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Topic: Sharper Image vacuum canister (6 msgs / 132 lines)
1) From: Jim Whitesell
Sharper Image has a vacuum canister for coffee and it WORKS! Runs on  
4 AA batteries and seems to do a good job of evacuating. Had a  
plastic smell inside so I put a half-pound SM valve bag with beans  
inside (the last of my Panama Hacienda La Esmeralda Gesha, not that  
it matters). Although the valve on these bags will not hold a vacuum,  
by the time I got the canister open the bag was still well collapsed  
around the beans. Has a setting so that it will re-evacuate every 12,  
24, or 48 hours.

2) From: raymanowen
My daughter manages a Sharper Image in Cherry Creek, Denver, CO. She gave me
a Bean Vac, but it merely re-evacuates if the internal pressure rises.
Since my beans outgas CO2 even after hitting the grinder, I use their
proclivity to advantage. The CO2 displaces O2 out the top of the fruit jar,
so no oxygen is left to stale our favorite hydrocarbon...
The one-way valve on the valved bags should prohibit air from passing back
into the bag. Do Not Try to evacuate the bags, because the air that >will<
leak back in = 20% pure O2. You are forcing a staling situation for the
coffee.
Just don't disturb the bagged beans, and the CO2 will displace the CO2
naturally.
Cheers -RayO, aka Opa!
Naturally

3) From: L. Michael Fraley, MD
Yeah.. I got one for Christmas, and I love it.  Mine does not have the 
"re-evacuate" setting.  It does kick on whenever it detects that it 
needs to.
Michael
On Apr 7, 2007, at 5:24 PM, Jim Whitesell wrote:
Sharper Image has a vacuum canister for coffee and it WORKS! Runs on 4 
AA batteries and seems to do a good job of evacuating. Had a plastic 
smell inside so I put a half-pound SM valve bag with beans inside (the 
last of my Panama Hacienda La Esmeralda Gesha, not that it matters). 
Although the valve on these bags will not hold a vacuum, by the time I 
got the canister open the bag was still well collapsed around the 
beans. Has a setting so that it will re-evacuate every 12, 24, or 48 
hours.

4) From: Dan Mouer
What's wrong with the VacuVin cannisters. Don't need no steeeeking 
batteries.
Dan

5) From: raymanowen
"What's wrong with the VacuVin cannisters. Don't need no steeeeking
batteries."
However you do it, it takes work to create a low pressure volume [vacuum]
within a higher pressure environment. No seal is perfect, so work has to
continue to be done to remove molecules that reenter the low pressure
volume, and they will carry Oxygen back in with them.
When you remove material from the vacuum, the vacuum has to be released
temporarily- heere comes the Oxygen again, driven back into the coffee beans
under atmospheric pressure.
Rather than swing the pressure pendulum and keep reintroducing the beans to
fresh Oxygen, why not just leave them alone, evolving their own CO2? The CO2
will fill a jar or a bag just like water, and exclude the Oxygen from the
bottom up.
The valve in valved bags doesn't need to seal very well- and it can't really
be as good a one-way valve as the seal discs on a fruit jar. The fresh
roasted coffee beans evolve CO2, with the bag oriented with the valve or
open end at the high spot, the dense CO2 will displace all the lighter O2
molecules from our favorite hydrocarbons at no charge. Same goes for jars.
If you treat the jars or bags like the CO2 was water or some dangerous
liquid like Sulfuric Acid that you don't want to wantonly spill or slop
about, just dip the beans out of the jar. That way, you won't pour out all
the CO2 with the few beans you want. I know you can't see the gas, but just
imagine it's water, and you won't go wrong. Try to keep it in the jar.
CO2 doesn't cause any staling, Oxygen's the illegitimate hydrocarbon lover.
Cheers -RayO, aka Opa!
Eschew Illegitimate Coffee
On 4/8/07, Dan Mouer  wrote:
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-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976

6) From: Floyd Lozano
What the world really needs is a oxygen/moisture filter so that we can
protect our beans with all the CO2 we make naturally by just blowing into
the package!
-F
On 4/8/07, raymanowen  wrote:
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