Image forming device, document feeder, and method of determining sheet size
OwnerMakoto ODANIinventor
Life of this patent
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Abstract
An image forming device includes a tray on which a sheet is to be placed and including a plurality of first electrodes arranged along a first direction, a sheet guide including a conductor and movable along the first direction to different positions relative to the first electrodes, a detection circuit electrically connected to each of the first electrodes and configured to detect an amount of electric charge in each of the first electrodes, a printer configured to form an image on the sheet supplied from the tray, and a processor configured to determine a size of the sheet placed on the tray based on amounts of electric charge detected by the detection circuit, and control the printer to form an image on the sheet using the determined size.
Claims20
An image forming device, comprising:
- a tray on which a sheet is to be placed and including a plurality of first electrodes arranged along a first direction;
- a sheet guide including a conductor and movable along the first direction to different positions relative to the first electrodes;
- a detection circuit electrically connected to each of the first electrodes and configured to detect an amount of electric charge in each of the first electrodes;
- a printer configured to form an image on the sheet supplied from the tray;
- and
- a processor configured to:
- determine a size of the sheet placed on the tray based on amounts of electric charge detected by the detection circuit, and
- control the printer to form an image on the sheet using the determined size.
A document feeder connectable to an image forming device, comprising:
- a tray on which a sheet is to be placed and including a plurality of first electrodes arranged along a first direction;
- a sheet guide including a conductor and movable along the first direction to different positions relative to the first electrodes;
- a detection circuit electrically connected to each of the first electrodes and configured to detect an amount of electric charge in each of the first electrodes;
- and
- a processor configured to:
- determine a size of the sheet placed on the tray based on amounts of electric charge detected by the detection circuit, and
- output the determined size to the image forming device.
A method of determining a size of a sheet placed on a tray for printing or scanning, the tray including a plurality of first electrodes arranged along a first direction and facing a sheet guide including a conductor and movable along the first direction to different positions relative to the first electrodes, the method comprising:
- detecting an amount of electric charge in each of the first electrodes;
- and
- determining a size of the sheet placed on the tray based on amounts of electric charge detected in each of the first electrodes.
Dependencies are inferred from the claim text.