Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!ncar!tank!gargoyle!ddsw1!ddsw1!karl
From: karl@ddsw1.MCS.COM (Karl Denninger)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Paper problems
Message-ID: <2624a822-2881.5comp.ibmpc-1@ddsw1.MCS.COM>
Date: 12 Apr 90 17:00:08 GMT
References: <9014@chaph.usc.edu> <17195@well.sf.ca.us>
Lines: 44

>-----
>Response 4 of 4 (10369) by casey at well.sf.ca.us on Thu 12 Apr 90 02:57
>[Kathleen Creighton]
>(11 lines)
>
>Be grateful it's jamming because you'll ruin your printer doing this.  The
>wiper arm on the II (or any Canon-engine printer or copier) cannot accommodate
>wiping both sides--so you'll be left with black streaks forever and ever.
>After printing only *one* page two sides, I've had streaks for several more
>pages.  I can just imagine what 50 would do.

Nonsense.

We do this all the time, with hundreds of sheets per month.

It IS true that you tend to get some contamination of the fuser cleaning
wiper doing this.  It is not debilitating, and goes away instantly if you
change the fusing roller wiper blade (that green blade with the cloth on
the side) or if you remove the wiper and scrape off the fused toner which is
contaminating it.

The contamination is made worse by reversing a graphic-image printed page
and loading that back in.  Thus, if you have one heavily-loaded page of
graphics, and another of text, print the TEXT side first, then reverse the
page.

The one time I saw a REAL problem with this practice the company in question
was running Xeroxed letterhead through their laser printer.  They were
getting HORRIBLE streaking.  On investigation it was revealed that their
copier was a wet-process unit (ie: developer was a liquid, toner was some
kind of slurry) and the fuser in their photocopier was using a much lower
temperature than the Laserjet.... the result being that very significant
amounts of toner were being released by the LJ's fuser and contaminating the
paper path.

Even THAT was cleared by changing the fusing roller cleaner..... it did take
about 10 sheets of paper for it to go away completely.  Our unit gets a
little dirty at times from the "abuse", but cleaning the fuser roller
cleaner has never failed to solve the problem.

--
Karl Denninger (karl@ddsw1.MCS.COM, <well-connected>!ddsw1!karl)
Public Access Data Line: [+1 708 566-8911], Voice: [+1 708 566-8910]
Macro Computer Solutions, Inc.   "Quality Solutions at a Fair Price"