Lindauer Dornier Gesellschaft Mbh

Staubli Faverges

Lindauer Dornier Gmbh

Lindauer Dornier Gesellschaft MIT Beschränkter Haftung

Adnan Wahhoud

Peter Czura

Josef Hehle

Dieter Teufel

Hans-Dieter Scorl

Herbert Mueller

Peter D Dornier

Werner Birner

Valentin Krumm

Peter Schiller

Matthias Armbrust

Rudolf Riezler

Juergen Vossen

Horst Haeussler

Hubertus Ludwig

Thomas Laukamp

Markus Gielen

Jochen Balken

Othmar Oppl

Fritz Rupflin

Ewald Zimmermann

Harald Arnold

Hans-Joachim Zeller

Wilhelm Rupp

Leonhard Groeger

Ulrich Loehr

Walther Truyen

For producing woven fabrics with additional pattern effects, one or more effect threads are supplied substantially in the warp direction and are moved over neighboring warp threads in the weft direction, above a weft thread that is to be inserted, in various motion cycles of a weaving machine. Subsequently the effect threads are positioned below a subsequent weft thread, by submerging the effect threads into upwardly open reed gaps of a reed. To facilitate this, the reed includes first reed blades which, at their upper end, each include a sloping thread guide element projecting in the longitudinal direction of the reed, so as to at least partially extend over the upwardly facing opening of a neighboring reed gap. The reed further includes second reed blades having no such sloping thread guide elements. The guide elements guide the effect threads down into the proper reed gaps.

Reed and weaving machine for weaving pattern formation in woven fabrics with additional pattern effects

A loom, especially an air jet loom for producing a leno cloth with integrated patterning includes a weaving reed and first and second shed forming devices. The first shed forming device includes a pivotable reed as a first guide arrangement for guiding and shedding leno warp threads, and an upright reed as a second guide arrangement for guiding and shedding ground warp threads, to form leno bindings. The second shed forming device includes a third guide arrangement for guiding and shedding patterning warp threads, to form pattern bindings. The third guide arrangement is arranged between the first shed forming device and the weaving reed.

Power loom, particularly an air jet power loom, for the production of a leno fabric with integral patterning

A leno cloth is prepared, which comprises at least ground warp threads, leno warp threadsand weft threads, and in which the weft threadsand the ground warp threadsare arranged essentially interspace free. The weft threads are bound-off by means of the leno warp threads, which comprise a clearly lower titer relative to the ground warp threads, with such a lower tension relative to the ground warp threads, so that the crossings of the leno warp threadswith the ground warp threadsthat are present due to the binding are arranged in a plane parallel to the plane of the maximum thickness of the weft threads. The leno warp threadscomprise a higher working-in or take-up into the woven cloth than the ground warp threads. According to a further aspect of the invention, a method for the production of a leno cloth as well as a loom for the carrying out of the method for the production of a leno cloth are described.

Leno cloth as well as method and weaving machine for production thereof

A loom simultaneously forms a plain weave () and a gauze weave () in a textile () in one weaving cycle. To form the plain weave (), the adjacent warp threads () that are used to form the upper shed and lower shed are alternately lifted from the lower shed position into the upper shed position and lowered from the upper shed position into the lower shed position by the same drop wire/needle shank (). To form the gauze weave (), only the warp threads () that form the upper shed are raised by the drop wire/needle shank () from the lower shed position into the upper shed position and lowered from the upper shed position into the lower shed position.

Method for producing a fabric in plain weaves and leno weaves and a loom for carrying out the method

In a weaving machine for the production of a leno fabric including ground, leno, and weft threads, in which ground and leno threads form warps, the drive of the guide means () for the ground threads and/or of the guide means () for the leno threads () is derived from the drive means of the sley.

Loom for the production of a gauze material

The filaments in a weft thread or yarn in a pneumatic loom are tangled and consolidated to prevent untangling of the weft thread when it is transported, after the tangling, through the weft insertion channel in a loom shed. For this purpose the leading end of the weft thread is temporarily stopped in a weft insertion nozzle pipe by a first air stream the so-called holding air stream () with a first pressure (P) between two weaving cycles following each other for holding the weft thread stretched. At the same time a second air stream () having a higher pressure (P) than the first pressure (P) and a different flow direction than the first air stream () is applied to or along a leading end portion of the weft thread for tangling the filaments and thereby locking or consolidating the filaments in the weft thread. Each weft insertion nozzle pipe has a first port and a second port through which the first and second air streams are introduced into the weft insertion the nozzle pipe. The second port is positioned downstream of the first port and closer to a free exit end () of the respective weft insertion nozzle pipe but still spaced from the free exit end.

Method and apparatus for entangling filaments in a weft yarn on a weaving loom with pneumatic weft insertion

The shed of a fluidic weaving loom is not changed simultaneously for all warp threads, but rather continuously starting at the weft entrance and continuing helically, so to speak, to the exit of the warp shed. This sequential shed closure takes place with a so-called domino effect along a helical line curved in space, whereby additional time is gained for stretching the inserted weft thread and temporarily stopping the shed formation or shedding is avoided.

