Hewlett-packard Development Company, L.p.

Vern Elliot Myers

Wesley R Schalk

Kevin Lo

Matt G Driggers

Raymond C Sherman

Lynn A Collie

Paul Allan Osborne

John Connell

An example apparatus may include a supply guide to receive a plurality of print supplies and a lock mechanism to retain the plurality of print supplies and release a print supply of the plurality of print supplies responsive to a determination that an amount of print substance in the print supply is at or below a threshold level.

Print supply locks

A sensor positioning system including a moveable sensor holder having a following surface, the sensor holder configured to hold an optical sensor at a selected distance from the following surface, a biasing system configured to bias the following surface against a surface of a sheet of print medium, and a drive system configured to move the sensor holder across the sheet of print medium with the following surface biased against and sliding on the surface of the sheet of print medium to maintain the optical sensor at substantially the selected distance from the surface of the sheet of print medium.

Sensor positioning system

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Vancouver, WA, United States of America

Vern Elliot Myers