EP0287836B1 - Papiermaschinensieb aus einem doppellagigen Gewebe - Google Patents

Papiermaschinensieb aus einem doppellagigen Gewebe Download PDF

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Publication number
EP0287836B1
EP0287836B1 EP88104766A EP88104766A EP0287836B1 EP 0287836 B1 EP0287836 B1 EP 0287836B1 EP 88104766 A EP88104766 A EP 88104766A EP 88104766 A EP88104766 A EP 88104766A EP 0287836 B1 EP0287836 B1 EP 0287836B1
Authority
EP
European Patent Office
Prior art keywords
cross threads
threads
paper
cross
paper side
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88104766A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0287836A1 (de
Inventor
Fritz Vöhringer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
F Oberdorfer & Co KG Industriegewebe-Technik GmbH
Original Assignee
F Oberdorfer & Co KG Industriegewebe-Technik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by F Oberdorfer & Co KG Industriegewebe-Technik GmbH filed Critical F Oberdorfer & Co KG Industriegewebe-Technik GmbH
Priority to AT88104766T priority Critical patent/ATE58404T1/de
Publication of EP0287836A1 publication Critical patent/EP0287836A1/de
Application granted granted Critical
Publication of EP0287836B1 publication Critical patent/EP0287836B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths

Definitions

  • the invention relates to a paper machine screen made of a double-layer fabric according to the preamble of claim 1.
  • paper machine screens are required, which have the task of dewatering a fiber-filler suspension and thereby forming a wet-strength paper web which can be transported to the press section on the screen.
  • the screen must meet certain requirements with regard to its water permeability or its fiber retention, as well as its surface quality and stability, which have increased continuously in the course of the past development of such screens, due to the efforts of the papermakers to improve the paper qualities. For this reason, paper manufacturers are forced to adapt their products to these growing requirements, i.e. to continuously develop paper machine screens with regard to the properties mentioned.
  • FIG. 6 shows the course of a longitudinal thread 3 of a known double-layer sieve, which is equipped with two paper-side transverse thread groups E and F, which differ in the length of their outer floats.
  • the paper-side transverse threads are separated from one another at a distance.
  • the number of cross threads 4 on the running side is very small because of the comparatively large distance.
  • the object of the invention is therefore to design the paper machine sieve of the type mentioned so that when increasing the number of paper-side transverse threads none of the above. Disadvantages occur, especially no unacceptable reductions in the stability of the screen and markings in the paper.
  • the sieve according to the invention can have an at least 15% higher paper-side and running-side number of quills with the same length of thread / cm. cm.
  • the screen according to the invention can also have an at least 80% higher paper-side cross thread number / cm with the same number of longitudinal threads / cm.
  • the paper machine screen according to the invention shown in FIG. 3 consists of a double-layer fabric with a fabric repeat of seven longitudinal threads and forty-two transverse threads. The course of two adjacent longitudinal threads 6 and 7 is shown, which are offset from one another by twelve or sixteen paper-side transverse threads.
  • the sieve also has transverse threads 8, 9, 10, 11, 12, 13, which differ in terms of their diameter and / or material properties and their float lengths in that the three transverse threads 8, 9, 10 each have a different transverse thread group A, B, C belong to, while of the transverse threads 11, 12 and 13, the threads 11 and 13 belong to the transverse thread group B and the threads 12 belong to the transverse thread group A or C, which, as stated, differ with regard to the thread diameter.
  • three paper-side transverse thread groups A, B and C occur within the repeat, and each of the longitudinal threads 6 and 7 crosses three successive paper-side transverse threads 8, 9, 10, then passes under three successive paper-side transverse threads 11, 12, 13 and then crosses over again the following three paper-side transverse threads 8, 9, 10, before it then runs between the paper-side and the running-side transverse thread sets and thereby integrates two non-successive running-side transverse threads 14, which can also have a different position.
  • the paper-side transverse threads 8, 9, 10 have a very dense position, which means that they can touch one another.
  • Each of these three transverse threads differs from the other two in the length of its floats and, as already mentioned, in advantageous configurations in diameter and / or in its material.
  • the traversed transverse threads 11, 12, 13 following these three transverse threads are separated from one another and each belong to only two different thread groups, the two transverse threads 11 and 13 being identical in terms of their diameter and in terms of their material and / or their diameter of can also distinguish the third cross thread 12.
  • each longitudinal thread can incorporate two non-consecutive running transverse threads, each of these transverse threads being bound by only one longitudinal thread within the repeat.
  • the longitudinal threads are bound twice in the lower transverse thread layer, as a result of which an outwardly directed force component is generated between the two connection points denoted by 15, which presses the cross threads 5 lying between the two connection points outwards, if the sieve is placed under longitudinal tension during the fixing process.
  • An excellent transverse thread runner is created in this meadow.
  • Fig. 4 illustrates on a section of the screen according to the invention, seen from the paper side, the difference between the float lengths of the three transverse thread groups A, B, C and their frequency and distribution.
  • the number of transverse threads can be reduced in the usual way and the desired permeability can thus be achieved.
  • the number of diagonals / cm 2 formed from longitudinal or transverse floats on the paper side or their distance is a measure of the marking risk. The larger the diagonal distance and thus the smaller the number of diagonals, the higher the probability of the undesired sieve markings occurring.
  • the paper-side transverse line numbers / cm are considerably smaller in the known sieves than in the sieve according to the invention, the stability of the sieve according to the invention being able to be increased considerably in comparison with the finest sieves of the known type, so that the enormous tension and stresses occurring in the operating state on the paper machine Wear loads are borne much longer.
  • the number of transverse threads per cm on the paper should expediently be at least 60% of the number of longitudinal threads per cm.

