US2666370A - Fourdrinier type machine for applying pulp insulation to wires - Google Patents

Description

B. F. BACHUS 'FOURDRINIER TYPE MACHINE FOR APPLYING Jag. 19, 1954 PULP INSULATION TO WIRES '2 Sheets-Sheet 1 Filed Aug. 20, 1948 mw E w IfIIIILrII ll I. n fllilTiiltiil I III! In, I I I l llurllull-l I I I I M/VF/V7'0f? B. 15' 5/16/9115 5y I I ATTORNEY B. F. BACHUS TYPE Jan. 19, 1954 FOURDRINIER MACHINE FOR APPLYING Filed Aug. 20, 1948 PULP INSULATION TO WIRES 2 Sheets-Sheet 2 Patented Jan. 19, 1954 viav-wazs I :E-Glaims.

6f the inclined c'ourse of t the Screensthnough which all of the pulp has been deposited thereon. A

substantial portion of the stock passes through an opening or gate 48 formed between the end of the sealing strip 39 and the roll I! so that the initial portion of the web of pulp is formed on the upwardly sloping course of the screen. At the juncture of the sloping and horizontal courses of the screen 10, the web has a thickness intermediate its initial and final thickness. Pans are mounted underneath the upper flight of the screen IE] to intercept the water draining therethrough and vertical partitions 52 divide the pans into sections or boxes, some of which may be connected by pipes 54 to vacuum pumps (not shown) to accelerate the withdrawal of water from the pulp web. In the section under the sloping course 2!) of the screen I0 and the section containing 1 the roller 11, the water is drained through the screen l0 naturally or by gravity only.

At the portion of the web 45 where it is of intermediate thickness and where it curves around the roll l1, the wires 58, which are to be pulp in-- I I sulated, are laid on the web of pulp. As shown herein, the wires 58 are guided for substantially horizontal movement tangentially onto the web of pulp at the point above the roll I! by a wire guide roll 60 rotatably mounted in the trough as and having grooves 6| therein in spaced relation to each other axially of the roller 80 to space the wires laterally across the web 45. Since it is partly immersed in the stock in the trough 35 of the flow box 28, the roller 6!] acts as a baffle and prevents the too rapid discharge of the stock onto the screen It). If desired, the guide roll may be located at a lower level to guide the wires 58 in an upwardly inclined direction tangentially onto the web 45 at a different point on the curved portion thereof.

As the liquid carrier of the stock continues to pass through the screen [0 during its forward movement in its horizontal course, pulp fibers are deposited on the web 45 and on the wires 58 to increase the thickness of the web and to cover the wires and imbed them in the web. The wires 58, arranged in parallel relation, and imbedded in the pulp web 45, are advanced with the web 45 and the screen I0 toward the couch roll l2 and at a point substantially midway of the horizontal course, the web 45 is cut or slit longitudinally between the wires 58 by jets or streams of water 62 to separate the pulp enclosed wires from each other. The cutting streams of water 62 are directed downwardly from a plurality of nozzles 6363 on a pair of water supply pipes 6464 extending above and transversely across the horizontal course 24 of the screen Ill and the cutting jets 52 from a pair of nozzles 63 are directed against the web on opposite sides of each of the wires and at predetermined spaced distances from the wire to form two slots or slits 65, which sever the pulp-enclosed wire from the rest of the web and trim the laterally extending wing portions of pulp adhering to the wire to the required size and leave strips 68 of waste pulp on the screen in between the pulp covered wires 58.

Most of the water remaining in the web 45 may be removed therefrom as the strips of pulp pass over the remaining suction boxes 52 and as they pass through a pair of pressure rolls 69, which press out some of the water and compact the pulp in the strips. The pulp insulated wires 58 are Withdrawn from the Fourdrinier screen In by a pair of driven pressure rolls l0 and may be further processed by being passed individually through rotatingpolishing members (not shown), which wrap the wing portions about the wire and compact the insulation into cylindrical or sheath form around the Wire, after which the wires may be wound on reels. The waste or intermediate strips of pulp 68 are removed from the screen 10 by a spray or shower of water directed thereagainst from a pipe H and by a doctor blade 12 engaging the screen Ii) and deposited in a pan 13.

