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.

A motor controller includes a drive control portion. The drive control portion is configured to: execute feedback control of a drive current to be supplied to a drive motor, by using an inputted control signal indicating a target rotation speed for the drive motor and a detection signal of a rotation speed detection portion configured to detect a rotation speed of the drive motor; control the drive current in a first control period in which the target rotation speed is changed, such that the drive current is equal to or less than a predetermined first upper limit; and control the drive current in a second control period in which the target rotation speed is constant, such that the drive current is equal to or less than a predetermined second upper limit less than the first upper limit.

A medium feeding apparatus includes a media tray, a feed roller to sequentially feed a plurality of media placed on the media tray, a separation roller located facing the feed roller, and circuitry. The circuitry detects a leading end position of each of a plurality of media in a nip between the feed roller and the separation roller, determines a distance between a leading end position of a preceding medium, which is of the plurality of media in the nip, and a leading end position of a medium following the preceding medium, and sets a characteristic value of the separation roller based on the distance.

A medium feeding apparatus includes a media tray, a feed roller to sequentially feed a plurality of media placed on the media tray, a separation roller located facing the feed roller, and circuitry. The circuitry detects a leading end position of each of a plurality of media in a nip between the feed roller and the separation roller, determines a distance between a leading end position of a preceding medium, which is of the plurality of media in the nip, and a leading end position of a medium following the preceding medium, and sets a characteristic value of the separation roller based on the distance.

A feed device includes a feed roller, a transport roller pair provided further to the downstream side in the transport direction of a sheet than the feed roller, a first motor by which the feed roller is driven, and a second motor by which the transport roller pair is driven, and in which a controller that controls the first motor, and performs a skew removal operation accompanying reverse transport of the sheet by the transport roller pair causes a reverse current and a hold current as suppression currents that suppress the reverse transport amount of the feed roller to the reverse transport amount of the transport roller pair or less to flow to the first motor in at least a part of the skew removal operation.

A feed device includes a feed roller, a transport roller pair provided further to the downstream side in the transport direction of a sheet than the feed roller, a first motor by which the feed roller is driven, and a second motor by which the transport roller pair is driven, and in which a controller that controls the first motor, and performs a skew removal operation accompanying reverse transport of the sheet by the transport roller pair causes a reverse current and a hold current as suppression currents that suppress the reverse transport amount of the feed roller to the reverse transport amount of the transport roller pair or less to flow to the first motor in at least a part of the skew removal operation.

Provided are a medium conveying apparatus, a control method, and a control program is to enable further reduction in the time required for conveying the medium while suppressing the occurrence of the conveyance abnormality of the medium. A medium conveying apparatus includes a conveying mechanism to convey a medium, a determination module to determine whether a conveyance abnormality of the medium has occurred, and a control module to control the conveying mechanism so as to increase a conveyance speed of the medium to be conveyed thereafter, or reduce a conveyance interval of the medium to be conveyed thereafter if the conveyance abnormality of the medium has not occurred when a predetermined number of medium is conveyed.

A method for transporting an air-formed cellulose blank structure to a forming mould via a buffering module, includes the steps: continuously feeding the cellulose blank structure on a first endless belt unit in a first feeding direction, and redirecting the cellulose blank structure to a second endless belt unit; feeding the cellulose blank structure on the second endless belt unit in a second feeding direction being at least partly opposite the first feeding direction, where the second endless belt unit alternatingly is longitudinally moved in opposite directions relative to the first endless belt unit and a third endless belt unit, and redirecting the cellulose blank structure to the third endless belt unit; intermittently feeding the cellulose blank structure on the third endless belt unit in a third feeding direction at least partly coinciding with the first feeding direction.

A method for transporting an air-formed cellulose blank structure to a forming mould via a buffering module, includes the steps: continuously feeding the cellulose blank structure on a first endless belt unit in a first feeding direction, and redirecting the cellulose blank structure to a second endless belt unit; feeding the cellulose blank structure on the second endless belt unit in a second feeding direction being at least partly opposite the first feeding direction, where the second endless belt unit alternatingly is longitudinally moved in opposite directions relative to the first endless belt unit and a third endless belt unit, and redirecting the cellulose blank structure to the third endless belt unit; intermittently feeding the cellulose blank structure on the third endless belt unit in a third feeding direction at least partly coinciding with the first feeding direction.