Patent ID: 6588580
Filing Date: 2003-07-08
Classification: B65G

Abstract:
An apparatus for the transport of workpieces (W), comprisingat least one rotationally driven conveyor belt (1, 2) for the workpieces (W) to be laid onto the workpieces, and with a holding device (3), past which the conveyor belt (1, 2) is led, the holding device (3) retaining the workpieces (W) on the conveyor belt (1, 2) by a means selected from the group consisting of by means of a magnetic field passing through the conveyor belt (1, 2), by generating a vacuum at suction orifices (4) of the conveyor belt (1, 2), and by a combination of said magnetic field means and said vacuum generating means, wherein the holding device (3) has at least one magnetic device (3a) with a magnetic conveyor belt (1) and at least one vacuum device (3b) with a vacuum conveyor belt (2), said vacuum device being separated from said magnetic device, the vacuum device (3b), together with the respective conveyor belt (1, 2), being capable of being displaced relative to a common reference member (5) and of being brought into contact with the workpieces (W) to be transported, wherein the magnetic device (3a) has a hollow profiled strip (13) with main compressed air chambers (14) and a structural unit (15) connected on the transport side and having at least one permanent magnet (59) for generating a magnetic field and at least one electric compensating coil (59â€²) for generating a temporary magnetic field and for compensating the permanent magnetic field.