Papr Jam, Samsung CLP310 - paper jams half way through the job

If it jams every page, it is the infamous Samsung design flaw. There are dozens of reports of this problem all over the internet. The best solution: sell it or otherwise get rid of it ASAP and buy another type or model of printer. The 2nd best solution: call trained technician and ask to replace the broken part. It could be thermistor near fuser, some people say it is a photo-interrupter.

Whats happening is the feeder is slipping and not pulling the paper through the printer.. take the paper-tray out completely then use some "nail polish remover" on a cloth and apply it on the rubber band that you will see at the bottom/back. Just make sure that you unplug the printer before you do that just for safety precautions.
The rubber will become tacky again and so happy printing.. if this happens again in a few months do the same. Mine has bee working for the last six months now.

Good luck!!

This is a common problem but fix the printer, don't sell it! This is likely the exit sensor. Go see this video on YouTube: 5fJHykzkfww

Then go to eBay and get the part for about $10. It's a simple 15 minute fix and the video shows how to do it.

Pull the paper safely.