US2615374A - Slice assembly for papermaking machines - Google Patents

Description

Oct. 28, 1952 B. A. MALKIN 2,515,374

SLICE ASSEMBLY FOR PAPERMAKING MACHINES Filed Oct 4. 1943 7 Sheets-Sheet 1 INYENTOR B.A.MALKIN ATTORNEYS B. A. MALKI N SLICE ASSEMBLY FOR PAPERMAKING Oct. 28, 1952 Filed Oct. 4, 1948 7 She efes-Sheefc 2 ATTORNE M R m $1M $7M Oct. 28, 1952 B. A. MALKlN 2,615,374

SLICE ASSEMBLY F OR PAPEIRMAKING MACHINES Filed Oct. 4, 1948 7 Sheets-Sheet 3 i. ii a H V w/ I r INVENTOR BAMALKm ATTORNEY Filed Oct. 4, 1948 7 Sheets-SheetA Oct. 28, 1952 B. A. MALKIN 2,615,374

SLICE ASSEMBLY FOR PAPERMAKING MACHINES FIG-4 I NV E N TOR MALKsN ATTOR EYS Oct. 28, 1952 B. A. MALKIN 2,615,374

SLICE ASSEMBLY FOR PAPERMAKING MACHINES Filed Oct. 4, 1948 7 Sheets-Sheet 5 INVE NTOR B.A.MALK$N ATTORN EYS Oct. 28, 1952 MAL-Km 2,615,374

SLICE ASSEMBLY FOR PAPERMAKING MACHINES I NYE NTO R 5.A.MALKIN ATTORNEYS Oct. 28, 1952 B. A. MALKIN 2,615,374

SLICE ASSEMBLY FOR FAPERMAKING MACHINES Filed Oct. 4, 1948 7 Sheets-Sheet 7 \NVE NTOR BLAMALKIN ATTORN EYS Patented Oct. '28, 1952 SLICE ASSEMBLY FOR PAPERMAKING MACHINES Bernard A. Malkin, Lachine, Quebec, Canada, as-

signor to Dominion Engineering Works Limited, Lachine, Quebec, Canada Application October 4,1948, Serial No. 52,642

19 Claims. 1

This invention relates to a slice assembly for paper making machines .and the object is to provide a generally improved assembly in which the slice plate is adjustably mounted in a novel manner so that it has a wide range of adjustment both with respect to its elevation and with respect to its position along the length of the fourdrinier wire or other sheet forming element.

According to this invention the slice plate is secured to the lower portion of a slice plate carrier arranged between and adjustably supported by the pondplates of the slice." The upper portion of the slice plate carrier is supported from I the pond plates by supporting means adjustable to raise and lower the slice plate carrier and designed to provide a pivotal axis about which the slice plate carrier is swingable to shift the slice plate to different positions of adjustment along the length of the fourdrinier wire or other sheet forming element. The lower portion of the slice .plate carrier is also supported from the pond plates by supporting means adjustable to swing the slice plate carrier about said axis.

Several preferred embodiments of the. inven -ltion are shown in the accompanying drawings, in

assembly shown in Fig. 4.

Fig. 6 is a vertical sectional view taken substantially along the section line 66 of Fig. 4.

Fig. '7 is a vertical sectional view taken substantially along the section line 7-1 of Fig. 4.

Fig. 8 is a detail View of one of the spring loaded studs forming part'of the assembly shown inthe preceding figures.

The slice assembly shown in Figs. 1 to 3 inclusive, includes an apron 5 over which the stock flows onto the fourdrinier wire 6 at the breast roll I. This apron is arranged between vertical pond plates 8 so that its delivery edge 9 constitutes the lower lip of the slice. The upper lip of the slice is formed by the lower edge Ill of a flexible slice plate II which is mounted so' that it may be raised and lowered and may also be swung about a horizontal axis to different positions of adjustment along the length of the fourdrinier wire.

