A printing apparatus includes: a sheet discharge tray having an upstream portion tilted to extend downward in a direction of gravity; an upper member limiting a height of a space above the sheet discharge tray; a full sensor configured to detect an upstream end of a top sheet of sheets stacked on the sheet discharge tray; a counter configured to count a number of the sheets discharged onto the sheet discharge tray; and a controller. The controller determines whether to stop discharging of the sheets to the sheet discharge tray, based on a detection result of the full sensor upon the sheets to be stacked on the sheet discharge tray including only sheets each with uniform thickness and based on a count value of the counter upon the sheets to be stacked on the sheet discharge tray including a sheet with thickness varying partly.

A conveyor, including: receiving trays; a conveyance mechanism; and a support supporting the trays, wherein at least one tray except a lowermost tray is supported so as to be selectively positioned at one of a receiving position and an upper position, wherein at least one lower tray except an uppermost tray includes a protruding portion attached to a tray body so as to be selectively positioned at one of a protruding position and a retracted position, and wherein the conveyor includes a force transmitting mechanism for effectuating at least one of (a) a retracting movement of the protruding portion of one of the at least one lower tray from the protruding position to the retracted position caused by an upward movement of an adjacent upper tray disposed just above and immediately adjacent to the one of the at least one lower tray from the receiving position to the upper position.

A sheet discharge apparatus includes a discharge unit, a supporting portion, and a regulation portion. The discharge unit is configured to discharge a sheet. The supporting portion is configured to support the discharged sheet. The regulation portion is configured to regulate a trailing edge position of the discharged sheet in a sheet discharge direction. The supporting portion includes a base surface, a first projection portion, and a second projection portion. The first projection portion projects from the base surface, is disposed downstream of the regulation portion in the sheet discharge direction, and extends in a width direction orthogonal to the sheet discharge direction. The second projection portion projects from the base surface, is disposed downstream of the first projection portion in the sheet discharge direction with a predetermined interval from the first projection portion, and is shorter than the first projection portion in the width direction.

A sheet stacking tray includes a first stacking portion, a second stacking portion, and a base portion. In a sheet widthwise direction perpendicular to the sheet discharge direction, the first stacking portion includes a first sheet stacking surface having a first stacking width within a range from one half of a sheet width of a maximum-size sheet to be discharged up to the sheet width of the maximum-size sheet. The second stacking portion includes a second sheet stacking surface having a second stacking width smaller than the first stacking width. A border between the first stacking portion and the second stacking portion lies on a discharge-direction upstream side of a contact point where a leading end portion of the maximum-size sheet comes into contact with the sheet stacking part while the sheet is discharged.

A sheet processing apparatus includes a first and second alignment members that moves relatively in a width direction to align a position of a sheet in the width direction. Each alignment member includes a contact surface configured to come in contact with an end of the sheet in the width direction, a lower portion configured to support a lower surface of the sheet, and an upper portion facing an upper surface of the sheet. For each of the first and second alignment members, the lower portion is more distant from the contact surface than the upper portion in the width direction, the lower portion is positioned above a lower end of the contact surface in a gravity direction, and a distance between the upper portion and the lower portion in the gravity direction is smaller than a length of the contact surface in the gravity direction.

A medium discharge device includes a discharge roller pair that is provided with a discharge driving roller and a discharge driven roller which drivably rotates in contact with the discharge driving roller, and a medium receiving tray which receives the medium that is fed and discharged by the discharge roller pair, in which the medium receiving tray includes a guide member which guides such that a tip end of the medium which is discharged from the discharge roller pair enters the medium mounting surface at a predetermined angle, and the guide member is provided to be elastically displaceable in an advancing and retreating direction with respect to the medium mounting surface of the medium receiving tray and is displaced in a direction coming close to the medium mounting surface according to raising of a pressing load due to the medium that is discharged to the medium receiving tray.

An adjustable tray includes a first board, a second board and an adjustment component. The second board is pivoted on the first board, and the second board has at least one first position section and at least one second position section. The adjustment component includes a main part and at least one abutted part connected to each other. A first distance is between the first position section and the first board. A second distance is between the second position section and the first board. The first distance is different from the second distance. The main part is movably disposed on the first board for positioning the abutted part at the first position section or the second position section to pivot the second board with a first angle or a second angle between the first board and the second board, and the first angle is different from the second angle.

A sheet feeding device includes a document mounting board, in which a downstream end of the document mounting board in the feeding direction of the documents in the feed mechanism is connected to a scanner body so as to be rotatable about a first turning shaft parallel to a rotation shaft of a pickup roller, the first turning shaft is located downstream from the feed mechanism in the feeding direction of the documents in the feed mechanism, a mounting surface of the document mounting board on which the documents are mounted is located above the pickup roller when the documents are mounted on the document mounting board, and the document mounting board turns about the first turning shaft such that the mounting surface moves downward and the mounting surface moves downward from a contact portion of the pickup roller with the document when the documents mounted on the document mounting board are fed.

In a sheet feeding device, a document mounting board includes a first member that includes a first mounting surface and is located on the feed mechanism side in the feeding direction of the documents in the feed mechanism, the first mounting surface being inclined to a lower side toward the feed mechanism, and a second member that includes a second mounting surface on which the documents are mounted and is disposed on a side opposite to the side of the first member on which the feed mechanism is located, and the second member is connected to the first member to be rotatable about a second turning shaft and turns about the second turning shaft depending on the weight of the documents detected by the weight sensor to change an angle with respect to the first member.

A discharge device includes a placement part on which a medium discharged from an apparatus body is placed and from which the medium is returned to the apparatus body, a loading part which is disposed on a lower side of the placement part to have a space between the loading part and the placement part and on which the medium discharged to the space from the apparatus body in a predetermined discharge direction is loaded, a support portion that is provided on the loading part to protrude toward an upper side of the loading part, includes an inclined surface having an upward gradient toward a downstream side in the discharge direction, and supports the medium which is loaded on the loading part at an upper end of the inclined surface, and an opening/closing part of which one end is rotatably mounted on a downstream portion of the loading part in the discharge direction and is opened and closed to a closed position where the opening/closing part closes a downstream portion of the space in the discharge direction and an open position where the downstream portion is open and a part of the medium loaded on the loading part is loaded on the opening/closing part; and an angle of a loading surface of the opening/closing part at the open position with respect to a horizontal is set to an angle at which a movement of the medium to the downstream side in the discharge direction is limited such that a centroid of a longest medium loaded on the loading part and the loading surface is positioned upstream of a downstream end of the opening/closing part in the discharge direction, and an imaginary line extending to the upper end from an upstream end of the inclined surface of the support portion in the discharge direction is along the loading surface of the opening/closing part at the open position.