Image forming machine with transfer roller
Variable-timing automatic document feeding device and method
Multifunctional machine performing a shuttle-scanning Patent #: 6139206
ApplicationNo. 10809528 filed on 03/26/2004
US Classes:399/395, Skew correction399/82, Job mode399/85, Having mode change399/388, Feeding to transfer position399/394, In registration with image399/401, Re-fed for additional image271/3.08, Feeding from top of stack271/226, With means to align sheet271/264, By means to convey sheet (e.g., from pack to operation)399/370, Having size detection400/323Carriage-feed in two directions (e.g., continuous typing in both directions)
ExaminersPrimary: Hirshfeld, Andrew H.
Assistant: Crenshaw, Marvin P.
Attorney, Agent or Firm
Foreign Patent References
AbstractIn a laser printer capable of printing on both sides of a sheet, alignment or skew of the sheet is corrected with register rollers before printing is performed first on a side of the sheet. The sheet with an image having been formed by a process unit is fed to a re-circulation path for printing on the other side of the sheet. The sheet alignment or skew is corrected in the re-circulation path by a guide plate while the sheet is fed by re-circulation feed rollers. The sheet fed back to the register rollers is fed toward the process unit without being temporarily stopped at the register rollers before printing on the other side of the sheet.