There’s nothing wrong with that - and there’s no difference in workings between a duplex and non-duplex printer other than the first has a bit more hardware. As someone who takes stuff apart alot, duplex printers entertain me. Paper goes in the bottom, out the side, back in the side, out the top! I’m easily amused…
YMMV but ours does just fine UNLESS there is a lot of toner on the first side through. Then all that toner may melt a little and get sticky, causing jams.
I work at an office that generates a truly staggering amount of waste paper. So I salvage pages that have no proprietary or private or financial info on them, take them home, and we print our stuff on the backs. I have to weed out pages printed from websites with dark graphics because of the sticky factor. But plain text goes through no problem.
I think I must be unlucky then. I have a HP Laserjet 4L (somebody has to have one) and every time I’ve tried to print both sides the paper jams up the works. Apart from that it’s a brilliant printer. Maybe it’s the paper I use?
V
My Laserjet 4 had very frequent paper jams, too. Very annoying after years of satisfaction with LaserJet II’s. Almost led me to switch away from H-P LJ’s entirely. But I bought a used HP LaserJet 6, and am very happy with it.
Seems like the LJ4 line was just a lemon in the HP LaserJet series!
I constantly printed on the back side of paper, with both the HPII and now the HP6. I tried to do so with the HP4, but it often jammed.
Success on getting both sides printed without accordianing or jams often depends on the paper type and (believe it or not ) humidity. I have used Laserjet 2/3/4/5/6’s and now a few of the “00” series. The high temp fusing + rollers process that helps bond the toner to the page also tends to curl the paper in a certain way. If the printer mechanism paper handling tolerances are right and the paper is not too brittle or dry you can generally successfully run it in the opposite direction and print on both sides, but once run through it s is far more susceptible to jamming going through the other way esp if the humidity is low and the paper a lightweight stock.
One thing you shouldn’t do is use a mono laser printer to try to print on the back of a colour laser-printed sheet (not that you’re terribly likely to try this) - some colour toners have a lower melting point than the standard black stuff and colour-printed pages often have a lot more coverage - I unwittingly tried this once and the colour toner came off onto one of the rollers - everything I printed for the next 50 sheets or so had messy bits of colour toner on the back.