A device for detecting defects during sealing of a package including a foil, and a method for detecting defects during sealing of a package including a foil which makes use of such a device. The device may include a distance sensor for determining the distance between at least two clamping elements, and a control unit coupled to the distance sensor for comparing the measured distances to predefined references. Such a device may be operated by, for example, positioning a foil and another part of a package to be connected to the foil between the clamping elements, moving the clamping elements toward one another until a connection between the foil and the other part of the package is formed, determining the distance between the clamping elements over a period, moving the clamping elements apart, and removing the package.

A product detection system includes a first frame piece configured to be coupled to a first sealing jaw of a sealing machine, a second frame piece configured to be coupled to a second sealing jaw of the sealing machine, a first detector bar slidably coupled to the first frame piece, a second detector bar slidably coupled to the second frame piece, a first linear actuator coupled to the first detector bar to move the first detector bar, and a second linear actuator coupled to the second detector bar to move the second detector bar. An encoder is coupled to the second detector bar to detect movement of the second detector bar. The first and second linear actuators are configured to move the first and second detector bars toward one another.

A horn and an anvil are moved toward and away from each other by axially reciprocating a driving rod and thereby reciprocatingly rotating a forked lever in a predetermined angle range. The horn and the anvil are moved toward and pressed against each other with a predetermined force with a bag mouth b held therebetween. A sensor detects the position of a second mounting block secured to the rear end of a sliding shaft of the anvil, thereby detecting the distance between respective pressing surfaces of the horn and the anvil, i.e. the thickness m of a portion of the bag mouth held between the pressing surfaces. When the thickness m is not less than a predetermined threshold value M, a vibrator is activated to perform sealing. When the thickness m is less than the threshold value M, no sealing is performed.

A work piece processing device includes a tool piece, a work piece holder and a servo-elastic actuator system having simultaneous precision force and position control that moves one of the tool piece and the work piece holder to the other of the tool piece and work piece holder.

The invention relates to a device for setting a setting element having a first plastic material in a component having a second plastic material, comprising a rotational advancing unit, by means of which the setting element can be rotated about an axis of rotation and simultaneously an axial force acting in the direction of the axis of rotation can be applied to the setting element in order to drive the setting element into the component, a friction welding joint thereby being produced between the setting element and the component, a differential-distance measuring apparatus for measuring the differential distance between a surface of the component and a surface of the driven setting element, and a control unit for controlling the rotational advancing unit in dependence on the measured differential distance.