Apparatus and methods of detecting print media orientation

Details Apparatus and methods of detecting print media orientation Apparatus and methods of detecting print media orientation

2007-03-06

2007-03-06

Pope, Daryl C (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S691600, C340S505000, C340S539100, C340S010100, C400S630000, C400S234000

Reexamination Certificate

active

10897131

ABSTRACT:
A radio frequency signature (88) on a cut sheet of print media (28) is detected by a radio frequency interrogating device (94) to determine whether the print media (28) is properly oriented. The leading edge (124) or trailing edge (126) of the print media (28) is detected by one or more print media sensors (86, 90). A print controller (24) can note the time (t1) and cause the radio frequency interrogating device (94) to detect the radio frequency signature (88) at a time (t2) when the print media has reached a predetermined point along the print media pathway (110). The position of the radio frequency signature (88) on the print media (28) can be calculated using the time differential (t2−t1), the velocity profile of the print media and the known separation between the print media (28) and the radio frequency signature (88). By comparing the computer position with the expected position, the orientation of the print media (28) can be determined.

REFERENCES:
patent: 6246326 (2001-06-01), Wiklof et al.
patent: 6593853 (2003-07-01), Barrett et al.
patent: 6676240 (2004-01-01), Walker
patent: 6747560 (2004-06-01), Stevens, III
patent: 6750769 (2004-06-01), Smith
patent: 6938976 (2005-09-01), Siwinski et al.
patent: 7056048 (2006-06-01), Braun et al.

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