According to examples, an apparatus may include a guide frame, a standard position pawl movably attached to the guide frame, the standard position pawl to engage a standard pawl detent. The apparatus may also include a custom position pawl movably engaged with the guide frame, the custom position pawl to engage custom pawl teeth of a rack. The apparatus may further include a switch in movable engagement with the guide frame, the switch being movable between a first position at which the custom position pawl is maintained at a disengaged position with respect to the custom pawl teeth of the rack and a second position at which the custom position pawl is free to move between the disengaged position and an engaged position with respect to the custom pawl teeth of the rack.

According to examples, an apparatus may include a guide frame, a standard position pawl movably attached to the guide frame, the standard position pawl to engage a standard pawl detent. The apparatus may also include a custom position pawl movably engaged with the guide frame, the custom position pawl to engage custom pawl teeth of a rack. The apparatus may further include a switch in movable engagement with the guide frame, the switch being movable between a first position at which the custom position pawl is maintained at a disengaged position with respect to the custom pawl teeth of the rack and a second position at which the custom position pawl is free to move between the disengaged position and an engaged position with respect to the custom pawl teeth of the rack.

A medium-suction apparatus includes a conveyer to convey a medium in a conveyance direction, a first suction unit to perform suction operation on the medium to attract the medium to the conveyer, and a second suction unit to perform the suction operation on the medium to attract the medium to the conveyer. The second suction unit being disposed next to the first suction unit in a width direction perpendicular to the conveyance direction. The second suction unit starts the suction operation after the first suction unit stalls the suction operation.

A medium-suction apparatus includes a conveyer to convey a medium in a conveyance direction, a first suction unit to perform suction operation on the medium to attract the medium to the conveyer, and a second suction unit to perform the suction operation on the medium to attract the medium to the conveyer. The second suction unit being disposed next to the first suction unit in a width direction perpendicular to the conveyance direction. The second suction unit starts the suction operation after the first suction unit stalls the suction operation.

Disclosed is an image forming apparatus which includes: a feeding portion configured to feed a sheet; an image forming portion configured to form an image on the sheet; a conveying portion configured to stop the sheet fed by the feeding portion at a predetermined position and to convey the sheet to the image forming portion in accordance with a timing of forming the image by the image forming portion; a type discriminating portion configured to discriminate whether a type of the sheet to be fed belongs to a first sheet type group including plain paper or to a second sheet type group including coated paper; and a controlling portion configured to control feeding of the sheet, wherein the controlling portion is configured to change a sheet feeding start timing of the feeding portion in accordance with the type discriminated by the type discriminating portion.

Disclosed is an image forming apparatus which includes: a feeding portion configured to feed a sheet; an image forming portion configured to form an image on the sheet; a conveying portion configured to stop the sheet fed by the feeding portion at a predetermined position and to convey the sheet to the image forming portion in accordance with a timing of forming the image by the image forming portion; a type discriminating portion configured to discriminate whether a type of the sheet to be fed belongs to a first sheet type group including plain paper or to a second sheet type group including coated paper; and a controlling portion configured to control feeding of the sheet, wherein the controlling portion is configured to change a sheet feeding start timing of the feeding portion in accordance with the type discriminated by the type discriminating portion.

A sheet supporting apparatus includes a body, a supporting portion configured to be held in an elevating manner by the body and to support a sheet, a sheet regulation portion regulating a position of the sheet supported on the supporting portion, a movement portion capable of moving between a first position where the sheet regulation portion regulates the position of the sheet supported on the supporting portion, and a second position where the supporting portion is regulated from elevating with respect to the body, and a movement regulation unit regulating the movement portion from moving to the second position.

A sheet supporting apparatus includes a body, a supporting portion configured to be held in an elevating manner by the body and to support a sheet, a sheet regulation portion regulating a position of the sheet supported on the supporting portion, a movement portion capable of moving between a first position where the sheet regulation portion regulates the position of the sheet supported on the supporting portion, and a second position where the supporting portion is regulated from elevating with respect to the body, and a movement regulation unit regulating the movement portion from moving to the second position.

According to one embodiment, a sheet conveying device includes a tray and a correcting member. On the tray, a sheet bundle in which a plurality of sheets are overlapped is stacked in a thickness direction of the sheet bundle. The correcting member moves relative to the tray in the thickness direction. The correcting member abuts against an upper layer portion of an outer peripheral portion of the sheet bundle on the tray, and presses the upper layer portion from an outside after abutting. The correcting member corrects a position of the upper layer portion in a lateral direction intersecting the thickness direction toward an inside from the outside of the sheet bundle.

A sheet suction device includes a bearing member configured to bear a sheet on a circumferential surface of the bearing member and rotate in a first direction, a plurality of suction holes in a bearing region in the circumferential surface of the bearing member, a suction device connected to the plurality of suction holes, the suction device configured to suck the sheet through the plurality of suction holes, and a first member between the plurality of suction holes and the suction device, the first member rotatable in a second direction different from the first direction to change a suction region of the suction device connected to the plurality of suction holes. A rotation of the first member in the second direction expands the suction region of the suction device in the bearing region of the bearing member.