Loading patent…
AssigneeLexmark International, Inc.
InventorsCyrus Bradford Clarke, David Brian Langer, Randall David Mayo, Gregory John Sherwood
Estimating the term…
A laser printer (3) can initiate a line of printing only when the sweep of the laser light reaches a point in its cycle. An inkjet printer (5) moves paper by stepper motor in increments. Switch (9) senses the paper (15) to determine the location of paper in path (6) with respect to nominal printing locations of the laser printer. The closest nominal position is selected for printing. The paper may lead or lag the selected position. Switch (11) senses the paper to determine the location of paper in the path with respect to nominal printing locations of the inkjet printer. Two leads are added to reach a net greater lead, a lag is subtracted from a lead, and two lags are added to reach a net greater lag. The closest nominal position is then selected. This assures that registration does not vary by more than one half of the spacing between nominal locations of the second printer.
A printing system comprising a printer having a cycle of operation separating printing by a first distance, media sensing means at said printer to sense the location of said media with respect to at least two nominal locations for printing of said media by said printer, and data processing apparatus for controlling said printing system to initiate printing by said printer at the closest of said nominal locations for printing based on information from said media sensing means, said data processing apparatus also determining the difference between said sensed location of said media and said closest nominal location, and storing said difference.
A printing system comprising a first printer having a cycle of operation separating printing by a first distance, a second printer having a cycle of operation separating printing by a second distance, a paper feed path to move paper or other sheet media to said first printer for printing by said first printer and then to said second printer for printing by said second printer, first media sensing means at said first printer to sense the location of said media with respect to a nominal location for printing of said media by said first printer, second media sensing means at said second printer to sense the location of said media with respect to a nominal location for printing of said media at said second printer, and data processing apparatus controlling said printing systems to:
Dependencies are inferred from the claim text.