(properly guided at the entrance for" the dr-yer in order to he positioned eori ectly with respect t!) the tenter eha'in or teriteripins which carry the web through the dryer. lBrior to rt/he present inventien, machines :of this type, a pair er contrdllers have been positioned at 'ropposit'e sides of the Web being fed tofthe dryer which control the transverse movement OT 'reedingearnrs that Fin turn feed the 'web to the tenterlframe. In if-rent ef the pair ,e'fzcdntrollers adjacent tlre feedend of the drying imachine edge straightening "elements are "provided which consist -of two or more spirally threaded rdlls *or "brushes imonn'terl i011 guide "arms operable to be moved transversel with :respect to fthe direction of movement or the "web. "in prior machines the :edge straightening elements and controllers 'have each been amounted -on the "feeding arms w hie-h are pivotetllzv mounted fte dryer trame ior lateral movement in order its) 5101- low "the edge --of the we'b-like material. By this constrncti'on the edge straighteners are a'fi'orded greater transverse movement than the conftrol lrs 101 control elements, and hence it iis "necessary that the nontno'l elements be moved trans 'verslv in order to contact the edge of the material and thereby cause further movement of the straightening elements. This produces a hunting effect which causes the side movements of feeding arms, control 'elements and edge straighteners ito be greater than the distance which is normally determined by the variations of the edges of the-web-hlike material being ifed to the rdryer. i

Withthe foregoing in mind the principal dleiect or the present invention .is to provide novel apparatus which eliminates Ith'is hunting effect of 'i-the control elements and edge straighteners caused by variations in the width of mater'ial red to the dryer. Accordingkto )the invention, H

two standard feeding arms are provided between which the web-like material is conducted and control elements are disposed adjacent the forward ends of the feeding arms at oppositesides of the web-like material to produce impulses for changing the distance between the feeding elemerits. "In addition, edge istraighteners are vided front iof the feeding arms and nontrol elements ifor straightening the :ed =of the matei iall reeing inserted into the drying machine. The edge straighteners flame :arran'ged 'On fseparaite supports and rare interconnected with the 'feeiiing elementaby m'eans ro'f an adjustable loose or resilient nonn'ection affording xlimited relative lateral movement bfe'tween said :support tan-d 'feeding arms ito'athereby prevent the :suppnrtfirom following m'inor movements -'of ithe :feeding caused .by slight variat ions in Zthe edge e: the material io'eing fed to the dryer; At the zsame' time, however, Ea relativelyslarge 'atransverse movement of the :reeding arms will zimnartssimv 'ilar movement :toithe edge .strai'ghteners--and oentrdl e'lem'ents.

The invention :will now "be "more fully described in r'eonn'edtion :w'ith ith'e emhedimentw of the inventi'on i illustrated ith'e accompanying tetra-w 'inss, which:

Fig. 1 is a side #dlevattin'nal view :of the ifeedend of a @dryer made in accordance with :the 'zpres-t entinventiorr;

i2 is ta fragmentary zplan "view of the fe'e end of the dryer illustrated in Fig. 1; and

ii ig. is .an enlarged .fragmentary :plan view partially !in section illustrating thedo'ose or me silie'nt connection between the support rifor.

' rstraiighteningi'elements and the feeding arms.

Referring more specifically "to the drawing, reietsrrce 5| (designates rgenerallythe \vebflike material-which :is tied into the-dryer;

IEhemateria-l l {passed ever 72. roll 2 and between a plurality of :edge straighteners d, 4 t iin the manner illustrated in LiFig. '51. The edge straighteners 3.; *4 and it rotate acontinuously and are provided alternatively vii-th zrigh't "left hand "threads which :cause the :edge of the Ema" ter'ial pas-singrtherehetwe'en "to be straightened in aconvontional manner. A drive motor (not shame) can-ted in 1a box-dike support 5 continu misty rotates the straightening elements 13% and 6. The support 5 is mounted :fior transverse movement with .Te'sp'ect to the direction of move merit of the web material for examplejby means wheelsanai-l 19 which engage a pair transversezgiiidesior rails llan'd I 8. 1

l' ivcjtatlg cent rearward eat of the dryer "and extend-mg ferwardlytlerefrerri to the inner end the straightening aments is a pair of feeding arms I0, Iii which are adapted to be pivoted in opposite directions perpendicular to the path of travel of the web about axes 20, 20. The feeding arms In, ID are partially broken away in Fig. 2 and consequently the rotation of the feeding arms will in fact take place about a greater radius than that shown in Fig. 2. Positioned inwardly adjacent the straightening elements is a pair of relay boxes I, I each of which contains a pair of switches (not shown) operableto control operation of a reversible motor in the usual manner which pivots its associated feeding arm. Depending downwardly from each of the relay boxes 1, 'l' is a' to be engaged by the edge of the web I and moved transversely by the variation in the transverse l; controller or feeler element 8, 8 which is adapted terial comprising groups of drive rolls mounted position of the edge of the web. Each con-- troller element controls operation of the switches in its associated relay box.

