US3772145A - Pivotal mounting structures for vertical twin-wire papermaking machine - Google Patents

Pivotal mounting structures for vertical twin-wire papermaking machine Download PDF

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Publication number
US3772145A
US3772145A US00129852A US3772145DA US3772145A US 3772145 A US3772145 A US 3772145A US 00129852 A US00129852 A US 00129852A US 3772145D A US3772145D A US 3772145DA US 3772145 A US3772145 A US 3772145A
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wire
frame member
wires
guide means
roll
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W Notbohm
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Black Clawson Co
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Black Clawson Co
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Assigned to WALTER E. HELLER & COMPANY, INC. reassignment WALTER E. HELLER & COMPANY, INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLACK CLAWSON COMPANY, THE
Assigned to BLACK CLAWSON COMPANY, THE reassignment BLACK CLAWSON COMPANY, THE RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: HELLER FINANCIAL, INC. F/K/A/ WALTER E. HELLER & COMPANY INC.
Assigned to CHEMICAL BANK, AS AGENT reassignment CHEMICAL BANK, AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLACK CLAWSON COMPANY, THE, HYDROTILE MACHINERY COMPANY
Assigned to BANK ONE, DAYTON, NATIONAL ASSOCIATION reassignment BANK ONE, DAYTON, NATIONAL ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). AMENDMENT TO AGREEMENT 6/01/88. SEE RECORD FOR DETAILS. Assignors: CHEMICAL BANK
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Assigned to HYDROTILE MACHINERY COMPANY (NOW KNOWN AS BC MANUFACTURING CO., INC.), BLACK CLAWSON COMPANY reassignment HYDROTILE MACHINERY COMPANY (NOW KNOWN AS BC MANUFACTURING CO., INC.) RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANK ONE, DAYTON, NATIONAL ASSOCIATION, CENTRAL TRUST COMPANY, N.A., DNC AMERICA BANKING CORPORATION
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type

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  • the invention relates to paper making machines generally of the type shown in Baxter U.S. Pat. No. Re. 25,333, and characterized by the incorporation of a pair of endless forming wires arranged to wrap a corresponding pair of horizontally spaced breast rolls in such manner as to provide a pair of opposed reaches which travel generally vertically from the breast rolls in closely spaced converging relation to create the zone wherein the paper sheet is formed.
  • the invention also relates to the similar vertical paper machines shown in Baxter et al U.S. Pat. No.
  • the rolls and the deflector assemblies or other guide means for supporting the reaches of each wire which define the forming zone are mounted on an essentially unitary frame member or module supported for pivotal movement toward and away from the complementary frame member for the guide means for the other wire.
  • Each of these frame members is of strong and rigid construction, and the deflectors for the associated wire are mounted thereon by mountings which are in reinforced relation with the structure of the frame members such that they are more than capable of withstanding all normal loads tending to cause deflection.
  • the individual deflectors can therefore be relatively thin, and they can be arranged in as closely spaced relation as is needed to establish the desired length and configuration of the forming zone.
  • pivotally mounted frame members has additional advantages especially when the arrangement is such that one frame member can move to a substantially horizontal retracted position, which is also the preferred position for wire changing. With the wires removed, the working surfaces of both sets of deflectors are exposed for ready access for adjustment, replacement or other maintenance purposes. Such maintenance operations are facilitated in accordance with the invention by providing the individual deflector assemblies with mounting connections which are easily accessible from the exposed working surface of the deflectors for removal or adjustment purposes.
  • FIG. 1 is a diagrammatic view in side elevation showing a vertical paper machine constructed in accordance with the invention and with all of the parts in operative position;
  • FIG. 2 is a view similar to FIG. I but showing the positions of the parts during wire changing;
  • FIG. 3 illustrates somewhat diagrammatically the storage condition of the apparatus for changing the carrying wire in FIG. 2;
  • FIG. 4 is a perspective view of the frame member for carrying the breast roll and guide means for the carrying wire, the frame member being shown with all guide means removed;
  • FIG. 5 is a view partly in elevation and partly broken in section on the line 55 of FIG. 6 illustrating details of the construction and mounting of one of the deflector assemblies;
  • FIG. 6 is a fragmentary plan view of the deflector assembly shown in FlG.
