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EP0282874B1 - Heald frame device for leno selvedges - Google Patents

Heald frame device for leno selvedges Download PDF

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Publication number
EP0282874B1
EP0282874B1 EP88103567A EP88103567A EP0282874B1 EP 0282874 B1 EP0282874 B1 EP 0282874B1 EP 88103567 A EP88103567 A EP 88103567A EP 88103567 A EP88103567 A EP 88103567A EP 0282874 B1 EP0282874 B1 EP 0282874B1
Authority
EP
European Patent Office
Prior art keywords
shaft
heald
heddle support
leno
heddle
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
EP88103567A
Other languages
German (de)
French (fr)
Other versions
EP0282874A3 (en
EP0282874A2 (en
Inventor
Heinrich Josef Klöcker
Werner Wanning
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.)
Kloecker Entwicklungs GmbH
Original Assignee
Kloecker Entwicklungs 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 Kloecker Entwicklungs GmbH filed Critical Kloecker Entwicklungs GmbH
Priority to AT88103567T priority Critical patent/ATE74975T1/en
Publication of EP0282874A2 publication Critical patent/EP0282874A2/en
Publication of EP0282874A3 publication Critical patent/EP0282874A3/en
Application granted granted Critical
Publication of EP0282874B1 publication Critical patent/EP0282874B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C7/00—Leno or similar shedding mechanisms

Definitions

  • the invention relates to a heald frame device suitable for achieving a leno selvedge with lifting strands attached to opposing heddle support rails and a half heddle which is attached to a half shaft which is mutually controlled by the heddle support rails (see AT-A-141409).
  • a heald frame suitable for a leno selvedge is known to consist of two lifting shafts equipped with heddle support rails, which alternately, i.e. back and forth, are moved, and the associated half shaft.
  • the lifting strands, which guide the upright threads, are lined up on the heddle support rails.
  • the half strand, which guides the leno thread, is pushed onto the half shaft. Since the half shaft is controlled by the heddle support rail, reversal of the movement of the half heddles takes place in the crossing position of the opposing heddle support rails, so that the half heddles only carry out half a stroke in comparison to the heddle support rail. As a result, the leno thread is alternately lifted into the compartment formed by the upright thread.
  • the control of the half shaft with the attached half heddle is carried out by a so-called leno yoke, which essentially represents a frame which is in contact with the heddle support rails and is carried by a heddle support rail, whereby a spring is tensioned. If the heddle support rail runs back, the leno yoke remains connected to the heddle support rail, since the leno yoke is under spring tension. In the crossing position of the heddle support rails, the half shaft and thus the half heddles are carried along by the other heddle support rail.
  • the object of the invention is therefore to create a heald frame device which is suitable for a leno selvedge and which avoids these disadvantages.
  • This is achieved according to the invention in that the half shaft is magnetically connected to the heddle support rail.
  • the design is such that the half-shaft has a slide provided with magnets, which is guided on rods which are connected to the synchronous strand support rails.
  • This magnetic connection and the arrangement of the half-shaft on the rods ensure that the half-shaft and thus also the half-strand attached to it are properly guided.
  • any displacement of the half-shaft is possible.
  • the half shaft on the rod is also transported downwards. If the direction of movement of the heddle support rail reverses, then the half-shaft is taken up again as a result of the magnetic connection to the heddle support rail until the other heddle support rail brings about the opposite movement of the half-shaft again.
  • the design according to the invention also ensures that the half shaft, because of the magnetic coupling with the heddle support rails, only runs through half the stroke in comparison to the entire stroke of the heddle support rail. This measure significantly reduces wear on the lifting strands.
  • the heald frame device consists of the two lifting shafts 1 and 2, which perform an opposite movement using known means (not shown).
  • the heddle support rails 3 and 4 are arranged on the lifting shafts and are connected to the lower heddle support rails 3a and 4a by shaft supports (not shown).
  • a half shaft 7 is attached via clamping pieces 10 and 10a.
  • the half shaft 7 has a sliding piece 8 which is guided on the rods 9 and 9a provided with the clamping pieces 10, 10a, which are connected to the heddle support rails.
  • the half-shaft 7 is magnetically connected by the slider 8 to the heddle support rail 4, specifically according to the exemplary embodiment by the clamping piece 10, by incorporating corresponding magnets 11 in the slider 8.
  • the rods can be non-circular.
  • 10 guide means can be provided on the slider 8 and on the opposite clamping piece, which ensure a perfect position of the half-shaft.
  • a wedge 12a can be provided on the slider 8 and a corresponding recess 13 can be provided on the clamping piece 10.
  • the half-shaft 7 also carries out a corresponding alternating movement, so that the half-strand 12, which is attached to the half-shaft, takes the leno thread guided in the half-strand 12 shortly before the closed shed position, which has the consequence that the leno thread is passed once to the left of the upright thread and once to the right of the upright thread, so that a binding is achieved.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

