Thickness detector for sheet paper

Abstract

Abstract PURPOSE: To provide a correct result even when there is eccentricity in a reference roller by previously measuring/storing the degree of eccentricity in the reference roller and correcting the eccentricity by referring to the stored value when rally measuring the thickness of paper sheets. CONSTITUTION: The eccentricity degree data of a reference roller 1 at the plural surface positions of the reference roller 1 are previously stored in a storage means 13. When paper sheets 4 are conveyed and its thickness is detected, the position on the surface of the reference roller 1 is recognized by position recognizing means 6 and 7, the eccentricity degree data corresponding to this recognized position are read out of the storage means 13 and by using these read eccentricity degree data, a correspondent thickness detection output is corrected. Thus, even if the degree of eccentricity in the reference roller is different by the material or working degree of the reference roller, the thickness of paper sheets can be properly detected without being affected by that difference.

Inventors

• 👤 Masao Tada
• 👤 Tsunemasa Kobari
• 👤 Motota Yamada

Bibliographic Details