  • FIGS. 7 and 8 are diagrammatic views illustrating the application of the invention to other designs of vertical paper machine.
  • FIGS. 12 The vertical paper machine illustrated in FIGS. 12 is generally of the design shown in US. Pat. No. 3,573,161 and it includes a pair of breast rolls l0 and 11 supported in horizontally spaced relation.
  • a pair of forming wires 12 and 13 are looped around the respective breast rolls l0 and ii and are brought together partially around a single roll 15 mounted by a bracket or support means 15a in the position of a couch roll below and generally in line with the lefthand breast roll 10, but roll 15 is solid and is therefore more properly termed a turning roll for the wires 12-13, the term wires" being used generically as including foraminous forming webs of any suitable material.
  • the remainder of the loop of the lefthand or backing wire 12 is supported by a turning roll 16 and an adjustable guide roll 17.
  • the righthand or conveying wire 13 is similarly supported by a suction roll 28, a turning roll 2i, return rolls 22 and 23, an adjustable guide roll 24 and a tensioningrolLZS.
  • the rolls It and 20, and preferably also the turning roll 21, are provided with adjustable drive means (not shown) to cause the wires to travel downwardly from the breast rolls til-l1 in desired speed relation, which is preferably essentially synchronous.
  • the reaches of the wires 12 and 13 directly below the breast rolls l0 and 11 are guided so that they converge to define therebetween a forming zone 30 of generally triangular section open at its larger end to the gap 31 between the breast rolls to receive stock from the headbox 33, which is represented diagrammatically and is preferably of the construction shown in application Ser. No. 703,299, now US. Pat. No. 3,578,560.
  • the wire reaches defining the forming zone are guided by deflector assemblies 35 which engage the inner surfaces of these wire reaches in supporting relation, and which also serve to skim off water expressed through the wires and to guide this water away from the wires.
  • the upper edge of a suction box 37 mounted below the lowermost of the deflectors 35 within the loop of the carrying wire 13 also acts as a deflector, and the lowermost deflector within the loop of the backing wire 12 may be similarly combined with a suction box 38.
  • the spacing and arrangements of the deflectors 35 with respect to each other and to the gap 3i above the forming zone are determined in accordance with the principles described in application Ser. No. 755,602, now U.S. Pat. No. 3,578,556, so that the stock is delivered as a sheet-like jet to the upper end of the forming zone by the headbox 33 and impinges on the wires 1243 below the level at which the pumping action of the breast rolls Ell-l1 would tend to draw liquid through the wires, i.e., substantially below the line of tangency of each wire with its associated breast roll.
  • the stock is progressively dewatered as it travels downwardly with the forming wires until at the level of the suction box 37, the major volume of free water has been expressed through the wires, and the fibers remaining between the wires have been compacted and felted into a mat or sheet which provides a bridging structure between the wires.
  • the suction box 37 After the two wires with the sheet therebetween pass the suction box 37, they partially wrap the turning roll 15 and proceed laterally toward the suction roll 20. Just beyond the roll 15, there is located afixed suction box 40 over which the two wires pass, but the turning roll 16 for the backing wire 12 is so located beyond the suction box 40 as to cause wire 22 to diverge from wire 13 as the two wires pass across the suction box 4G.
  • the action of the suction box 4% will therefore hold the sheet on the generally horizontal run of the conveying wire 13 while wire 12 diverges therefrom toward its turning roll 16.
  • suction box 40 The sheet travels beyond suction box 40 on the upper surface of the horizontal run of wire 13 toward the suction roll 20, and additional suction boxes 41 may be located between suction box MB and roll 2% if desired.
  • a suction pickup roll 44 and cooperating felt 45 are located to pick the sheet up from wire 13 as it travels from roll 20 to roll 21, this arrangement being essen tially the same as a conventional suction pickup from a Fourdrinier machine having a suction couch roll and a wire drive roll in the positions of rolls 2021.
