US2402063A

US2402063A - Papermaking machine

Info

Publication number: US2402063A
Application number: US441737A
Authority: US
Inventors: Bernard A Malkin
Original assignee: Dominion Engineering Works Ltd
Current assignee: Dominion Engineering Works Ltd
Priority date: 1942-01-30
Filing date: 1942-05-04
Publication date: 1946-06-11
Anticipated expiration: 1963-06-11

Description

June 1l 1946- B. A. MALKIN 2,402,063

PAPER MAKING MACHINE Filed May 4, 1942 2 Sheets-Sheet l l l JY.; y

June 11, 1946. B A MALKlN 2,402,063

PAPER MAKING MACHINE Filed May 4, 1942 2 sheets-sheet 2` s?. w am o E?, mi

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9. :b L: uwen-ron en E B.A.MALKIN ATTORNEY BY Y , Patented June 11,1946

UNITED syATE s- PATENT oFPflcE PAPERMAKmG MACHINE Bernard A. Malkin, Lachine, Quebec, Canada, as-

signor to Dominion EngineeringWork's Limited, Lachine, Quebec, Canada l Application May 4, 1942, Serial No. 441,737 InCanada January 30, 1942 exceptionally good quality formation may be made or as a counter flow machine on which a 'wide variety of heavy weight sheets of exceptionally good quality formation may be made.

Another object is the provision of a reversible ilow machine which, when operated on the direct flow principle, is adjustable to produce either light weight or heavy weight sheets of exceptionally good quality formation at higher operating speeds than is possible with the direct ow machines now in use.

Another object is the provision of a reversible rnow machine which, when operating on either the direct flow or counter flow principle, is adjustable to establish the best relationship between all the variable lfactors which4 affect the formation, weight and other characteristics desired in the finished sheet.

A more specic object is the provision of a machine provided withkmeans of adjustment whereby the operating speed, the mold head. the consistency or freeness of the stock, and the velocity and direction of flow of the stock around the submerged or sheet forming 'portionV of the mold, may be regulated independentlyor in such relation to each other to provide the optimum conditions ior the production Vof a sheet ci given formation and weight characteristics.

A further specific object is the provision of a machine in ywhich the vat is provided with inner and outer vat circles defining an intervening apph pge through which the stock is delivered to a iiow passage formed by the circle clearance reserved between the mold and the inner vat circle, suitable flow reversing valves being provided to permit operation of the machine on either the direct iiow or counter flow principle. f

A further object isthe provision of a reversible iiow machine in which the vat is provided with a fixed Outer vat circle and an adjustable inner vat circle, the inner vat circle being adjustable relatively to the outer vat circle and the mold sothat the velocity of flow of stock around the sheet forming portion of the mold maybe so .reg-

in relation to the mold head. the speed of 11 claims. (ci. i12- 43) the mold, and the freeness of the stock as to provide optimum conditions for the formation of the type of sheet which it is desired to produce.

Another object is the provision of a reversible flow machine of the inner and outer vat circle type in which the inner vat circle isconstructed so asto permit stock to' ilow into the iiow passage between the mold and inner vat circle at a plul rality ofpoints spaced around the submerged or sheetforming portion of the mold.

Other objects, advantages and characteristic l features of the invention will be more readily uninclusive, 6 designates a pulp vat in which a cylderstood from the following detailed description taken in connection with the accompanying drawings, in which- Fig. 1 is an end elevation of one form of reversible paper making machine constructed in accordance with our invention.

Fig. 2 is a transverse sectional view of the machine shown in Fig. 1.

Fig. 3 is a fragmentary along the line 3-3 of Fig. 1.

Fig. 4 is a. view similar to Fig. 2 but showing a slight modification of the inner vat circle.

Fig. 5 is a view similar to Figs. 2 and 4 but showing a further modification of the inner vat circle.

Fig. 6 is a view similar to Mis. 2, 4 and 5 but shows a still further modiiication of avat circle.

Referring to the machine shown in Figs. 1 to 3 -sectional view taken inder mold 6 is rotatably mounted in the usual manner. Each end wall of the vat is provided with the conventional opening 1 through which white water passes from the mold 6 into a conventional spill gate chamber l. The amount of white water thus delivered to chamber l is considerably greater than can be carried off bythe main discharge pipe 9 so that the white water rises in chamber 8 to a level which is predetermined by the setting of the conventional adjustable spill gate Ill, the excess water spilling over this gate and beingdischarged through a suitable overflow outlet I I.

As shown more particularly in Fig. 2,. thevat I isconstructed to provide an inner vat circle i3 and an outer vat circle I4 defining an intervening .approach passage il provided with a' pulp stockinlfet opening i8 which is preferably located belowA the axis of rotation of the mold l. The inlet opening I8 is iiankedby outlet conduits I1 and i8, the inner ends of which communicate with approach passage Il at some distance from inlet I6. A pivotally mounted iiow controlling valve I! is provided at the inner end of outlet I1 and a similar valve 20 is provided at th'e inner end of outlet I8. The valve IS'may be shifted from the dotted line to the full line position shown in Fig. 2 and vice versa. When valve I9 is in the dotted line position it closes. of! the inner the said leit hand portion of the passage i5 andl the remainder of'said passage. Similarly the valve 20-may be shifted from the dotted to th'e full line position shown in Fig. Zand vice versa.