The side edges of the web material are en-f' gaged and grasped at the forward ends of the feeding arms by the usual tenter clamps or tenter pins arranged on endless conveyors, the forward endsof which are carried by the feeding arms. These clamps convey the material into the drying machine in the direction shown in Fig. 1. The tenter clamps are of conventional type and thus are not shown in the drawings. It is important, therefore, that the feeding arms maybe pivoted rapidly about their axes independently of each other to follow the variations in the transverse width of the web I. For this reason, each of the control elements 8 controls the operation of a reversible motor (not shown) by means of the switches in the relay boxes and cause rotation of the feeding arms back and forth respectively in relation to a particular normal position. For example, each control element 8 is adapted to engage two switches in its associated relay box I. When a control element is moved outwardly from the center line of the web it closes one of the switches'and causes operation of the motor in-the direction which moves the feeding arms away from the midpoint of the web. In a similar manner, actuation of the control element in the opposite-direction reverses the operation of the motor and moves the feeding arm toward the midpoint of the web.

In accordance with the present invention means are provided for interconnecting the edge straighteners 3, 4 and 6 with the feeding arms l0, ID to cause the edge straighteners to move transversely of the web along with the feeding arms. However, it is desirable to prevent movement. of the edge straighteners when the feede ing arms are only moved a slight distance-due to small variations in'the transverse Width of the web' in order to prevent a huntingeffect in the operation of the machine. This is accomplished by providing a loose connection joint 9, 9 between the' support boxes 5, 5 and the feeding arms I0, 10. This loose connection is illustrated in Fig. 3 and interconnects the extreme forward end of the feeding arms Ill with the rear surface of the supports 5. The feeding arms In each have a projecting pin or guide 23 extending outwardly from the forward end thereof which is engaged in an oval aperture 22 formed centrally of a bracket 22a mountedon each support 5. Thejoints 9, 9 are adjustable by means of two bolts 2| and 24 threaded into the bracket 22a at opposite sides of the aperture 22.- -By this construction it is possible to limit on each of said support carriages and arranged to engage the adjacent edge portion of said material, and a loose connection between each of .said feed arms and adjacent support carriages providing limited freedom of lateral movement of each feed arm relative to said adjacent support carriage so that lateral movement of the feed arms withinthe limits of said loose-connections is not imparted to the adjacent support 2. In apparatus for guiding web-like material comprising, a pair of feed arms pivotallymounted for independent lateral movement, a support carriage mounted endwise adjacent eachfeed arm for movement in opposite directions transversely of the direction of travel of the -material, straightening means for the edges of the material comprising groups of drive rolls mounted on each of said support carriages and arranged to engage theadjacent edge portion of said material, control means engageable, by the opposite side edges of the material for effecting lateral movement of said feed arms in response to variations in the transverse position; of the edges of said material, and a loose connection between eachof said feed arms and adjacent support carriages providing limited freedom of lateral'movement of each feed arm relative to said adjacent support carriage so that lateral movement of the feed arms Within the limits of said loose connections is not imparted to the ad: jacent support.

3. Apparatus as claimed in claim 1 wherein the loose connection between each feed arm and support carriage comprises a projecting element carried by one of said members and a ring element of greater lateral dimension than said projecting element carried by the other member, the said projecting element-having its end portion extending freely into the ring element, and said ring-having therein elements selectively adjustable to predeterminedly limit freedom of lateral movement of the projecting element within the ring element.

Number Name Date 739,968 Wood et al Sept. 29, 1903 1,312,153 Barton 1 Aug. 5, 1919 1,337,530 Page Apr. 20, 1920 1,342,935 Bancroft June 8, 19 0 1,419,049 Harsel et a1. June 6, 1922 2,297,858 Andreotto Oct. 6, 1942 2,557,492 Young June 19, 1951' 2,595,233 Dungler May 6, 1952

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