  • the invention is especially concerned with the provision of supporting structure for the operative parts of the paper forming section as outlined above which will contribute to the simplicity of the construction, mounting and maintenance of the deflectors 35, and which will also contribute to the ease of changing the forming wires.
  • the fixed base structure is per' manently mounted at the back side of the machine. it includes sole plates and the overhead framework comprising vertical beams 51 and 52 and the longitudinal beams 53 which support the headbox 33.
  • Cantilever beams 55, 56 and 57 are also permanently mounted at the back of the machine, and the usual removable blocks are provided to support the front ends of these beams, as indicated by such blocks 58.
  • the main support for the breast roll 11 and its associated deflector assemblies 35 is an essentially unitary frame member 60 of generally tub-like structure so that it also forms the receptacle for the liquid removed by the deflectors which engage the wire 13.
  • Baffles ell extend the full width of the machine internally of the member 61 and act both as reinforcing ribs and to guide the liquid received from the deflectors 35. This accumulated liquid may be removed at the machine by any convenient piping from the discharge outlet indicated at 62.
  • the frame member 641 also forms the support for the turning roll 23 and guide roll 24.
  • the frame member 60 is mounted on the fixed base structure by a pivoted mounting 65 on brackets 66 which extend from the ends of the side rails 67 of the main frame.
  • the frame member so is movable on this pivotal mounting between its generally vertical operative position shown in HG. 1 and its generally horizontal retracted position shown in FIG. 2.
  • Means for ef fectin g this movement are shown as comprising one of a pair of cables 7% running from a reel (not shown) around pulleys 71 on the stationary framework and over a pair of capstans '72 at opposite sides of the frame member 66 to fixed points of attachment 73.
  • the main support for the breast roll ill and its associated deflectors 35 is a second essentially unitary frame member which also serves as the support for the couch roll 12.
  • the frame member 50 is similarly of tub-like structure and includes interior reinforcing ribs or baffles 81 and a discharge outlet 82 at the back side of the machine.
  • the frame member 80 is provided with a pivotal mounting 85 on the cantilever beam 55, and a screw jack 88 connected between the beam 55 and member 80 causes controlled movement of member 80 about pivot 85 between its generally vertical operating position shown in FIG. 1 and the retracted position shown in FlG. 2 for changing of the wire 12.
  • a third frame member 911 shares the pivotal mounting 85 with its frame member 60 and forms the main support for the other supporting rolls within the loop of wire 12, such as the rolls 16-17. Movement of frame member 90 on pivot 85 is primarily for controlling the tension of wire 12 as well as for wire changing, and such movement is effected and controlled by means such as a bellows diaphragm 91 connected between the beam 55 and member 90 through a bracket 92.
  • the wire guide roll 17 is shown as mounted on the upper end of member 90 by a lever arm 93 pivoted on member 90 at 94 and controlled by a pressure diaphragm 95, which may be actuated in any conventional way to move one end of roll 17 as required to maintain the wire 12 running straight.
  • the vertical alignment and configuration of the forming zone 31) are determined by the operative positions of the frame members 60 and 80. Accordingly, the operative position of the frame member 80 is preferably fixed by means such as an adjustable stop nut in the screw jack 88. The operative position of the frame member 61) is then similarly readily established by means such as the latch mechanism 100 for locking the two frame members 60 and 80 together, preferably at both the front and back of the machine. Adjustable stop nuts 101 on this latch mechanism provide for adjustment of the operative position of the frame member 60.
  • the frame members 60 and 80 are constructed to contribute major advantages of strength and rigidity to the deflectors 35 and their mountings, together with significant advantages of ease of maintenance and replacement of deflector assemblies. Another advantage derived from these structural features is the ability to establish the forming zone with its length very short in the direction of wire travel even in a very wide paper machine, with resulting convenience and economy of over-all construction. Since the frame members 611 and 80 are of generally the same basic construction from the standpoint of these features, the details of only frame member 611 are shown in the drawings.
