Lindauer Dornier Gesellschaft Mbh

Lindauer Dornier Gesellschaft MIT Beschraenkter Haftung

Lindauer Dornier Gesellschaft MIT Beschränkter Haftung

Peter Schiller

Dieter Teufel

Josef Hehle

Stephan Arndt

Adnan Wahhoud

Horst Haeussler

Markus Gielen

Valentin Krumm

Peter Czura

Herbert Mueller

Hubertus Ludwig

Hans-Dieter Scorl

Thomas Laukamp

Werner Birner

Matthias Armbrust

Horst Kerner

Siegbert Gsell

Kurt Motz

Hubert Ortmann

Harald Horelt

A device feeds first and second weft threads in a weft direction to a gripper head of a loom and includes a coupling unit that moves back and forth in a warp direction. A first and a second feed unit are adjacently arranged in the warp direction on the coupling unit and are configured to feed the first and the second weft threads to the gripper head. A positioning unit moves the coupling unit in the warp direction in a first position of the coupling unit and counter to the warp direction in a second position of the coupling unit. The first feed unit feeds the first weft thread to the gripper head when the coupling unit is in the first position and the second feed unit feeds the second weft thread to the gripper head when the coupling unit is in the second position.

Device for feeding weft threads to a gripper head of a loom

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

A yarn cutting device for mechanical looms, having two mutually movable blades which are arranged on a mounting surface, at least one of the blades being operable by a drive. The drive is constructed as an electrically energized linear motor, whereby a compact flat construction is achieved which has few movable parts. One of the blade carriers is a rotor of the linear motor.

Linear motor yarn-cutting device for mechanical looms

A valve arrangement of a loom includes valve modules held between flange plates and sharing a common inlet feeding into a common inner valve space. A valve outlet of each valve module leads to an insertion nozzle or nozzle group, and is controlled by a valve disk actuated by a piezoelectric actuator to rapidly dynamically adjust the pressure profile. A quality parameter, characteristic of the thread insertion flight time of each weft thread, is stored in a data bank and has a nominal pressure profile for achieving a nominal thread flight time allocated thereto. The actual thread flight time of each weft thread is measured and compared with the stored nominal thread flight time. A control signal responsive to the time difference is provided to the valve arrangement to control the piezoelectric actuator so as to adjust the pressure and/or the quantity of the pressure medium provided through the valve module to the connected insertion nozzle. Alternatively, the control signal is provided to the main loom rotational drive to adjust the rotational speed of the loom.

Jet loom and method for achieving substantially identical weaving cycle times

A solenoid valve, particularly for use in air nozzle weaving machines, has a valve housing with at least one valve inlet and at least one valve outlet. An electromagnetically actuated valve body is arranged in a passage area between the valve inlet and the valve outlet. In order to permit a fast and operationally reliable exchange of the parts of the solenoid valve subjected to wear, it is provided that a fastening flange, the valve body, as well as the electromagnetic drive together form a first valve subassembly which is subjected to a rapid exchange. The valve housing with its connections forms a second valve subassembly which is fixedly arranged on the machine.

Solenoid valve for air nozzle weaving machines

A clamping holder for flexible lines, particularly current-carrying lines, has a line holder with at least one device for fixing a line and a device clamping the line in the device. The device and the line holder have at least one mutually aligned passage, respectively. A known type of elastic, longitudinally extendible tension device is pulled into the passages. The tension device has a neck-type cross-sectional contraction and connects the line holder with the device in a ventable manner.

Clamping holder for flexible lines

A weft thread clamp for a weft thread presenting lever is positively actuated to selectively open or close the clamp and thereby release or hold the weft thread respectively. To achieve this, a second clamp element is movable or deflectable relative to a first clamp element of the clamp. The movable second clamp element may be directly embodied as an actuator, or may be driven by an actuating motion provided by an actuator located remotely from the clamp on the lever. In the latter case, a motion transmission arrangement such as a sheathed push-pull cable or a rod linkage operatively connects the actuator to the movable second clamp element. The actuator may be a piezoelectric, electromagnetic, hybrid pneumatic-electric, or hybrid hydraulic-electric device, or an electric motor. The loom control unit is connected to the actuator for providing control signals thereto.

Controllable weft thread presenting and clamping apparatus including an

An air nozzle weaving loom has a prenozzle alignment arrangement for the weft yarn picking. Several prenozzles (8a) having respective blow pipe (8b) are accommodated in a prenozzle block 9 according to an order system (geometric configuration) corresponding to the order system (geometric configuration) of main nozzles (5a) in the main nozzle block (6).

Weaving loom, particularly an air nozzle weaving loom

A controlled weft thread presenting and clamping arrangement minimizes weft thread waste and ensures proper tensioning of the weft thread during its presentation to the insertion gripper, in a gripper loom for weaving with plural different weft threads. The arrangement includes a control shaft (13) that has a drive key (14) protruding therefrom in a reference plane (7), and that is rotatably supported on a support bracket (10, 11, 12), which may be mounted on the loom. Weft thread presenting levers (15) each carrying a respective clamp (16) are movably arranged on the shaft (13), which passes through a hole in each of the presenting levers (15). A translational drive (22) acts on a presenting lever support (17) to translationally move all of the presenting levers (15) in unison together axially along the shaft (13) until a selected lever (15) is positioned in the reference plane (7), with the lever's drive groove 15B engaged on the drive key (14) of the shaft (13). A rotational drive (23) rotates the shaft (13), and therewith the selected thread presenting lever (15) via the drive key (14). A guide member (19) has a lengthwise groove (20) to allow all of the presenting levers (15) to move linearly therealong in unison, and a crosswise groove (21) in the reference plane (7) to allow only the selected presenting lever (15) to rotate in the reference plane. A thread back tensioning device (9) is arranged in the thread path to apply tension to the thread being presented to the gripper.

Axially slidable weft thread presenting levers and clamping arrangement

A wide selvage is formed along a fabric edge in a weaving loom by at least two selvage forming heads arranged in a row with an outer selvage forming head (9) and an inner selvage forming head (8) positioned between the outer selvage forming head (9) and an edge of a fabric. The outer selvage forming head (9) seizes a weft end and transmits it to the inner selvage forming head (8) which inserts it into the shed for beat-up. Both forming heads work pneumatically and in tandem with each other. A set of two selvage forming heads (8, 9) is arranged at each fabric edge.

Method and selvage forming device for an air weaving loom

A combined weft thread clamp and cutter apparatus for an air jet loom includes a cutter (3) for cutting a weft thread (1) and a clamp (4) for clamping the weft thread (1). The cutter includes a fixed cutter element (10) and a movable cutter element (9) that is movable relative to the fixed cutter element. The clamp includes a first clamp element (14) and a second clamp element (13). The clamp (13, 14) and the cutter (9, 10) are arranged next to each other, and a spacing distance (8) between the clamp (13, 14) and the cutter (9, 10) is adjustable. The clamping surface of at least one of the clamp elements (13, 14) can be an elastically yielding surface.

Growing community of inventors

Lindau, Germany

Peter Schiller