US1789515A - Paper making - Google Patents

Description

l H' G- 'CRAM ET AL PAPER MAKING Filed Aug. 19. 1927 from the last press to the drierand for'pass- Patented Jan. 20, 1931 HEIWEY e.. CNAMl AND Novr GREAT NORTHERN PAPPAv oP MAINE Appucation me@ August 19, 1927. rsapin Nazi-1,190.

This invention relates to `paper making machines and especially to an apparatus for and a method of transferring sheet and particularly the lead strip thereof ing it automatically through the drier` and about the drying4 rolls thereof. Y

This invention is particularlydesirable in machines in ,which the paper. is .passed l through the last pressreversed although the invention may be used in connectionfwith machines which do not reverse the paper at the last press. 'Heretofore, the paper sheet, or the lead strip thereof, has been passed from the last press to the driers by hand or by the shown in theV Pope Patenty No. 1,338,094, dated April 27,-

use of air blasts of the type The'driers of some papermaking machines are provided with a pairof bands or lropes known as Sheahan ropes which extend between and around the drying, rolls of :the drier forV the purposeV of gripping the lead strip inserted between the ropes and carrying it automatically through the drier and aroundv the rolls thereof.`

It is an object of thisinvention to extend the carrierropes of the drier to the last pressv between the press and and across the `space p that the the drier and so arrange theropes lead strip is inserted press and is caused tol be carried automatically from the press to they drier and around the rolls thereof, thusV to hand and air blast methods; 4

It is a further object of this invention to provide an apparatus and a method forautomatically transferring the lead strip by mechanical means from the last' press to the drier. y

A yet further object of the invention is to engage the lead strip at the last press and carry it mechanically to and through the drier and about the drying rolls thereof.

A further objectV is generally to improve the construction and operation of paper making machines. Y

Fig. 1 is a diagrammatic side elevation illustrating the construction of a paper making machine embodying this invention at thev. wELDoN,

COMPANY, orA MILLINQCKET; MAINE, A CORPORATION themoving paper 4 of the essential elementsoffFigQ1` and illustherebetween 'at the last 1 dispense with* the p 20a and is removed oP MIIIJINQGKEP, MAINE, AssIGNoRs frol PAPER MAKING Y l end ofthe reversing press and atithe beginning-'of the drier. V f

Fig. y2 is a perspective diagrammaticLvievv.4

trating the manner in which the lead strip is4 supported in its passbetweenjithe press, and the drier. l Y 'Y l.

Fig. 3, is .alsecti'onall detail illustrating the arrangementof the loose guide sheave for the carrier ropes at the top guide roll of the pressf f,

Fig. 4 is a sectional detail illustrating Vthe manner in which Ythe carrier ropes enga-ge the lead stripat a drier'roll. i L y Fig..5 is aperspective detail illustrating the manner in'which the leadstrip is .guided into the bite ofthe carrier ropes.

paper making machineis represented as coin-V ing from an intermediate set guide roll 14 and carrying upon it web Aor a lead. strip 16 thereof'. Above thef upper pass ofthe press lroll-felt is a, second press rollfelt l8'runnin`g around guide rollsk 15y and between' the endi press rolls 20-and 20a'. The paperweb, or

the lead strip thereof, is transferred 4from the f press roll felt 10 The moving web of wardly in'contact with the upper press roll therefrom land guided to pass raround and over a rollerf28 and thence to thek baby rol-1 30 of the drier andy from y of press 'rollsy HODShOwn of the press and passing aroundav the paper of guiding the paperfsheet, l it will belobserved thatl the sheet is reversedA with-relation to the pressrollfelts,the surface of the papersheet in contactwiththe, Y Y

being uppermost while the .1 surface not in contact with the press roll felt v 10 is in contact with the pressrollfeltlS.

paper then passes 'up-Y v As here shown, the press rollfelt 10 of the', Y i0lv pair of superposedv a rolls 20 and 20a.. The lead` strip. i is removed from the'felt 10 and moved up-J PlSSIlg lit over the, guide rolls 22 and-24 at S9 verging relation with the baby roll to the series of large drying rolls 32, of which but one is here shown.

