Registers – Coded record sensors – Particular sensor structure
Reexamination Certificate
2005-02-24
2008-08-26
Frech, Karl D. (Department: 2887)
Registers
Coded record sensors
Particular sensor structure
C235S462200, C235S462220
Reexamination Certificate
active
07416127
ABSTRACT:
A range-finding system for a portable image reader is described. The range-finding system uses a distance-measuring device, such as an ultrasonic transducer, to determine the distance between the reader and a target, such as a label containing a bar code. An operator receives a visual indication which will assist in positioning the image reader within the optimal reading range of the target. The visual indicator may include three LED's of different color or with different blinking rates which will indicate to the operator that the reader is short, long or in the optimal reading range of the reader. In one embodiment, the reader would automatically cycle through an image acquisition or decode sequence when range finder detects that the target is within the optimal reading range of the reader. In another embodiment, the visual indicator will prompt the operator to manually trigger the image acquisition or decode sequence once the reader is positioned within the optimal reading range.
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Frech Karl D.
Pearne & Gordon LLP
Psion Teklogix Systems Inc.
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