  • the frame member 60 is preferably constructed as a unitized weldment, composed of end walls 110 connected by the back wall 111 and the baffles or reinforcing ribs 61. Additional reinforcement is provided by multiple ribs 112 arranged parallel with the direction of wire travel at appropriately spaced positions across the width of the machine. Also a walkway 115 may advantageously be provided, preferably by a permanent mounting, to extend between the end walls 110 at a position between the suction box 37 and the pivotal mounting 65 for use in the horizontal position of member 60.
  • FIGS. 5-6 show a preferred construction of deflector assembly which includes a deflector blade 120 of any material, such as Micarta, found satisfactory for the purpose.
  • the main support for the blade 1211 is a bar 121 of obtuse angular section such that the leg 121a which supports the blade 120 will extend in generally the desired angular relation with the direction of wire travel therepast.
  • the other leg 121b is rigidly secured to the frame member 120, for example by bolting at its ends to the end walls as indicated at 122.
  • this leg 121b is preferably secured for further bracing to the adjacent edge of each of the reinforcing ribs 112, as indicated by the bracket assemblies 123.
  • a slot 124 at the junction of the two legs of bar 121 provides for resilient movement of leg 121a with respect to leg 121b.
  • a smaller bar 125 complementary in section to bar 121 has its upper leg welded or otherwise secured to the leg 121a, and its other leg depends in spaced relation with the leg 12%.
  • a series of jack screws 127 are threaded into the leg 121b, and each of these jack screws has a conical point 128 engaging a conical recess in the opposed face of the bar 125.
  • Means are provided for rotating all of the jack screws 127 together, such as the pulley 130 on each screw 127 and cable 131 forming a driving connection between all of the pulleys 130 which is accessible from one end of bar 121, so that as the jack screws are threaded out of the bar leg 121b, they will thrust the bar 124 in clockwise direction in FIG. 5 and thereby cause the bar leg 12111 to move upwardly against its natural resilience and the downward load applied thereon by the engagement of the associated wire and deflector blade 120.
  • a plate 134 is welded or otherwise secured on top of the leg 121a and projects beyond the outer edge of this leg toward the wire.
  • the blade support body 135 has its forward edge shaped to a resilient hook 136 which engages over the projecting edge of the plate 134.
  • a plurality of links 140 have their forward ends pivoted at 133 to the bar leg 121a, and their rearward ends are pivoted at 141 to the rearward portion of the blade support body 135 so that swinging movement of these links .will cause the body 135 to move on the plate 13 toward and away from the adjacent forming wire.
  • the deflector blade 1211 is retained on the support body 135 by an elongated clamp 1441 having a hooked forward edge 145 for engaging a complementary groove in the upper surface of the blade 120.
  • the clamp 144 is secured by a row of screws 1416 to a bar 147 welded on the body 135.
  • a similar bar 1418 is also welded on body 135 in spaced relation with bar 147 to form therewith a space receiving a resilient tube 149 connected to a source of pressure air. When pressure is applied to this tube, it will expand sufficiently to tilt the clamp 144 in counterclockwise direction as viewed in MG. 5 and thereby to cause the forward edge of clamp 144 to force the deflector blade 1211 against the support body 135.
  • the blade 1211 is easily withdrawn lengthwise and similarly replaced.
  • this deflector assembly will make it possible to move the deflector blade 12@ toward and away from the associated forming wire by moving the blade support body 135 through swinging movement of the links 140.
  • This movement can be accomplished while the machine is running by the push-pull drive shown in FIG. 5.
  • a link i156 is pivoted to one end of the body 135, and its other end is pivotally connected to a screw 151 threaded through bracket i152 mounted on the end of the bar leg 121a for access from outside the machine. Threaded movement of the screw 151 will produce the desired movement of the deflector assembly, which can be locked in any desired position by the lock nuts 153 on screw 151.
  • the part 155 in FIG. is a shield of sheet metal or the like for deflecting spray and other free water.
  • the construction of the frame member 80 and the arrangement for mounting the deflector assemblies which it carries are essentially the same as described for the frame member 60, the only differences between these two frame members being in over-all configuration and dimensions as dictated by the different functions which they perform in the machine.
  • the construction of the deflector assemblies and their cooperative relation with the over-all structure of the frame members 60 and 80 provide significant practical advantages.
