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Lexmark T644 Loud Banging During Envelope Prints

Posted on 2007-11-19
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Last Modified: 2011-07-08
We have a Lexmark T644 laser printer primarily used for printing envelopes.  When printing envelopes, the printer makes a loud banging sound.

If you have a T644, please confirm that this is normal or abnormal.

If you do not have a T644, can you recommend a very quiet laser printer for envelope printing?
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Question by:RPPreacher
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michko earned 500 total points
ID: 20315979
Loud banging noises are not normal.  If you're using the multi-purpose feeder then it may be a bit louder than normal.  Check pickup/guide rollers and other hardware.  Can you feed a regular sheet through the same pickup without extra noise?

Our HP Laserjet 4250 is relatively quiet when printing from the manual feed tray (be it envelopes or regular sized paper).
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Expert Comment

by:chadfran
ID: 22733844
The loud banging when printing envelopes is a feature called "Envelope Enhance".  The noise is caused by the printer blowing air into the envelope to prevent creasing.
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by:michko
ID: 22734207
chadfran - you are posting to a question that has already been solved and closed.  

Not to mention that Lexmark does not "blow air into the envelope to prevent creasing".  The "Envelope Enhance" feature from Lexmark activates the narrow-media sensor.  This senses when an envelope is being printed, and separates the rollers in the fusers so the envelope is not compressed (which can wrinkle envelopes).  The opening and closing of the gap between the fuser rollers can cause a thumping sound.  Not a "loud banging noise".

In the future, please don't post to closed questions, and check your facts before posting to open questions.

Thank you.

michko
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