Image forming apparatus and method of reading test sheet
AssigneeSharp Kabushiki Kaisha
InventorTakenori OHTOSHI
Life of this patent
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Abstract
An image forming apparatus automatically adjusts a printing distance from a sheet edge on the basis of a result obtained by reading, with a reader, a test sheet printed by an image former. The image former prints a solid cover sheet of a predetermined color other than white having a void portion on four sides. The test sheet is placed on OC glass having a first size guide and a second size guide on its periphery, in alignment with the origin of the first size guide and the second size guide. The reader reads the test sheet in a state in which the cover sheet is placed on the test sheet so that the void portion is disposed outside the first size guide and the second size guide.
Claims10
An image forming apparatus comprising:
- a reader that reads a test sheet printed by an image former, the image forming apparatus automatically adjusting a printing distance from a sheet edge based on a result of reading the test sheet, wherein, the reader comprises:
- OC glass;
- and
- an OC frame disposed around the OC glass and including a first size guide and a second size guide, the test sheet is placed on the OC glass of the reader so as to be aligned with an origin between the first size guide and the second size guide, and the test sheet is read in a state in which a rectangular cover sheet is placed to cover the test sheet in such a manner that two sides of the cover sheet on the side of the origin are disposed outside a reading area on the side of the first size guide and the second size guide, the cover sheet being coated with a predetermined color other than white.
A method of reading a test sheet when a printing distance from a sheet edge is automatically adjusted based on a result of reading, by a reader, the test sheet on which an image is formed by an image former, the method comprising:
- placing the test sheet having a rectangular shape on a rectangular reading area in alignment with an origin between a first size guide and a second size guide of an OC frame including the first size guide and the second size guide surrounding the reading area;
- placing a rectangular cover sheet on the test sheet such that two sides of the cover sheet on the side of the origin are disposed outside the reading area on the side of the first size guide and the second size guide, the cover sheet being coated with a predetermined color other than white;
- and
- causing the reader to read the test sheet in a state in which the cover sheet is placed on the test sheet.
Dependencies are inferred from the claim text.