  • the mounting bars 121 and 125 are readily made of sufflciently heavy stock to produce substantial inherent rigidity, and they are further braced and stiffened by their connections to the walls and reinforcing ribs of the associated frame member.
  • each deflector assembly It is therefore not necessary to design rigidity and resistance to deflection into the deflector blades or their associated parts in each deflector assembly, and this in turn makes it possible to construct each deflector assembly with a relatively short dimension in the direction of wire travel. Width of the paper machine is also not a factor in establishing this dimension, and it is therefore possible even in a very wide machine to utilize a total of eight individual deflectors as shown in FIG. I and still to keep the over all length of the forming zone as short as approximately four feet.
  • FIG. 2 shows the forming members as and 80 in their respective positions for the changing of both wires, and it also illustrates wire changing apparatus designed for use with this paper machine.
  • the wire stringing apparatus for the conveying wire 13 comprises only two main components, namely a pair of frames 60 and 161 shown in FIG. 3 in their storage po sition in which they may be nested together along with the wire-carrying poles 162 and the coiled new wire 163.
  • the two frames and 161 are stationed sufficiently apart so that they can be moved laterally of the machine past the turning roll 2i and the breast roll 11 in its lowered position.
  • the wire Prior to this movement, the wire is strung as shown in FIG. 2 on the poles H62, and the entire assembly is then moved to locate the wire on the machine in the usual way for a Fourdrinier paper machine as represented in FIG. 2.
  • the wire changing apparatus for the backing wire 12 comprises a generally A-shaped frame having a cross brace 171 at its front end and having mountings 172 at its rear end for support on tracks 1'73 suspended from the longitudinal beams 53.
  • the frame 170 is constructed to carry the usual removable poles 175, and with the wire strung thereon while the frame is in the aisle in front of the machine, it can then be moved Iaterally to drape the wire over the four rolls 10, t2, t6 and l7. It will be understood that for changing operations, the appropriate blocks 58 at the front side of the machine are removed to leave the necessary section or sections of the machine supported by cantilever beams are required to provide space for receiving the wires.
  • the base and frame structure may comprise the corresponding portion at the dry end of a Fourdrinier section
  • the roll 20 may be the suction couch roll of a Fourdrinier machine
  • the rolls 2], 22 and 24 may be similarly adapted from an existing machine along with the suction boxes 40 and 41.
  • the forming zone in accordance with the invention can be so short that even in the retracted position of the frame member 60, the breast roll Ill will be closer to the roll 20 than the breast roll of the corresponding Fourdrinier section, and this is a substantial saving in space requirements while still providing ample space for the necessary movement of the frame member 6%.
  • FIG. 7 illustrates diagrammatically the application of the invention to a vertical two-wire paper machine utilizing a pair of couch or turning rolls similarly to the machines disclosed in some of the above noted patents and applications.
  • the arrangement of parts for supporting and guiding the backing wire 12 are essentially the same in construction and arrangement as in FIG. 2, and they have accordingly been identified as l0, l2 and so forth.
  • Some of the parts for supporting and guiding the conveying wire 13' are similarly of the same construction and arrangement as in FIG. 1, and they also have been identified as M, 25' and so forth.
  • the additional couch roll X86 for the conveying wire 13' is a suction roll mounted below the breast roll 11 and at a level below that of the turning roll l5, and a pickup roll K81 and pickup felt R82 are arranged to pick up the sheet from the reach of wire 13' between couch roll will and the adjacent turning roll 185.
  • the frame member 6% can pivot about its pivotal mounting 65 to a retracted horizontal position essentially the same as that of the frame member 60 in FIG. 2. This is the position for wire changing, and it will be understood that the couch roll 180 will have a cantilevered mounting at the front side of the machine in the usual way. It will be apparent that in the retracted position of the frame member 60, the working surfaces of the deflectors on each of the frame members 60' and 80' will be exposed for ready access for the purposes already described. It will also be understood that the wire 13 can be guided in many other patterns by suitably located rolls without the loss of any of the advantages of the invention.
