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US 11,806,995 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.
Claims28
A sheet feeding apparatus, comprising:
- a driving unit configured to rotate a roll in a first direction for feeding a sheet from the roll and in a second direction opposite to the first direction;
- a lower guide configured to support the sheet of the roll from below;
- a first contact unit supported by the lower guide and configured to contact the roll;
- a second contact unit configured to be in contact with the roll at a contact position above the lower guide;
- and
- a detection unit configured to detect a sheet end of the roll in a case where the sheet end of the roll rotated by the driving unit in the second direction passes through the contact position, and the sheet approaches,
- wherein as an operation that automatically feeds the sheet from the roll, in a state in which the first contact unit contacts the roll, the driving unit rotates the roll in the second direction, the detecting unit detects the sheet end that rotates in the second direction, and then the driving unit rotates the roll in the first direction.
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 and in a second direction opposite to the first direction;
- a lower guide configured to support the sheet of the roll from below;
- a first contact unit supported by the lower guide and configured to contact the roll;
- a second contact unit configured to be in contact with the roll at a contact position above the lower guide;
- a detection unit configured to detect a sheet end of the roll in a case where the sheet end of the roll rotated by the driving unit in the second direction passes through the contact position, and the sheet approaches;
- and
- a printing unit configured to print an image on the sheet fed by rotating the roll in the first direction by the driving unit,
- wherein as an operation that automatically feeds the sheet from the roll, in a state in which the first contact unit contacts the roll, the driving unit rotates the roll in the second direction, the detecting unit detects the sheet end that rotates in the second direction, and then the driving unit rotates the roll in the first direction.
5 more elements
Dependencies are inferred from the claim text.