According to one embodiment, an image forming apparatus includes a document platen, a document cover for covering the document platen during scanning, the document cover having a through-hole into which an original document can be inserted for placement on the document platen for scanning while the document cover is covering the document platen, a scanner that scans the original document on the document platen to image data corresponding to the original document, and a printing unit that prints an image of the original document corresponding to the image data obtained by the scanner.

An exposure head according to one or more embodiments may include: a light emitting element board on which light emitting elements are arranged; a holder that holds the light emitting element board and is provided with an opening; a transparent cover arranged at a position to shield the opening, such that a first attachment surface of the holder is attached to a second attachment surface of the transparent cover by using an adhesive; and an optical system arranged between the light emitting element board and the transparent cover. The exposure head satisfies an expression defined as 1<2, where 1 is a contact angle on the first attachment surface representing wettability of the first attachment surface, and 2 is a contact angle on the second attachment surface representing wettability of the second attachment surface.

An exposure head according to one or more embodiments may include: a light emitting element board on which light emitting elements are arranged; a holder that holds the light emitting element board and is provided with an opening; a transparent cover arranged at a position to shield the opening, such that a first attachment surface of the holder is attached to a second attachment surface of the transparent cover by using an adhesive; and an optical system arranged between the light emitting element board and the transparent cover. The exposure head satisfies an expression defined as 1<2, where 1 is a contact angle on the first attachment surface representing wettability of the first attachment surface, and 2 is a contact angle on the second attachment surface representing wettability of the second attachment surface.

An imager is provided. The imager has an imaging platen which presents an imaging surface against which an object to be imaged can be placed. The imaging platen has a photodetector layer and a light guiding layer operable to guide light towards the object. The imager includes a light source operable to emit light into the light guiding layer. The light source is located at an edge of the light guiding layer, to guide light into the light guiding layer of the imaging platen.

An image reading apparatus includes an image reading unit, a document pressing unit, a first position detection unit, a second position detection unit, and a controller. The image reading unit reads an image of a document. The document pressing unit presses the document against a document placement component. The first position detection unit detects a first closed position at which the document pressing unit is not in contact with the document placement component. The second position detection unit detects a second closed position that is closer to the document placement component than the first closed position is. The controller performs first width detection on the document and further performs second width detection. The first width detection is performed in accordance with detection performed by the first position detection unit on a closing operation of the document pressing unit. The second width detection is performed after elapse of a predetermined time in accordance with detection performed by the second position detection unit on the closing operation of the document pressing unit. If the controller receives an image reading instruction before the elapse of the predetermined time, the controller performs the second width detection without waiting for the elapse of the predetermined time and starts an image reading process.

An image reading device has a document placement stage, a light source unit, and a sensor unit. The light source unit has a first light source part having a first light source at one end in the main scanning direction and a first light guide, a second light source part having a second light source at the other end in the main scanning direction and a second light guide, a first board where the first light source is mounted, and a second board where the second light source is mounted. The first and second boards each have a board base, a mounting part where the first or second light source is mounted, and a reflection face formed next to the first or second light source. The reflection faces of the first and second board faces face, to overlap the facing faces of the second and first light guides.

A reading device includes: a housing including a transparent flat plate on an upper surface on which an object to be read is placed; a reading unit that reads information on the object to be read by coming into contact with a lower surface of the transparent flat plate inside the housing; a movement unit that causes the reading unit to move back and forth within a scan area inside the housing; and a motor that provides power to the movement unit inside the housing. The motor is disposed to overlap with the reading unit along upward and downward directions inside the housing.

A reading device includes: a transparent flat plate with an upper surface on which an object to be read is placed; a reading unit reading information on the object while moving in contact with a transparent flat plate lower surface; a retainer retaining the reading unit by urging the reading unit to be pressed against the lower surface; a guide member supporting and guiding the retainer along a movement direction at a time of reading by the reading unit; and a positioning structural member in at least one end of the reading unit and the retainer in a direction crossing the movement direction to position the reading unit to be maintained being displaceable relative to the retainer in a direction to be closer to and in a direction to be away from the transparent flat plate and being non-displaceable upstream and downstream in the movement direction.

An image forming apparatus includes: an image forming section that forms an image on a document; a first ejection section that ejects the document on which the image has been formed; an exterior portion which is movable and a part of which constitutes an exterior of the apparatus; an entrance portion that is exposed by movement of the exterior portion and that constitutes an entrance for the document to be transported to an image reading section that reads the image formed on the document; the image reading section that reads the image formed on the document transported after the entrance portion is exposed; and a second ejection section that ejects the document which has been read by the image reading section. An ejecting direction of the first ejection section, an ejecting direction of the second ejection section, and a moving direction of the exterior portion coincide with each other.

An image forming apparatus includes an image reading device, a holding member that is rod-like, and an image forming device having an image forming unit that forms an image on a sheet, and having a wall part having a hole. The image reading device reads an image on a document, is provided on the image forming device, and rotates around a rotation shaft openable and closable with respect to the image forming device. The holding member has one end attached on the image reading device, and holds the image reading device opened with respect to the image forming device when another end of the holding member is inserted into the hole formed in the wall part. The holding member includes a first regulation part that comes into contact with a lower surface of the wall part to regulate detachment of the other end of the holding member from the hole.