email was Mac something something

From: Dwight K. Elvey <>
Date: Thu Jan 13 12:20:14 2005

>From: "Vintage Computer Festival" <>
>On Thu, 13 Jan 2005, Paul Koning wrote:
>> >>>>> "William" == William Donzelli <> writes:
>> William> .... Some of the things were
>> William> pretty cool - a 400 cps (!) paper tape punch, ...
>> Wow. I've love to see one of those. The fastest I have seen was, I
>> think, a 120 cps punch. Listening to one of those running at full
>> speed is pretty impressive.
>> Paper tape readers can go much faster (I've seen 2000 cps) but those
>> are optical readers, so the job is far easier.
>I don't suppose anyone ever manufactured a laser-based paper tape punch?
>Is that even feasible?

 Sure, it could be done. The only reason it hasn't
been done was that the medium was obsolete by the
time the LASERs were ready.
 I used to have fun with a 20W CO2 LASER. I could
control it well enough to remove 6 or 7 layers of
paper. Each time I'd cut a little deeper. It would
make a pop sound and some of the paper would just
be disappear :)
Received on Thu Jan 13 2005 - 12:20:14 GMT

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