Check the rapid release guide, it may be broken.
If the printer is crimping paper consistently, and there isn't anything disturbing the paper path (and it's a high page count unit, or one that has been moved around a lot), check the transfix assembly. Sometimes, it needs to be adjusted; but there are limits to HOW it can be adjusted -- sometimes it has to be replaced, at which point you'll probably want to buy a new printer, unless you feel you can do that time consuming repair on your own.
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