Heald frame device for leno selvedges, comprising lifting healds mounted on opposed shaft staves and a half-heald which is mounted on a half-shaft which is controlled alternately by the shaft staves, the half-shaft (7) being connected to the shaft stave (3 or 4) by magnetic means. <IMAGE>

Description

Die Erfindung betrifft eine zur Erzielung einer Dreherkante geeignete Webschaftvorrichtung mit auf gegenläufigen Litzentragschienen angebrachten Hebelitzen sowie einer Halblitze, die auf einem Halbschaft angebracht ist, der wechselseitig von den Litzentragschienen gesteuert wird (siehe AT-A-141409).The invention relates to a heald frame device suitable for achieving a leno selvedge with lifting strands attached to opposing heddle support rails and a half heddle which is attached to a half shaft which is mutually controlled by the heddle support rails (see AT-A-141409).

Ein für eine Dreherkante geeigneter Webschaft besteht bekanntlich aus zwei mit Litzentragschienen ausgerüsteten Hebeschäften, die wechselweise, d.h. hin- und hergehend, bewegt werden, und dem dazugehörigen Halbschaft. Auf die Litzentragschienen sind die Hebelitzen aufgereiht, welche die Steherfäden führen. Auf den Halbschaft ist die Halblitze aufgeschoben, die den Dreherfaden führt. Da der Halbschaft von der Litzentragschiene gesteuert wird, erfolgt jeweils in der Kreuzungslage der gegenläufigen Litzentragschienen eine Umsteuerung der Bewegung der Halblitze, so daß die Halblitze im Vergleich zur Litzentragschiene nur einen halben Hub ausführt. Dadurch wird der Dreherfaden in das durch die Steherfäden gebildete Fach jeweils wechselweise eingehoben.A heald frame suitable for a leno selvedge is known to consist of two lifting shafts equipped with heddle support rails, which alternately, i.e. back and forth, are moved, and the associated half shaft. The lifting strands, which guide the upright threads, are lined up on the heddle support rails. The half strand, which guides the leno thread, is pushed onto the half shaft. Since the half shaft is controlled by the heddle support rail, reversal of the movement of the half heddles takes place in the crossing position of the opposing heddle support rails, so that the half heddles only carry out half a stroke in comparison to the heddle support rail. As a result, the leno thread is alternately lifted into the compartment formed by the upright thread.

Bei einem bekannten Webschaft dieser Art erfolgt die Steuerung des Halbschaftes mit der daran angebrachten Halblitze durch ein sogenanntes Dreherjoch, welches im wesentlichen ein Gestell darstellt, das mit den Litzentragschienen in Berührung steht und von jeweils einer Litzentragschiene mitgenommen wird, wobei sich eine Feder spannt. Läuft die Litzentragschiene zurück, dann bleibt das Dreherjoch mit der Litzentragschiene in Verbindung, da das Dreherjoch unter Federspannung steht. In der Kreuzungslage der Litzentragschienen erfolgt die Mitnahme des Halbschaftes und damit der Halblitze durch die jeweils andere Litzentragschiene.In a known heald frame of this type, the control of the half shaft with the attached half heddle is carried out by a so-called leno yoke, which essentially represents a frame which is in contact with the heddle support rails and is carried by a heddle support rail, whereby a spring is tensioned. If the heddle support rail runs back, the leno yoke remains connected to the heddle support rail, since the leno yoke is under spring tension. In the crossing position of the heddle support rails, the half shaft and thus the half heddles are carried along by the other heddle support rail.

