[comp.laser-printers] Transparencies for DEC LN03R

V5296E@TEMPLEVM.BITNET (Pete The Gnome Tamas) (06/22/90)

About transparencies:
   I believe there are no real differences between copier & laser printer
transparencies because the engines are very similar. If I am wrong, would some-
one please correct me? Thanks,
                            Pete

amichiel@RODAN.ACS.SYR.EDU (Allen J Michielsen) (07/13/90)

In article <9007120320.AA28442@crayola.cs.UMD.EDU> V5296E@TEMPLEVM.BITNET (Pete
>About transparencies:
>   I believe there are no real differences between copier & laser printer
>transparencies because the engines are very similar. If I am wrong, would some

There are several differences. In the old days, copiers would fuse the toner
at widely different temperatures.  The same is true to an extent with printers.
This isn't much of a problem anymore...  The problem would be that if you used
a low temp transparency in a high temp fuser the result would be melted plastic
in the fuser.  Often to the extent of junking the printer or copier.
Currently the bigger consideration for transparency stock is the hardware
registration design criteria.  Many models and manufacturers use the paper to
block a light beam.  This (these) beam(s) are used to find a edge, corner,
or to tell the machine what tray  or feeder to use.  Other systems either
'feel' the edge of the paper, use hardware to precisely position the paper,
use more sensitive light detectors that 'see' transparency stock as paper,
or something else.  For this reason, it is quite important that the 
transparency stock be compatible with the output device you desire. These
sensors may be at several different locations.....
Commonly, the stock has a white strip on the edge to fool the sensors.  
Often the strip goes to the right side.  Else flip the stock to put it on the
left.  Your stock may have a single strip, 2 strips, 1 dot, 2 dots, 1 row of
dots or 2 rows of dots.  It also CAN be different from side to side.
Generally speaking, as long as you don't find the stripe offensive, I would
just use the stock with 1 stripe.  It generally works with most machines.....
Your mileage may vary.
al