EP0444587A1 - Crochet et séparateur pourvu d'un tel crochet pour prendre et isoler des fils - Google Patents

Crochet et séparateur pourvu d'un tel crochet pour prendre et isoler des fils Download PDF

Info

Publication number
EP0444587A1
EP0444587A1 EP91102789A EP91102789A EP0444587A1 EP 0444587 A1 EP0444587 A1 EP 0444587A1 EP 91102789 A EP91102789 A EP 91102789A EP 91102789 A EP91102789 A EP 91102789A EP 0444587 A1 EP0444587 A1 EP 0444587A1
Authority
EP
European Patent Office
Prior art keywords
hook
thread
threads
recess
separator
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.)
Granted
Application number
EP91102789A
Other languages
German (de)
English (en)
Other versions
EP0444587B1 (fr
Inventor
Hans-Eugen Häcker
Klaus Esser
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.)
Novatech GmbH Siebe und Technologie fuer Papier
Original Assignee
Herman Wangner GmbH and Co KG
Novatech GmbH Siebe und Technologie fuer Papier
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 Herman Wangner GmbH and Co KG, Novatech GmbH Siebe und Technologie fuer Papier filed Critical Herman Wangner GmbH and Co KG
Publication of EP0444587A1 publication Critical patent/EP0444587A1/fr
Application granted granted Critical
Publication of EP0444587B1 publication Critical patent/EP0444587B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D3/00—Woven fabrics characterised by their shape
    • D03D3/04—Endless fabrics
    • 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
    • D21F1/0054—Seams thereof

