Classifications

• • 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
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F1/00—Wet end of machines for making continuous webs of paper
  • D21F1/48—Suction apparatus
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F1/00—Wet end of machines for making continuous webs of paper
  • D21F1/36—Guiding mechanisms
  • D21F1/38—Pads
• • 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

Definitions

• the present invention concerns a means for controlling wires in a paper machine or in a cardboard machine.
• the means relates to the controlling of wires
• controlling members to urge the lower wire upwards in a direction against the upper wire, which in its c turn lies against the dewatering box.
• controlling members act between the supporting table and the lower wire.
• German Patent No. 3,153,305 another wire controlling track is disclosed wherein a number of mutually spaced strips are present, lying against the lower wire. These strips are individually regu ⁇ lated as regards their pressure against the lower wire, with the
• each strip is pivotally connected with the spring member coordinated with the particular strip, and therefore the position of the top surface of the strips relative to the horizontal plane cannot be adjusted.
• the present invention teaches a means by the aid of which it becomes 1 possible to achieve what has just been said.
• the present invention relates to a means for controlling wires in a twin-wire section in a paper or cardboard machine where the wires run one over the other, for dewatering stock that is present between the wires, where a de ⁇ watering box is provided on one side of the wires and where a
• each one of the pressure elements comprises at least two force- n supplying members provided between the respective strip and the sup ⁇ porting table, said members being arranged to displace the strip in the direction towards and away from said dewatering box, that a first one of the members has been arranged to act against the forward end of the strip in the transport direction of the wires and that a second one of the members has been arranged to act against the rear end of the strip in said transport direction, and in that the force-supplying members are individually controllable so that on one hand the pressure of the strip against the wire and on the other hand the angle against the wire of the top surface of 0 the strip can be adjusted.
• - Fig. 1 shows a sectional view of a twin-wire section for a paper machine where the present invention is applied.
• 1 - Fig. 2 shows, on larger scale, one strip and ancillary control members according to the invention, in section conforming to the section in Fig. 1.
• Fig. 4 shows a first alternative embodiment of the control member, in section conforming to the section in Fig. 1.
• FIG. 5 shows a second alternative embodiment of the control member, in section conforming to the section in Fig. 1-.
• FIG. 6 shows various embodiments of force-supplying members, * c the figures being schematic sections taken in a vertical plane corresponding to the section A-A in Fig. 1.
• FIG. 1 an elevational view is shown of a twin-wire section 1 of a paper machine, where the upper wire 2 runs over deflection
• Fig. 1 are also shown a multitude of set-up members, which are of a kind known in the art and which
• a dewatering run comprising a dewatering box 10 containing three chambers I, II and III, which carry differ- 30 ent degrees of vacuum. Water from the stock is drawn up by ducts 11 into the chambers. The ducts 11 are included in the bottom 12 of the dewatering box 10. The upper wire 2 runs against this bottom.
• a supporting table 13 mounted 35 fixedly relative to the dewatering box 10, this table being carried on a stand which has been generally denoted with reference numeral
• a control member in the shape of a number of pressure elements 15 arranged to press the strips 16 upward in Fig. 1 and thereby to apply pressure against the lower wire 7, and thereby against the stock.
• the strips 16 are provided with grooves 18 for carrying off water from the stock.
• each one of the pressure elements comprising at least two force-supplying members 19,20;21, 22;23,24, between the respective strip 16,31,32 and the supporting table 13.
• the members 19-24 are disposed to displace the strips in
• a first one of the members 19;21;23 is disposed to act against the forward end 25;26;27 of the respective strip 16,31,32 in the transport direction of the wires, and a second one of the members 20;22;24, to act against the rear end 28;29;30 of the strip in the transport 5 direction of the wires.
• the force-supplying members 19-24 are individually controllable so that on one hand the pressure of the strip against the lower wire, and on the other hand the angle of the top surface 0 of the strip with reference to the lower wire, can be adjusted.
• the strips 16,31,32 are placed parallelling each other, and spaced from each other.
• the distance between strips amounts only to a fraction of the width of one 5 strip in the transport direction of the wires.
• the present invention therefore results in every strip being indi- ⁇ jO vidually adjustable so that optimum control of the controlling track in the twin-wire section can be obtained.
• the force-supplying members comprise rubber bellows or equivalent, ⁇ J arranged to be controlled with the aid of compressed air.
• Fig. 2 a first embodiment of the invention, correspond ⁇ ing to the embodiment depicted in Fig. 1.
• the supporting table comprises a supporting heel 33, mounted on the carrying frame 34 of the sup ⁇ porting table 13.
• each one of the 25 force-supplying members consists of a rubber bellows 19,20, where the two bellows 19,20, seen in section transversal to the longi ⁇ tudinal direction of the pressure element, are wedge-shaped and are placed against and upon each other so that together they constitute a substantially rectangular pillow between the strip 16 and the 30 supporting table 13.
• the rubber bellows are preferably made of fabric-reinforced rubber, or of material having equivalent properties.
• a fixing element 37 in the shape of a plate.
• One mar ⁇ ginal part 38 of the fixing element is integrally connected with the supporting table 13(33), and the other marginal part 39 of the fixing element is integrally connected with the strip 16.
• FIG. 3 the fixing which is on the left in Fig. 2 is shown on a c larger scale.
• Fig. 3 is also shown the left margin of the lower bellows 20, fixed in place with a screwed joint to the supporting table.
• the reference numeral 40 indicates a clamp of plastic or metal and numeral 41, a screw.
• Th e fixing element may likewise be made of fabric-reinforced rubber, but it may also be made of sheet metal.
• interrupted lines schematically indicate nipples 42,42' for introducing and carrying off compressed air to the bellows • «5 19,20.
• the nipples are preferably placed on the respective end of the bellows.
• the surfaces of the bellows adjoining the underside 5 surface of the strip 16 and the top surface of the supporting heel 33 have been affixed to the respective surface. This may be done with mechanical junctures or by cementing the bellows to the res ⁇ pective surface.
• the strip 31;33 respectively the supporting table 44;45, partly embrace each other so that the strip 31;32 has only limited mobility relative to the supporting 5 table 44;45. Due to this embodiment there is no need for any fixing element of the type just described in connection with Fig. 2.
• a further bellows 46 has been provided which holds within itself the two bellows 21 and 22 already mentioned. These inner bellows 21,22 are fixed to the outer bellows 46, which in turn is preferentially affixed to the strip 31, respectively to the supporting table 44, by means of mechanical junctures or by cementing.
• a duct serving introduction and evacuation of compressed air is provided to each inner bellows 21,22.
• the strip is restrictedly displaceable through a very short distance in the left/right direction in Fig. 4.
• the strip is further restrictedly displaceable upward/downward in Fig. 4, though through a longer distance than in the left/right jc direction.
• the free play which is present between the strip and the supporting table is merely con ⁇ ducive to easier upward/downward displacement and inclined pos ⁇ itioning of the top surface of the strip.
• a duct 49 between the outer bellows and free atmosphere must be provided.
• the ends of the outer bellows may be open.
• Fig. 5 is shown an embodiment equivalent to that of Fig. 4,
• the strip is restrictedly dis ⁇ placeable relative to the supporting table.
• Ducts 52,53 have been 30 provided for supplying and carrying off compressed air.
• the bellows 21,22,46,23,24 are preferably made of fabric-reinforced rubber material-.
• every rubber bellows 19 has a length consistent with the total length of the strips 16.
• one bellows or both bellows carrying a strip 16 may consist of two or more bellows 19',19'', 19''' located after each other in their longitudinal direction, so that the bellows 19',19", 19"' in combination constitute a force- supplying member having a length consistent with the total length of the strips 16, see Fig. 7.
• every bellows 19',19", 1 " ' is provided with a nipple for supplying and letting off compressed air.
• Each bellows 19',1 ",19"' is individually adjus ⁇ table.
• This embodiment implies that it is even possible to control the pressure profile across the width of the wire 7.
• a long bellows extending over the entire width of the wire may be subdivided into different sections.
• the bellows may have other shapes and cover a greater or smaller part of the underside of the strips and of the top surface of the supporting table as seen in section according to Figs 2, 3 and 4. Furthermore, the bellows may be made of ma ⁇ terials other than have been mentioned in the foregoing and which are suitable in the application in hand.
• the fixing element 37 may constitute a spring element in case it is made of metal.

