Homebrew PCBs

That's an interesting mechanism of pumping fluids. After 
Markus mentioned Bungard and patents I had a quick search
The bungard site is http://www.bungard.com/seiten/home.htm

For a drawing from the original patent (or one of them) then 
go to the link below and then go to the drawing page by 
clicking on the "Drawing" button at the top of the screen.
note that this URL may be broken by line wrap around.

http://l2.espacenet.com/espacenet/bnsviewer?CY=ep&LG=en&DB=EPD&PN=DE2444476&ID=DE+++2444476A1+I+





Stefan Trethan wrote:
> 23.04.2003 17:27:08, Markus Zingg <m.zingg@...> wrote:
> hi
> 
> the three holes, are they straight through or are they at an angle drilled?
> (and please stay with the mm, the guys out there really should accept that the metric system is a great 
> thing and inches, feet, yard, etc.. is very complicated and difficult to calculate with. i also believe 
> they have a better feeling of a millimeter than we have of 5/8 inch or so...)

[snipped]
> 
> a questions for the professionals here:
> which glue resists HCL (CuCl2) etching? (does silicone or acrylic mass resist?)
> and would it be enough oxygen regenerating the etchant when leaving the sprayer on some time?

Any solvent based glue will be ok in acid. Silicone should 
ok, but due to nature of salt solution ("salt creep") I've 
found silicone to be less reliable for long periods. Try buy 
ready made containers and modify them to suit your needs. 
Unfortunaly most molded containers are PP or PE plastic and 
cannot be glued at all. The only proper way to make a 
container from the beginning is with PVC and a plastic welder.

I'm not sure if the sprayer (its really more of a forceful 
splashes) would give the same contact area as lots of fine 
bubbles. It'll be something you'll have to just try.

I know with combination of fine bubbles and floating foam 
the regeneration is so fast that the solution heats up 
significantly.