` In its i'ull line position valve 20 closes oi the inner end of outlet I8 and leaves unobstructed all the levers 30 attached to the trunnion extensions that portion of the approach passage I5 which .lies to the right of the inlet I6. When valve is shifted from the full to the dotted line position it places the outlet I8 in communication with the right hand portion of passage I5 which is located directly above th'e said outlet and closes on communication between the said right hand portion of passage I5 and the remaining portion oi' said passage. This arrangement of the valves Hand 20 enables the 'machine to be operated on either the direct ilow or counter ow principle, the direction of rotation loi' the cylinder mold 6 being indicated by the` arrow X. When the machine is to be operated on the counter flow principle the valves I8 and 20 are both shifted to the full line positionshown in Fig. 2. The stock ad-` mitted to the approach passage l5 through inlet I8 is prevented by the valve I9 from ilowing to the left hand end of the approach passage. It therefore must ilow to the right hand end of passage I5 and from thence into the right hand end of the now passage 22 reserved between the cylinder mold 6 and the inner vat circle I3, the flow of stock around passage 22 and the submerged or sheet forming portion of mold 6 being opposite or counter to the direction of rotation oi said mold. This method of operation is resorted to in cases where it is desired to increase the difterence in speed between .the mold and stock iiow as compared with operation oi' the machine on the direct ilow principle. l

When` the machine is to beA operated on the direct ilow principle the valves I8 and 20 are shifted from the full to the dotted line position shown in Fig. 2. In this position of the valves theestock admitted through inlet I 5 ows to the left hand end of th'e approach passage 'Il and from thence into the left hsndrend oi the iiow passage 22 to that the stock ilows'through the passage 22 in the same direction as the rotation may be constructed in In Figs. land 2itis sh'own asl 29 may be turned t0 swing the bottom section 21 of the inner vat circle to various positions of angular adjustment about the pivotal axis afforded by said trunnion extensions and without changing the elevation o! said extensions. It will also be seen that the bottom section 21 of the inner vat circle may be raised and lowered as a whole and also shifted laterally by rotating the eccentrics 3i to diiferent positions of angular adjustment about thetrunnions 29 through the agency ofthe operating worms 33. The main purpose in making the bottom section 21 of the inner vat circle adjustable as herein described is to enable the circle clearance between the cylinder mold and the bottom portion of .the inner vat circle i3 to be varied so that the velocity ci iiow 'of stock around the bottom or sheet forming portion of the cylinder mold may be regulated tovsuit the mold head; the speed of operation; the freeness of the stock; and the type of sheet which it is desired to form on the machine.

Another advantage obtained by angular and/or vertical adjustment of the bottom section 21 of the vat circle is that it provides iiow openings 38 between the-side edges of the bottom section 21 and the adjacent lower side edges of the fixed side sections 25 and 26 of the inner vat circle. This permits the stock to pass from the approach passage I5 to the flow passage 22 through ow passages located at different points around the sheet forming portion of the cylinder mold as distinguished from arrangements in which the passages I5 and 22A are in communication with' each other only at the end portions thereof. The additional flow passages 38 also make it possible` to .providemore uniform velocity conditions around the entire sheet forming portion of the cylinder mold. Adjustable weirs 39,.working in suitableguides 40, are provided at the upper edges of the inner vat circle sections 25 and 2t and may be raised and lowered through the4 agency of any suitable type of weir adjusting mechanism (not disclosed).

Referring to the modification shown in Fig. 4,

' the'bottom portion of the inner vat circle i3 is divided into a plurality of independently adjustable sections designated 21a. 2lb and 21e, each 'oi' fwhlch is mounted for adjustment by the same means as that described in connection with the single adjustable bottom wall sections 21Ashownin Fig. 2. As compared with Fig. 2,-

the arrangement shown in Fig. 4 provides a greater number of intermediate flow passages 38 through which stock may flow from the approach passage' I5 to the flow passage 22 at In this connection itA rotatably supported by eccentrica 3| rotatably mounted' in suitable bearings 32 each eccentric:v

. points around the sheet forming portion oi' the cylinder mold 8. As compared with Fig. 2 the arrangement shown in Fig. 4 also provides for a closer regulation oi' velocity conditions around thesheet forming portion of the cylinder mold.

According to the modification shown in Fig. 5 the entire inner vat circleis adjustable in its entirety since it consists of a single section provided centrally of its width with trunnion exten-v sions 28a which are adjustably mounted in Veil:- actly the same manner as described in connection with the trunnion extensions 28 o! Fig. 2. Inthis case the tilting of the inner vat circle about the pivotal axis of the trunnion extensions 28a varies the clearance between the cylinder mold and the ends ot the inner vat circle 'as well as between intermediate portions oi the mold and opposing portions of the inner vat circle. Likewise, in the arrangement shown in Fig. 5, vertical adjustment of the inner vat circle varies the elevation of the adjustable weirs 39 for any particular weir setting.

