Duplex scanning device
AssigneeSeiko Epson Corporation
InventorsKatsuyuki Endo, Hideki Furihata
Life of this patent
Estimating the term…
Abstract
A compact duplex scanner for scanning both sides of an original document scans a document smoothly without paper jams. A platen roller 8 is located opposite an image sensor 7 for scanning a paper 15 held therebetween as it is transported through a paper feed path 2b. The image sensor 7 and platen roller 8 are mounted on a rotary frame 90 designed to move circularly as a single unit around a rotary shaft positioned transversely to the paper feed path 2b. After the paper 15 is carried in a forward direction P and the front 15a of the paper 15 is scanned, the rotary frame 90 rotates 180 degrees, and the paper 15 is carried in a reverse direction to scan the back 15b.
Claims10
A scanning device for scanning both sides of a single-sheet original document, comprising:
- a transportation path through which the original document is transported;
- an image sensor that scans the original document transported through the transportation path;
- a platen roller positioned opposite the image sensor that holds the original document against the image sensor;
- a rotary mechanism that circularly moves the image sensor and platen roller as a single unit around a rotary shaft positioned transversely to the transportation path;
- and
- a motor that
- turns in one direction to drive the platen roller in a first direction and feed the original document through the transportation path in a forward direction, and
- turns in another direction to drive the rotary mechanism to move the image sensor and platen to a rotated position and thereafter drive the platen roller in the first direction and feed the original document through the transportation path in a reverse direction.
A scanning device for scanning both sides of a single-sheet original document, comprising:
- a transportation path through which the original document is transported;
- an image sensor that scans the original document transported through the transportation path;
- a platen roller positioned opposite the image sensor that holds the original document against the image sensor;
- a rotary mechanism that circularly moves the image sensor and platen roller as a single unit around a rotary shaft positioned transversely to the transportation path;
- a rotary frame that supports the image sensor and platen roller;
- and
- a stationary frame that supports the rotary frame such that the rotary frame can rotate around the rotary shaft;
- wherein the rotary mechanism reverses the transportation path inside the rotary frame relative to the transportation path inside the stationary frame by rotating the rotary frame;
- and
- stoppers for restricting circular movement of the rotary frame and fixing the rotary frame at a position for scanning the front of the original document and a position for scanning the back of the original document.
A scanning device for scanning both sides of a single-sheet original document, comprising:
- a transportation path through which the original document is transported;
- an image sensor that scans the original document transported through the transportation path;
- a platen roller positioned opposite the image sensor that holds the original document against the image sensor;
- a rotary mechanism that circularly moves the image sensor and platen roller as a single unit around a rotary shaft positioned transversely to the transportation path;
- a rotary frame that supports the image sensor and platen roller;
- and
- a stationary frame that supports the rotary frame such that the rotary frame can rotate around the rotary shaft;
- wherein the rotary mechanism reverses the transportation path inside the rotary frame relative to the transportation path inside the stationary frame by rotating the rotary frame;
- a first gear that rotates around the rotary shaft of the rotary frame;
- a second gear fixed to a rotary shaft of the platen roller;
- and
- a transfer gear for transferring power from the first gear to the second gear.
A scanning device for scanning both sides of a single-sheet original document, comprising:
- a transportation path through which the original document is transported;
- an image sensor that scans the original document transported through the transportation path;
- a platen roller positioned opposite the image sensor that holds the original document against the image sensor;
- a rotary mechanism that circularly moves the image sensor and platen roller as a single unit around a rotary shaft positioned transversely to the transportation path;
- a rotary frame that supports the image sensor and platen roller;
- and
- a stationary frame that supports the rotary frame such that the rotary frame can rotate around the rotary shaft;
- wherein the rotary mechanism reverses the transportation path inside the rotary frame relative to the transportation path inside the stationary frame by rotating the rotary frame;
- a paper feed roller positioned next to the transportation path inside the stationary frame;
- a motor for driving the paper feed roller;
- and
- a power transfer mechanism that operates the rotary mechanism using power from the motor.
Dependencies are inferred from the claim text.