Method of detecting and evaluating identification codes on continuously moving webs

US4673803A · kind A · utility

Inventors

• Ludwig Zerle · Bogen, DE
• Gerhard Brunner · Thun, CH
• Otto Lorenz · Roetgen, DE

Key dates

• Filing date: Nov 21, 1984
• Grant date: Jun 16, 1987
• Expiry date: Nov 21, 2004

Classification

• Technology area (CPC G): Physics
• CPC primary: G06K7/087
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Identification marks in the form of code fields are arranged on a material band which is adapted to be moved in a continuous manner. These identification marks are recognized by a reader head with a subsequent evaluating logic, whereby under conditions of signal flow produced by the reader head on passing of the code field at the evaluating logic, this signal flow is transformed into identification marking corresponding to the respective code field. Each code field is preceded by a starter label which produces a start signal causing the release of the initially blocked signal flow between the reader head and the evaluating logic and actuates a switch component to assume a transmitting condition. On completion of the signal flow transformation into the identification marking, the signal flow ceases due to actuation of the switch component.