Definitions

  • the invention relates to a circuit board and a separator containing such a circuit board for detecting and separating threads held in a row.
  • the board has a hook-shaped recess.
  • Such separators are part of a seam weaving machine for the continuous making of sheet forming sieves for paper machines.
  • the arrangement of the threads is a so-called magazine band, in which the longitudinal threads of the sheet forming screen are held by weaving with transverse threads.
  • the longitudinal threads have to be taken out of the magazine band one by one, i.e. be isolated.
  • the longitudinal threads of such sheet forming screens in most cases have diameters in the range from approximately 0.15 to 0.22 mm.
  • the board has a front edge facing the array.
  • the hook-shaped recess forms a base edge set back from the front edge, against which the thread to be separated rests before it is gripped and held by the hook-shaped recess by moving the plate.
  • the separator contains a frame in which at least one plate for grasping the foremost thread of a line is guided and can be displaced by a drive device.
  • each plate is designed with one or two hooks adapted to the diameter of the thread to be detected.
  • the recess is semicircular, so that the thread lies with its half circumference in the hook-shaped recess.
  • the adaptation to the thread diameter must be very precise, on the one hand to achieve a secure grasping of the foremost thread of the line to be separated and, on the other hand, to prevent the subsequent thread from being pierced and carried away.
  • a certain error rate is inevitable.
  • the error can consist in the fact that the foremost thread is not detected or that not only the foremost thread but also the subsequent thread is detected. Every error leads to the seam machine coming to a standstill.
  • the thread to be tapped is detected in each case that it is pressed against the frame by the hook, the thread to be tapped in the separators according to DE-U-87 13 074, DE-A-37 24 822 and EP-A-301 174 between the mutually directed hooks of at least two Printed circuit boards, one hook being adapted to the diameter of the thread to be separated and the other hook interacting therewith being approximately half the size. The smaller hook sticks about half the width into the thread and pushes it into the larger hook. In the case of boards with hooks, the form fit can only extend to a maximum of half the circumference. Threads that are firmly integrated in the sequence cannot therefore be separated with certainty.
  • sinkers in which the hook is replaced by a piercing needle which pierces a thread to grasp it.
  • a piercing needle which pierces a thread to grasp it.
  • the thread will be pierced and split.
  • the invention has for its object to provide a circuit board and a separator through which the error rate continues is reduced.
  • this object is achieved in that the hook-shaped recess of the board has a depth in the direction of movement of the board which is greater than half the width of the recess.
  • the greater depth of the recess allows the thread to be gripped and held particularly securely. Surprisingly, it has been found that there is no risk that the subsequent thread will also be caught.
  • the width of the hook-shaped recess can be 20% larger to 30% smaller than the diameter of the thread.
  • the depth of the hook-shaped recess also does not need to be exactly matched to the thread diameter. Due to the greater depth of the hook-shaped recess, the thread to be separated is positively grasped in each case.
  • the hook tip is preferably rounded off with a radius of approximately 1/10 of the width of the hook-shaped recess. This further reduces the risk of the subsequent thread being pierced.
  • a deflecting edge preferably extends at an angle of more than 15 ° to the direction of movement of the circuit board from the hook tip to the front edge.
  • the subsequent thread is separated from the thread to be separated by this deflecting edge.
  • the angle of the deflector edge can also be significantly larger than 15 °, but should be less than 90 °.
  • the circuit board according to the invention and the separator according to the invention correspond to those according to EP-A-301 174.
  • Two types of separator are common.
  • the frame of the separator has two legs which delimit between them a mouth-like opening which is somewhat wider than the thickness of the line-up of threads.
  • the separator is moved so far that the base edge of the board lies with a set, defined force on the foremost thread to be separated.
  • the hook-shaped recess grasps the foremost thread of the line-up and presses it against the upper or lower leg of the mouth-like opening.
  • the thread to be separated is held between two or three boards.
  • it is expediently gripped on one side by the hook-shaped recesses of two boards and on the other side by the hook-shaped recess of an intermediate board. This procedure is described in detail in EP-A-301 174 in connection with FIG. 5.
  • the middle board of the type according to the invention has a hook-shaped recess, while the two outer boards engaging from the opposite side can only have one step.
  • the hook-shaped recess of the middle plate, which contains the thread is closed as it were by the steps of the two outer plates, so that the thread is completely locked in.
  • the hook-shaped recesses or steps approach the thread to be separated and take hold of it in the position predetermined by the weave.
  • the thread is then not lifted out of the row in the course of the tensioning stroke and is also not pressed into the offset structure of the transverse threads of the row.
  • the pressing of the thread to be separated into the offset structure of the transverse threads in the first design of the separator sometimes has the result is that the thread to be separated does not come loose from the weave of the stringing during the separating stroke.
  • Another advantage of the second type of separator is that rows can be processed with a very firm bond.
  • the board according to the invention and the separator according to the invention are particularly suitable for sewing double-layer fabrics.
  • the separator 20 Since the separator 20 is otherwise of a conventional type, only a part of the circuit board 10 and the mouth-like opening 11 of the separator 20 are shown in the figures. Furthermore, the three foremost threads 1, 2 and 3 of a line are shown. The board 10 is shown in each case in the position which it occupies at the end of a clamping stroke, wherein it has grasped the foremost thread of the alignment.
  • the circuit board has a front edge 12 in which there is a lower hook-shaped recess 13 and an upper hook-shaped recess 14, each with a hook tip 17.
  • the recesses 13, 14 create a base edge 15 set back from the front edge 12.
  • the hook-shaped recesses 13, 14 are connected to the front edge 12 by a deflecting edge 16.
  • the width X of the recesses 13, 14 is in a range from 20% larger to 30% smaller than the diameter of the threads 1, 2, 3, so that a board 10 can be used for threads that vary in diameter up to 50% . If the width X of the hook-shaped recess 13, 14 is larger than the thread diameter, the recess 13, 14 can easily accommodate the thread. There is no danger that the subsequent thread 2 will also be received by the recess 13, 14, since the thread 2 is rejected by the deflecting edge 16 and the threads 1 and 2 are separated. If the thread diameter is larger than the width X of the recess 13, 14, then either the thread 1 is compressed in its cross section or the hook tip 17 penetrates somewhat into the material of the thread 1. In both cases, the thread 1 is reliably gripped by the recess 13, 14.
  • the hook tip 17 can also be rounded with a radius which can be up to 1/10 of the width X.
  • Fig. 2 shows such a circuit board 10 with a rounded hook tip 17 '.
  • the hook tip 17 ′ dips into the guide slot 18 at the end of the tensioning stroke, in which the plate 10 runs. In the illustration in FIG. 2 there is therefore an overlap between the hook tip 17 ′ and the upper leg of the opening 11.
  • the deflecting edge at an angle of approximately 30 ° to the clamping stroke movement direction of the circuit board 10 3, this angle is significantly larger in the embodiment of FIG. 3 and is approximately 80 ° there. It can happen that the subsequent thread 2 is clamped during the tension stroke between the deflecting edge 16 'and the leg of the opening 11. However, during the subsequent separating stroke, which is directed to the right in the illustration of the figures, the thread 2 is not taken along, so that here too the first thread 1 is reliably separated from the subsequent threads 2, 3.
  • the deflecting edge 16 ′′ is curved upward toward the hook tip 17 ′′.
  • the separator 20 shown in the drawing is of the first type mentioned at the outset, in which the thread is clamped between the hook of a circuit board 10 and one leg of the mouth-like opening 11.
  • the circuit board according to the invention can also be used in separators which contain a plurality of circuit boards and in which the foremost thread of the line-up is clamped between the hooks of two circuit boards.
  • Such separators are used in particular in multi-layer paper machines.
  • Each board can have one or two hook-shaped recesses 13, 14. In the case of several hook-shaped recesses, these can have different dimensions.
  • the boards are made from spring steel sheet with a thickness of 0.10 to 0.35 mm and cut out by wire EDM.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Paper (AREA)
  • Rolling Contact Bearings (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
EP91102789A 1990-02-26 1991-02-26 Crochet et séparateur pourvu d'un tel crochet pour prendre et isoler des fils Expired - Lifetime EP0444587B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9002278U DE9002278U1 (de) 1990-02-26 1990-02-26 Platine für einen Separator zum Erfassen und Vereinzeln von Fäden
DE9002278U 1990-02-26

Publications (2)

Publication Number Publication Date
EP0444587A1 true EP0444587A1 (fr) 1991-09-04
EP0444587B1 EP0444587B1 (fr) 1995-05-17