'The thickness of the partially formed web 45 at the beginning of the horizontal course 24 of the screen or at a point above the roller ll is determined by the quantity of water passing through the sloping course 20 of screen It and through the gate 48 and may be varied by varying the rate of linear movement of the screen ill but preferably is controlled by varying the area of the sloping portion of the screen through which the stock passes. The length or longitudinal distance of the opening or gate 48 between the end of the sealing strip 39 and the roller I! may be varied by adjusting the position of the strip 39 relative to the rollers I! but preferably the length of the gate or opening 48 is controlled by a slide or movable plate 75 positioned underneath and in engagement with the inclined portion of the screen Ill. The plate 15 supports the screen at this point and is mounted for movement parallel thereto, the ends of the plate 15 being rabbeted (Fig. 4) and supported in guideways 11 formed in the side frames l8--'i3 of the apparatus. Racks 19 formed on the underneath side of the plate 15 are engaged by gears 8080 fixed to an adjusting shaft 8| which, in turn, is mounted for rotation in the side frames 18-48. The squared end 82 of the adjusting shaft 8| may be engaged by a suitablehandle 83 and rotated to advance or retract the slide 15 and thus regulate the width of the opening gate 48, and thus control the rate of passage of water therethrough and the thickness of the Web at the beginning of the horizontal course of the screen 10.

It is to, be understood that the above-described arrangements are simply illustrative of the application of the principles of the invention. Numerous other arrangements may be readily devised by those skilled in'the art which will embody the principles of the invention and fall within the spirit and scope thereof.

What is claimed is:

1. In an apparatus for applying pulp insulation to wires, an endless Fourdrinier screen mounted for advancing movement in one direction and having an upwardly sloping course and a horizontal course extending from the upper end of the sloping course, a flow box for receiving a supply of liquid pulp stock and having a discharge chute including an outflow plate, for directing said stock onto the upper portion of the sloping course and the adjacent portion of the horizontal course of said screen to form a web of pulp of progressively increasing thickness along a predetermined portion of said screen and having a thickness at the juncture of said sloping and horizontal courses intermediate that of the initial and completed portions of the web,

extendingfrom the-end of th e -sloping-course, a flow -box =for receiving a supply of-iliquidpulp stoolsand fore discharging said stock- 1 onto the sloping-and the horizontal-courses ofi said-screen web of progressively inereasing' th'icltnessalong a pregletermined pertion of said screen and having a thickness at the juncture of said sloping andrhprizontal editionsiintermediatedhat 20f th initial and completed, portions of. the web, as;

guide in said flow box 'for guiding a wire horizontally onto said web ofpulp at the juncture of aidsloping-and-horizontakcourses t saidscreen or movement Withtheweb and the horizontal area of'saidsloping -course of said screen'through which said stools passes to var-ythe thickness of the-incompleteweb-at-the-juncture of; the sloping nd-horizontaleoursesof said-screen;

I -tion, to wiresi an endless Fourdrinier -sereen mounted foiyadvancinggnovement and having an upwardly sloping course and a horizontal course ..,..exte' di s from he-i ric d of t e sloping 'course;a flow box for receiving'a supply-of liquid pulp stock: and having a trough portion disposed above and adjacent the sloping course of said screen for directing the discharge of said stock onto the upper portion of a sloping course and the adjacent portion of the horizontal. course of said screen to form a web of pulp of progressively increasing thickness along a predetermined portion of said screen whereby the thickness of the web at the juncture of said sloping and horizontal courses is intermediate that of the initial and completed portions of the Web, a flexible sealing strip extending from the trough portion of said flow box in engagement with the sloping course 7 of said screen, means for urging said sealing strip into engagement with said screen, means for directing a spray of water onto said sealing strip and said screen where they meet to prevent the in the trough portion of said flow box for guiding a wire longitudinally onto said web of pulp at the juncture of said sloping and horizontal courses of said screen for movement with said web and said horizontal course of said screen.

