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HP LaserJet 4250 and 4350 Series Printers - Printing on Both Sides of Paper (Optional Duplexer)
The printer can automatically print on both sides of paper when an automatic duplexer is installed. This is called duplexing. The duplexer supports the following paper sizes: letter, legal, executive, A4, A5, and JIS B5.
The automatic duplexer is included with the HP LaserJet 4250dtn, 4250dtnsl, 4350dtn, and 4350dtnsl printers.
For models that do not include an automatic duplexer, you can print on both sides manually. You can also order the duplexer as an accessory.
The duplex slot cover that is located at the rear of the printer must be removed when the duplexer is installed. See the documentation that is included with the duplexer for installation instructions. When duplexing very complex pages, additional memory might be required.
When the printer prints by using the duplexer, the page partially protrudes into the top output bin, and then reverses to print on the second side.
Guidelines for printing on both sides of paper
Do not print on both sides of labels, transparencies, envelopes, vellum, custom sizes, or paper heavier than 28 lb (105 g/m2 ) because jams or damage to the printer might occur.
Note the following guidelines:
Orientation of paper for duplexing
Several kinds of paper (such as letterhead, preprinted paper, prepunched paper, and paper with watermarks) require a specific orientation for duplex printing. The duplexer prints the second side of paper first. The proper orientation of the paper in the trays is shown below.
For tray 1, load the front side facing down and the top edge toward you. For all other trays, load the front side facing up and the top edge toward the printer.
Layout options for printing on both sides of paper
The four duplex orientation options are shown below. These options can be selected in the printer driver (the preferred method) or at the printer control panel. (If you use the printer control panel, go to Configure Device menu, then the Printing submenu. Select DUPLEX BINDING. On the PCL submenu, select a setting for ORIENTATION.)
* When using Windows drivers, select Flip Pages Up to get the designated binding options.
To duplex with the optional duplex-printing accessory
The paper that you are printing on will partially come out of the top output bin during duplexing. Do not pull on the paper until duplexing is complete. During duplexing, the duplexer will not function if the rear output bin is open.
To duplex manually
If the printer does not have a duplexer installed, follow these instructions to manually print on both sides. Before attemping to duplex manually, ensure that the printer driver is set to enable manual duplexing. The procedure varies according to the operating system that you are using. For details, see the document Using the printer drivers . Look for the instructions in the column labeled "To change configuration settings."
These instructions are for Windows. To duplex manually with Mac OS 9, perform a custom software installation and load the plug-in for booklet or manual duplex printing. Manual duplexing is not supported for Mac OS X.
If the number of total sheets exceeds the tray 1 capacity for manual duplex jobs, you must repeat steps 6 and 7 each time paper is inserted until the duplexing job is complete.
Setting up the duplex option in the driver (2-sided printing option is "grayed out")
If the duplexer is installed but the duplex option does not appear or is "grayed out," it may need to be setup in the print driver.
Do the following:
The duplex option (print on 2 sides) should now be available under the driver Finishing tab.