US1820338A - Marking roll - Google Patents

Description

Ag. 25, 1931. c. E. YoUNGcHlLD Er AL 1,820,338

MARKING ROLL Filed April 1'7 1950 Y s the paper machine Y ing'roll's with f Vrllhis invention relatesv rions construe' of sot'rubbe-'r which are in turn madeflfast Patented Aug. 25, A1931 I CASPER E. YOUNGGHILDAND JEANZK; vANAmrrmfor :YoUNGcHImn 'or Nmmosn, Wisconsin,

rom nnwfnmis, man zronnw.

Ass-ronces v@ro .Nnmoosn-Enwnmjs #Barmnarmrnenomzm "t q f @Application iea .Aprn .'12,

to afmarking roll and more partifcularly,y to such amdevicerto be usedin conjunction 'with a-,paperlmaking machine L in order ftofinrpress design Lon fthe paper'as iitm'oves:therethroughEy i v4Rollsy of 'this type are generally located #in n adj acentthe jpress or' drv',- which they cooperate in mare ingrv the paper Web as'itjpasses thereover.`

l, lnpracticethese marking rol-ls' assume vatioi'isf'and *oftenl comprise a metal roll having metal markingplates or types'secured thereto', the marking plates be` Vingcoveredvvith aiabric Wrapping to preventthel same V'from 'cutting the paper.' o Other` designs'of such rolls includemetal rolls having ru ber :marking surfaces either securedzdirectly thereto orto` endless bands to said metal'rolls.v` o o 2 A "Manyf ycommerczial `(il'isadvantages arise from the uselofthesefforms ofrolls, particu'-l larly With relation tothe life [of the r` `)lls,"`thev diculty of changing p of the rollsand of assembling andi' dismantlingthe rolls vvonrtheir supporting shaft; and the original andI replacement cost ofthe rolls, For instance; 'with regard to',V the vfirst ineni tioned type'of marking ro1l,fit is necessaryV toy Wrap or@l markingzsurecpes' ofthe'emefwith fabric. which vvears ,easily and, l as "alf result,

mistbe frequeintlyl replaced. 'This operation,

Y requires 'considerable time, and'alsoinvolves a serious eXp'ens ing ofthe markinfr Y; pensive. and has@ ,o A l Vpressions-:jon. paper,y especially,` in paper mak efzzy", u, foii'theother 'iemi",-wirh fous having-mb.-

,portingl roll,

or 'renevvingfthe design f :layer and'its fabric backing Vrubber whichy isy shov'vn'a's engrav'ed...

193e. [seri-Laino. alsof Y v up of a plurality `of alternate layers ,dfhar'd` rubber and fabric, the outer surface ofthe,

y emergingofhara rubber .having a design o incorporated or engraved iTh'e vari-` ons layers are removablyisecored together `so thatlit; is possible 'to strip the laye'rsf'frcm l one another toexpose thevv successive hardfrubQ-f p surfacesvvhich can'thenbejeng'raved to y form nevv marking s'ur'aces.,/l

bel*

Csleeve is made Awith -abore of 'larger diameterV than its supporting roll or 'shaft ,which lpro:F videsfor 'a ready removal of the sleeve from and a positioning of the sleeve 'o'n the supj 'It,1s,faccordinglv7 any (,)lzjectv ci? this invention to` provide "a [marking sleeve which can.

,easily mounted on v be quicklyand moved from-a supportingjrol'l shaft. f

r The marking iid " It isaiurther object ofthis inventionto i l provideI a .marking roll compris'ingak markingsleeve .and supporting roll or shaft' 'there-f for having .a'much smallerr diamete'rth'an the diameter of. the boreof fthe marking sleeve. v

