Sheet discriminating apparatus and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMasahiro Serizawa, Hidehiko Kinoshita, Hitoshi Kato, Katsuyuki Yamazaki, Kenji Morita, Yuichi Yamamoto
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Abstract
A sheet discriminating apparatus includes a pair of conveying rotary members for conveying a sheet while rotating with the sheet sandwiched between the pair of conveying rotary members, a vibration detecting sensor for detecting vibrations of the pair of conveying rotary members. The sheet discriminating portion further includes a discriminating portion for making a discrimination in a type of the sheet based on the vibrations detected by the vibration detecting sensor.
Claims8
A sheet discriminating apparatus comprising:
- a pair of conveying rotary members for conveying a sheet while rotating with the sheet sandwiched between the pair of conveying rotary members;
- a vibration detecting sensor for detecting vibrations of the pair of conveying rotary members;
- and
- a discriminating portion for making a discrimination in a thickness of the sheet based on the vibrations detected by the vibration detecting sensor, wherein the discriminating portion makes a discrimination in the thickness of the sheet based on vibrations of the pair of conveying rotary members which are detected by the vibration detecting sensor when a rear end of the sheet passes through the pair of conveying rotary members.
An image forming apparatus comprising:
- a pair of conveying rotary members for conveying a sheet while rotating with the sheet sandwiched between the pair of conveying rotary members;
- a vibration detecting sensor for detecting vibrations of the pair of conveying rotary members;
- an image forming portion for forming an image on the sheet conveyed by the pair of conveying rotary members;
- and
- a control portion for making a discrimination in a thickness of the sheet based on the vibrations detected by the vibration detecting sensor when a rear end of the sheet passes through the pair of conveying rotary members and controlling the image forming portion to change an image forming condition of the image forming portion in accordance with the thickness of the sheet in which the discrimination has been made.
Dependencies are inferred from the claim text.