Question about the ADF of a scanner.

[Tom Buskey]

On Mon, Mar 16, 2009 at 10:26 PM, Dan Jenkins <dan at rastech.com> wrote:

> Michael ODonnell wrote:
> >> feed rollers on some scanners and printers.  Basically, they
> >> get glazed and cannot pull the paper.  Cleaning the feed rollers
> >> helps sometimes.  Typically I use alcohol to clean them and then,
> >> if I'm still having a problem, a very, very mild abrasive
> >>
> > I'll second that and as an aside I'll comment (having
> > run printing presses and mail processing equipment in a
> > previous life) that automated paper handling is a problem
> > that gets %0.01 of the respect it deserves.  Considering the
> > essentially infinite combination of infuriatingly subtle
> > variables (static electricity, fiber quality, temperature,
> > moisture [ambient as well as absorbed], friction coefficients,
> > roller degradation, fouling by dust/grease/fibers, etc, etc)
> > it's a fscking miracle printers work at all, never mind that
> > most of the time you don't even have to think about them.
> >
> Amen. I've worked in & out of the printing & publishing industry for
> about thirty years. Good pressmen have amazed me getting good print out
> of poor ink and lousy paper and quirky presses.
>

I ran tests for a company developing a color printer ink jet in 1988.  They
had an issue with jams when wear started.  We tried alcohol & increasing the
force onto the rollers, It required a redesign of the paper path.

With the new path you could crumple the paper, flatten it, then feed it at
300 dpi.  You could feed a piece of cloth through and get a decent print
onto it.
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