READING DEVICE CONFIGURED TO READ ORIGINAL DOCUMENT PLACED ON PLATEN

摘要

A reading device includes a platen; a cover; a reading unit; and a controller. The platen includes first and second reference points. The controller is configured to: control the reading unit to read one line worth of data in a main scanning direction when the cover is moved from an open position to a close position with an original document being placed on the platen, the one line including the first and second reference points; determine whether the first reference point is overlaid with the original document; in response to determining that the first reference point is overlaid with the original document, determine a first length of the original document in the main scanning direction based on the one line worth of data; specify a particular size of the original document such that the first length is a short side length of a prefixed sheet in the particular size.

主权项

1. A reading device comprising:
a platen including a first reference point, a second reference point, and a third reference point; a cover movable between an open position and a close position, the platen being exposed when the cover is at the open position, the platen being covered by the cover when the cover is at the close position; a reading unit configured to read an original document placed on the platen on a line-to-line basis in a main scanning direction while at least one of the reading unit and the platen is moving in a sub-scanning direction; and a controller configured to:
(a) control the reading unit to read one line worth of data in the main scanning direction when the cover is moved from the open position to the close position with the original document being placed on the platen, the one line including the first reference point and the second reference point;(b) determine whether or not the first reference point is overlaid with the original document;(c) in response to determining in (b) that the first reference point is overlaid with the original document, determine a first length of the original document in the main scanning direction based on the one line worth of data read by the reading unit;(d) specify a particular size of the original document such that the first length is a short side length of a prefixed sheet in the particular size; and(e) control the reading unit to read a range of the particular size of the original document.