This is a decent explanation of how a laser printer works:
http://home.att.net/~t.f.cook/tc11.htmI also seem to remember that in the early days at least, there were two
different types of toner because the laser printers tended to be the reverse
polarities on the coronas than the copiers.
Mike Nash
----- Original Message -----
From: "Jan Kok" <kok@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, February 26, 2004 12:20 PM
Subject: RE: [Homebrew_PCBs] running copper sheets through laser printer
> Stefan wrote:
> > hmmmm doesn't work this theory. that would mean the charging of the
> paper
> > is unnecessary because
> > the charge will equalize at contact with the drum.
> > this in turn means the corona wire is useless, which is ridiculus
> because
> > they would not have one then.
> >
> > Damn, i don't know.
> >
> > How does this really work?
>
> Black magic :-) I understand it took many years of development to get
> from idea to working Xerox copier.
>
> For that matter, how does an electrostatic precipitator work? Say a
> dust particle picks up a positive charge and is attracted to a negative
> electrode. As soon as it touches the electrode, it should get a
> negative charge and be repelled from the electrode, right? Why do the
> dust particles continue to stick to the electrodes, which are typically
> clean bare metal, no glue or anything to hold the dust on the
> electrodes?
>
> Cheers,
> - Jan
>
>
>
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