Itis provide amarking roll vvliereinthegdesign of ther 'rollcan'be renewedorreplaced" simple, ineXpensivc operation'.y Af 1 a vfurther object oftliis invention to lt yis- 'a further fob'ect of fthis provide a marking sleeve havinga plurality rarirsfubber'seraratee offlayelffofliarden bvlayersvofjlieavy abrio, `the various `layers lbeing v.removable to eXpose the successive hard i-ubberlayers;

t' is'invention will become apparent ed oon-g, r, o f `Figurel l; isja 4fragmentary, longitudinal' sectional view through the marking *sleevevr of this invention. j f

Figure 2 is a cross section of the 'sleeve of ,l

FigureL'` l i VFiguref is a vievv similar tol Figure'l showing the sleeve A,after the outer 4engfraved i 'have'been?vv rethev l second f layer of hard moved` 'to' expose y Other and further `85 Y novwfto t edrawings'whichdis` erred embodiment of four' invern Figure 4 is a front elevation of the marking sleeve mounted on its supporting roll, with parts shown in section.

On the drawings:

The marking sleeve of this invention comn prises a hollow cylindrical body l formed of a plurality of alternate layers of rubber and heavy fabric secured together. The innermost or supporting layer 2 is composed of lnedium, hard, tough rubber. This layer is surrounded by several thicknesses of heavy fabric or duck 3, the outer surface of which is provided with a friction coating as at 4. A layer 5 of hard rubber or engraving gum of suitable thickness is vulcanized to the friction coated fabric 3. Over this layer of rubber or gum is a second layer 6 of friction coated fabric to which is vulcanized a final layer 7 of hard rubber or engraving gum forming the exterior surface of the sleeve.

The ends of all but the inner layer 2 are cut away as at 8for lthe receptionofhard rubber caps 9 which protect the fabric layers from the action of steam and heat when the sleeve is mounted for operation in the paper machine. These caps are made of such width as not to interfere with the design on the marking surface of the sleeve or the deckle size of the paper sheets.

A sleeve constructed as above when desired to be employed in a marking roll is engraved with a design 10 by mounting the sleeve on a support and cutting away portions of the outer hard rubber layer 7 to form said design. In engraving this layer, the design is cut therein the full depth of the layer as shown in Figure 3 and the parts so cut out are pulled away or stripped from the fabric backing layer 6. In order to readily permit this stripping action without tearing the rubber layer, the vulcanization of said layer to its fabric backing is only carried out to such an extent as to produce a firm adhesion between the two layers.

The engraved marking sleeve is mounted in the paper machine on a supporting press roll l1 (Figure 4) of smaller diameter than the bore of the sleeve, so that a clearance 12 exists between the press roll and sleeve. The supporting press roll l1 is located in the paper machine' in a position to cooperate with the drying cylinder or a press or similar roll so as to be moved thereby in marking the paper web. Preferably a guide bar carrying a plurality of guides is located on the supportsy for the roll l1 whereb f to position a number of marking sleeves on the width of said supporting press roll.

The operation of the marking sleeve, as stated above, is effected by positioning the sleeve and its supporting roll adjacent tov a roll over which the paper to be ,marked moves, preferably, a drying cylinder or press roll. The friction set up between the marking sleeve and the cooperating roll causes the supporting press roll and sleeve to rotate as a unit similar to the movement of a loose belt of large diameter over a rotating pulley of less diameter. The web of paper coming in contact with the rotating sleeve is impressed with the design carried thereby.

In practice it will be found that the weight of the press roll supported at its ends will cause a slight springing of the roll so that the marking sleeve on the roll will be slightly depressed near its center, thus producing a non-uniform mark on the paper web. This defect can be overcome by crowning the supporting press roll, whereupon the marking sleeve will conform to the contour of said roll.

It will be apparent that the frictional contact between the surface of the marking sleeve and the roll with which it cooperates will after a certain time cause a wearing away ofthe design on the When wear of the design has progressed to such an extent that the mark on the paper web no longer assumes a clear cut impression, it is necessary to renew the design on said sleeve. In the rolls formerly employed this meant either the replacement of the marking roll by another roll. the stripping of the vmarking surface of the roll from the roll proper, or the re-engraving of the surface of the' worn roll, which acts entailed a tedious, expensive operation. The marking face of our roll on the other hand, is renewed by a comparatively simple procedure.

