METHOD FOR DEFECT DETECTION IN A PRINTING SYSTEM AND PRINTING SYSTEM

The present invention provides an apparatus (20) for defect detection in a printing system (1). The apparatus (20) comprises: a sensing unit (21) having at least one first sensor device (22) for sensing a surface geometry or topology of a sheet (S) to be printed as the sheet (S) travels on a transpo...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KAWAGUCHI, Daisuke, CLEVERS, Ernest J.J, OTEMAN, Peter L.J, VAN ACQUOIJ, Catharinus
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CALCULATING CINEMATOGRAPHY COMPUTING CONVEYING CORRECTION OF TYPOGRAPHICAL ERRORS COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY ELECTROPHOTOGRAPHY HANDLING THIN OR FILAMENTARY MATERIAL HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES HOLOGRAPHY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME IMAGE DATA PROCESSING OR GENERATION, IN GENERAL INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LINING MACHINES MAGNETOGRAPHY MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS PACKING PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION PRINTING SELECTIVE PRINTING MECHANISMS STAMPS STORING TESTING TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	The present invention provides an apparatus (20) for defect detection in a printing system (1). The apparatus (20) comprises: a sensing unit (21) having at least one first sensor device (22) for sensing a surface geometry or topology of a sheet (S) to be printed as the sheet (S) travels on a transport path (P) of the printing system (1) and for generating data (I) representative of that surface geometry or topology; and a processor device (25) for processing the data (I) from the first sensor device (22) to detect and classify deformations (D) in the surface geometry or topology of the sheet (S) based on at least one predetermined criterion, wherein the at least one predetermined criterion is adjustable or variable to suit operating conditions in the printing system (1). Further, the invention provides a corresponding method of detecting defects in a printing system (1).