Slice plate II is secured to the lower portion of a slice plate carrier [2 which preferablycomprises a hollow frame structure adjustably supported by and between the'pond plates li. A pair, of aligned shafts I3 are rotatablyl-supported in the upper portion of slice plate carrier l2 with their inner ends coupled to shafts l lof a worm gear reduction unit It which is driven by a shaft l6 equipped with a hand wheel H. The outer ends of shafts, 13 are coupledto pinion shafts l8 journalled in gear casings 19 secured to the sides of carrier l2 adjacent the -upper front corners of said carrier. pinion 2D is fixed to each pinion shaft l8 and meshes witha larger pinion 2| carried by a shaft 22 also journalled in gear casing I9.- The outer portion of each pinion shaft 22 is formedto provide an eccentric stub shaft 23 journalledin a bearing24 carried by a bracket 25 secured to the front edge of one of the pond plates 8. The eccentric stub shafts 23 provide a horizontal pivotal axis about which the carrier l2 and slice plate H may be swung to shift the slice plate to differentpositions of adjustment along the length ofthe fourdrinier wires. .These eccentric stub shafts 23-also serve to raise and lower the carrier l2 and slice plate H with'reference to thefourdrinier wire fi when said eccentrics are rotated in their bearings 24- by operation of the hand Wheel I1. I

A pair of aligned shafts 21 are rotata-blygsupported in the lower, portion of carrier l2 with their inner ends coupled to shafts 2.8 of a worm gearreductiongunit29 which is operated bya shaft 30 equipped with a hand wheel 3L The outer end of each shaft 21 is coupled to, a pinion shaft 32 journalled in a gear casing 33- secured to one. side of carrier [2. Pinionshaft 32 carries 1 a small pinion 34 meshing with a relatively large ,casing 33. meshing with a larger pinion 38v carriedby a pinion 35 fixed to a shaft 36 journalled in gear Shaft 36 carries a small pinion 31 pinion shaft 39' also journalled in gear casing 33. Shaft 39 also carries an eccentric stub shaft til-fitted in a bearing 4| provided at .one end of a tie rod 42 having its other end pivotally connected to the outer side of one of the pond plates 8 by trunnion 43 and tie rod bearing 43a.

As here shown each tie rod 42 includes a turn buckle arrangement 43b which enablesthe tie rod to be shortened or lengthened to' vary the v distance between the pivotal axis All and the A relatively small I Washer 410 bearing against nut 41.

of the fourdrinier Wire 6 this is accomplished by operating hand wheel 3| to rotate stub shafts 40 in their tie rod bearings 4| Further adjustment of the slice plate II to different positions along the length of the fourdrinier wire 6 may be obtained by varying the effective length of the tie rods 42 through the agency of the turn buckle or other length adjusting means provided for this purpose. When the carrier. l2 and slice plate are being raised and lowered by rotation of the upper eccentric stub shafts 23" in their bearings 24, the tie rods 42 function as supporting links for the lower portion of the carrier. v

As clearly shown in Fig. 3, the carrier l2 comprises a casing having a top wall 53, front and rear walls 54 and 55, side walls 56, a V-shaped bottom wall and internal wall stiffening plates 58, 59 and 60. The reduction gear units ['5 and 29 are supported, respectively, on the stiffening plates 60 and 58.

In order to ensure an efiicient water seal between the' carrier I 2 and the pond plates 8, the sides of the carrier are provided with spring loaded studs 45 (Figs. 2 and 8) extending outwardly through slots 46 in the pond plates 9 and equipped with nuts 41. Each stud 451s encircled by a loading spring 41a confined'between a washer "6 bearing against the pond plate 8 and a second 41?) and 410 are provided with opposing bosses 11d and 41c. The boss 41a is provided with stop projections ll-f which fi-t'in slots Hg in the boss 41b and are engageable with the bottom walls of said slots to limit the extent to which spring 41w .can be compressed by tightening the nut 41.

An important advantage of the slice. assembly shown in Figs. 1 to 3- incl'usive is that the driving mechanisms for the upper and lowereccentric stub shafts 23 and 40 are protected by the carrier l2 and by the reduction gear casings carried by said carrier. This arrangement also provides a very compact assembly of the carrier l2 and its adjustable supporting means.

