Xref: utzoo comp.misc:6036 comp.lang.postscript:2115
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From: larry@kitty.UUCP (Larry Lippman)
Newsgroups: comp.misc,comp.lang.postscript
Subject: Re: Laser Printable Checks?
Summary: Some developers ARE magnetic
Message-ID: <3155@kitty.UUCP>
Date: 10 May 89 01:06:55 GMT
References: <12810@jade.BBN.COM> <555@lzaz.ATT.COM> <1103@cantuar.UUCP> <1325@lzfme.att.com>
Organization: Recognition Research Corp., Clarence, NY
Lines: 34

In article <1325@lzfme.att.com>, jwi@lzfme.att.com (Jim Winer @ AT&T, Middletown, NJ) writes:
> > > Well, not sure, but I think the toner used in LaserWriter cartridges
> > > is *already* magnetic! I dismantled a toner cartridge once, and found
> > > it contained a magnetic roller which the toner particles clung to. As
> > > the roller was rotated, the toner sort of crept around it in response
> > > to the changing flux direction.
> > 
> > 	I don't known anything about LaserWriters or laser printers
> > which use cartridges, but in more rugged laser printers (such as the
> > Xerox 4045) there is a magnetic material used that is called "developer".
> > The developer is "recirculated" within the laser printer and does not
> > mix with the toner after it has been despoited on the drum.  In a
> > normally functioning laser printer no portion of the developer is
> > actually fused upon the resultant copy paper.
> 
> Neither the developer nor the toner is magnetic.  They are
> electrostatic.

	This is simply not true of all laser printers and xerographic
copiers.  While I don't have a complete listing in front of me, I can
tell you with certainty that:

1.	MAGNETIC developer is used in the Xerox 2020, 2300, 2350, 2600,
	3100, 3107, 3109, 3400 and 3450 xerographic copiers.

3.	MAGNETIC developer is used in the Xerox 4045 laser printer.

3.	MAGNETIC toner is used in the Xerox 2020, 2300, 2350, 2600,
	3100, 3107, 3109, 3300, 3400 and 3450 xerographic copiers.

<>  Larry Lippman @ Recognition Research Corp. - Uniquex Corp. - Viatran Corp.
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