Patent ID: 7212929

Claim:
A moisture content-acquiring device for acquiring data on moisture contained in a sheet, comprising: a force-applying unit for applying an external force to the sheet; a force-receiving unit for receiving the external force through the sheet; a signal outputting unit for outputting a signal reflecting a mechanical property of the sheet, which signal outputting unit is placed on at least one of the force-applying unit and the force-receiving unit, and which output signal is acquired through application of the external force; and a moisture content-acquiring unit for acquiring data on moisture of the sheet based on the signal from the signal outputting unit, which moisture content-acquiring unit acquires the moisture content of the sheet by a comparison of the signal acquired through application of the external force from the signal outputting unit with data stored in a memory, the data on a relation between a moisture content in the sheet and the signal from the signal outputting unit.