US1911310A - Wire faced roll for paper machines - Google Patents

Description

May 30, 1933. c. l.. ELLIS 1,911,310

, WIRE FACED ROLL -FOR PAPER MACHINES Filed Dec. 3. 1932 2 Sheets-Sheet l' May 30 1933 c. l.. ELLIS `1,911,310

WIRE FACED ROLL FOR PAPER MACHINES Filed Deo. C27,v 1932 2 Sheets-Sheetv 2 v Patented May 30, 1933 UNITED STATESy PATENT OFFICE y CHARLES L. ELLIS, BRADFORD HILLS, PENNSYLVANIA, ASSIGNOR T IJOWNING- TOWN MANUFACTURING COMPANY, OF DOWNINGTOWN, PENNSYLVANIA., A GOB- PORATION OF PENNSYLVANIA WIRE FACED-ROLL FOR PAPER MACHINES Application led December 3, 1932. Serial N'o'. Y($415,611.

This invention relates to screen faced rollsv for paper machinerygand more particularly to a construction in such rolls preventing sli ping of the screen facing.

lcreen faced rolls of paper machinery as ordinarily constructed comprise a skeletonic core about which a winding wire is wrapped. This winding wire forms a direct support for either the facing screen wire of the roll or the backing screen Wire of the roll, depending upon whether one or more layers of screen are employed on the roll. In the ordinary constructions of such rolls, the winding wire comprises a smooth round wire which in the completed roll provides a relativel which the screen 1s mounted. ,i

In operation of the rolls, the screen often slips circumferentially upon the roll. At

times, only a portion'of the screen will slip,

so that there is an actual twist in the screen cover, and at other timesthe entire screen slips. Where the entire screen is slipping, due to the fact that the winding wire 1s spirall wound upon the core, the screen will o en have in addition to its circumferential movement an endwise movement,

creeping of the screen surface is eliminated.

A further object of the invention is the provision of a method whereby the roughenin of the winding wire at its outer surface ta es place at application of the winding wire to the roll. In this connection, it may be pointed out that assuming that it is desirable to provide a roughened surface upon the outer face of the wire, this cannot be done by roughenin the Wire prior to a pli# cation to the roll, or the reason that i the wire is Toughened on only one surface, it

smooth surface upon` will rotate upon its own axis in the course of winding, so that the Toughened surface will not be outermost.

These and other objects I accomplish by the construction shown in the accompanying drawings, wherein, for the purpose of illustration, I have shown a preferred embodiment of my inventionand wherein:

Figure L is a fragmentary perspective View of a screen faced paper machine roll, partially broken away to illustrate the method of constructing the same.

Fig. 2 is an enlarged perspective view shwing the winding wire applied to the ro Fig. 3 is an enlarged detail view showin an elevation of a fragment of the applic winding wire with the screen in posltion thereon; and

Fig. 4 is a fragmentary detail view illustrating the method of providing for roughening of the outer surface of the winding wire.

Referring now more particularly to the drawings, the numeral 10 generally designates a core of screen [faced paper machine roll, which includes a shaft 11 having mounted thereon a luralit of spiders 12 having aligned notc es 13 1n their peripheral ed es, and end s iders 14 which mount the en s of longitu inally extending rods 15 which in their passage over the spiders 12 engage in the notches 13 thereof. About this skeletonic core, a winding wire 16 is spirally wound, this winding wire forming the supportng surface for a screen wire cover 1 In accordance with my invention, the outer face of the winding wire, or that face thereof which is outermost when the wire is applied to the roll, is notched or Toughened as indicated at 18, to form lugs inter-engaging in the meshes of the wire, so that 'the wire is heldagainst either circumferential or longitudinal movement. For reasons hereinbefore stated, this roughening should be conned to the outer faces of the Wire. This I accomplish by formin the roughness as the Winding wire is applied to the roll. When the winding wire is applied. it is first anchored to an end spider as indicated atl 19 in` Figure 1. The core'is then rotated While the Wire is held under tension and at a slight angle so that the Wire is spirally Wound upon the roll. The Wire in its engagement with the roll is guided by a knurling roller 20, With the result that as it is laid against the roll, the outer face thereof is roughened Without any chance of this roughened surface being displaced fromy its proper position.

In employing a structure of this character, it is found that not only is the slipping of the screen surface eliminated, but likewise it is possible to apply the screen much more tightly to the surface of the roll than has hitherto been possible, so that the roll surface is much firmer than in rolls of the ordinary construction. At the,same time these results are accomplished Without either increasing the time or cost of the usual process of applying the Winding Wire. Both the construction and'method are adaptable for use in producing cylinder rolls, extractor rolls, dandy rolls and the like.

I claim: v Y

1. A screen faced roll for paper machinery comprising a winding wire having a roughened exposed surface, and a screen facing stretched over the winding Wire, the roughnesses 'of the Winding Wire inter-engaging lwith the screen to prevent circumferential or longitudinal `movement thereof.

2. In 4a screen faced roll for paper Vmachines, a skeletonic core, winding wire coiled vthereabout and having its outer faceroughened, and a screen facingtightly embraclng the Wire wound core.

3. In a screen faced roll for paper machines, a skeletonic core, a Winding wire coiled thereabout and having its outer face vonly roughened, and a screen facing tightly embracing the wire Wound core.

'4.l The method of producing screen faced rolls for paper machines, comprising, providing a suitablel core, coiling a wire about the core while guiding the same to the core over a member roughening that face of the wire which is outermost in the completed roll, and then applying the screen facing to the wire wound core.

5. The method of producing screen faced rolls for paper machines, comprising, pro-Y viding a suitable coreiicoiling a wire about ,the core, While rougheningthat face of the wire which is outermost in the com leted roll, and then applying the screen acing to the wire wound core. v

l6. In a screen faced roll for paper machines, a Winding wire, and a screen facing having portions interlocking with said wire preventing longitudinal or circumferential movement of the screen facing.

CHARLES L. ELLIS.

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