Die Verwendung eines Drehjoches ist aber deshalb nachteilig, weil es nicht ohne weiteres an eine beliebige Stelle der Litzentragschiene verschoben werden kann, was zum Beispiel bei unterschiedlich breiten Geweben erforderlich ist.However, the use of a rotary yoke is disadvantageous because it cannot be easily moved to any position on the heddle support rail, which is necessary, for example, in the case of fabrics of different widths.

Der Erfindung liegt daher die Aufgabe zugrunde, eine für eine Dreherkante geeignete Webschaftvorrichtung zu schaffen, die diese Nachteile vermeidet. Das wird erfindungsgemäß dadurch erreicht, daß der Halbschaft magnetisch mit der Litzentragschiene verbunden ist.The object of the invention is therefore to create a heald frame device which is suitable for a leno selvedge and which avoids these disadvantages. This is achieved according to the invention in that the half shaft is magnetically connected to the heddle support rail.

Im einzelnen ist die Ausbildung dabei so getroffen, daß der Halbschaft ein mit Magneten versehenes Gleitstück aufweist, das auf Stäben geführt ist, welche mit den gleichlaufenden Litzentragschienen verbunden sind. Durch diese magnetische Verbindung und die Anordnung des Halbschaftes auf den Stäben ist eine einwandfreie Führung des Halbschaftes und damit auch der daran befestigten Halblitze erreicht Außerdem ist eine beliebige Verschiebbarkeit des Halbschaftes möglich.In detail, the design is such that the half-shaft has a slide provided with magnets, which is guided on rods which are connected to the synchronous strand support rails. This magnetic connection and the arrangement of the half-shaft on the rods ensure that the half-shaft and thus also the half-strand attached to it are properly guided. In addition, any displacement of the half-shaft is possible.

Macht die Litzentragschiene beispielsweise eine nach unten gerichtete Bewegung, dann wird der Halbschaft auf dem Stab mit nach unten transportiert. Dreht sich die Bewegungsrichtung der Litzentragschiene um, dann wird der Halbschaft infolge der magnetischen Verbindung mit der Litzentragschiene wieder mit nach oben genommen, bis die andere Litzentragschiene die gegenläufige Bewegung des Halbschaftes wieder bewerkstelligt.If, for example, the heddle support rail makes a downward movement, the half shaft on the rod is also transported downwards. If the direction of movement of the heddle support rail reverses, then the half-shaft is taken up again as a result of the magnetic connection to the heddle support rail until the other heddle support rail brings about the opposite movement of the half-shaft again.

Durch die erfindungsgemäße Gestaltung wird auch erreicht, daß der Halbschaft wegen der magnetischen Kupplung mit den Litzentragschienen nur den halben Hub im Vergleich zum gesamten Hub der Litzentragschiene durchläuft. Der Verschleiß an den Hebelitzen wird durch diese Maßnahme entscheidend vermindert.The design according to the invention also ensures that the half shaft, because of the magnetic coupling with the heddle support rails, only runs through half the stroke in comparison to the entire stroke of the heddle support rail. This measure significantly reduces wear on the lifting strands.

Bedingt durch den halben Hub der Halblitze wird erreicht, daß die Halblitze nicht bis zum Anschlag der Hebelitze durchläuft und deshalb an diesen Anschlag nicht anschlägt.Due to the half stroke of the half strand, it is achieved that the half strand does not pass through to the stop of the lifting strand and therefore does not strike this stop.

