Sheet-Fed Duplex and Sheet-Fed Duplex Multi-Color Printers
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United States of America Patent
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Issued Date -
May 24, 2012
app pub date -
Sep 22, 2011
filing date -
Sep 22, 2010
priority date (Note) -
Abandoned
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Abstract
A sheet-fed duplex printer comprises a pair of impression cylinders 6a, 6b and first and second electrophotographic printing units 7a and 7b. Each of the cylinders is provided on a peripheral surface thereof with a paper gripper for gripping a sheet of paper. The cylinders and printing units are so disposed relative to each other and suitably operated for printing on one face of the sheet of paper as it is conveyed following the peripheral surface of one cylinder, and for printing on the other face of the sheet of paper as it is conveyed following the peripheral surface of the other cylinder. This arrangement allows high precision and high speed printing of a sheet of paper large in size without increasing the entire apparatus length.
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