Patent application number | Description | Published |
20100149603 | IMAGE READING APPARATUS - An image reading apparatus includes: a partial pre-scanning device configured to convey a reading unit in an edge detection area and causes the reading unit to execute a reading operation in the edge detection area, the edge detection area being a partial area within a scannable area on a platen, and a detecting device configured to detect a plurality of edge pixels on a basis of image data, the plurality of edge pixels representing a side of a document, the image data being outputted by the reading unit that reads the edge detection area through execution of the reading operation by the partial pre-scanning device. Upon the plurality of edge pixels not detected on the basis of the image data, the partial pre-scanning device moves the edge detection area in a conveying direction of the reading unit and causes the reading unit to execute the reading operation. | 06-17-2010 |
20100165424 | IMAGE READING DEVICE HAVING IMAGE SENSOR - The image reading device includes a first document member, a white reference plate, an image sensor, a conveying section, and a control section. A first document is placed on the first document member. The image sensor reads the first document placed on the first document member. The conveying section conveys the image sensor in a first direction and a second direction opposite to the first direction. The image sensor reads the first document while being moved in the first direction. The control section executes a first control. The first control executes a process to control the image sensor to read the white reference plate, to control the conveying section to move the image sensor in the second direction, to control the conveying section to start moving the image sensor in the first direction, and to control the image sensor to read the first document, in this order. | 07-01-2010 |
20120081761 | IMAGE READER CAPABLE OF DETECTING BLANK DOCUMENT SHEET - An image reader includes a reading unit that is configured to read an image on a document sheet to generate read data, a counting unit that is configured to count a number of pixels of the read data having more than a predetermined gray level, a determining unit that determines that the document sheet is blank when the number of pixels counted by the counting unit is not exceeding a threshold value, a display unit that is configured to display the number of pixels counted by the counting unit and the threshold value when the document sheet has been determined to be blank, in a manner that the number of pixels can be compared with the threshold value, and a changing unit that changes the threshold value. | 04-05-2012 |
20130083365 | Image-Reading Device and Computer-Readable Storage Medium - An image-reading device may include a conveyor, a reading unit, and a control device. The control device may be configured to extract feature points from an area between a first edge and a line, obtain the density of the extracted feature points, and compare the density to a threshold. The control device may be further configured to identify the first edge as a document leading edge or a document trailing edge based on the comparison result. | 04-04-2013 |
20130258425 | IMAGE READING DEVICE STABILIZING QUALITIES OF READ IMAGES - An image reading device includes a conveying unit, reading unit, and a control unit. The conveying unit conveys successive two sheets along a conveying path such that a gap is formed between the successive two sheets. The reading unit reads a sheet conveyed at a reading position in the conveying path. The reading unit has a light source and light-receiving unit. The control unit controls the light source to emit light at a first light intensity for a sheet that has reached the reading position. The light-receiving unit receives light reflected by the sheet present at the reading position. The control unit further controls the light source to emit a light at a second light intensity lower than the first light intensity during a period of time from when the reading unit has been read the preceding sheet to when the reading unit begins reading the subsequent sheet. | 10-03-2013 |
20140063518 | SHEET CONVEYING DEVICE CAPABLE OF DISCHARGING SHEET FROM CONVEYING PATH AT STARTUP - A sheet conveying device includes: a conveying unit; a nonvolatile memory; and a controller. The conveying unit is configured to convey a sheet along a conveying path. The controller is configured to control the conveying unit to convey the sheet, store position data in the nonvolatile memory during conveyance of the sheet, determine whether or not the sheet conveying device is started, and drive the conveying unit for an amount determined by the position data if the sheet conveying device is started. The conveying path is divided into a plurality of segments. The position data identifies a segment in which the sheet stays. The more downstream the segment identified by the position data is in the conveying path, the smaller the amount determined by the position data is. | 03-06-2014 |
20140138897 | IMAGE READING APPARATUS HAVING CONVEYANCE ROLLERS CONVEYING ORIGINAL SHEET - In an image reading apparatus, it is judged whether an original sheet is a first sheet type, whose sheet length is longer than or equal to a first conveyance distance and shorter than a second conveyance distance, and a second sheet type, whose sheet length is longer than or equal to the second conveyance path, the first conveyance distance being a distance between a first conveyance roller and a second conveyance roller, the second conveyance distance being a distance between a supply roller and the second conveyance roller. At least one of a leading-edge arriving timing; a trailing-edge arriving timing; and a sub-scanning magnification is set dependently on the judged result. An image is read from the original sheet by using an image reading unit and a conveyance unit based on the set at least one of the leading-edge arriving timing; trailing-edge arriving timing; and sub-scanning magnification. | 05-22-2014 |
20140138898 | IMAGE READING APPARATUS THAT READS ORIGINAL SHEET WHILE CONVEYING THE SAME - In an image reading apparatus, it is judged whether an original sheet is either one of a first sheet type, whose sheet length is longer than or equal to a first conveyance distance and shorter than a second conveyance distance, and a second sheet type, whose sheet length is longer than or equal to the second conveyance path, the first conveyance distance being distance between a first conveyance roller and a second conveyance roller, the second conveyance distance being distance between a supply roller and the second conveyance roller. The original sheet is conveyed at a separation timing, when the original sheet separates away from the supply roller, at a speed that is smaller for a case where the original sheet is of the first sheet type than for a case where the original sheet is of the second sheet type. An image is read from the conveyed original sheet. | 05-22-2014 |