Packaging quality control method and apparatus

Details Packaging quality control method and apparatus Packaging quality control method and apparatus

1982-11-24

1985-11-19

McGraw, Vincent P.

Optics: measuring and testing

Of light reflection

250223R, 209536, 356448, G01N 2155

Patent

active

045538476

ABSTRACT:
The quality of a product, for example the degree of filling of cigarette papers, is non-destructively tested using reflectivity measurement. Compensation is provided for the effects of stray light in the measuring zone and the signals commensurate with the measurements performed on individual units of the object being tested are compared with the average of signals obtained through measurements performed on a preselected number of units of acceptable quality. The state of operability of the test apparatus may be self-checked during incremental periods between the testing of units.

REFERENCES:
patent: 3473037 (1969-10-01), Schmermund
patent: 3689158 (1972-09-01), Shifrin
patent: 3818223 (1974-06-01), Gibson et al.
patent: 4158505 (1979-06-01), Mathisen et al.
patent: 4266674 (1981-05-01), Bell et al.
patent: 4267444 (1981-05-01), Bald
patent: 4374329 (1983-02-01), Schoenfelder et al.
patent: 4377743 (1983-03-01), Bolt et al.

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