Material-web marking by means of bar code
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United States of America Patent
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May 21, 1991
Grant Date -
N/A
app pub date -
Jan 16, 1990
filing date -
Jul 21, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method and an apparatus for marking flat objects (4) by means of bar code (4). The object of the invention is to form a code, preferably a bar code, in that with the aid of an adhesive, for example, a thermoplastic adhesive, a two-component adhesive, an adhesive solution or the like, glass beads are applied to the objects in the form of a code, such glass beads having a diameter of 0.01 mm to 1 mm, preferably 0.05 mm to 0.8 mm, particularly 0.08 mm to 0.5 mm, and having a refractive index greater than 1.5, preferably 1.85 to 2.0.
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