Family

ID=6851414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102789A Expired - Lifetime EP0444587B1 (fr) 1990-02-26 1991-02-26 Crochet et séparateur pourvu d'un tel crochet pour prendre et isoler des fils

Country Status (7)

Country Link
US (1) US5134759A (fr)
EP (1) EP0444587B1 (fr)
JP (1) JPH04214493A (fr)
AT (1) ATE122736T1 (fr)
CA (1) CA2036980A1 (fr)
DE (2) DE9002278U1 (fr)
FI (1) FI94539C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10362819B2 (en) 2015-12-22 2019-07-30 Nike, Inc. Low-profile edge pocket

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100202754B1 (ko) * 1990-11-14 1999-06-15 에스 메이어; 알 퓨러 경사의 자동 통경기
DE20105091U1 (de) * 2001-03-23 2002-09-05 Wangner Finckh GmbH & Co. KG, 72760 Reutlingen Spannzange für Nahtwebmaschinen
US6634068B1 (en) * 2002-04-24 2003-10-21 Astenjohnson, Inc. Apparatus for preparing a fabric for seaming

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8122450U1 (de) * 1981-07-30 1983-01-13 Fa. F. Oberdorfer, 7920 Heidenheim Vorrichtung zum fortlaufenden vereinzeln von in einer aufreihung gehaltenen faeden
DE3712169A1 (de) * 1987-04-10 1988-10-27 Oberdorfer Fa F Fadentrenner fuer nahtmaschinen, insbesondere zum nahten von entwaesserungssieben, trockensieben, filzen u. dgl.
EP0289640A1 (fr) * 1987-05-07 1988-11-09 F. Oberdorfer GmbH & Co. KG Industriegewebe-Technik Séparateur de fils pour machine à réunir les extrémités de toiles pour machines à papier
EP0301174A1 (fr) * 1987-07-27 1989-02-01 NOVATECH GmbH Siebe und Technologie für Papier Séparateur pour isoler des fils rangés côte à côte

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US977166A (en) * 1906-01-15 1910-11-29 Barber Colman Co Thread-selecting device.
US1207249A (en) * 1915-01-27 1916-12-05 Max Wenzel Apparatus for separating the foremost thread in the lease of textile warps.
DE536421C (de) * 1928-10-04 1931-10-23 Ulrich Bischof Fadenknuepfvorrichtung
US2313195A (en) * 1940-05-23 1943-03-09 Fleischer Svend Sigur Christie Thread isolating device
US2413881A (en) * 1945-04-12 1947-01-07 Zellweger Uster Ag Separating device for leased warp threads in weaving-preparing machines
DE1285957B (de) * 1961-07-05 1968-12-19 Knotex Maschb Gmbh Einstellbare Abteilnadel fuer Webkettenknuepf- und Webketteneinziehmaschinen od. dgl.
US4581794A (en) * 1984-03-07 1986-04-15 Asten Group Inc. Automatic seaming machine for fabric belts
DE3507450A1 (de) * 1985-03-02 1986-09-04 Thomas Josef Heimbach GmbH & Co, 5160 Düren Vorrichtung zum ausriffeln von faeden aus einem gewebe
DE3714517A1 (de) * 1987-04-30 1988-11-17 Oberdorfer Fa F Fadentrenner fuer nahtmaschinen, insbesondere zum nahten von entwaesserungssieben, trockensieben, filzen u. dgl.
DE8903454U1 (de) * 1989-03-20 1990-07-26 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Separator für Nahtmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8122450U1 (de) * 1981-07-30 1983-01-13 Fa. F. Oberdorfer, 7920 Heidenheim Vorrichtung zum fortlaufenden vereinzeln von in einer aufreihung gehaltenen faeden
DE3712169A1 (de) * 1987-04-10 1988-10-27 Oberdorfer Fa F Fadentrenner fuer nahtmaschinen, insbesondere zum nahten von entwaesserungssieben, trockensieben, filzen u. dgl.
EP0289640A1 (fr) * 1987-05-07 1988-11-09 F. Oberdorfer GmbH & Co. KG Industriegewebe-Technik Séparateur de fils pour machine à réunir les extrémités de toiles pour machines à papier
EP0301174A1 (fr) * 1987-07-27 1989-02-01 NOVATECH GmbH Siebe und Technologie für Papier Séparateur pour isoler des fils rangés côte à côte

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10362819B2 (en) 2015-12-22 2019-07-30 Nike, Inc. Low-profile edge pocket
US11071339B2 (en) 2015-12-22 2021-07-27 Nike, Inc. Low-profile edge pocket

Also Published As

Publication number Publication date
JPH04214493A (ja) 1992-08-05
DE9002278U1 (de) 1991-07-25
FI94539C (fi) 1995-09-25
FI910917L (fi) 1991-08-27
FI94539B (fi) 1995-06-15
CA2036980A1 (fr) 1991-08-27
EP0444587B1 (fr) 1995-05-17
FI910917A0 (fi) 1991-02-26
US5134759A (en) 1992-08-04
DE59105481D1 (de) 1995-06-22
ATE122736T1 (de) 1995-06-15

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