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Hello, I just sold an Okidata MPD 711C Printer to an account and it is wrinkling / crinkling envelopes big time. They only do them occasionally and this is the first time they have tried so the machine never printed them ok before either. It actually is crushing them as they go through the fuser because the rollers are so tight. You can see the impression of the back flap and back seams in the front of the envelope it is squeezing them so hard! At the very end the wrinkling shows up because it has compressed it so hard it stretches the paper a little and so there is excess paper with no where to go if that makes sense.

There is no adjustment that helps and Okidata does not have an answer. I have tried various paper weights in the driver and on the printer's panel and different envelopes with no improvement. I leave the back door open but there is no improvement over leaving it closed. There is no adjustment on the fuser. A Monochrome model we have does have a setting for the blue release lever to go in an up position for envelopes. I bet this is a clue they should have done that with this one.  I can see the problem clearly - it is just compressing them so hard it's ridiculous! There is actually no paper type setting for envelopes, just bond, labels, heavy 1 2 or 3 and rough. I tried them all with no difference.

Has anyone actually opened up the fuser and adjusted the springs inside to lessen the pressure a little so this doesn't happen? Not sure that would really work though. Others must have had this problem, I can't be the only one. I am so sorry I sold this machine that can't print on envelopes!

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Yes, I changed everything at the printer and in the driver. A tech went by also and he came up with the same conclusion. I am going to have to either provide a separate envelope printer or take the machine back and sell them some thing else (if they will do business with me after this). Yea, I wish I had sold them a Ricoh to begin with. Oki had convinced management that they were a better alternative. Guess no one tested the envelope feeding...

The embossed effect is 'normal' for all Oki printers - comes from the very high fuser pressure as you noted. This is actually preferable for flat sheets, and the Oki is an office machine never intended for envelope production.

 

As someone who owns 10 Oki 9800's and produces 1.8 million envelopes for the trade, I have only had 2 customer rejections in the past 5 years of operation.

 

The new Oki I evaluated was the 941, and the effect was a little less apparent but still there. As Art stated, the Ricoh 831-841does not suffer from this excessive compression. It is also marketed as the Xante Impressa.

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