Method for calibrating densitometer of cataphoretic apparatus an

Details Method for calibrating densitometer of cataphoretic apparatus an Method for calibrating densitometer of cataphoretic apparatus an

1978-05-23

1980-12-02

Corbin, John K.

Optics: measuring and testing

For light transmission or absorption

Of photographic film

356243, G01N 2106

Patent

active

042368286

ABSTRACT:
In a method for calibrating or checking a densitometer section of a cataphoretic apparatus use is made of a calibration film comprising a transparent and flexible sheet and a pattern applied on the sheet and having a known density and the calibration film is fed into the densitomater with the aid of a mechanism for feeding usual sample bearing films. After the calibration for the densitometer has been completed using the introduced calibration film the film is discharged out of the densitometer with the aid of a mechanism for discharging the usual sample bearing films.

REFERENCES:
patent: 3669543 (1972-06-01), Vaccaro
patent: 3752995 (1973-08-01), Liedholz
patent: 3817632 (1974-06-01), Picunko et al.
patent: 3994593 (1976-11-01), Kato et al.
patent: 3995959 (1976-12-01), Shaber
patent: 4043676 (1977-08-01), Holzinger et al.

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