Method of and apparatus for inspecting cigarette paper

Details Method of and apparatus for inspecting cigarette paper Method of and apparatus for inspecting cigarette paper

1984-01-25

1987-07-07

Millin, V.

Tobacco

Cigar or cigarette making

131908, 131910, A24C 500, A24C 514

Patent

active

046779930

ABSTRACT:
A method and apparatus for inspecting cigarette paper of eventual cigarette bar unit, which permit further improvement of the precision of inspection, is provided. According to the method and the apparatus, the mean, variance and standard deviation are obtained statistically through a detected pressure signal, then transformation of their normal distribution into a standard normal distribution of N(0,1) where the mean with respect to the probability density function .PHI.(t) is 0 and variance with respect to thereto is 1, is obtained. And the estimation of population standard deviation with setting of a significance level is done with the value of t with respect to the probability determined solely by determining the probability in the normal distribution, thereby effecting a decision as to whether the inspected product is non-defective or defective.

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