. The drier is provided with a pair of carrier ropes which are disposed in grooves 34, Fig. 4, at one side of the rolls thereof and are passed between and about said rolls and are adapted to engage the lead strip andi carry it automatically through the drier and about the drying rolls thereof. At the drier,` the carrier ropes lmay be arranged about as shown ir'i-tl'ie rWilliam Sheehan reissue Patent No. 13,925, dated June 8, 1915. In accordance with this invention, I extend the carrier ropes to the press and cause the lead stripto be engaged by the carrier ropes at the press and to be carried over the pass between the press and the drier by matically through the drier by v the ropes. To this end, a peripherally grooved idler sheave or pulley 36 is disposed at one endy of the roll 28 of the press and is j ournalledv loosely on the axle 38 of said roll. The inner'carrier rope 40 is passed downwardly and over a suitablysupported sheave 42 which is disposed above the pulley 36. Said rope is then passed downwardly over an idler sheave 44 which is disposed between the roll 28 and the upper press roll a and at one sidevof the path of movement of ther paper sheet between said pressroll 20a and the roll 28. The inner carrier rope thence is passed upwardly and about the idler pulley 36V to lie' in the groove; thereof adjacent the roll 28. The rope is then passed over the Y baby drierk 30 and,` thence about and between the drying drier in the usual manner. The outer carrier rope 46 is passed downwardly at the front end of the drier and about an idler sheave48 and thence in an upward direction to the press and about idler sheaves 50 and 52 thereof andv and about an idler sheave 54v which is disposed adjacent the idler sheave 44y downwardly for the inner carrier rope 40. The outer carrler rope is thence passed upwardly in conthe inner carrier ,rope and over the idler pulleyl 36 to lie beside the inner carrier rope in the outside of the groove. The outer rope 46 is thence passed in parallel relation and at as the rope 40 to the baby drier 30 and-about the baby drier and thence to the first drying roll 32 and thence in the usual manner about and between the drying rolls of the drier.

The carrier ropes 40 and 46 are adapted to be separated to provide an opening between them for the lead strip as they pass about their respective sheaves 44 and 54 and toiconverge, thus to grip the lead strip between them, as they pass onto the idler pulley 36 as illustrated inFig. 5. Y

p The lead strip 16 is detached from the surface of the' upper press rollv 20a by means of opposed air blasts provided by the nozzles 56'and 58 which nozzles aresupplied by air fromthe air pipe 60. The supply of air to the ropes and thence auto-v rolls 32 of the' the same speed of movement both nozzles is controlled by the valve 62 in said pipe. The opposed air blasts are arranged in general as set forth in the Charles E. Pope Patentl No. 1,279,756, dated September 24, 1918. Said nozzles 56 and 58 are directed toward each otherand are adapted to direct opposed air blasts to impinge upon the roll 20a and pass under the lead stri whereby to detach it from the press rolli The nozzles are also inclined forwardlyin the direction of Vmovement of the lead'strip between the upper press roll and the guide rol'l128f1for the purpose of guiding the lead strip and supporting it in its movement t0 `the roll 28 and also for guiding the lead strip into the bite of the carrier ropes. |The nozzle 58, which is disposed on 'the side of the lead strip; opposite the carrier ropes, is ar ranged lto provide a stronger air blast than the nozzle 56 Vand to this endfthe nozzle 56 is provided with a valve 64 by which the air supply thereof can be throttled to weaken the air blast over that provided by the other nozzle. The stronger air blast from the nozzle 58 is adapted tol impinge upon the lead strip as it passes upward from the press roll 20ct and to deflect itlaterally and cause it to enter the opening between the carrier ropes in their pass to the idler pulley 36, thus to cause the lead-strip to be positioned under the innerrope 140 and over theouter rope 46 as shown in Fig. 5. The Ylead strip is thus engagedbyV the ropes and'is carried about the guide roll 28 and automatically over the pass between e the press and the drier andabout the baby drier 3()k and thence throughv the drier andf about therollers thereof. v f

The broad idea of deflecting the lead stripA laterally into the carrier ropes is disclosed inthe copendingapplication of Roy V. llVel-v den Serial No. 197 ,955, filed .lune 25, 1927, which eventuated into Patent No. 1,676,305, dated July 10,1928. The present inventionV is intended as an improvement on the invention setforthin said application inthat in this invention, the lead strip is passed into thecarrier ropes at the press. instead of at the drier. e

The term rope as used in the claims is,- intended to include bands andthe equivalent which operate inthe manner hereinset forth.

We claim:

1. The method of carrying the paper web of a paper making machine away from a sup= porting elementtherefor whici consists in providing a pair of travelling carrier members disposed side by side and spaced apart adjacent the supporting element and direct-V ing opposed blasts of air onto the supporting element on opposite edges ofl the `paper web and in a direction inclined toward 2. The method of carrying the paper web of a paper making machine away from a supporting element therefor which consists in providing a. pair of travellingcarrier memto be detached from the supporting roll and pass into the carrier members, and having one of the blasts of air stronger than the other blast so that the paper web is deflectedlaterally toward said carrier members.

8. In a paper making machine, the combinatlon of a press, a drier, a carrier device eX- tended between the press and the'V drier ar-r ranged toengage the paper web and carry v 1t between the press and the drier, and means Y to introduce the paper web to the engagement of said carrier device at the press, including Y means to direct opposed air blast-s against .the

opposite edges of the paper Vweb in a direction which is inclined to the line of move-y ment of the paper web and is toward said carrier device, whereby to carry the web to said carrier device.

