G.m. Pfaff Aktiengesellschaft

Pfaff Industriemaschinen Gmbh

Wipotec Wiege- Und Positioniersysteme Gmbh

G. M. Pfaff Aktiengesellshcaft

G.m. Aktiengesellschaft

Wipotec Gmbh

Kurt Arnold

Reiner Klein

Wolfgang Hauck

Bernhard Mertel

Karl-Heinz Walther

Horst Zinssmeister

Walter Hager

Theo Düppre

Edgar Butzen

Gunther Denuell

Klaus Edelmann

Peter Liell

Rudolf Schäfer

Johannes Stelter

The invention pertains to a device for loading goods into and/or unloading goods from a loading space, particularly a container, with a conveyor armthat features a transfer stationfor receiving the goods in the region of its proximal end and a transfer stationfor delivering the goods in the region of its distal end, wherein the conveyor armfeatures a transport sectionfor transporting the goods from the transfer stationto the transfer station, wherein the transfer stationis realized in the form of a transfer and/or removal headthat automatically deposits the goods at a predefined position in the loading space () and/or automatically picks up the goods from a predefined position in the loading space (), and wherein the conveyor armis able to continuously transport the stream of successive goods to and/or from the predefined position.

Device for loading goods into and/or unloading goods from a loading space, particularly a container

A sewing or embroidering machine is provided with a thread-cutting device and a signal transmitter representing the angular position of the arm shaft. The drive of the catch thread device is acted upon as a function of the signals generated by the signal transmitter according to a movement program stored in a memory. The path data of this movement program are in a defined relation to the rotary movement or the current angular position of the hook. The drive of the catch thread device is part of a regulating device operating as a cascade control or of a control device operating as a path plan control. Due to the exact agreement in time between the movement process of the catch thread device and the course of the rotary movement of the hook, the thread-cutting process can now also be carried out during the phase of deceleration of the sewing machine, so that an inexpensive, uncontrolled motor can now be used to drive the sewing machine.

Sewing or embroidering machine with a thread-cutting device

In a process and device for monitoring a residual amount of hook thread in a double thread lockstitch sewing machine, a bobbin is used, which is divided into a large clamber and a small chamber due to the arrangement of a middle flange, wherein the small chamber accommodates the residual amount of thread. An abrupt reduction in the speed of rotation of the bobbin, n.sub.S, takes place dating sewing at the time of the transition from the principal to the residual amount of thread as a consequence of the abrupt change in the thread pull-off site in the bobbin. The jump (abrupt change) in the speed of rotation is measured and is processed info a display signal

Process and device for recognizing a residual amount of the hook thread

A process and device for monitoring the bobbin thread on stitch-forming machines, on the bobbin of which a residual amount of thread is wound in a winding direction opposite the direction of winding of the principal amount of thread, is to ensure that a first control function will be generated at the beginning of consumption of the residual amount of thread, and a second control function is generated nearly without delay in the case of thread end or thread break. To achieve this, two signal patterns are received with a phase shift from a bobbin acting as a signal generator, and the first signal function is generated in the case of a deviation of the actual phase shift from the desired phase shift. If only one signal pattern is received, this first control function is also generated if its signal sequence deviates from a reference signal sequence. The second control function is generated if a stoppage of the bobbin lasts longer than a predeterminable number of stitches. Devices for carrying out this process, as well as a device for winding thread on the bobbin in different directions of rotation for the principal amount of thread and the residual amount of thread are provided.

Process and device for monitoring the bobbin thread on stitch-forming

Sewing machine thread monitoring system

A sewing machine is provided with a device for stopping the drive in the case of a thread disturbance. The device has a light source, a first light guide device for transmitting the light beams to the monitoring point, a second light guide device, via which a signal can be sent to a receiver in the absence of thread at the monitoring point, and a control unit for signal evaluation and to report a thread disturbance, even in the case of maximum deflection of the thread at right angles to the pull-off direction, only when a thread disturbance does really exist. To achieve this, the first light guide device is designed, on its side facing the thread, in a plane perpendicular to the thread pull-off direction, with a radiation outlet which extends preferably in the horizontal direction. The first light guide device causes light beams to be sent over the maximum range of movement of the thread at equal radiation intensity over an entire radiation cross section. A radiation inlet of the second light guide device, whose radiation inlet is intended to receive the light beams passing through the maximum range of movement of the thread at right angles to the pull-off direction after the thread has been removed. The control unit of the device causes a signal to be issued in the case of a change in the intensity of the radiation signal entering the receiver due to the absence of thread in the zone of the monitoring point.

Device for stopping the drive of a sewing machine in the case of a

To recognize missed stitches during the operation of a sewing machine, a function, which represents the tensile force of a thread fed into a stitch-forming device depending on the angle of rotation of the main shaft, is scanned in its entirety during each revolution period of the main shaft for selected characteristics without regard to the location of this characteristic within the revolution period. The characteristics found are measured in order to obtain for each characteristic an analytical value that is compared with the corresponding analytical value from at least the last preceding revolution period to form the difference of the two analytical values. If this difference exceeds a predeterminable value, a decision corresponding to a missed stitch is made.

Process and device for recognizing missed stitches during the operation

Sewing machine with thread monitor

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Kaiserslautern, Germany

Kurt Arnold