RFD: optical.servo.coin.marker

Try to shroud the coin in an argon atmosphere during the etch.

Something removable isn't an option if you're interested in theft protection.

I believe some items (such as integrated circuit packages) are marked by coating the surface with a film and then exposing the film to laser light. This method would leave the option open of removing the film.

Best regards, Spehro Pefhany

Sounds like a tremendously BAD IDEA. You're talking about destroying the surface of the coins, albeit in a minute way. Doesn't seem like all that good an idea.

Actually that wasn't my comment -- Sphero's remark was in reply to somebody named "Draco" who's original comment doesn't appear on my newsreader.

True, but a coin without the plastic coating is just an untouched coin

-- a coin with a big rectangular pit in it the size of an anti-theft barcode is one that says "hello, I'm stolen merchandise".

In Thos. J.'s own handwriting?

there will be no market for such a product -- it would greatly lower the value of the coins. think of something else to scribe ...

--keith

I'm with you. Mark every valuable thing.

Imagine the Declaration of Independence with a discreent UPC in the lower corner.

Did you pick up on his stated dimensions, Tim?

He's talking about a barcode mark that's only about .004" high by .040" wide and barely visible. Shure enough, my tired eyes would never find it without magnification.

I don't think I'd have a problem paying market price for a rare coin with that kind of mark on it, if it gave me even a tiny bit more chance to prove it was mine and recover it if it got "grew legs" and later turned up somewhere.

But it sounds like what he described would be "removable" by someone who knew it was there.

How has this got onto soc.men?

D.

"Spehro Pefhany" schreef in bericht news: snipped-for-privacy@4ax.com...

Did you see lightscribe ? HP uses that for printing DVD's.

Why not just use a metal punch with a serial number. Just postion right in the center or other focal area and and give it a good whack with a hammer. Presto, the coin is marked . Seriously, in this day and age, it would seem prudent to PHOTOGRAPH the coin and store the image for future reference. Why mess with the surface of the coin at all!!?? Best Regards, O.E.Pepper

Just a thought. The rim of the coins are often already ribbed. Is it possible to use these ribs to embed the barcode? Run a stylus or laser beam over the ribs and a barcode sequence can be read.

wouldnt hurt to adjust your clock;)

What? And have the scanner beeping impotently every time you try to scan it? I should think that John Hancock would be your man.

Best regards, Spehro Pefhany

i need some help with new system my company is developing for purpose of marking rare coins with security code system uses precision laser to melt surface making low contrast 1 mm by 0.1 mm barcodes that is essentially invisible to observer unless coin catches light just right you can see system at

i am thinking of using optical servos in attempt to search the perfect power setting is anyone here familiar with such optical servos devices?

"Genome" wrote

EEEEEEKKK!!!

PLEASE only do that to circulated Susan B. Anthony dollars and Eunice Shriver Commemoratives.

-- John

Visit the RCCers favorite coins web page

This post looks suspicious and may be a troll.

, (note the added s's), is used by another poster in s.e.d, but he doesn't use supernews either.

Neither of them use the newsreader used for this post.

The GMT in the time and the inclusion of the demon.local newsgroup suggests one of the Brits who troll d.l.

I use R200 and inkrepublic.com 's bulk ink system to handle my DVD printing. These are great tools for moonlight business.

Great deal from Office Depot for the r200