Method for optically sensing marks on objects and apparatus for carrying out the method

US5025477A · kind A · utility

Assignee

• Siemens Nixdorf Informationssysteme AG · DE

Inventors

• Guenter Baitz · Berlin, DE
• Rudolf Behling · Kempten (Allgäu), DE

Key dates

• Filing date: Apr 14, 1989
• Grant date: Jun 18, 1991
• Expiry date: Apr 14, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G07G1/0054
• WIPO field: Control
• WIPO sector: Instruments

Abstract

In a method for optically sensing markings on objects at a plurality detecting stations (10), at which the objects are transported by means of a transport apparatus through the sensing area of an optical sensing apparatus (20), an object upon non-regular sensing is automatically returned and again transported through the sensing area of the optical sensing apparatus (20) and then after a predetermined number of unsuccessful sensing attempts is automatically represented on a viewing device (30) at a central station (12) for identification of the object and/or a picture of the non-sensed object is stored in a memory (50).