The woes of vacuum - how I wrecked my shop built duct collector before I finished it

On 16 May 2004 17:54:26 -0700, tillman snipped-for-privacy@comcast.net (tillius) brought forth from the murky depths:

Yeah, Crapsman really sucks, doesn't it? (couldn't resist that straight line)

Har! Got JPGs? ;)

Or rig up a failsafe device. Cut a 3" square hole in the intake line before the first stage fiber can, then duct-tape a piece of trash can liner (or whatever) over it. When the hose gets plugged, it'll suck a hole in the "failsafe" and prevent collapse.

--- - Sarcasm is just one more service we offer. -

Im not so sure, i've seen (mylar) *thin* foil of about that size stand on-sided vacuum without breaking, and i'm talking "real" vacuum (10^-3 mBar) here.

Just keep in mind that the strongest vacuum EVER is only 14.7 psi below atmospheric pressure. Less than 15 psi! Weak as worms' water!

On Mon, 17 May 2004 09:30:56 +0200, Juergen Hannappel brought forth from the murky depths:

So don't use Mylar, Milo. Use a second-hand baggie, trash can liner, latex glove, whatever. Test it (without the collapsible can) to make sure it works. Man, do I have to -think- for you guys, too? ;)

-- Remember: Every silver lining has a cloud. ----

Try prying something apart in a vacuum bag.

For 4 square inches, that'll be