Method for the application and reading of, and bottle with optic

Details Method for the application and reading of, and bottle with optic Method for the application and reading of, and bottle with optic

1989-07-21

1991-02-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

235488, 365126, G06K 710

Patent

active

049907921

ABSTRACT:
What is described is a method of applying optically readable code marks (14) to the surface of bottles (10) of plastics material or glass by producing depressions in the surface by means of a laser (12) in such a manner that the bottom of each code mark (14) is constructed in the form of a diffusely scattering reflector. A sensor (16) constructed from optical fibres with emitting optical fibres disposed centrally and receiving optical fibres arranged radially is used for the automatic reading of the code marks. The sensor forms an angle of less than 90.degree. with the surface of the bottle so that light is only reflected into the sensor at places on the surface where there are code marks (14). The code marks (14) are easy to apply and can be read reliably.

REFERENCES:
patent: 3893129 (1975-07-01), Endo
patent: 3949160 (1976-04-01), Heurtley
patent: 4410968 (1983-10-01), Frohbach
patent: 4757472 (1988-07-01), Magee

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