Hewlett-packard Development Company, L.p.

Ken Ko

Edward Anthony Hill

Wei Lit Teoh

Eugene Goh

Angel Astorgano-Ballesteros

Li-Wen Benedict Tan

The present subject matter describes determination of amount of print media present in an input tray of a printing system. In an example implementation of the present subject matter, a current operating torque of a motor that moves a pick arm for drawing print media from the input tray is monitored. The current operating torque is monitored while the pick arm is moved between a rest position and a pick-ready position. Based on the monitored operating torque, it is determined whether amount of print media present in the input tray is one of below and above a predefined amount of print media.

Print media amount determination

Disclosed are apparatuses and methods for holding a document sheet in place against a scanning surface of an image capture system. One such apparatus is a document cover comprising: a body that is oriented parallel to the scanning surface when the document cover is in the closed position; a compliant and elastic document backing that is partially attached to the body and configured to reflect light originating from the image capture system; and a backing constraint configured to secure a central region of the document backing to the body and further configured to constrain movement of the central region in a first direction that is normal to the scanning surface while allowing movement in the same direction of outer regions that are lateral to the central region. The document backing generates a downward spring force which biases the outer regions toward the platen.

Apparatus and method for retaining a document during imaging

An optical object detector including a feed path, a reference pattern facing the feed path, and an optical sensor configured to view the reference pattern through the feed path, absence of the reference pattern from the view of the optical sensor indicating presence of an object in the feed path.

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San Diego, CA, United States of America

Ken Ko