To provide a sheet sorting method in which paper sheets with a plurality of picture patterns printed are sorted depending on the locations of defective patterns.
The sheet sorting method comprises in which, on paper sheets (100) each with a plurality of picture patterns printed thereon side by side in a longitudinal direction and in a lateral direction, a quality of the patterns thereof is inspected; in a case where the quality of the patterns on the sheets in all of groups into which the plurality of patterns are grouped is determined to be non-defective, these paper sheets are discharged to non-defective sheet discharge locations 21a and 21b; in a case where a defect is determined to exist among the patterns in only one of the groups on each of the sheets, these paper sheets are discharged to single-column defective discharge locations 21c, 21a and 21c (single-group defective sheet discharge locations); and in a case where defects are determined to exist among the patterns in a plurality of columns on each of the sheets, these paper sheets are discharged to plural-column defective discharge locations 21b (plural-group defective sheet discharge locations).
COPYRIGHT: (C)2007,JPO&INPIT
HAYASHI KENJI
Tadahiro Mitsuishi
Yasuyuki Tanaka
Hiroshi Matsumoto
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