Abstract: A device which enables fully automatic removal of spot-check samples from unfolded cartons, and predetermines, by means of a counting and marking unit, a precise selected stack quantity from a travelling endless stack disposed in a scale-like configuration, so that they can be combined into a truss at the end of the scale stack. The device comprises a conveyor belt upon which the endless stack is transported in an oblique scale-like configuration at variable speed, a vertically-adjustable hold-down bar defining the stack height, a sensor scanning the stack height, at least one optical measuring arrangement for the position at any moment of a carton, a gripper disposed on a travelling gripper carriage for spot-check sampling, a magazine for receiving the removed spot-check samples and a pusher marking a folded carton.

Abstract: A device for on-line control and automatic ejection of faulty blanks moving along a conveyor wherein there is a linear ejector conveyor positioned laterally and at an acute angle to the conveyor direction and wherein the speed with which the faulty blanks are conveyed away by the ejector conveyor is related to the speed of the conveyor by the relationship(Conveyor Speed)=(Ejector Conveyor Speed)(Cosine of the acute angle).

Abstract: An apparatus for rapid colorimetry on different samples which has a transmitter for irradiating or through-radiating the particular sample and a receiver for receiving the radiation reflected or transmitted by the sample, as well as a filter arrangement. Also included is a computer for evaluating the signals from the receiver. The transmitter is formed by several semiconductor radiation sources, which irradiate in different spectral ranges and whose optical radiation is combined by means of a filter unit and is deflected onto the sample by a lens arrangement. A control unit controls the semiconductor radiation sources in successive pulsewise intervals. The control unit also supplies a signal permitting an association of the receiver signals to the radiation emitted in the different spectral ranges.