The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 1987
Filed:
Jan. 25, 1984
Japan Tobacco Inc., , JP;
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.