Sheet material information detection apparatus and sheet material processing apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTakehiko Kawasaki, Norio Kaneko
Life of this patent
Estimating the term…
Abstract
A motor rotates a cam, thereby pulling up an external force application member while compressing an application spring. After that, the motor releases the external force application member to impact a sheet material. An impact force caused at a time when an external force receiving member receives an external force application member through the sheet material is detected by a piezoelectric element. When an electric power supply to the motor is stopped, a retraction spring allows the motor to idle through a wheel and rotates the cam to allow the external force application member to retract to a highest position.
Claims10
A sheet material information detection apparatus, comprising:
- an external force application member for applying an external force to a sheet material;
- an external force receiving member for receiving the external force through an intermediation of the sheet material;
- a driving unit, to which an electric power is supplied, for driving the external force application member;
- and
- a gap control mechanism for widening a gap between at least one of the external force application member and the external force receiving member, and the sheet material when the electric power is reduced.
Dependencies are inferred from the claim text.