In der Zeichnung ist eine beispielsweise Ausführungsform dargestellt:

Fig. 1
zeigt die Webschaftvorrichtung von vorn;
Fig. 2
zeigt eine Seitenansicht im Schnitt gemäß der Linie II-II;
Fig. 3
zeigt eine Seitenansicht im Schnitt gemäß der Linie III-III;
Fig. 4 und 5
zeigen perspektivische Darstellungen des von den Litzentragschienen gesteuerten Halbschaftes.
An example of an embodiment is shown in the drawing:
Fig. 1
shows the heald frame device from the front;
Fig. 2
shows a side view in section along the line II-II;
Fig. 3
shows a side view in section along the line III-III;
4 and 5
show perspective views of the half shaft controlled by the heddle support rails.

Wie die Fig. 1 von vorn zeigt, besteht die Webschaftvorrichtung aus den beiden Hebeschäften 1 und 2, die mit Hilfe bekannter Mittel (nicht dargestellt) eine gegenläufige Bewegung ausführen. An den Hebeschäften sind die Litzentragschienen 3 und 4 angeordnet, die durch Schaftstützen (nicht dargestellt) mit den unteren Litzentragschienen 3a und 4a verbunden sind.As shown in FIG. 1 from the front, the heald frame device consists of the two lifting shafts 1 and 2, which perform an opposite movement using known means (not shown). The heddle support rails 3 and 4 are arranged on the lifting shafts and are connected to the lower heddle support rails 3a and 4a by shaft supports (not shown).

Das bedeutet, wenn die Litzentragschienen 4, 4a eine nach oben gerichtete Bewegung machen, die Litzentragschienen 3, 3a eine entsprechende gegenläufige Bewegung ausführen. An den Litzentragschienen 3, 4 bzw. 3a, 4a sind die Hebelitzen 5 bzw. 6 angebracht, die mit entsprechenden öffnungen (nicht dargestellt) versehen sind, durch die die Steherfäden gezogen werden. Damit wird deutlich, daß bei der wechselseitigen Bewegung der Hebeschäfte 1, 2 die Steherfäden jeweils bei entsprechender Stellung eine Offenfach- bzw. eine Geschlossenfachstellung einnehmen.This means that if the heddle support rails 4, 4a make an upward movement, the heddle support rails 3, 3a execute a corresponding opposite movement. The lifting strands 5 and 6 are attached to the heddle support rails 3, 4 and 3a, 4a and are provided with corresponding openings (not shown) through which the upright threads are pulled. This makes it clear that with the reciprocal movement of the lifting shafts 1, 2, the upright threads each assume an open compartment or a closed compartment position in the corresponding position.

An den oberen Litzentragschienen 3, 4 ist ein Halbschaft 7 über Klemmstücke 10 bzw. 10a angebracht. Der Halbschaft 7 weist ein Gleitstück 8 auf, das auf den mit den Klemmstücken 10, 10a versehenen Stäben 9 bzw. 9a geführt ist, die mit den Litzentragschienen verbunden sind. Es sind dabei zwei Stäbe 9, 9a vorgesehen, so daß jeweils die dazugehörigen Litzentragschienen 3, 3a bzw. 4, 4a durch jeweils einen Stab 9 bzw. 9a verbunden sind. Wie die Fig. 2 und 5 zeigen, ist der Halbschaft 7 durch das Gleitstück 8 mit der Litzentragschiene 4, und zwar nach der beispielsweisen Ausführungsform durch das Klemmstück 10, magnetisch verbunden, indem in dem Gleitstück 8 entsprechende Magnete 11 eingearbeitet sind. Zur besseren Stabilisierung der Webschäfte können die Stäbe unrund ausgebildet sein.On the upper strand support rails 3, 4, a half shaft 7 is attached via clamping pieces 10 and 10a. The half shaft 7 has a sliding piece 8 which is guided on the rods 9 and 9a provided with the clamping pieces 10, 10a, which are connected to the heddle support rails. There are two rods 9, 9a provided so that the associated heddle support rails 3, 3a or 4, 4a are each connected by a rod 9 or 9a. As shown in FIGS. 2 and 5, the half-shaft 7 is magnetically connected by the slider 8 to the heddle support rail 4, specifically according to the exemplary embodiment by the clamping piece 10, by incorporating corresponding magnets 11 in the slider 8. For better stabilization of the heald frames, the rods can be non-circular.

