HP5L duplex

Archived from groups: comp.periphs.printers (More info?)

Not unless you want to replace the Lower pressure roller on the fuser.
Toner on the Printed page ( you have to do the "Duplexing" part
manually, printing the even numbered pages on one side then flipping
all the paper around and printing the odd numbered ones)... starts to
come off onto the lower "Rubber like" roller on the fuser on these and
the 6L ,5P/6P and 1100... etc.. after a while these start grabbing
the paper and eventually you will start getting paper jams on a
regular basis.A fairly expensive repair compared to the cost of the
printer in my mind.
This is why only the larger printers ( usually with hard metal
rollers in the fusers) are typically the only printers with a
Duplexer. There are a few small ones ( the HP 2200D comes to mind
immediately)that come with duplexing capability, but not many.

hope this helps a little.