A medium transport apparatus includes: a first and second route members that constitute a medium transport route; a transport roller pair that nips and feeds a medium being transported between the first and second route members and includes a first and second rollers that nip the medium therebetween; and a gate switchable between a first and second states. In the first state, the gate closes the medium transport route at a location upstream, in a medium transport direction, of a nip location at which the transport roller pair nips the medium. In the second state, the gate opens the medium transport route. The gate is disposed on a rotating member rotatable around a first rotating shaft, which is a rotating shaft for the first roller. The first rotating shaft engages with a fixed member, which is fixed to both the first route member and the second route member.

A sheet conveying device includes a sheet container, a separation feeder, a plurality of conveyance drivers, a multifeed detector, a sheet detector, and a conveyance controller. The conveyance drivers are driven to convey a sheet to a conveyance completion position on a sheet conveyance path. The multifeed detector detects occurrence of a multifeed on the conveyance path. The sheet detector detects presence or absence of the sheet at a sheet detection point on the conveyance path. The conveyance controller controls the conveyance drivers to be continuously driven until a preceding sheet preceding multifed sheets is conveyed to the conveyance completion position after the multifeed detector detects the occurrence of the multifeed. The conveyance controller controls the conveyance drivers to stop in a period in which at least one of the multifed sheets is present at the sheet detection point after the preceding sheet is conveyed to the conveyance completion position.

In accordance with an embodiment, a post-processing apparatus comprises a memory that stores a threshold value and a first accumulated data of a physical quantity of one of a motor or a driven member driven by the motor; and a controller that acquires a predetermined data associated with a physical quantity of one of the driving motor or the driven member driven by the motor, acquires a second accumulated data by adding the predetermined data to the first accumulated data read from the memory, compares the second accumulated data with the threshold value, and transmits a request for increasing a discharge interval of the sheet if the second accumulated data is greater than the threshold value.

A system for dispensing hot melt adhesives, comprising an adhesive dispenser including a fluid passage leading to an outlet. The system further comprises a supply conduit fluidly connected to the fluid passage and a feeding mechanism configured to feed an elongate, flexible element of solid adhesive into the supply conduit. The system further comprises a first heating element positioned along at least a portion of the supply conduit to melt a portion of the elongate, flexible element being fed into the supply conduit and thereby form a supply of liquid adhesive within the supply conduit.

A sheet stacking apparatus includes a discharging portion including a nip portion nipping and conveying a sheet, a stacking portion on which the sheet discharged by the discharging portion is stacked, an air blowing unit configured to blow air toward a lower face of the sheet being discharged by the discharging portion, and an air volume control portion configured to control the air blowing unit such that a volume of the air blown by the air blowing unit is switched from a first air volume to a second air volume which is smaller than the first air volume while the nip portion of the discharging portion is nipping and conveying the sheet to set the volume of the air to the second air volume in a case where a trailing end of the sheet discharged by the discharging portion passes through the nip portion.

In accordance with an embodiment, a sheet processing apparatus, containing a controller that acquires a predetermined data associated with a physical quantity of one of a driving motor or a driven member driven by the motor based on a predetermined signal, compare the predetermined data with a threshold value, and determine whether to transmit a request for increasing a discharge interval of a sheet based on the comparative result.

In accordance with an embodiment, a post-processing apparatus comprises a memory that stores a threshold value and a first accumulated data of a physical quantity of one of a motor or a driven member driven by the motor; and a controller that acquires a predetermined data associated with a physical quantity of one of the driving motor or the driven member driven by the motor, acquires a second accumulated data by adding the predetermined data to the first accumulated data read from the memory, compares the second accumulated data with the threshold value, and transmits a request for increasing a discharge interval of the sheet if the second accumulated data is greater than the threshold value.

A sheet is cut between a first conveying unit and a second conveying unit in a state in which the first and second conveying units halt and in which an upstream conveying unit conveys the sheet at a first speed; after the sheet is cut, the first conveying unit conveys the sheet at a second speed higher than the first speed to reduce a slack formed during the halting; after the sheet is cut, the second conveying unit conveys the downstream-side sheet at a third speed higher than the first speed; if the third conveying unit is nipping the sheet during cutting, the third conveying unit conveys the sheet at the third speed; and if the third conveying unit is not nipping the sheet, the third conveying unit conveys the sheet at the third speed or a fourth speed after the detecting unit detects the sheet.

A sheet is cut between a first conveying unit and a second conveying unit in a state in which the first and second conveying units halt and in which an upstream conveying unit conveys the sheet at a first speed; after the sheet is cut, the first conveying unit conveys the sheet at a second speed higher than the first speed to reduce a slack formed during the halting; after the sheet is cut, the second conveying unit conveys the downstream-side sheet at a third speed higher than the first speed; if the third conveying unit is nipping the sheet during cutting, the third conveying unit conveys the sheet at the third speed; and if the third conveying unit is not nipping the sheet, the third conveying unit conveys the sheet at the third speed or a fourth speed after the detecting unit detects the sheet.

A transport roller pair including: a first-side roller provided with a plurality of roller portions spaced apart in a rotation axial line direction; a fixing device; and an image forming device is provided. The first-side roller includes roller portions. The transport roller pair further includes a second-side roller including a plurality of contact areas and a plurality of non-contact areas as areas other than the plurality of contact areas. At least the contact areas are covered with a release layer, and an outer diameter of each of the plurality of non-contact areas is smaller than an outer diameter of each of the plurality of contact areas. The second-side roller includes a shaft member integrally formed to have a stepped shape.