Weiterhin können am Gleitstück 8 und am gegenüberliegenden Klemmstück 10 Führungsmittel vorgesehen sein, die eine einwandfreie Lage des Halbschaftes gewährleisten. Zu diesem Zwecke können am Gleitstück 8 ein Keil 12a und am Klemmstück 10 eine korrespondierende Aussparung 13 vorgesehen sein.Furthermore, 10 guide means can be provided on the slider 8 and on the opposite clamping piece, which ensure a perfect position of the half-shaft. For this purpose, a wedge 12a can be provided on the slider 8 and a corresponding recess 13 can be provided on the clamping piece 10.

Wie die Fig. 2 zeigt, nimmt bei der Bewegung der Litzentragschienen 4, 4a in Richtung des Pfeiles X das Klemmstück 10, das an der Litzentragschiene 4 befestigt ist, den Halbschaft 7 nach oben mit, bis die Litzentragschienen 4 bzw. 4a die Kreuzungslage mit der Litzentragschiene 3 bzw. 3a erreichen. Dann nimmt die Litzentragschiene 3 mittels des Klemmstücks 10a das Gleitstück 8 und damit den Halbschaft 7 mit, an dem die Halblitze 12 für den Dreherfaden angehängt ist (vergl. auch Fig. 4 und 5), die zwischen den Hebelitzen 5, 6 angeordnet ist (Fig. 3). Macht die Litzentragschiene 3 die umgekehrte Bewegung, dann wird der Halbschaft 7 durch die Magnetkraft wieder mit nach oben gezogen, bis das Klemmstück 10 an der anderen Litzentragschiene 4 den Halbschaft 7 wieder mit nach unten nimmt.As shown in FIG. 2, during the movement of the heddle support rails 4, 4a in the direction of arrow X, the clamping piece 10, which is fastened to the heddle support rail 4, takes the half-shaft 7 upwards until the heddle support rails 4 and 4a take the crossing position with them reach the heddle support rail 3 or 3a. Then the heddle support rail 3 takes the slider 8 and thus the half shaft 7 with the clamping piece 10a, on which the half heddle 12 for the leno thread is attached (see also FIGS. 4 and 5), which is arranged between the lifting strands 5, 6 ( Fig. 3). If the heddle support rail 3 makes the opposite movement, then the half shaft 7 is pulled up again by the magnetic force until the clamping piece 10 on the other heddle support rail 4 takes the half shaft 7 down again.

Daraus wird deutlich, daß durch die Wechselbewegung der Litzentragschienen auch der Halbschaft 7 eine entsprechende Wechselbewegung ausführt, so daß die Halblitze 12, die an dem Halbschaft angebracht ist, jeweils kurz vor der Geschlossenfachstellung den in der Halblitze 12 geführten Dreherfaden mitnimmt, was zur Folge hat, daß der Dreherfaden einmal links von dem Steherfaden und einmal rechts von dem Steherfaden vorbeigeführt wird, so daß dadurch eine Bindung zustandekommt.It is clear from this that, due to the alternating movement of the heddle support rails, the half-shaft 7 also carries out a corresponding alternating movement, so that the half-strand 12, which is attached to the half-shaft, takes the leno thread guided in the half-strand 12 shortly before the closed shed position, which has the consequence that the leno thread is passed once to the left of the upright thread and once to the right of the upright thread, so that a binding is achieved.

