An image reading apparatus includes a medium support section that supports a medium before feeding, a reading section that reads the medium that feeds from the medium support section, a transport roller that is disposed upstream of the reading section and transports the medium to the reading section, and a load applying device that applies a load against rotation of the transport roller. The transport roller is disposed on a rotating shaft that extends in a medium width direction that intersects the medium transport direction, and the load applying device imparts the load by pressing a transport roller driving gear that is disposed at one end of the rotating shaft in a direction from the one end of the rotating shaft to the other end thereof.

A sheet processing device in an embodiment includes a processing section, a tray, a lifting and lowering device, a flexible member, a first member, and a second member. The processing section processes a sheet. The sheet can be placed on a first surface on a first side of the tray. The lifting and lowering device moves the sheet to the processing section. The flexible member is provided on the first side of the tray and has flexibility. The first member is connected to a first end portion of the flexible member. The second member is connected to a second end portion opposite to the first end portion of the flexible member. The second member is separated from the first member in a first direction. A separation distance between the second member and the first member is shorter than length of the flexible member between the second member and the first member.

An image forming system has a transmission assembly, standard and auxiliary sheet feeders, standard and auxiliary trays, an image forming device and a controller. The transmission assembly is for switching transmission of a drive force of a motor selectively to the one of the standard and auxiliary sheet feeders. The controller determines whether sheet is absent in the standard tray. The controller, based on determining the sheet is absent in the standard tray and receipt of preceding data, control the transmission assembly to initiate to switch the transmission of the drive force to the auxiliary sheet feeder. Also the controller, based on receipt of control data received after preceding data, control the image forming device to form an image based on the control data.

There is provided an ink-jet printer including: a recording head; a motor; a conveying section; a switching mechanism switching transmittance of driving force of the motor; and a controller. The switching mechanism includes first and second gears. Under a condition that the controller determines that a set value of an execution parameter is a first value, the controller rotates the motor in clockwise and counterclockwise directions just for a first number of times in a process of moving the first gear from a second position to a first position; whereas under a condition that the controller determines that the set value of the execution parameter is a second value, the controller rotates the motor in the clockwise and counterclockwise directions just for a second number of times, smaller than the first number of times, in the process of moving the first gear from the second position to the first position.

The present disclosure is in one aspect to a dispenser for rolled sheet materials. The dispenser includes a feed roller that is rotatably mounted to a housing of the dispenser housing, and that is configured to feed a predetermined amount of sheet material from the supply of sheet material through a discharge provided along the housing of the dispenser. The dispenser also has a feed roller drive assembly with a drive motor, and a belt transmission assembly. The belt transmission assembly has a drive belt coupled to the drive motor and to the feed roller such that rotation of the feed roller is driven by operation of the drive motor.

A rotary arm restricts the rotation of a first sun gear or a second sun gear according to forward/reverse rotation drive of sheet discharge rollers. As a result, a rotating direction of a transmission gear coupled to the sheet discharge rollers is switched. If 1A denotes a pressure angle of gear teeth of a gear portion of the first sun gear and 2A denotes a pressure angle of gear teeth of a first planetary gear, a relationship of 2A+0.51A2A+1.5 is satisfied.

A rotary arm restricts the rotation of a first sun gear or a second sun gear according to forward/reverse rotation drive of sheet discharge rollers. As a result, a rotating direction of a transmission gear coupled to the sheet discharge rollers is switched. If 1A denotes a pressure angle of gear teeth of a gear portion of the first sun gear and 2A denotes a pressure angle of gear teeth of a first planetary gear, a relationship of 2A+0.51A2A+1.5 is satisfied.

An image forming apparatus includes a drive unit including a first drive train through which a driving force from the drive source is transmitted to the discharge roller and a second drive train through which a driving force from the drive source is transmitted to the reverse roller, and a switching mechanism, provided on the second drive train, configured to switch a rotating direction of the reverse roller between the forward rotating direction and the reverse rotating direction with the discharge roller rotating in one direction.

A sheet feeding device includes a driving transmission member, a feeding unit, and a switching member. The feeding unit is detachable from the sheet feeding device and includes a driven transmission member that receives a driving force from the driving transmission member, a feeding member, and a holding member that holds the driven transmission member and the feeding member. The switching member abuts the holding member and moves the feeding member between a second position and a first position lowered from the second position. When the driving force is transmitted to the driven transmission member, the feeding unit is positioned to the sheet feeding device by receiving a positioning force in an attachment direction of the feeding unit. When the driving force is not transmitted to the driven transmission member, the feeding unit is regulated by the switching member in movement in a direction opposite to the attachment direction.

A medium processing apparatus includes a receiving and dispensing port, a discriminating unit, a temporary storage, a reject cassette in which an abnormal medium temporarily stored in the temporary storage and a carried abnormal medium among media being withdrawn are collected and stored, a plurality of recycling cassettes configured to store media to be withdrawn, a first driving unit configured to drive a carrying path between an outlet of the discriminating unit and each of the receiving and dispensing port and the temporary storage, a second driving unit configured to drive a carrying path between an inlet of the discriminating unit and an inlet of the reject cassette and be a belt-roller type, and a third driving unit configured to drive a carrying path between the inlet of the reject cassette and each of inlets of the plurality of recycling cassettes and be a belt-guide type.