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  • Paper (AREA)
  • Sewing Machines And Sewing (AREA)
  • Materials For Medical Uses (AREA)
  • Dental Preparations (AREA)
EP88104766A 1987-04-22 1988-03-24 Papiermaschinensieb aus einem doppellagigen Gewebe Expired - Lifetime EP0287836B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88104766T ATE58404T1 (de) 1987-04-22 1988-03-24 Papiermaschinensieb aus einem doppellagigen gewebe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873713510 DE3713510A1 (de) 1987-04-22 1987-04-22 Papiermaschinensieb aus einem doppellagigen gewebe
DE3713510 1987-04-22

Publications (2)

Publication Number Publication Date
EP0287836A1 EP0287836A1 (de) 1988-10-26
EP0287836B1 true EP0287836B1 (de) 1990-11-14

Family

ID=6326085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88104766A Expired - Lifetime EP0287836B1 (de) 1987-04-22 1988-03-24 Papiermaschinensieb aus einem doppellagigen Gewebe

Country Status (9)

Country Link
US (1) US4998568A (fi)
EP (1) EP0287836B1 (fi)
JP (1) JPH01183591A (fi)
AT (1) ATE58404T1 (fi)
CA (1) CA1312489C (fi)
DE (2) DE3713510A1 (fi)
ES (1) ES2018588B3 (fi)
FI (1) FI89522B (fi)
NO (1) NO166242C (fi)

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Also Published As

Publication number Publication date
ES2018588B3 (es) 1991-04-16
NO881736D0 (no) 1988-04-21
CA1312489C (en) 1993-01-12
NO166242B (no) 1991-03-11
EP0287836A1 (de) 1988-10-26
FI89522B (fi) 1993-06-30
DE3861047D1 (de) 1990-12-20
NO881736L (no) 1988-10-24
JPH01183591A (ja) 1989-07-21
NO166242C (no) 1991-06-19
FI881875A0 (fi) 1988-04-21
FI881875A (fi) 1988-10-23
ATE58404T1 (de) 1990-11-15
US4998568A (en) 1991-03-12
DE3713510A1 (de) 1988-11-10

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