Hewlett-packard Company

Hewlett-packard Development Company, L.p.

Joseph D Barbera

Kieran B Kelly

Pierre Joseph Kaiser

William J Jennings

Babak Honaryar

Aaron B Weast

An efficient sensing system. The efficient sensing system includes a first mechanism for sensing and a second mechanism for sensing. A third mechanism selectively polls the second mechanism upon receipt of a signal from the first mechanism. In a specific embodiment, the first mechanism includes an early warning sensor, and the second mechanism includes an accurate sensor. In the specific embodiment, the third mechanism includes a controller in communication with the accurate sensor and the early warning sensor. The controller samples the accurate sensor at the sampling rate in response to the signal.

Efficient sensing system

A multi-purpose, transmissive paper sensor includes a light beam projector and light detector having an analog output signal. Changes in the output signal from an open loop condition indicate the presences of at least one print medium being in the field-of-view of the sensor. Output signals indicative of print media leading edge, trailing edge, and number of sheets interrupting the light beam provide improved print media transport control for hard copy apparatus.

Method and apparatus for print media detection

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La Center, WA, United States of America

Joseph D Barbera