Method of and apparatus for detecting defects of elastic-member

Details Method of and apparatus for detecting defects of elastic-member Method of and apparatus for detecting defects of elastic-member

1989-01-24

1990-01-23

Myracle, Jerry W.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

G01N 308

Patent

active

048950297

ABSTRACT:
A method of and an apparatus thereof for detecting defects of a joint portion of an elastic-member sheet of the present invention comprises grasping an elastic-member sheet having a joint portion so as to detect at least one face of the joint portion through use of an optical measuring apparatus. With the elastic-member sheet being extended by a given percentage, comparing and identifying of the displacement amount of the joint portion, represented by a detecting signal, with a predetermined reference value by an operation processing unit which receives the detecting signal of the measuring apparatus so as to automatically judge the defect of the joint portion.

REFERENCES:
patent: 4719347 (1988-01-01), Kugler et al.

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