  • FIG. 8 shows the application of the invention to a two-wire vertical paper machine wherein the wires are arranged to travel upwardly as they define the forming zone, substantially as shown in the above application Ser. No. 771,888, now U.S. Pat. No. 3,597,315.
  • the breast rolls 200 and 201 are each provided with an associated turning or couch roll 202 and 203, and the wires 204 and 205 travel upwardly from the breast rolls to the couch rolls in converging relation defining the forming zone 210 which receives stock jetted upwardly from the headbox 212 as described in application Ser. No. 771,888.
  • the arrangement of deflectors 215 is similar to that shown in FIG.
  • each deflector is inclined upwardly away from the adjacent inner surface of the associated wire, and the uppermost deflector for the conveying wire 205 is combined with a suction box 217 to assure that the sheet adhere to the wire 205 as it wraps the couch roll 203, which is shown as a suction roll mounted by a bracket or support means 203a and having a suction box 218 for additional dewatering of the sheet.
  • the suction pickup roll 220 and felt 221 pick up the sheet from the wire run between the rolls 222 and 223.
  • the suction couch roll 203 and the deflectors 215 for the conveying wire are mounted on a frame member 225 which has essentially the same structural features as the frame member 60 but may be of somewhat different overall dimensions and configuration as may be required, such as the internal reinforcing baffles 226.
  • the frame member 225 is provided with a pivotal mounting 228 on which it can be moved to a substantially horizontal retracted position, represented by the dotted line showing of the couch roll 203, for wire changing and servicing of the deflectors.
  • the frame member 230 which carries the couch roll 202 and the associated deflectors 215 is of essentially the same basic construction as the frame members 80 and 225, as well as of very similar configuration.
  • Apparatus for forming a paper sheet between a pair of looped forming wires and including a base structure, a pair of breast rolls cooperating to support a pair of reaches of said wires in opposed relation defining a generally vertically extending forming zone having a mouth for receiving paper making stock therethrough, a turning roll located at the opposite end of said fonning zone from said mouth, guide means arranged within the loop of each of said wires to engage and guide said reaches in generally vertically converging relation from the respective said breast rolls to said turning roll and thereby to cause said wires to exert pressure on stock within said fonning zone forcing the liquid therein to be extruded through said wires while the fibers remaining therein form a paper sheet, guide roll means positioned within the loop of each of said wires to cause said wires to wrap an angular portion of said turning roll and thereafter to separate from each other, and means for causing said sheet to adhere to one of said wires as the other said wire diverges therefrom said apparatus further comprising:
  • said predetermined spaced relation between said pivotal mounting andsaid turning roll being such that movement of said frame member to said retracted position unwraps said one wire from said turning roll and thereby provides sufficient slack for changing said wire.
  • Apparatus as defined in claim 2 further comprising means establishing a substantially vertical operative position for said first frame member and a substantially horizontal retracted position therefor with said guide means thereon facing upwardly.
  • Apparatus as defined in claim 4 further comprising means establishing a substantially vertical operative position for said first frame member and a substantially horizontal retracted position therefor with said guide means thereon facing upwardly.
  • said turning roll is a suction roll having a suction box located in the portion thereof wrapped by said wires.
  • said guide means include a plurality of individual deflector assemblies each including a deflector blade for engaging the inner surface of the associated said wire to remove the extruded liquid therefrom, and wherein said first frame member includes internal reinforcing means cooperating with said deflector assemblies to support and brace said deflector blades against deflection.
  • each said deflector assembly includes a bar extending substantially the full width of said forming zone, and further comprising means securing said bar to each said rib and to opposite end portions of said said frame member.
  • said guide means include a plurality of deflector blades for engaging the inner surfaces of the associated said wires to remove the extruded liquid therefrom, supporting means for said deflector blades including a substantially rigid bar for each said deflector, reinforcing means for supporting said bar in rigidly braced relation with said frame member, and means forming removable connections between each said bar and said frame members at locations accessible from the working surface of said guide members in the retracted position of said first frame member when the associated said wire is removed.
