Apparatus and methods of detecting relative position of RF signature on print media
First Claim
1. A radio frequency signature position detecting apparatus comprising:
- a printer assembly with a print media pathway through which print media is fed;
a radio frequency interrogating device that is angled with respect to the direction of travel of said print media;
a print media sensor;
a print controller that calculates the time differences between when said print media sensor detects a cut sheet of print media as having reached a designated point along said print media pathway and when said radio frequency interrogating device detects a radio frequency signature embedded in said print media;
said print controller using the time differences and the known angle between the radio frequency interrogating device and the print media sensor to calculate the relative left/right position of said radio frequency signature.
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Accused Products
Abstract
The presence of a radio frequency signature (88) on a cut sheet of print media (28) is detected by a radio frequency interrogating device (94) to determine it'"'"'s relative left/right position on the print media (28). Either 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) when print media is detected 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) and the known angular displacement of the radio frequency interrogating device (94).
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Citations
20 Claims
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1. A radio frequency signature position detecting apparatus comprising:
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a printer assembly with a print media pathway through which print media is fed; a radio frequency interrogating device that is angled with respect to the direction of travel of said print media; a print media sensor; a print controller that calculates the time differences between when said print media sensor detects a cut sheet of print media as having reached a designated point along said print media pathway and when said radio frequency interrogating device detects a radio frequency signature embedded in said print media; said print controller using the time differences and the known angle between the radio frequency interrogating device and the print media sensor to calculate the relative left/right position of said radio frequency signature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of detecting the position of a radio frequency signature on print media comprising using a radio frequency interrogating device to determine the relative position of a radio frequency signature traversing on a cut sheet of print media as the print media is fed through a printer'"'"'s print media pathway;
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providing a print controller and calculating the time differences between when a print media sensor detects a cut sheet of print media as having reached a designated point along said print media pathway and when a radio frequency interrogating device detects the presence of two or more radio frequency signatures embedded in the print media; and the print controller using the time differences and the known angle between the radio frequency interrogating device and the print media sensor to calculate the relative left/right positions of each radio frequency signature embedded in the print media. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification