Facsimile and static presentation processing – Facsimile – Picture signal generator
Reexamination Certificate
2006-05-02
2006-05-02
Wallerson, Mark (Department: 2626)
Facsimile and static presentation processing
Facsimile
Picture signal generator
C358S498000, C358S497000, C358S496000, C271S186000, C271S114000, C399S367000, C399S405000, C399S098000
Reexamination Certificate
active
07038819
ABSTRACT:
The present invention relates to a depth of field adjustment device and method for an automatic document feeder. The automatic document feeder has a guiding groove for placing an object to be scanned. The guiding groove has a scanning window for providing image picking-up for an optical chassis. An adjustable suppressing mechanism located at the guiding groove in corresponding to the scanning window may drive the object to be scanned to pass through an optimal depth of field height of the scanning window. First, at least a part of the pre-scanned object is fed in to be located between the adjustable suppressing mechanism and the scanning window. The depth of field height is then adjusted and changed by the adjustable suppressing mechanism. And, the image of the pre-scanned object is compared with a pre-stored image. After the pre-scanned objected has been judged to be located at the optimal depth of field height, the adjustable suppressing mechanism is fixed and the pre-scanned object is sent out. Then, it may achieve a most clear image picking-up for scanning the object to be scanned.
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Chiang Shu-Ya
Fang Po-Hua
Berkeley Law & Technology Group LLC
Wallerson Mark
Worku Negussie
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