Pfaff Industriemaschinen Gmbh

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

H. F. & Ph. F. Reemtsma Gmbh Co.

Spectra-physics Visiontech Oy

Durkopp Adler Aktiengesellschaft and Pfaff Industriemaschinen Gmbh

Heribert Geisselmann

Manfred Frank

Erich Willenbacher

Fritz Jehle

Detlef Paul

Wolfgang Graudejus

Richard Wagner

Joachim Rosch

Eberhard Briem

Wilhelm Haettich

In a method of and an apparatus for detecting three-dimensional defects in he automatic inspection of moving surfaces by means of a color vision system the surface of a moving test specimen which is to be inspected is illuminated with light of different colors simultaneously from at least two different directions, such that edges of three-dimensional defects on the surface appear with a different coloring, and on the basis of the altered coloring, at least two channels of the color image are evaluated to detect three-dimensional defects and to differentiate same from planar defects.

Method of and apparatus for automatic detection of three-dimensional

The invention relates to a process for the optical sorting of bulk material in a colour-sorting machine while it is conveyed over a transport belt and moves past an observation head with a light source and a product signal receiver arranged in the vicinity of the light source, whereby the reflected light of the image points of the examination material is broken down into several spectral ranges by various colour filters of detection elements lying next to one another of a line of the receiver and the examination material is sorted on the basis of the colour values (measured value of the intensity in the colour in question). According to the invention, it is provided in order to improve the detection rate that, in the case of examination material mixed with reject parts, in each case the colour values of the product are studied in several selected sub-ranges, while, in every sub-range, a classifier ascertains connected areas of image points with colour values falling into the pertinent sub-range and carries out a classification according to preset criteria from the geometry and the size of these detection areas.

Processing for the optical sorting of bulk material

Device for detecting and counting warp and weft threads in a feed device

Process and sewing machine for sewing together layers of fabric

A method and apparatus for the pattern-correct sewing together of two pieces of cloth having the same pattern by a sewing machine with one cloth feed mechanism arranged over and one arranged under the cloth pieces, the feed quantity of which is variably by at least one positioning system relative to each other, uses a sensor arranged upstream of a stitch forming point for each cloth piece and a signal processing unit which processes signals from the sensors corresponding to the relative position of the cloth pieces and which influences the positioning system for the feed mechanism in accordance with the established relative position of the cloth pieces. For the pattern-correct sewing together of the two cloth pieces, the pattern structure of each cloth piece is continuously determined by the sensors by measuring values of a structure-or pattern-typical criterion. The found values are sent as signals to the signal processing unit, and the signals of both sensors, taken from the two cloth pieces within the same predetermined length before the stitch forming point, are stored independently of each other in the signal processing unit as signal sequences. From the signal sequences the signal processing unit determines the momentary offset between the two cloth parts by calculation of their degree of overlap and thereby controls the positioning system.

Method and apparatus for the pattern-correct sewing together of cloth

Growing community of inventors

Stutensee, Germany

Heribert Geisselmann