According to the modification shown in Fig. 6, the inner vat circle I3 consists of a single section which is fixed in relation to both the outer vat circle- I4 and the cylinder mold 6. In this case it will also be noted that the inlet and outlet connections Il and I8 and the ow reversing valves I9 and 20 are located immediately adjacent inlet I5 instead of spaced therefrom as shown in the preceding gures.

In the operation of cylinder machines made in accordance with this invention it will be seen that the mold head may be regulated by adjustment of the spill gates I0. It will also be seen that, as regards the machine shown in Figs. 2 to 5 linclusive, the velocity of flow between the inner the flow passage 22. It may also be pointed out that adjustment of the inner vat circle to increase the area of theflow passage 22 enables the consistency of the stock to be varied while maintaining the same flow or velocity conditions around the sheet forming portion of the mold.

The net result is that with machines constructedv in accordance with this invention it is possible to form a wide variety of light weight and heavy weight sheets which could not previously be formed on a single machine/of the cylinder mold type.

Having thus described my invention, what I claim is: v l

l. A cylinder paper machine comprising a vat,v

an inner vat-circle wall of generally cylindrical curvature in cross section extending between the end walls of the vat in spaced lrelation to the bottom and side walls of the vat. a. cylinder mold journalled in said vat in spaced opposing relation to the inner vat-circle wall to form therewith an inner vat-circle space affording an inner fiow passage connecting the ends of an outer flow passage afforded by the space between the inner vatcircle wall and the opposing bottom and side Walls of the vat, the outer defining wall of said outer ow passage being provided with astock inlet located intermediate the ends of said passage and with two stock inlets located at opposite sides of the inlet and between the latter and the ends of said passage and a separate flowdirecting valve controlling each outlet and movable across the outer flow passage from a position covering said outlet to a position blocking the portion of the outer flow passage located between said outlet and said inlet.

2. A cylinder paper machine asset forth in claim 1, in which each ci' said valves comprises a flap valve pivoted to the outer-defining wall of said outer ow passage.

3. A cylinder paper machine as set forth in claim 1, including means mounting the inner vatcircle wall for pivotal adjustment about a pivotal axis located below the axis of rotation of the cylinder mold.

4. A cylinder paper machine as set forth in claim 1, including means mounting the inner vat circle wall for vertical and angular adjustment in relation to the cylinder mold and the bottom and side walls of the vat.

5. A cylinder paper machine as`set forth in claim 1, including means mounting the inner vatcircle wall for vertical and angular adjustment in relation to the cylinder mold and the bottom and side walls of the vat, said means comprising rotatably mounted eccentrics, trunnions carried by said inner vat-circle wall and journalled in said eccentrics, means for turning said trunnions relative to said eccentrics to thereby eiect the aforesaid angular adjustment of the inner vat-` circle wall, and means for turning said eccentrics relative to said trunnions to thereby effect the aforesaid vertical adjustment of the inner vatcircle wall.

6. A cylinder paper machine as set forth in claim 1, in which the inner vat-circle wall comprises xed side wall sections, a separate adjustable central wall section,V and means mounting said central wall section'for vertical adjustment relative to the iixed side wall sections and thelcylinder mold.

mounting said central wall section for angular adjustment relative `tothe fixed side wall sections and the cylinder mold.

8. A cylinder paper machine as set forth in claim 1, in which the inner vat-lcircle wall comprises fixed side walhsections, a separate adjustableV central wall section, and means mounting said central wall section for vertical and angular adjustment relative to the fixed side wall sections and the cylinder mold. v

9. A cylinder paper machine as set forth in claim 1, in which the inner vat-circle wall comprises xed side wall sections, a separate .adjustable central wall section and means mounting said central wall section for angular and vertical adjustment-relative to the xed side wall sections andv the cylinder mold, said mounting means comprising rotatably mounted eccentrics, trunnions carried by said central wall section and journalled in said eccentrics, means for turning said trunnions relative to said eccentrica to thereby eect the aforesaid angular adjustment of said central wall section, and means for turning said eccentrics relative to said trunnions to thereby eflect the aforesaid vertical adjustment of said central wall section.

10. A cylinder paper machine as set forth in claim 1, in which the inner vat-circle wall comprises fixed side wall sections, a plurality of seps rate adjustable central wall sections, and means mounting each central wall section for vertical adjustment relative to the xed side wall sections and the cylinder mold.

`11. A cylinder paper machine as set forth in claim 1. in which the inner vat-circle wallcomprises fixed side wall sections, a plurality of sepa.- rate adjustable central wall sections, and means pivotally mounting each central wall section for angular adjustment relative to the fixed side wall sections and the cylinder mold.

(MALHN.