Sheet determination apparatus

A sheet determination apparatus comprising

• a thickness sensor with a plurality of thickness detection elements arranged over an entire width of a transport passage for detecting a thickness of sheets, which pass the transport passage,
• profile extraction means for extracting profile data representative of an outward shape of sheets, which pass the transport passage, from detection waveform detected every thickness detection element,
• storage means for storing profile basic data of sheets, which constitute standards,
• comparison means for making comparison between profile data extracted from the profile extraction means and profile basic data stored in the storage means, and
• determination means for determining at least kinds of sheets from results of comparison in the comparison means.

A sheet determination apparatus comprising

• a thickness sensor with a plurality of thickness detection elements arranged over an entire width of a transport passage for detecting a thickness of sheets, which pass the transport passage,
• profile extraction means for extracting profile data representative of an outward shape of sheets, which pass the transport passage, from detection waveform detected every thickness detection element,
• image data acquisition means provided facing the transport passage to acquire outward shape data of sheets in the transport course of the transport passage in image,
• tolerance calculation means for calculating a tolerance from the outward shape data and the profile data,
• storage means for storing profile basic data of sheets, which constitute standards,
• comparison means for making comparison between the profile data and the profile basic data on the basis of the tolerance calculated by the tolerance calculation means, and
• determination means for determining at least the number of sheets from results of comparison in the comparison means.

A sheet determination apparatus comprising

• a thickness sensor with a plurality of thickness detection elements arranged over an entire width of a transport passage for detecting a thickness of sheets, which pass the transport passage,
• profile extraction means for extracting profile data representative of an outward shape of sheets, which pass the transport passage, from detection waveform detected every thickness detection element,
• storage means for storing profile basic data of sheets, which constitute standards,
• fold detection means for detecting a fold or folds of transported sheets from the profile data,
• comparison means for creating development data, in which the detected fold or folds are developed, from the profile data when the fold detection means detects the presence of a fold or folds, and making comparison between the development data and the profile basic data, and
• determination means for determining at least the number of sheets from results of comparison in the comparison means.