发明名称 |
Apparatus and methods of detecting print media orientation |
摘要 |
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 (t<SUB>1</SUB>) and cause the radio frequency interrogating device ( 94 ) to detect the radio frequency signature ( 88 ) at a time (t<SUB>2</SUB>) 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 (t<SUB>2</SUB>-t<SUB>1</SUB>), 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.
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申请公布号 |
US2006017568(A1) |
申请公布日期 |
2006.01.26 |
申请号 |
US20040897131 |
申请日期 |
2004.07.22 |
申请人 |
BURDETTE CHRIS A;HARDIN KEITH B;UNDERWOOD MARK S;WELLS TERRY L |
发明人 |
BURDETTE CHRIS A.;HARDIN KEITH B.;UNDERWOOD MARK S.;WELLS TERRY L. |
分类号 |
G08B13/14;G06F17/00;G08B21/00 |
主分类号 |
G08B13/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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