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US 10,895,839 B2Granted
Image forming apparatus, control method therefor, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorJun Miyajima
Life of this patent
Estimating the term…
Abstract
The number of circulatable sheets and the conveying speed of a sheet are decided by referring to a storage unit which stores the number of circulatable sheets and the conveying speed of a sheet in correspondence with the type and size of a sheet, and the resolution of an image to be printed. It is determined whether the conveying speed of the feed surface of a sheet to be fed next to the printing unit and that of a feed surface to be refed next to the printing unit coincide with each other. It is determined whether the conveying speed of the feed surface of the sheet to be fed next to the printing unit and that of the feed surface or the refeed surface of a sheet immediately previously fed to the printing unit differ from each other.
Claims42
An image forming apparatus comprising:
- a feeding unit configured to feed a plurality of sheets to a conveyance path;
- a conveying unit configured to convey the plurality of sheets fed from the feeding unit along the conveyance path, the conveying unit conveying the plurality of sheets at a first conveying speed in a case where a resolution of an image to be formed is a first resolution, and conveying the plurality of sheets at a second conveying speed, being slower than the first conveying speed, in a case where a resolution of an image to be formed is a second resolution being higher than the first resolution;
- an image forming unit configured to form an image on each of the plurality of sheets in the conveyance path;
- a re-feeding unit configured to re-feed the sheet having the image formed on a first surface thereof to the conveyance path so as to form an image on a second surface thereof;
- and
- a control unit configured to control the re-feeding unit to re-feed a first sheet, which is one of the plurality of sheets, and control the feeding unit to feed a second sheet, which is one of the plurality of sheets and is subsequent to the first sheet, such that:
- the re-feeding of the first sheet to the conveyance path is performed after feeding of the second sheet to the conveyance path in a case where a type and a size of the first sheet and the second sheet are the same, and a resolution of an image on the first surface of the second sheet and a resolution of the first surface of the first sheet are both the first resolution;
- and
- the feeding of the second sheet to the conveyance path is performed after re-feeding of the first sheet to the conveyance path in a case where a type and a size of the first sheet and the second sheet are the same, a resolution of an image on the first surface of the second sheet is the first resolution, and a resolution of an image on the first surface of the first sheet is the second resolution.
6 more elements
An image forming apparatus comprising:
- a feeding unit configured to feed a plurality of sheets to a conveyance path;
- a conveying unit configured to convey the plurality of sheets fed from the feeding unit along the conveyance path, the conveying unit conveying the plurality of sheets at a first conveying speed in a case where a resolution of an image to be formed is a first resolution, and conveying the plurality of sheets at a second conveying speed, being slower than the first conveying speed, in a case where a resolution of an image to be formed is a second resolution being higher than the first resolution;
- an image forming unit configured to form an image on each of the plurality of sheets in the conveyance path;
- a re-feeding unit configured to re-feed the sheet having the image formed on a first surface thereof to the conveyance path so as to form an image on a second surface thereof;
- and
- a control unit configured to control the re-feeding unit to re-feed a first sheet, which is one of the plurality of sheets, and control the feeding unit to feed a second sheet, which is one of the plurality of sheets and is subsequent to the first sheet, such that:
- the re-feeding of the first sheet to the conveyance path is performed after feeding of the second sheet to the conveyance path in a case where a type and a size of the first sheet and the second sheet are the same, and a resolution of an image on the first surface of the second sheet and a resolution of an image on the second surface of the first sheet are both the first resolution;
- and
- the feeding of the second sheet to the conveyance path is performed after re-feeding of the first sheet to the conveyance path in a case where a type and a size of the first sheet and the second sheet are the same, a resolution of an image on the first surface of the second sheet is the first resolution, and a resolution of an image on the second surface of the first sheet is the second resolution.
6 more elements
The image forming apparatus according 15, wherein the second sheet is a lead sheet waiting for feeding.
An image forming apparatus comprising:
- a feeding unit configured to feed a plurality of sheets to a conveyance path;
- a conveying unit configured to convey the plurality of sheets fed from the feeding unit along the conveyance path, the conveying unit conveying the plurality of sheets at a first conveying speed in a case where a resolution of an image to be formed is a first resolution, and conveying the plurality of sheets at a second conveying speed, being slower than the first conveying speed, in a case where a resolution of an image to be formed is a second resolution being higher than the first resolution;
- an image forming unit configured to form an image on each of the plurality of sheets in the conveyance path;
- a re-feeding unit configured to re-feed the sheet having the image formed on a first surface thereof to the conveyance path so as to form an image on a second surface thereof;
- and
- a control unit configured to control the re-feeding unit to re-feed a first sheet, which is one of the plurality of sheets, and control the feeding unit to feed a second sheet, which is one of the plurality of sheets and is subsequent to the first sheet such that:
- the re-feeding of the first sheet to the conveyance path is performed after feeding of the second sheet to the conveyance path in a case where a type and a size of the first sheet and the second sheet are the same, and a resolution of an image on the first surface of the second sheet and a resolution of an image on the second surface of the second sheet are both the first resolution;
- and
- the feeding of the second sheet to the conveyance path is performed after re-feeding of the first sheet to the conveyance path in a case where a type and a size of the first sheet and the second sheet are the same, a resolution of an image on the first surface of the second sheet is the first resolution, and a resolution of an image on the second surface of the second sheet is the second resolution.
6 more elements
Dependencies are inferred from the claim text.