Medium conveying apparatus to correct skew of medium using second roller while moving first roller to be spaced apart from medium
AssigneePfu Limited
InventorShogo Yoshita
Life of this patent
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Abstract
A medium conveying apparatus includes a first roller to convey a medium, a movement mechanism to move the first roller between a first position in contact with the medium and a second position spaced apart from the medium, a second roller located on a downstream side of the first roller in a medium conveying direction to convey the medium, and a processor to detect a skew of the conveyed medium, and control the movement mechanism to move the first roller to the second position, and correct the skew of the medium using the second roller when the skew of the medium is detected.
Claims17
A medium conveying apparatus comprising:
- a first roller to convey a medium;
- a solenoid or a motor, to move the first roller between a first position in contact with the medium and a second position spaced apart from the medium;
- a second roller located on a downstream side of the first roller in a medium conveying direction to convey the medium;
- a medium sensor located in a central portion in a direction intersecting with the medium conveying direction;
- a plurality of second medium sensors located apart from each other in the direction intersecting with the medium conveying direction;
- and
- a processor to
- determine whether a skew of the conveyed medium has occurred based on output signals from the second medium sensors, and
- control the solenoid or the motor to move the first roller to the second position when it is determined that the skew of the conveyed medium has occurred,
- control the solenoid or the motor to return the first roller to the first position when the medium sensor detects passage of a front end of the conveyed medium after moving the first roller to the second position, and
- execute a correction of the skew of the conveyed medium, using the second roller.
A method for correcting a skew of a medium, comprising:
- conveying the medium, by a first roller;
- moving the first roller between a first position in contact with the medium and a second position spaced apart from the medium, by a solenoid or a motor;
- conveying the medium, by a second roller located on a downstream side of the first roller in a medium conveying direction;
- detecting the skew of the conveyed medium based on output signals from a plurality of second medium sensors located apart from each other in a direction intersecting with the medium conveying direction;
- controlling the solenoid or the motor to move the first roller to the second position when the skew of the conveyed medium is detected;
- controlling the solenoid or the motor to return the first roller to the first position when a medium sensor located in a central portion in the direction intersecting with the medium conveying direction detects passage of a front end of the conveyed medium after moving the first roller to the second position, and
- executing a correction of the skew of the conveyed medium, using the second roller.
A computer-readable, non-transitory medium storing a computer program, wherein the computer program causes a medium conveying apparatus including a first roller to convey a medium, a solenoid or a motor to move the first roller between a first position in contact with the medium and a second position spaced apart from the medium, a second roller located on a downstream side of the first roller in a medium conveying direction to convey the medium, a medium sensor located in a central portion in a direction intersecting with the medium conveying direction, and a plurality of second medium sensors located apart from each other in the direction intersecting with the medium conveying direction, to execute a process, the process comprising:
- detecting the skew of the conveyed medium based on output signals from the plurality of second medium sensors;
- controlling the solenoid or the motor to move the first roller to the second position when the skew of the conveyed medium is detected;
- controlling the solenoid or the motor to return the first roller to the first position when the medium sensor detects passage of a front end of the conveyed medium after moving the first roller to the second position;
- and
- executing a correction of the skew of the conveyed medium, using the second roller.
Dependencies are inferred from the claim text.