Claims (4)

  1. Heald shaft device, which is suitable for the obtaining of a leno edge, with lifting healds mounted on counter-running heald carrier shafts as well as a half heald which is mounted on a half shaft, which is alternately controlled by the heald carrier rails, characterised thereby that the half shaft (7) is magnetically connected with the heald carrier rail (3 or 4).
  2. Heald shaft device according to claim 1, characterised thereby that the half shaft (7) has a slide element (8) which is provided with a magnet (11) and is guided on rods (9, 9a), which are connected with the like-running heald carrier rails (3, 3a or 4, 4a).
  3. Heald shaft device according to claim 2, characterised thereby that the slide element (8) and the clamping piece (10, 10a) associated therewith have guide means.
  4. Heald shaft device according to claim 3, characterised thereby that a wedge (12a) is arranged at the slide element (8) and that the clamping piece (10, 10a) has a corresponding recess (13).
EP88103567A 1987-03-16 1988-03-08 Heald frame device for leno selvedges Expired - Lifetime EP0282874B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88103567T ATE74975T1 (en) 1987-03-16 1988-03-08 HEAVY DUTY DEVICE SUITABLE TO ACHIEVE A LIVE EDGE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8703920U DE8703920U1 (en) 1987-03-16 1987-03-16 To achieve a leno edge suitable heald shaft
DE8703920U 1987-03-16

Publications (3)

Publication Number Publication Date
EP0282874A2 EP0282874A2 (en) 1988-09-21
EP0282874A3 EP0282874A3 (en) 1989-09-13
EP0282874B1 true EP0282874B1 (en) 1992-04-15

Family

ID=6805911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88103567A Expired - Lifetime EP0282874B1 (en) 1987-03-16 1988-03-08 Heald frame device for leno selvedges

Country Status (6)

Country Link
EP (1) EP0282874B1 (en)
JP (1) JPS63235541A (en)
AT (1) ATE74975T1 (en)
DE (2) DE8703920U1 (en)
ES (1) ES2030779T3 (en)
GR (1) GR3004408T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3830107A1 (en) * 1988-09-05 1990-04-12 Egelhaaf C C Fa TURNING DEVICE FOR WEAVING MACHINES
IT1230002B (en) * 1989-04-21 1991-09-20 Somet Soc Mec Tessile MOBILE DEVICE TO PERFORM THE ENGLISH BINDING OF THE EDGES OF FABRICS IN FORMATION ON WEAVING FRAMES WITHOUT SHUTTLES.
DE29703896U1 (en) * 1997-03-04 1998-07-02 Klöcker-Entwicklungs-GmbH, 46325 Borken Lifting wire
DE29715332U1 (en) * 1997-08-26 1997-11-27 Textilma Ag, Hergiswil Jacquard device for a weaving machine
DE19750804C1 (en) * 1997-11-17 1999-05-12 Kloecker Entwicklungs Gmbh Half strand of a leno selvedge device with lifting strands
EP2063007B1 (en) * 2007-11-21 2010-09-29 Groz-Beckert KG Device for making leno fabrics
CN105256433A (en) * 2015-10-10 2016-01-20 浙江丝绸科技有限公司 Novel drafting method for weaving lenos on digital rapier loom and leno heald combined returning device adopted in method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT141409B (en) * 1933-01-25 1935-04-25 Grob & Co Ag Dreherweblitze.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1535611C3 (en) * 1961-10-11 1973-11-15 Societe Alsacienne De Constructions Mecaniques De Mulhouse, Muelhausen (Frankreich) Process for the production of fabric strips and device for its implementation
CH391595A (en) * 1962-02-08 1965-04-30 Sulzer Ag Lathe device for weaving machines
AT365666B (en) * 1979-01-20 1982-02-10 Kloecker Heinz TURNING HARNESS FOR MAKING A BINDING FABRIC EDGE, ESPECIALLY WITH PROTECTIVE WEAVING MACHINES

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT141409B (en) * 1933-01-25 1935-04-25 Grob & Co Ag Dreherweblitze.

Also Published As

Publication number Publication date
ATE74975T1 (en) 1992-05-15
EP0282874A3 (en) 1989-09-13
EP0282874A2 (en) 1988-09-21
GR3004408T3 (en) 1993-03-31
JPS63235541A (en) 1988-09-30
DE8703920U1 (en) 1988-07-21
DE3870005D1 (en) 1992-05-21
ES2030779T3 (en) 1992-11-16

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