Mark detecting device, adjustment method, and printing apparatus
AssigneeRicoh Company, Ltd.
InventorMitsunobu Gouda
Life of this patent
Estimating the term…
Abstract
A mark detecting device detects a positioning mark on a transfer medium based on light that is emitted to and then reflected from the transfer medium. The mark detecting device includes a light emitting unit that emits light to a target position on the transfer medium; a light receiving unit that receives light reflected from the target position; and an adjusting unit that rotatably supports a detecting unit including at least one of the light emitting unit and the light receiving unit about a center of rotation, which passes through the target position, on the transfer medium and adjusts the rotation angle of the detecting unit with respect to the center of rotation.
Claims10
A mark detecting device that detects a positioning mark on a transfer medium based on light that is emitted to and then reflected from the transfer medium, the mark detecting device comprising:
- a light emitting unit that emits light to a target position on the transfer medium;
- a light receiving unit that receives light reflected from the target position;
- and
- an adjusting unit that rotatably supports a detecting unit including at least one of the light emitting unit and the light receiving unit about a center of rotation, which passes through the target position, on the transfer medium and adjusts the rotation angle of the detecting unit with respect to the center of rotation, wherein the adjusting unit includes:
- a rotating arm having one end that is rotated about the center of rotation;
- and
- a supporting portion that is supported by a free end of the rotating arm and supports the detecting unit.
An adjustment method performed in a mark detecting device that detects a positioning mark on a transfer medium based on light that is emitted to and then reflected from the transfer medium, the adjustment method comprising:
- rotatably supporting a detecting unit on an adjusting unit that includes a rotating arm having one end that is rotated about a center of rotation and a supporting portion that is supported by a free end of the rotating arm and supports the detecting unit, the detecting unit including at least one of a light emitting unit that emits light to a target position on the transfer medium and a light receiving unit that receives light reflected from the target position about the center of rotation, which passes through the target position, on the transfer medium and adjusting the rotation angle of the detecting unit with respect to the center of rotation.
A printing apparatus comprising:
- a mark detecting device that detects a positioning mark on a transfer medium based on light that is emitted to and then reflected from the transfer medium;
- an image forming unit that forms an image on the transfer medium;
- a transport unit that transports the transfer medium to the image forming unit;
- and
- a transport control unit that changes transport speed of the transfer medium to the image forming unit by the transport unit on the basis of the positioning mark,
- wherein the marking detecting device includes
- a light emitting unit that emits light to a target position on the transfer medium;
- a light receiving unit that receives light reflected from the target position;
- and
- an adjusting unit that rotatably supports a detecting unit including at least one of the light emitting unit and the light receiving unit about a center of rotation, which passes through the target position, on the transfer medium and adjusts the rotation angle of the detecting unit with respect to the center of rotation, wherein the adjusting unit includes:
- a rotating arm having one end that is rotated about the center of rotation;
- and
- a supporting portion that is supported by a free end of the rotating arm and supports the detecting unit.
Dependencies are inferred from the claim text.