Homebrew PCBs

ST,

read everything the manufacturers in a given field have in their 
literature. On their website... Trico and EFD are two of the "big 
players" in Dispensing.

Reading patents at www.uspto.gov can be VERY enlightening...

Search on "dispensing EFD"... (I think that's what I ended up using)

Note that many patents are expired and can be used freely. Many 
others can be licensed. Some will just give you ideas...

IMO, don't mess with copying an unexpired patent without permission! 
It is a FALLACY that you can USE a patented idea for your "own 
personal use" without selling it to anybody. While you might "get 
away" with this, it's NOT legal.  

Ballendo

P.S. many mfrs. will list their patent numbers on their website. Even 
expired ones. To "scare" you away... Read 'em.

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan <> You say you 
have made such a machine, tell me more.
> Especially tell me what you do about your software, and
> how the pneuamtic plunger works. i think i have all components
> for a pneumatic system here (pump, pressure regulator, several 
solenoid 
> valves).
> I think it has some potential advantages and would like to give it 
a try.
> I do not remember exactly how the air was coupled to the syringe, 
would it 
> work
> to simply apply the air pressure to the already existing plunger-
back and 
> seal
> off the syringe housing?
> 
> thanks
> 
> ST