Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Reexamination Certificate
2005-07-05
2005-07-05
Ip, Paul (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
C318S467000, C358S451000, C358S497000, C235S454000
Reexamination Certificate
active
06914400
ABSTRACT:
A scanning operation is synchronized with the motion of a scan mechanism. Encoder signals indicative of a position of the scan mechanism relative to a scan platen or an object being scanned are received. These encoder signals may include a single channel phase signals are channel A and channel B phase signals. Transitions of the encoder signals are detected. Scan pulses for triggering a scan operation by a scan element are generated based on transitions of the encoder signals. Differences in the encoder signal resolution and a desired scan resolution are compensated for in the generation of the scan pulses. A transfer signal is generated in synchronization with the scan pulses for controlling output of data from the scan element. Variations of the velocity of the scan mechanism cause variations of the frequency at which the scan pulses are generated. Variations in the velocity of the scan mechanism are accounted for during this synchronization by varying the duration of the transfer state of the transfer signal in relation to the variations of the scan pulse frequency. The duration of the exposure state of transfer signal is kept constant, ensuring a constant exposure time for the scanning device.
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New High Torque 5 Phase Geared Step Motor with Compact Driver, Oriental Motor USA Corp, prior to May 1997.
Gibson Gretchen Yvonne
Herwald Marc Alan
Marra, III Michael Anthony
Yackzan Joseph Kamal
Aust, Esq. Ronald K.
Ip Paul
Lexmark International Inc.
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