It is preferred that the apron assembly 5 be adjustable so that it may be shifted horizontally to different positions of adjustment relative to the vertical axis of the breast roll 1 I As shown in Fig. 3, the apron assembly 5 including liner plate 49 is slotted as indicated at 50 to accommodate a stud 5| carried by a stationary casting 52 which is attached to and forms part of a stationary head box (not shown) Figs. 4 to 7 inclusive illustrate a modified slice assembly in which the mechanism for adjusting carrier [2 and slice plate H are located outside said. carrier. In this case the upper portion of carrier [2' is provided, at each side with a trunnion journalled in a bearing block 'H arranged to slide in a vertical guide 12 machined in the adjacent pond plate 8. Each bearing block H is raised and lowered by a vertically adjustable rod 13 having its lower end pivotally secured tosaid bearing block as indicated at 14'. A threaded Worm pinion I5 is screwed onto the u-pper portion of each rod 13 and'is supported on 'a suitable vhrust bearing 16 arrangedwithin the gear casing Each worm pinion l5 isdriven by a worm wheel 18 fixed to a shaft. 19 journalled in casing 11. The outer ends of shafts 19 are provided with hand wheels 80 and the inner ends of said shafts are connected together by a coupling shaft 8i.

The trunnions 19 and bearing blocks 1| provide a horizontal axis about which-carrier l2 and slice plate H may be swung to shift the slice The washers plate to different positions of adjustment along the length of the fourdrinier wire.

The mechanism shown in Figs. 4 to 7 inclusive for swinging carrier I2 about its pivotal axis comprises a pair of tie rods 84 each having one end pivoted to a bracket 85 fastened to the front of carrier I 2. 'The other end of each tie rod 84 is provided with a bearing 86 fitted on an eccen-- tric shaft extension 81 of a shaft =88 journalled in a bearing 89 carried by one of the pond plates 8.

- The eccentric shaft extensions 81 located at opposite sides of the slice are connected together by a coupling shaft 90. tends into a gear casing 9| and is provided with a worm wheel 92 which is driven by a worm 93 fixed to the lower portion of a vertical shaft 94 equipped at its upper end with a hand wheel 95. The upper portion of shaft 94 is journalled in a suitable bearing 96 (Fig. 4) carried by one of the pond plates 8. By rotating hand wheel the eccentrics 81 may be rotated in their tie. rod bearings 85 to shift. the tie rods in a direction to swing carrier 12 and slice plate Ill about-the pivotal axis aiforded by the trunnions 111.

"The tie rods'84. shown in. Figs. 4' to 7 inclusive, include turn buckles 960. by means of which the effective length .of'the tie rods. maybe. variedas and. for the purpose. previously described in connection with theitie. rods shown in Figs'..1 to 3 inclusive.

In slices. of thevtype to which this invention relates it. is customary to. provide means, for flexing the lower edge of the slice plate H and a conventional adjusting means for this purpose. is indicated at 98: in the present drawings. It: is also customary in slices of this type to provide a flow distributor behindthe' slice. plate jl l and in Fig.6 I have shown a conventional distributing roll 99 which is preferably mounted in adjustable bearings 1.90 (Fig; 5.) so that. said roll maybe adjusted forwardly and rearwardly tocompensate for forward and rearward shifting" of. the slice plate. I in the longitudinal direction of the fourdrinier wire. The distributingroll 99 may be driven by any suitable form of driving means such as that indicated at Hll in Fig. 4.

