Method of marking objects with code symbols

Details Method of marking objects with code symbols Method of marking objects with code symbols

1995-06-07

1998-02-17

Han, Frances

Printed matter

Method

Identifying

283 93, G06K 1100

Patent

active

057184577

ABSTRACT:
Optical machine readable code symbols for marking objects, preferably recyclable plastic bottles, are so constructed that they possess an axis of symmetry. The code symbols can additionally be rotated by predetermined angles from a basic configuration in order to be able to represent a plurality of information pieces. The symmetric code symbols are easily recognized and evaluated under difficult conditions such as exist, for example, in a bottle filling operation.

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