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US 5,491,421 AGranted
Sheet thickness measuring apparatus which measures sheet thickness based on calculated capacity and resistence values of the sheet
AssigneeCanon Kabushiki Kaisha
InventorIchiro Katsuie
Life of this patent
Estimating the term…
Abstract
A sheet thickness measuring apparatus includes an electrostatic capacity measuring device for measuring the eletrostatic capacity of a sheet, a resistance measuring device for measuring a resistance value of the sheet, and a calculator for calculating a thickness of the sheet on the basis of the electrostatic capacity measured by the electrostatic capacity measuring device and the resistance value measured by the resistance measuring device.
Claims13
A sheet thickness measuring apparatus comprising:
- electrostatic capacity measuring means for measuring the electrostatic capacity of a sheet;
- resistance measuring means for measuring a resistance value of the sheet;
- and
- calculation means for calculating a thickness of the sheet on the basis of the electrostatic capacity measured by said electrostatic capacity measuring means and the resistance value measured by said resistance measuring means.
1 more element
A sheet thickness measuring apparatus comprising:
- electrostatic capacity measuring means for generating a signal with respect to an electrostatic capacity of a sheet whose thickness is to be measured;
- resistance measuring means for generating a signal with respect to a resistance value of the sheet;
- and
- calculation means for calculating a thickness of the sheet on the basis of the signal of the electrostatic capacity and the signal of the resistance value generated by said electrostatic capacity measuring means and said resistance measuring means, respectively.
1 more element
Dependencies are inferred from the claim text.