Iclaim:

1. In. a pond and slice assemblyv of the character described, a pair of: laterally spaced, vertically disposed pond plates, a, slice plate carrier arranged between said pond plates; a slice plate secured to the lower portion of said carrier, means supporting. the upper portion of saidcarrier from the: upper portion of. the. pond plates, said supporting meansv being adjustable to. raise and lower said carrier and including carrier supporting pivots affording. a horizontal axis about rier to different positions of adjustment-about said horizontal axis. I

' 2. In a pond and slice assemblyof the character described, a sheet forming element, an apron over which the stock is delivered to said forming element, vertically extending pond plates disposed at opposite sides ofsaid-apron,

One of the shafts 81 exa slice plate carrier arranged between said pond plates, a slice plate secured to the lower portion of said carrier and cooperating with the delivery edge of the apron to form the mouth of the slice, means supporting the upper portion of the carrier from the upper portion of said pond plates, said supporting means affording a horizontal axis about which the carrier is swingable to shift the slice plate to different positions of adjustment along the sheet forming element and being adjustable to raise and lower said carrier and slice plate and additional supporting means connected between the lower portion of the carrier and the pond plates and adjustable to swing the carrier about said axis,"

pivotally secured to the lower portion of one of said pond plates.

3. A pond and slice assembly as set forth in claim 2, in which the means supporting the upper portion of the slice plate carrier from the upper portion of the pond plates includes rotatable eccentrics journalled in stationary bearings carried by the pond plates and supporting said carrier.

4. A pond and slice assembly as set forth in claim 2, in which the means supporting the upper portion of the carrier from the'upper por tion of the pond plates includes pivots forming part of said carrier and journalled in bearings supported by the pond plates. 4 i

5. A pond and slice assembly as set forth in claim 2, in which the means supporting the upper portion of the carrier from the upper por-' tion of the pond plates includes pivots forming part of the carrier and fitted in vertically adjustable bearings carried by the pond plates ment along the sheet forming element. T

7. A pond and slice assembly as set forth in claim 6, including a hand operated gear reduc tion unit supported by said carrier, shafts driven by said unit and gearing through which each of said eccentrics is driven from one of said shafts.

8. A pond and slice assembly as set forth in claim 2, in which the additional supporting means supporting the lower portion of said carrier from the lower pond plates comprises link members pivotally connected to the carrier and to the pond plates, said link members being adjustable in length.

9. A pond and slice assembly asset forth inclaim 2, in which the additional supporting means supporting the lower portion of the carrier from the pond plates comprises a pair of links, means pivotally connecting one end of each link member to the carrier and means piv- Y otally connecting the remaining ends of the link members to the pond plates.

10. A pond and slice assembly as set forth in claim 9, in which the means pivotally connecting each link memberto said carrier comprises a bearing forming part of the link member and an eccentric rotatably supported in the carrier and rotatably fitted in said bearing whereby rotation of said eccentrics in'saicl bearings is effective to swing the carrier about said axis.

' 11 A pond and slice assembly according to claim 9, in which the means pivotally connecting each link memberto one of the pond plates comprises a bearing forming part of the link member and an eccentric rotatably journalled in the pond plate and rotatably fitted in said bearings so that rotation of said eccentric is effective to swing said carrier about said axis. 12. A1 pond and slice assembly as set forth in claim 2, in which the carrier and slice plate extend across the forming elements from one pond plate to the other and in which means are provided for holding the sides of the carrier in sealing engagement with the inner side surfaces of the pond plates.

I 13. In a pond and slice assembly of the character described, a pair of laterally spaced, vertically elongated pond plates, a slice plate carrier" arranged between, said pond plates, pivot shafts carried by the upper portion of theslice plate carrier and journalled in bearings carried by the upper portion of the pond plates to provide a pivotal axis about which the slice plate carrier is swingable to diiferent positions of adjustment and means for swinging said slice plate carrier to said diiferent positions of adjustment comprising adjustable link members each having plates, pivot shafts carried by the upper portion of the slice plate carrier and fitted in said bearings to provide a pivotal axis about which the slice plate carrier is swingable to different positions of adjustment and means for swinging said slice plate carrier to said different positions of adjustment comprising link members pivotally connected at one end to the lower portions of said pond plates and at the other end to the lower portion of the slice plate carrier,

the pivotal connections at corresponding. ends of said links constituting part of eccentric mechanisms'by means of which axial movement is .imparted to the links to swing the slice plate carrier about said pivotal axis.