The marking sleeve is slid off its supporting press roll and mounted on a mandrel or similar support. The engraved rubber surface 7 and its layer of fabric backing or duck 6 is then stripped from the roll, thereby exposing the hard rubber layer 5. The outer marking sleeve. f

surface of this layer is then worked to clean and smooth the same and the rubber cap 9 worked down to proper' size or replaced by caps of proper height. The desired design 10a is then engraved in the layer 5, whereupon a sleeve as shown in Figure 3 results.

By forming the marking sleeve with abore diameter greater than that of the supporting press roll it is apparent that, a number of various modifications of the mounting of the sleeve in themachine may be employed. For

instance, a series of sleeves of'different design may be located on a supporting roll in posi tion to mark different widths'of paper so that various combinations of paper to suit manufacturing requirements can be made fromthe high efficiency in that it permits the renewal or replacement of its marking surface by a simple operation; can be easily and quickly mounted in and dismounted from a supporting roll and can be arranged in various ways 7 in the machine to effect different markings on the paper web. l

While we have disclosed'a preferred embodiment of our invention, itis to be understood that various changes in the structure thereof may befmade without departing from the spirit of the inventionjdisclosed. Accordingly, we do not propose to limit our invention except as necessitated by thev prior art. f We claim as our invention Y 1. A marking sleeve, comprising a hollow body having an outer layer of hard rubber with a designtherein, a backing'of heavy fabric therefor, and a second layer of hard, rubber removably secured torsaid fabric backing whereby said engraved rubber layer and its fabric backing may be stripped from the sleeve to expose said second rubber layer.

2. A marking sleeve, comprising a hollow cylindrical body having a designgthereon and composed of a plurality of laminated layers of hard engraving gum and heavy fabric removably lsecured together whereby said laminated layers may be vstripped from each other to expose the successive engraving gum surfaces, when the designin the outer of said surfaces wears out'.` n

- 3. A marking roll, comprising a supporting roll and a'A-hollow marking sleeve loosely and freely mounted thereon, saidsleeve infV mounted thereon and comprising a plurality of Vsuperimposed layersy of engraving 'gum each having a backing 4ofheavy duck, the outer layer of gum having a design thereon, and means for frictionally' engaging said sleeve'for rotating said 'sleeveand roll as a unit into contact with said paper web.

8. A marking -roll comprising a cylindrical support having thereon a laminated markingsleeve of a slightly larger borev diameter than the ,diameter of said supporting roll, the laminations ofsaid sleeve beingfsuch that the outer layer may be stripped from the sleeve to expose a different marking surface.l s

In'testimony whereof, wehave hereunto subscribed our names at Port Edwards, Wood 5 County, Wisconsin.v i n CASPER YOUNGCHILD. f

' 'JEANIQ VANATTA.4 a

JOHN W. YOUNGCHILD.jk

cluding an outer engraved layer of hard rub-` i ber, a backing of heavy duck and a secondy i y layer of hard rubber adapted vto be exposed by removal of said rfirst vhardrubber layer and heavy duck when the engraving of saidy first n rubber layer wears out.V y l 4. A marking sleeve, comprisingacyliny ,Y drical-body composed Lof alternate layers of hardrubber and heavy -duck removably secured together. i s Y y 5. A marking sleeve, comprising'an innerV supporting layer of medium 'hardrubben a layer of heavy fabric thereon, a layer of engraving gum on said fabric layer, a second K layer of heavy fabric over said gum, and an outer layer ofl engraving gum having a dev sign thereon, said outer-layers of gum` and fabric being removable upon wear of said I n design, to expose the inner layer of engraving gum.

6. A sleeve as in claim having cylindri- Acal hard rubbercaps on the ends thereof.

- r7. In a paper machine, a marking device` for apaper web, comprisinga supporting roll, a marking sleeve lloosely and freely4

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