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US 9,539,827 B2Granted
Transportation apparatus and recording apparatus
AssigneeSeiko Epson Corporation
InventorsTsuneyuki Sasaki, Junya Kato
Life of this patent
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Abstract
A transportation apparatus includes a first velocity sensor that detects a first measure of the transportation velocity of a medium that is transported, and a second velocity sensor that detects a second measure of the transportation velocity of the medium. The first and second velocity sensors are positioned offset from each other in an intersecting direction that intercepts a transportation direction of the medium. A skew detection section calculates a velocity difference from the first and second measures of the transportation velocities, and determines a skew state of the medium on the basis of the velocity difference.
Claims12
A transportation apparatus, comprising:
- a first velocity sensor located at a first position to detect a first transportation velocity of a medium as it is transported in a transportation direction;
- a second velocity sensor to detect a second transportation velocity of the medium as it is transported in the transportation direction, said second velocity sensor being located at a second position offset from the first position in a spanning direction intersecting the transportation direction;
- a skew detection section that calculates a velocity difference between the first transportation velocity and the second transportation velocity, and detects a skew state of the medium on the basis of the velocity difference;
- a skew correction execution section that executes skew correction for the medium on the basis of the skew state detected by the skew detection section;
- and
- a transportation section that transports the medium intermittently;
- wherein the skew correction execution section executes the skew correction on the basis of a tendency of a change in the velocity difference when the medium is transported by the transportation section.
4 more elements
A transportation apparatus, comprising:
- a first velocity sensor located at a first position to detect a first transportation velocity of a medium as it is transported in a transportation direction;
- a second velocity sensor to detect a second transportation velocity of the medium as it is transported in the transportation direction, said second velocity sensor being located at a second position offset from the first position in a spanning direction intersecting the transportation direction;
- a skew detection section that calculates a velocity difference between the first transportation velocity and the second transportation velocity, and detects a skew state of the medium on the basis of the velocity difference;
- and
- a transportation section that transports the medium intermittently;
- wherein:
- the skew detection section calculates a new one of said velocity difference each time the transportation section transports the medium;
- the skew detection section compares each new one of said velocity difference with a second threshold;
- and
- wherein error information is issued in response to a magnitude of a new one of said velocity difference exceeding a magnitude of the second threshold.
7 more elements
A transportation apparatus, comprising:
- a first velocity sensor located at a first position to detect a first transportation velocity of a medium as it is transported in a transportation direction;
- a second velocity sensor to detect a second transportation velocity of the medium as it is transported in the transportation direction, said second velocity sensor being located at a second position offset from the first position in a spanning direction intersecting the transportation direction;
- a skew detection section that calculates a velocity difference between the first transportation velocity and the second transportation velocity, and detects a skew state of the medium on the basis of the velocity difference;
- a skew correction execution section that executes skew correction for the medium on the basis of the skew state detected by the skew detection section;
- and
- a transportation section that transports the medium in a non-intermittent manner;
- wherein the skew correction execution section executes the skew correction on the basis of a tendency of a change in the velocity difference when the medium is transported non-intermittently by the transportation section.
4 more elements
A transportation apparatus, comprising:
- a first velocity sensor located at a first position to detect a first transportation velocity of a medium as it is transported in a transportation direction;
- a second velocity sensor to detect a second transportation velocity of the medium as it is transported in the transportation direction, said second velocity sensor being located at a second position offset from the first position in a spanning direction intersecting the transportation direction;
- a skew detection section that calculates a velocity difference between the first transportation velocity and the second transportation velocity, and detects a skew state of the medium on the basis of the velocity difference;
- and
- a transportation section that transports the medium non-intermittently;
- wherein the velocity difference is compared with a fourth threshold when the medium is transported non-intermittently by the transportation section;
- and
- wherein error information is issued in response to the velocity difference being in excess of the fourth threshold.
5 more elements
Dependencies are inferred from the claim text.