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US 2018/0027137 A1Published application
Automatic document feeder
AssigneeHewlett-Packard Development Company, L.P.
InventorsSean BS Lim, Lim Cheng Woon, Praveen Francis
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Abstract
An automatic document feeding system includes an image reader including an optical window and a light source illuminating the optical window, and an automatic document feeder including a reflective flag positioned within a viewing region of the optical window.
Claims15
An automatic document feeding system, comprising:
- an image reader including an optical window and a light source illuminating the optical window;
- and
- an automatic document feeder including a reflective flag positioned within a viewing region of the optical window.
A method of automatic document feeding, comprising:
- reflecting a light source with a reflective surface of a flag in an optical window of a document feeding device in a first state;
- initiating movement of a medium through the document feeding device;
- contacting the medium against a trigger of the flag;
- rotating the reflective surface of the flag out of the optical window in response to movement of the medium past the trigger;
- changing light reflectance in the optical window to a second state;
- detecting a leading edge of the medium in response to the change of state prior to the medium passing into the optical window;
- and
- continuing movement of the medium through the document feeding device.
5 more elements
A scanning device, comprising:
- an automatic document feeder to move a medium through the scanning device, the automatic document feeder includes a reflective flag, the reflective flag includes a trigger and a reflective surface radial spaced from the trigger;
- and
- a scanning assembly including an image reader having a scan window,
- wherein the reflective flag is oriented toward the scan window in a first position and away from the window in a second position.
1 more element
Dependencies are inferred from the claim text.