laserjet 4350 corner of paper getting folded down but doesn't jam printer

Has anyone seen a hp 4350 where it is folding the corner of the paper down.  It will only do this 4-5 times out of 250 sheets.  We have already replaced the maintenance kit as it was due to be replaced anyways.  

It will print any text on the fold and does not cause the printer to jam.  

We have tried 3 different manufactures of paper although all the same weight.  
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centrepcAsked:
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printerguyConnect With a Mentor Commented:
Morning..

OK, now that I know which tray... here's your miracle cure for the problem.

Turn off the printer. Take out the toner cartridge and paper tray. Turn the printer over and put it on it's 'top'. Look inside the 'slot' where the paper is feeding from the tray. You will see a metal 'paper guide'. If you look carefully, you'll notice the guide is slightly bent. Without removing it from the machine, bent it, so it looks straight. I saw this exact problem a couple of months ago.  :)
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joedCommented:
Is the print inside the fold  or on top of the fold? That will indicate if it is happening before or after the toner  cartridge.
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centrepcAuthor Commented:
It will print text fine on top of the fold.  
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joedCommented:
The problem is before the toner cartridge.
Check the feed tray and all the paper path before the toner. It could be a lost piece of paer stuck inther someplace. Manually slide a sheet of paper though the paper path.
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printerguyCommented:
Have you been able to isolate which tray(s) are being used?
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David523Commented:
Does this happen with all the different brands of paper?

Might monitor and try a NEW pack of paper when it happens to determine if that helps.

I have seen paper from various manufacturers, same advertised weight yet the feel and way the printer operates is not the same.  ie Same specifications yet some works fine and others have intermittent jams, intermittent folding of corners, etc....

Hope this Helps!!!
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centrepcAuthor Commented:
The tray being used is the 500 sheet tray.  The print jobs are to big to run from the mp tray.  We have pulled another tray from another unit working fine and it still does the same thing.  

So this is what we know
It can't be the tray,  the same paper works fine in another identical printer,  and it is happening before the toner.  

The customer always hates to here it is the paper even though it can cause a lot of problems.  

Thanks for everyone's help!!!!

Anyone have a miracle cure??????

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SteveG00000Commented:
Try it from Tray 1, the MP tray, does it happen then?

If it still happens then it is likely to be happening during the registration process.
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wyliecoyoteukCommented:
printerguy's answer is good, the "guide " is a paper seperator tab, try and match it to the same angle as the one on the other side
Also check that the paper lift tray is moving freely.
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printerguyCommented:
What's up with this 'centrepc'?? The correction I mentioned is a very 'minor' bent in the paper guide. It will only take 2 minutes to check this out..
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wyliecoyoteukCommented:
printerguy is right, you should at least respond
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SteveG00000Commented:
Why should he respond lol, I have tried to help loads of people and only got a couple of responses, must admit that it is a little anoying though.
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wyliecoyoteukCommented:
You get used to it :)
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