Landscapes

• Paper (AREA)
• Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
• Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
• Sewing Machines And Sewing (AREA)
• Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
• Inspection Of Paper Currency And Valuable Securities (AREA)
• Devices For Checking Fares Or Tickets At Control Points (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20369499

Family Applications (1)

Country Status (13)

Cited By (7)

Families Citing this family (11)

Citations (3)

Family Cites Families (4)

• 1987
  • 1987-09-07 SE SE8703468A patent/SE456590B/sv unknown
• 1988
  • 1988-08-22 EP EP88113618A patent/EP0306759B1/en not_active Expired - Lifetime
  • 1988-08-22 ES ES198888113618T patent/ES2025747T3/es not_active Expired - Lifetime
  • 1988-08-22 AT AT88113618T patent/ATE66027T1/de not_active IP Right Cessation
  • 1988-08-22 DE DE8888113618T patent/DE3864105D1/de not_active Expired - Fee Related
  • 1988-09-06 CA CA000576547A patent/CA1335632C/en not_active Expired - Fee Related
  • 1988-09-06 FI FI884109A patent/FI90572C/fi not_active IP Right Cessation
  • 1988-09-06 AU AU23031/88A patent/AU2303188A/en not_active Abandoned
  • 1988-09-06 CH CH1579/89A patent/CH676257A5/de not_active IP Right Cessation
  • 1988-09-06 BR BR888807192A patent/BR8807192A/pt unknown
  • 1988-09-06 WO PCT/FI1988/000142 patent/WO1989002499A1/en unknown
  • 1988-09-07 KR KR1019880011537A patent/KR970008599B1/ko not_active IP Right Cessation
  • 1988-09-07 JP JP63224367A patent/JP2691913B2/ja not_active Expired - Lifetime

Patent Citations (3)

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