An image scanner includes a transparent plate, a scanning device, a driving device, a positioning member, a light absorbing portion and a white reference portion. The transparent plate has an original placing surface. The scanning device irradiates an original with light by means of a light source and scans reflected light from the original. The driving device reciprocates the scanning device along the transparent plate. The positioning member positions the original placed on the original placing surface of the transparent plate. The light absorbing portion, which is disposed on the original placing surface side of the positioning member and at substantially a central portion of the positioning member in moving directions of the scanning device, absorbs ambient light entering to the original placing surface side of the positioning member through the transparent plate. The white reference portion is provided to the original placing surface side of the positioning member.

An image scanner includes a transparent plate, a scanning device, a driving device, a positioning member, a light absorbing portion and a white reference portion. The transparent plate has an original placing surface. The scanning device irradiates an original with light by means of a light source and scans reflected light from the original. The driving device reciprocates the scanning device along the transparent plate. The positioning member positions the original placed on the original placing surface of the transparent plate. The light absorbing portion, which is disposed on the original placing surface side of the positioning member and at substantially a central portion of the positioning member in moving directions of the scanning device, absorbs ambient light entering to the original placing surface side of the positioning member through the transparent plate. The white reference portion is provided to the original placing surface side of the positioning member.

An image reading device includes a contact glass, a document transport device, a first reading module, a second reading module, a opposite roller, and roller holders. The opposite roller transports a document while keeping it in close contact with an image reading surface of the second reading module arranged inside the document transport device. The roller holders rotatably support the opposite roller, and on their faces facing the second reading module, a pair of patterns for detection is provided to detect the inclination of the opposite roller. The patterns for detection are each formed to be increasingly wide toward a first end side in the axial direction upstream from an intersection in a central part thereof in the document transport direction, and increasingly wide toward a second end side opposite from the first end side downward from the intersection in the document transport direction.

A scanning device comprises a scan assembly, a control processor and an output interface. The scan assembly comprises two scanner modules for scanning front and reverse sides of a data medium to obtain front side analog data and reverse side analog data. The control processor electrically connected to the scan assembly controls the scan assembly, and executes an analog-to-digital converting process to convert the front side analog data and the reverse side analog data into front side digital data and reverse side digital data. The output interface electrically connected to the control processor outputs even sets of digital data, comprising the front side digital data and the reverse side digital data, to an image forming apparatus, so that the image forming apparatus performs even-set data typesetting and outputting after the even sets of digital data are completely outputted. An image forming system using the scanning device is also disclosed.

An image scanner includes a stationary original plate on which a stationary original is placed and a moving original plate, over which a moving original is conveyed, aligned with the stationary original plate in a sub-scanning direction and tilted relative to the stationary original plate by a given angle. A reader is movable in the sub-scanning direction between a stationary original reading span disposed opposite the stationary original via the stationary original plate to read an image on the stationary original and a moving original reading position disposed opposite the moving original via the moving original plate to read an image on the moving original. The reader pressingly contacts the stationary original plate and the moving original plate as the reader moves in the sub-scanning direction.

An image reading apparatus includes: a light emission section including a light emitting element, and a light guiding member configured to irradiate a sheet with light emitted from the light emitting element; a reading section configured to read an image formed on the sheet; a heat dissipation section configured to dissipate heat of the light emitting element; and a cooling section configured to cool the heat dissipation section, in which the light emitting element and the heat dissipation section are disposed at positions outside a sheet passing region of the sheet in the width direction.

An image reading apparatus comprises a first reading section; a second reading section; a conveyance section which conveys the sheet sequentially to the first reading section and the second reading section; a control section which executes a first storage operation of storing image data read by the first reading section in a storage section and a second storage operation of storing image data read by the second reading section in the storage section, determines whether the reading operations of the first reading section and the second reading section, the first and the second storage operations are ended normally and deletes, if any one of the operations is not ended normally, the image data of the sheet not scanned normally stored in the storage section.

A double-sided image reading device that reads an image on a first side of a document when the document that is being delivered through a feeding path passes a first reading part and thereafter reads an image on a second side of the document opposite to the first side when the document passes a second reading part, the double-sided image reading device including: an S-shaped path provided between the first reading part and the second reading part of the feeding path and including a lower end of a first curved path in a document feeding direction and an upper end of a second curved path curved to the side opposite to the first curved path in the document feeding direction connected to each other; and a pressing guide configured to press the document that is being delivered through the first curved path.

When an image on an original document placed on the original document table is scanned, a scanning device is moved along the original document table, starting from a first position, while an image on the original document fed by the automatic document feeder is scanned, the scanning device located at a second position. When an original document sensor detects the original document at a particular position in the automatic document feeder, the scanning device is moved to the second position, while when the original document sensor does not detect the original document at the particular position after scanning of the original document placed on the original document table has completed and before the scanning device is returned to the first position, the scanning device is located at the first position, on condition that the controller executes the first scanning process and a continuous scanning mode is effected.

An image reading apparatus includes a first unit, a second unit that is pivotable against the first unit, and a controller. The first unit includes a platen, a member, and a movable first reader. The second unit includes an original tray, a conveyance unit that conveys an original from the original tray, a static second reader. The controller determines an opening/closing state of the second unit against the first unit based on read data obtained when the second reader reads the member. The first reader reads the first side of an original conveyed by the conveyance unit and the second reader reads the second side of the original when the original placed on the original tray is read. The first reader reads the first side while moving under the original when the original placed on the platen is read.