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US 11,230,125 B2Granted
Printing apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMasato Eiyama, Yuki Igarashi, Masashi Kamada, Masashi Negishi, Ryoya Shinjo, Ryo Kobayashi, Tomohiro Suzuki, Tsutomu Obata
Life of this patent
Estimating the term…
Abstract
A roll sheet with a continuous sheet wound in a roll form is rotated in a forward direction to supply the sheet to a printing unit. A sensor whose output is changed in accordance with a distance between the sensor and the sheet is used. A rotation direction of the roll sheet is switched from an opposite direction to the forward direction on the basis of the output of the sensor during rotation of the roll sheet in the opposite direction.
Claims25
A sheet feeding apparatus, comprising:
- a driving unit configured to rotate a roll in a first direction for feeding a sheet from the roll, which is formed by winding the sheet, and in a second direction for winding the sheet, the second direction being opposite to the first direction;
- a detecting unit configured to detect the sheet of the roll rotating in the second direction;
- a lower guide that supports the sheet fed from the roll from below;
- and
- a contact member configured to contact the roll rotating in the second direction,
- wherein the direction of rotation of the roll is changed by the driving unit from the second direction to the first direction according to an output from the detecting unit, and
- the contact member is supported by the lower guide on an upstream side of the detecting unit with respect to a direction in which the sheet is fed from the roll rotating in the first direction.
4 more elements
A sheet feeding apparatus comprising:
- a driving unit configured to rotate a roll in a first direction for feeding a sheet from the roll, which is formed by winding the sheet, and in a second direction opposite to the first direction;
- a detecting unit configured to detect the sheet of the roll rotating in the second direction;
- a lower guide that supports the sheet fed from the roll from below;
- a contact member configured to contact the roll rotating in the second direction;
- a pressing member for pressing the lower guide;
- and
- a switching unit configured to switch a force of pressing the lower guide by the pressing member,
- wherein the direction of rotation of the roll is changed by the driving unit from the second direction to the first direction according to an output from the detecting unit, and
- the contact member is supported by the lower guide on an upstream side of the detecting unit with respect to a direction in which the sheet is fed from the roll.
6 more elements
A sheet feeding apparatus, comprising:
- a driving unit configured to rotate a roll in a first direction for feeding a sheet from the roll, which is formed by winding the sheet, and in a second direction opposite to the first direction;
- a detecting unit configured to detect the sheet of the roll rotating in the second direction;
- and
- a guide that supports the sheet fed from the roll from below,
- wherein the direction of rotation of the roll is changed by the driving unit from the second direction to the first direction according to an output of the detecting unit,
- the detecting unit is provided on the guide, and
- the guide moves according to a change in an outer diameter of the roll by being pressed by the outer diameter of the roll.
4 more elements
A printing apparatus comprising:
- a driving unit configured to rotate a roll in a first direction for feeding a sheet from the roll, which is formed by winding the sheet, and in a second direction for winding the sheet, the second direction being opposite to the first direction;
- a detecting unit configured to detect the sheet of the roll rotating in the second direction;
- a lower guide that supports the sheet fed from the roll from below;
- a contact member for contacting the roll rotating in the second direction;
- and
- a printing unit configured to print an image on a sheet, the printing unit being positioned on a downstream side, with respect to a sheet feeding direction, of the lower guide,
- wherein the direction of rotation of the roll is changed by the driving unit from the second direction to the first direction according to an output from the detecting unit, and
- the contact member is supported by the lower guide on an upstream side of the detecting unit, with respect to a direction in which the sheet is fed from the roll rotating in the first direction.
5 more elements
Dependencies are inferred from the claim text.