Lexmark International, Inc.

Terry Lee Wells

Keith Bryan Hardin

Mark Stephen Underwood

Chris Anthony Burdette

The presence of a radio frequency signature () on a cut sheet of print media () is detected by a radio frequency interrogating device () to determine it's relative left/right position on the print media (). Either the leading edge () or trailing edge () of the print media () is detected by one or more print media sensors (). A print controller () can note the time (t) when print media is detected and cause the radio frequency interrogating device () to detect the radio frequency signature () at a time (t) when the print media has reached a predetermined point along the print media pathway (). The position of the radio frequency signature () on the print media () can be calculated using the time differential (t-t) and the known angular displacement of the radio frequency interrogating device ().

Apparatus and methods of detecting relative position of RF signature on print media

A radio frequency signature () on a cut sheet of print media () is detected by a radio frequency interrogating device () to determine whether the print media () is properly oriented. The leading edge () or trailing edge () of the print media () is detected by one or more print media sensors (). A print controller () can note the time (t) and cause the radio frequency interrogating device () to detect the radio frequency signature () at a time (t) when the print media has reached a predetermined point along the print media pathway (). The position of the radio frequency signature () on the print media () can be calculated using the time differential (t&#x2212;t), the velocity profile of the print media and the known separation between the print media () and the radio frequency signature (). By comparing the computer position with the expected position, the orientation of the print media () can be determined.

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Lexington, KY, United States of America

Terry Lee Wells