4. In a paper making machine', the combination of a press, a drier, a pair'of conjointlyoperable carrier ropes extended from the press to the drier and about and between the drying rolls of the drier,vsaid ropes arranged to engage the paper web and carry it from the press to vand through the drier, and means located at the press arranged to guide the paper web into the engagement of said ropes, including means to direct opposed air blasts against the opposite edges of the paper web in a direction which is inclined to the line of movement of the paper web and is toward said carrier ropes, whereby to carry the web into the engagement of said ropes.

5; In a paper making machine, the combination of a supporting element for the paper web, a pair of cooperating carrier elements arranged to engage the paper web and carry it away from saidV supporting element and means providing opposed .air blasts directed onto said supporting elementy and the paper web thereon to detach the paper webfrom said supporting element, said air blasts also being directed generally in the direction of said carrier elements to guidel the detached paper web into the engagement of said carrier elements.

Y 6; Ina paper making machine, the cornbination of a supporting 'element for the paper web, a pair of cooperating carrier elements arranged toerigage the paper web and carry it away rom'said supporting element and means providing opposed air blasts direc-ted onto said supportingv element, and the paper web thereon to detach the paper web from said supporting element, said air pair adjacent the press roll and extended tothe drier to carry the paper web from thepr'e'ss blasts also beingydirected generally in the direction of said carrier elements to guide the detached paper web into the engagement of said carrier element, one of said air blasts being stronger 4than the Vother air blast whereby to guide the l detached paper 'web laterally toward said carrier elements. j

7. In a paper making machine, the combination of a press having a press roll, a drier, a of cooperating carrier elements located to the drier, and means providing opposed air blasts directed onto the press'roll'on op# posite edges of the paper web thereon to dev` tach the'paper web from' the press rollV and f i gui de it into the engagement of said carrier elements. y Y A S. In a ,paper making machine, the combination of a press having a press roll, a drier, a pair of cooperating carrier elements located adjacent the press roll and extended to the drier to carry the paper4 web from the press posed airblasts directed onto'thepress roll to the drier andmeans providing op- -l on opposite vedges of'thefpaper web thereon f to detach the paper web 'from the press roll andfguide it into the engagement of said carrier elements, one of said opposed `air blasts being strongerth'an theV other air blast whereby to deiect the detachedpaper web (laterally into the engagement offthe Carrier elements. p

' 9, In a paper makingmachineythe combination of press havmg a press roll, a'l

pair of cooperatingV carrier elements disposed adjacent said press roll and extended therefrom to the drier to engage and carry i the paper webffromthe press to the drier,v yand means fto direct opposed blasts of air onto said roll on lopposite edges of said pa perl web to detach it from said press roll,

Ysaid meansbeing also arranged to direct the opposed air blasts at the same time for-'- wardly in the direction of'movement of the' i'io paper web wherebyto guide the Vdetached paper web into the engagement of said carrier elements, said air `blast directing means:

also havingV provision for providing a stronger air blast on the side of the'paper web opposite said carrier elements whereby 1 to move the detached paper web laterally toward said carrierl elements.

10. yIna paper making machine, a press having a pressy roll felt on which the paper web is carried, a pair of superposed press rolls, paper web reversing means disposed between the paper'v web and rolls to reverse the web and cause it to pass reversed bevtween said press rolls, a drier adapted to receive'the paper web from the press, a pair of cooperating carrier elementsv disposedadjacent the upper press roll and extended from the press to and through thedrier and arranged to carry the paper web fromthe press to the drier and about the drying rolls thereof, andy means to direct opposed air blasts onto the upper press roll on opposite sides of the paper Web thereon to detach the web from said upper press roll,` said means also arranged to direct said opposed air blasts generally along the line of movement of the paper Web to guide the paper web into the engagement of said carrier elements.

111. In a paper making machine, a press having a press roll felt on which the paper webl is carried, a pair of superposed press rolls, paper web reversing means disposed between the paper Web and rolls to reverse the` web and cause it to pass reversed between said press rolls, a drier adapted to receive the paper web from the press, a pair of cooperating carrier elements disposed ad-k jacent the upper press roll and extended from the press to and through the drier and arranged to carry the paper web from the press to the drier and about the drying rolls thereof, and means to direct opposed air blasts onto the upper press roll on'opposite sides of the paper web thereon, to detach the web from said paper press roll, said means also arranged to direct said opposed air blasts generally along the line of movement of the paper web to guide the paper into the engagement of said carrier elements, said means also having provision for providing a stronger blast of air onto the paper web on the side thereof opposite said carrier elements and directed towardsy them whereby to deflect the paper web laterally toward said carrier elements.

In testimony whereof, We have signed our names to this specification.V

HERVEY G. CRAM.

ROY V. WELDON.

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