shafts are rotatably fitted, said slide bearings working in guides carried by the upper portions of the pond plates, means for raising and lowering said guides, and slice plate carrier adjusting mechanism connected between the lower portions of the slice plate carrier and the pond plates and operable to swing the slice plate carrier to various positions of adjustment about the pivotal axis afforded by the pivot shafts and slide bearings, said slice plate carrier adjusting mechanism comprising apair of link members having corresponding ends pivotally secured to the slice plate carrier and eccentrics rotatably carried by the lower portions of the'pond plates and operatively connected to the remaining ends of said links, whereby the links are operated in response to rotation of said eccentrics to swing the slice plate carrier about the pivotal axis afforded by said pivot shafts.

16. In a pond and slice assembly of the character described, a pair of vertically disposed pond plates arranged in spaced parallel relation to 7 is swingable to various positions of adjustment,

means for rotating said stub shafts to raise or lower said pivotal axis and to effect a corresponding raising and lowering of the slice plate carrier, and slice plate carrier adjusting mechanism connected between the lower portions of the slice plate and the pond plates and operable to swing the slice plate carrier about said pivotal axis, said slice plate carrier adjusting mechanism comprising adjustable link members each having one end pivotally secured to one side of the lower portion of the slice plate carrier and the other end pivotally secured to the lower portion of one'of said pond plates.

17. In a pond and slice assembly of the character described, a pair of vertically disposed pond plates arranged in spaced parallel relation to each other, a slice plate carrier arranged between said pond plates, said carrier comprising a hollow casing having top, front, rear, bottom andside walls, a slice plate secured to the lower portion of said carrier, bearing brackets secured to the upper portions of the pond plates, gear casings secured to the upper portions of the sides of said carrier, pivot shafts journalled in said gear casings with the outer ends of said shafts projecting from the gear casings and formed to provide eccentric stub shafts journalled in said bearing brackets to provide a pivotal axis about which said carrier is swingable to various positions of adjustment, additional shafts journalled in said gear casings with the inner ends of said shafts extending into the upper portion of said carrier, said additional shafts being geared to said pivot shafts to drive the latter, shaft rotating means housed in the upper portion of said carrier in driving engagement with themner ends of said additional shaftsand carrier adjusting mechanism connected to the lower portion of said carrier and operable to swing the latter to various positions of adjustment about said pivotal axis, said carrier adjusting mechanism comprising adjustable link members each having one end pivotally secured to one side of the lower portion of the slice plate carrier and the other end pivotally secured to the lower portion of one of said pond plates.

18-. A pond and slice assembly as set forth in claim 18, in which said shaft rotating means comprises a manually operable gear reduction unit housed in the upper portion of said carrier and shafts through which power is transmitted from said gear reduction unit to the said additional shafts journalled in the gear casings.

19. In a pond and slice assembly of the character described, a pair of vertically disposed pond plates arranged in spaced parallel relation to each other, a slice plate carrier arranged between said pond plates, a slice plate secured to the lower portion of said carrier, means pivotally supporting the upper portion of said carrier from the upper portion ofthe pond plates and affording a horizontal axis about which the carrier is swingable to shift the slice plate to different positions of adjustments and means connected between the lower portions of the pond platesand said carrier for swinging said carrier to its different positions of adjustment about said pivotal axis, said last mentioned means comprising a pair of link members having corresponding ends thereof pivotally secured to the lower portions of the pond plates, gear casings secured to the lower portions of the sides of said carrier, shafts journalled in said gearcas- REFERENCES orrEn I The following references are of record in the file of this patent:

' UNITED STATES PATENTS Number Name Date 1,526,193 Voith Feb. 10, 1925 1,619,168 Valentine Mar. 1, 1927 1,866,607 Wood July 12, 1932 1,936,609 Teale Nov. 28, 1933 2,027,611 Niks 'Jan. 14, 1936 2,325,016

Warren July 20, 1943

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