Method for controlling the shed in a loom with fluidic weft insertion

In a loom with a mechanical weft insertion the motion of each individual warp thread on its way from an uppermost position to a lowermost position and vice verse is controlled individually by a jacquard in such a way, that the motion profile includes a shed stopping in a weft entrance section and simultaneously in a weft exit section of a weaving width of the loom. Shed stopping is avoided in an intermediate section between the weft entrance and exit sections of the weaving width of a loom thereby providing sufficient time for the rapiers or grippers to be withdrawn from the shed without damaging the warp threads.

Method for controlling the shed in a loom with mechanical weft insertion

An arrangement for supplying air with a controlled pressure to the main weft insertion nozzles of an air jet loom includes a single servovalve connected between a pressurized air source, an air vent, and a pressure manifold, and individual shut-off valves respectively interposed in branch lines connected from the pressure manifold to the individual nozzles. A pressure sensor measures the actual pressure provided to the manifold. An electronic controller receives a pressure control signal and controls the servovalve responsive to any difference between the pressure control signal and the actual measured pressure signal. The arrangement is simple, economical, and rapidly reacting, to avoid the need of individual throttle valves or pressure regulators for the individual nozzles.

Air supply controller for weft insertion nozzles in an air jet loom

Ground warp and pile warp thread sheets are supplied to a shed forming device. The ground warp and the pile warp are separately deflected over a deflecting rod upstream from the shed forming device. The deflecting rod supports the ground warp and directs the pile warp to cross and interpenetrate through the ground warp before deflecting the pile warp into the back shed. The deflecting rod is positively driven and controlled to pivot about a horizontal axis to provide a positive controlled partial compensation of the pile warp thread length variations. The pile warp also runs over a pile warp thread reserve and compensating device upstream from the thread crossing location to provide an additional passive uncontrolled compensation of the pile warp thread length variations and to provide a pile warp thread reserve during the pile loop formation and/or the shed changes in the weaving process.

Terry loom with pile warp length compensation and deflection into back shed

A ground warp thread sheet and a pile warp thread sheet are supplied to a shed forming device. Two stop motions on separate planes respectively monitor the pile warp and the ground warp. The ground warp and the pile warp are deflected over a deflecting rod upstream from the shed forming device. The deflecting rod supports the ground warp and directs the pile warp to cross and interpenetrate through the ground warp before being deflected into the back shed. The vertices of the ground warp and pile warp back sheds are thus located on opposite sides of the deflecting rod. The pile warp crosses through the ground warp directly upstream from the deflecting rod, at a steep angle, for example from 45 to 135 &deg;.

Terry loom with interpenetrating ground warp and pile warp

A weft thread pre-winder or pre-spooling device for an air jet loom includes a thread storage drum ( ) made up of several drum segments ( ) that are each adjustable in the radial direction so as to adjust the diameter and circumference of the thread storage drum. Thereby the amount of stored thread can be adjusted. Open gaps or interspaces ( ) are formed between respective adjacent drum segments ( ), and become larger or smaller depending on the radial adjustment of the segments. Especially for threads that form only a small thread balloon while being drawn-off from the thread storage drum, the threads would tend to get into these interspaces and become caught on the edges or corners of the drum segments, which would lead to energy losses in the thread and interfere with the proper weft insertion and thread transport. To prevent these problems, a protective disk ( ) is fixedly or rotatably arranged on or near the endface of the drum ( ) on the drawing-off side thereof, and the weft thread ( ) is drawn over the outer circumferential edge of the disk ( ), which thus prevents the threads from getting into the interspaces ( ). The diameter of the disk ( ) is substantially matched to the adjusted diameter of the drum segments ( ).

Weft pre-spooling device for air jet loom

A warp thread control system for forming the loom shed as a first control section (,) and a second warp control section (,). The first section is equipped with at least one guide element (,) for guiding the leno threads (,) and a guide rod (,) carrying a multitude of passages,arranged and parallel to one another for guiding the ground threads (,). The second warp control section (,) includes a thread detour element (,) for detouring the leno threads (,) and a needle bar (,) carrying a multitude of needles (,) with needle eyes (,) for guiding the leno threads (,). Both the first warp control section (,) and the second warp control section (,) are positioned on the side of the reed facing the warp threads whereby the positioning may differ either above or below a weaving plane (,) or partially above and partially below the weaving plane (,). Preferably but not necessarily both warp control sections are driven by a common drive (,).

Weaving loom for producing a leno fabric

A leno ground fabric is produced over the entire weaving width of a loom by using two heald frames each having a length corresponding to the weaving width. The heald frames are equipped with a multitude of lifting healds or heddles and with a multitude of half healds or heddles that move the leno warp thread and the ground warp threads for the shed formation over the entire loom width.

Method and weaving loom for producing a leno ground fabric

An electromagnet exhibits in its energization curve (I&equals;f(t)) a characteristic feature or indicator, for example, in the form of a dip (,) in the energization current. This indicator is used to control the operation of the magnet, for example, to synchronize its operation with that of another magnet. In a loom the operation of a weft stop magnet positioned next to a weft prewinder may be synchronized with the operation of a solenoid driving a valve that supplies air to the main weft insertion nozzle and/or relay nozzles. A magnet may also be controlled with reference to rated operation values so that its actual operation value coincides with the rated value or values or at least is maintained within a permissible tolerance range of rated values. The control takes place in closed loop fashion, for example, through the main loom control.

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Lindau, Germany

Adnan Wahhoud