  • Apparatus as defined in claim 1 further comprising a walkway secured on said first frame member at a location below the level of said guide means mounted thereon, and means establishing a substantial vertically operative position for said frame member and a retracted position therefore wherein said walkway is substantially horizontal to facilitate access to all of said guide means in said retracted position of said frame member,

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JP (1) JPS5414203B1 (sv)
AU (1) AU470488B2 (sv)
BR (1) BR7201912D0 (sv)
CA (1) CA950722A (sv)
DE (1) DE2214987A1 (sv)
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Cited By (7)

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US4033812A (en) * 1974-10-25 1977-07-05 Valmet Oy Dewatering systems for paper machines
US4125428A (en) * 1977-06-27 1978-11-14 The Black Clawson Company Vertical twin wire paper machine
US4324820A (en) * 1980-07-18 1982-04-13 St. Regis Paper Company Method and apparatus for coating a paper web
US4532008A (en) * 1983-07-22 1985-07-30 The Black Clawson Company Horizontal twin wire machine
US5074964A (en) * 1989-05-08 1991-12-24 Valmet-Ahlstrom Inc. Web forming apparatus having a double wire section
US5972168A (en) * 1989-08-22 1999-10-26 Voith Sulzer Papiertechnik Patent Gmbh Twin wire former
US6302678B1 (en) * 1997-03-28 2001-10-16 Bielomatik Leuze Gmbh & Co. Setting device for bending layer material more particularly paper

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
SE456590B (sv) * 1987-09-07 1988-10-17 Ahlstroem Valmet Anordning for styrning av viror i en pappersmaskin eller kartongmaskin

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US25333A (en) * 1859-09-06 Amalgamator
US3573161A (en) * 1968-10-17 1971-03-30 Black Clawson Co Vertical paper machine
US3578561A (en) * 1968-03-08 1971-05-11 Black Clawson Co Paper forming apparatus
US3597315A (en) * 1968-10-30 1971-08-03 Black Clawson Co Vertical twin-wire paper machine
US3623945A (en) * 1969-07-25 1971-11-30 Beloit Corp Wire-mounting arrangement on a twin-wire vertical papermaking machine

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Publication number Priority date Publication date Assignee Title
US25333A (en) * 1859-09-06 Amalgamator
US3578561A (en) * 1968-03-08 1971-05-11 Black Clawson Co Paper forming apparatus
US3573161A (en) * 1968-10-17 1971-03-30 Black Clawson Co Vertical paper machine
US3597315A (en) * 1968-10-30 1971-08-03 Black Clawson Co Vertical twin-wire paper machine
US3623945A (en) * 1969-07-25 1971-11-30 Beloit Corp Wire-mounting arrangement on a twin-wire vertical papermaking machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033812A (en) * 1974-10-25 1977-07-05 Valmet Oy Dewatering systems for paper machines
US4125428A (en) * 1977-06-27 1978-11-14 The Black Clawson Company Vertical twin wire paper machine
DE2827840A1 (de) * 1977-06-27 1979-01-18 Black Clawson Co Papiermaschine mit vertikalem doppelsiebband
US4324820A (en) * 1980-07-18 1982-04-13 St. Regis Paper Company Method and apparatus for coating a paper web
US4532008A (en) * 1983-07-22 1985-07-30 The Black Clawson Company Horizontal twin wire machine
US5074964A (en) * 1989-05-08 1991-12-24 Valmet-Ahlstrom Inc. Web forming apparatus having a double wire section
US5972168A (en) * 1989-08-22 1999-10-26 Voith Sulzer Papiertechnik Patent Gmbh Twin wire former
US6302678B1 (en) * 1997-03-28 2001-10-16 Bielomatik Leuze Gmbh & Co. Setting device for bending layer material more particularly paper

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FR2131746A5 (sv) 1972-11-10
GB1386805A (en) 1975-03-12
DE2214987A1 (de) 1972-10-19
SE384545B (sv) 1976-05-10
AU470488B2 (en) 1973-09-27
JPS5414203B1 (sv) 1979-06-05
IT952447B (it) 1973-07-20
BR7201912D0 (pt) 1973-05-31
AU4039772A (en) 1973-09-27
CA950722A (en) 1974-07-09

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