Asahi Kasei Kogyo Kabushiki Kaisha

Sadaji Nishimura

Kaoru Takasuka

Masatatsu Takahashi

Disclosed is a non-woven fabric defect detecting device in which light is applied to a travelling non-woven fabric to optically or electrically scan the non-woven fabric in its widthwise direction and the light from each point on the non-woven fabric is converted into an electric signal. The converted electric signal is classified into a plurality of levels to detect at least a hole and a heavy filling bar. The durations of these detected outputs are counted in the form of clocks and grading of the quality of the non-woven value is achieved based on the count values. The abovesaid converted output is differentiated and the differentiated output above a predetermined level is detected as fold bar.

Growing community of inventors

Fuji, Japan

Sadaji Nishimura