A method for controlling at least one printer engine is disclosed, the at least one printer engine having plural trays, and wherein each of the plural trays is aligned independently for imaging on a sheet of print medium. The method includes obtaining information according to first conditions in which each of the plural trays has been aligned; obtaining information according to a second condition in which the at least one printer engine executes a print job; judging differences between each of the first conditions and the second condition; selecting a tray for the print job based on the judged differences; and instructing the print engine to execute the print job using the selected tray.

An image reading apparatus (6) includes a document placing table (6a) to an upper surface of which a contact glass (25) is fixed, and a document pressing device (24) supported at an end of the document placing table (6a) to be openable/closable via a hinge portion, and having, on its back surface side, a document presser (30) that presses a document placed on the contact glass (25). The document pressing device (24) includes a light transmission window (31) transmitting light in a front-surface-to-back-surface direction of the document pressing device (24). The light transmission window (31) is disposed at a position not overlapping with the contact glass (25) when the document pressing device (24) is at the closure position, and when the document pressing device (24) has moved in an opening direction from the closure position, light that has passed through the light transmission window (31) reaches the contact glass (25).

In a blast mechanism for optimizing an air blast in the main scanning direction and an air blast in the sub-scanning direction so as not to affect reading accuracy of an image, a first blast path for sending air in the main scanning direction and a second blast path for sending air in the sub-scanning direction are formed inside the housing, and collection efficiencies of air filters of the blast paths are set so that the efficiency in the main scanning direction is high than that in the sub-scanning direction. The blast mechanism includes a casing, first and second blast paths in the main and sub-scanning directions disposed in the casing, and air filters disposed in the respective blast paths. The dust collection efficiencies of the air filters are set so that the filter of the first blast path is higher than the filter of the second blast path.

An image reading apparatus (6) includes a document placing table (6a) to an upper surface of which a contact glass (25) is fixed, and a document pressing device (24) supported at an end of the document placing table (6a) to be openable/closable via a hinge portion, and having, on its back surface side, a document presser (30) that presses a document placed on the contact glass (25). The document pressing device (24) includes a light transmission window (31) transmitting light in a front-surface-to-back-surface direction of the document pressing device (24). The light transmission window (31) is disposed at a position not overlapping with the contact glass (25) when the document pressing device (24) is at the closure position, and when the document pressing device (24) has moved in an opening direction from the closure position, light that has passed through the light transmission window (31) reaches the contact glass (25).

A multi-function apparatus includes a body, an image reading unit, a document cover and a locking member. The image reading unit is movable between a closed position and an opened position. The document cover is movable between a closed position and an opened position. The locking member is movable to a first position and a second position and includes a first engagement portion and a second engagement portion. In response to a movement of the document cover to the opened position, the locking member moves to the first position and locks the image reading unit to the closed position. In response to a movement of the image reading unit to the opened position, the locking member moves to the second position and locks the document cover to the closed position.

There is provided a sheet tray including: first, second and third trays. The second tray moves between a first position and a second position in which an overlapping area is smaller than that obtained in the first position. The third tray includes a third support surface and a fourth support surface. The third support surface includes a protrusion which protrudes upward to be positioned above the first support surface in a state that the third tray is in the first pivoting position. The third tray overlaps with the first support surface in a state that the second tray is in the first position and that at least a part, of the third tray, except for the protrusion is positioned below the first support surface, and the third tray does not overlap with the first support surface in a state that the second tray is in the second position.

An image reading apparatus includes a transparent member including a document placing surface on which a document is placed, a document pressing portion that presses the document placed on the transparent member against the transparent member, a pivot supporting portion that pivotably supports the document pressing portion so as to be pivotable about a pivot shaft with respect to a casing of the image reading apparatus, an image reading unit, an abutment portion against which an edge portion of the document placed on the document placing surface is abutted in order to position the document at a reference position, and an inclined surface. The abutment portion is provided at one portion of a front end on a side far from the pivot supporting portion. The inclined surface is provided at another portion of the front end and inclined upward toward the side far from the pivot supporting portion.

An optical apparatus includes: a body part in which a close-contact optical system type reading section having an image sensor that reads light concentrated by a lens is disposed and in which a document platen glass and a first base contact member are disposed on an upper surface; and a covering part in which a second base contact member is disposed, which comes into contact with the first base contact member to perform base contact through a closing operation of a user and which separates from the first base contact member and releases the base contact through an opening operation of the user.

A printing device includes: a case covering a printing mechanism; and an electrostatic touch panel provided at the case. The touch panel is provided at an angle from horizontal. At a bottom side of the touch panel, a wall for stopping a touch pen rolling down a surface of the touch panel is provided.

An image forming apparatus includes a main board, a power supply board, a base member, a first shielding member and a second shielding member. The main board controls an image forming operation. The power supply board is disposed adjacent to the main board to supply power to the main board. On the base member, the main board and the power supply board are supported. The first shielding member is fixed on the base member so as to cover the main board and the power supply board. The second shielding member is fixed on the base member between the main board and the power supply board.