Sheet property measurement device and image forming apparatus including sheet property measurement device
AssigneeCanon Kabushiki Kaisha
InventorRyuichi Araki
Life of this patent
Estimating the term…
Abstract
A sheet property measurement device includes a passage configured to allow a sheet to be manually inserted thereinto; a reading sensor configured to read a surface of the sheet inserted into the passage; a detection unit having a displacement member configured to be brought into contact with the sheet downstream of a reading position of the reading sensor in an insertion direction in which the sheet is inserted and change in displacement amount depending on a thickness of the sheet, the detection unit being configured to detect the displacement amount of the displacement member; a sheet sensor configured to detect the sheet that has arrived at a detection position downstream of the displacement member in the insertion direction; and a controller.
Claims12
A sheet property measurement device comprising:
- a passage configured to allow a sheet to be manually inserted thereinto;
- a reading sensor configured to read a surface of the sheet inserted into the passage;
- a detection unit having a displacement member configured to be brought into contact with the sheet downstream of a reading position of the reading sensor in an insertion direction in which the sheet is inserted and change in displacement amount depending on a thickness of the sheet, the detection unit being configured to detect the displacement amount of the displacement member;
- a sheet sensor configured to detect that the sheet has arrived at a detection position downstream of the displacement member in the insertion direction;
- and
- a controller configured to:
- control the reading sensor to read the surface of the sheet a plurality of times during a period in which the sheet is being inserted;
- determine a property of the surface of the sheet based on reading results excluding reading results obtained during a predetermined period from among reading results obtained by the reading sensor the plurality of times, the predetermined period being a period that precedes a timing at which the sheet is detected by the sheet sensor;
- and
- determine a plurality of candidates for a type of the sheet based on the properties of the surface of the sheet and the thickness of the sheet, the thickness of the sheet being determined based on a detection result from the detection unit.
An image forming apparatus for forming an image on a sheet based on image forming conditions, the image forming apparatus comprising:
- a passage configured to allow a sheet to be manually inserted thereinto;
- a reading sensor configured to read a surface of the sheet inserted into the passage;
- a detection unit having a displacement member configured to be brought into contact with the sheet downstream of a reading position of the reading sensor in an insertion direction in which the sheet is inserted and change in displacement amount depending on a thickness of the sheet, the detection unit being configured to detect the displacement amount of the displacement member;
- a sheet sensor configured to detect the sheet that has arrived at a detection position downstream of the displacement member in the insertion direction;
- a display;
- and
- a controller configured to:
- control the reading sensor to read the surface of the sheet a plurality of times during a period in which the sheet is being inserted;
- control the display to display a plurality of candidates for a type of the sheet based on reading results excluding reading results obtained during a predetermined period from among reading results obtained by the reading sensor the plurality of times, the predetermined period being a period that precedes a timing at which the sheet is detected by the sheet sensor;
- and
- control the image forming conditions based on information relating to the type of the sheet selected from among the plurality of candidates displayed on the display.
An image forming apparatus for forming an image on a sheet based on image forming conditions, the image forming apparatus comprising:
- a passage configured to allow a sheet to be manually inserted thereinto;
- a reading sensor configured to read a surface of the sheet inserted into the passage;
- a sheet sensor configured to detect the sheet that has arrived at a detection position upstream of a reading position of the reading sensor with respect to an insertion direction in which the sheet is inserted;
- a display;
- and
- a controller configured to:
- control the reading sensor to read the surface of the sheet a plurality of times during a period in which the sheet is being drawn out in a direction opposite to the insertion direction in which the sheet is inserted;
- control the display to display a plurality of candidates for a type of the sheet based on reading results excluding reading results obtained during a predetermined period from among reading results obtained by the reading sensor the plurality of times, the predetermined period being a period that precedes a timing at which the sheet is detected by the sheet sensor;
- and
- control the image forming conditions based on information relating to the type of the sheet selected from among the plurality of candidates displayed on the display.
Dependencies are inferred from the claim text.