4. In an apparatus for applying pulp insulation to wires, an endless Fourdrinier screen mounted for advancing movement and having an upwardly inclined portion and a horizontal portion forming a dihedral angle, a flow box for rewhich in thickness is only partially formed at the apex of said inclined and horizontal portions of said screen, mean forming a seal between the discharge chute and the inclined portion of said screen to prevent the stock from flowing down said inclined portion of said screen, roller means in said flow box for guiding a wire to be pulp inupwardly sloping conrse-and -'ahorizontal course:

-'- adiacent:thejuncture' of said courses to torm a! 5 course of the-screen; and-means for varying the" h 1 3 -In'- an; apparatusfor applying a pulp insula 5.. r. ar nss hea a c idii;

s dsc e hrousha h chz o e eithei quid n 'si g zmarp ssjcqmpri ing;aiplate en a i le eii a din l ed ,--portionf Qffifl iapparatusz r -.a p pulninsuiai n t9. .:w s.,.1: n:. end ess :FQurdr nier'rscreen oiintedi r dvanc n mevem t in ne ida el erem a srfcrsupp rti said-scr n: t de upper-horizontal portion andaninedp endingsdownwardly-iron; one ,ntalxportion and; including a n roller terming a; rounding; surface at v A v cture ofisaid:Qortionsraflow iboxefojr re- -ceivingpa-supply of. pulp stock and havingza-l ohute ortion boveandgadjacent the inclinedsportion (If- 17116 ;sc;reen ion-directing the, stock :onto. the

timed and horizontal rportions of said screen M w along a predetermined portion of said n and having. a thickness at the curved; por- 5 on; rormed by saidsupporting roller. intermediate that of the initialiandlrcompletediportions of ,thewe b, means forming aiseal between saidchute the flow of stock downwardly on; said I-inclined portion; of ;-th.e screen,- ideckle membersengaging 1;; the ;,edge portions of; the screen for limiting-the lateral flow ot-sto .k on, said -sc-reen,g rcller means mounted in said chute and for guiding wires to be pulp insulated tangentially onto the curved portion of said web for movement with said web and said horizontal portion of Said screen, and

means for varying the length plate parallel to and longitudinally of said inclined portion of said screen.

6. An apparatus for applying pulp insulation to wires comprising a screen mounted for moveobliquely disposed relative gressively increasing thickness along a portion of between the outflow plate and the screen to pre second courses of said screen for movement with 7 to wires comprising a Fourdrinier screen mounted for movement through a first substantially straight course and a second substantially straight course obliquely disposed relative to each other and having a common juncture therebetween, pulp guide means including an outflow plate disposed in close proximity to said first course of the screen for receiving a supply of a. liquid pulp stock from a source of supply and directing said stock onto the first course of the screen for movement with said screen through said first and said second courses to form a web of pulp of a predetermined final thickness and of progressively increasing thickness along a portion of said screen and having a thickness at the juncture of said first and said second courses intermediate that of th initial and the completed portions of the web, means forming a seal between the outflow plate and the screen to prevent the flow of pulp stock thereoetween, wire guide means disposed at a level above said outflow plate for guiding a wire substantially parallel to said second course of said screen and onto the web of pulp at the juncture of said first and said second courses of said screen for movement with said web, and means for varying the area of said first course through which the liquid of said liquid pulp stock passes to vary the thickneSs of the web at the juncture of the first and the second courses of said screen.

8. An apparatus for applying pulp insulation to wires comprising an endless Fourdrinier screen mounted for advancing movement and having an upwardly sloping course and a substantially horizontal course extending from the upper end of the sloping course, means for receiving a supply of liquid pulp stock, said pulp receiving means having a discharge portion including an outflow plate disposed above said upwardly sloping course of said screen for directing said stock onto the upper portion of the sloping course for movement with the screen through the sloping and the substantially horizontal courses of said screen to form a web of progressively increasing thickness along a predetermined portion of said screen and having a thickness at one end of said substantially horizontal course intermediate the initial and completed portions of the web, and wire guide means disposed at a level above said outflow plate for guiding a wire substantially horizontally onto the web of pulp at said one end or said horizontal course of the screen.

BENSON F. BACHUS.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 921,674 Clark 1 May 18, 1909 1,073,273 Miller Sept. 16, 1913 1,814,268 Sweeney July 14, 1931 1,870,267 Stone et al Aug. 9, 1932 1,881,914 Parker Oct. 11, 1932 1,973,722 Nash Sept. 18, 1934 2,154,719 Berry Apr. 18 1939 2,286,807 Johannessen June 16, 1942 2,416,394 Krogel Feb. 25, 1947 FOREIGN PATENTS Number Country Date 16,546 Great Britain of 1890

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