Method for testing multilayer tablets in a multiple rotary press

Abstract

The invention is related to a method for testing multilayer tablets in a multiple rotary press, in which die holes of a circulating die plate are successively filled with tablet material of different layers in consecutive filling devices, and the tablet material is compressed layer after layer to pressed articles having n layers by means of synchronously circulating compression punches in compression stations respectively associated to the filling devices, and the pressed articles are subsequently ejected and unloaded in a unloading station, wherein in a testing procedure, pressed articles having in layers are unloaded in an unloading station after the compression and are fed to a testing station, wherein holds 1<=m<n. According to the invention, it is provided that after the initiation of the testing procedure, die holes with pressed articles having in layers run through the (m+1)th filling device after the mth layer had been pressed, and there, tablet material of the (m+1)tb layer is filled onto the pressed articles located in the die holes, that the tablet material of the (m+1)th layer is subsequently sucked off from the die holes containing the pressed articles having m layers by means of a suction device arranged after the (m+1)th filling device and before the (m+1)th compression station, and that only pressed articles from such die holes are fed to the test station that are situated between the mth filling device and the suction device in the moment of the initiation of the testing procedure.

Dependencies are inferred from the claim text.