Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, Lez (lez.briddon@) wrote:
>
> Same setup as I am going towards here, but using a photo 900p cd 
> printer.
> 
> 
> Isnt a spongeless cartridge a cartridge with the sponge removed, or
> would it not be that simple.
> 

Inkjet cartridges have a sponge in order to prevent the ink from 
draining too rapidly into the print head, thus leaking. They also, 
however, take up a huge amount of space that ink could otherwise use. 
And if you keep refilling a cartridge, the sponge can eventually break 
down and wind up clogging the printer.

The first line of spongeless cartridges were just carts with the 
sponge removed - and they leaked all over the place. Newer versions 
have a system of valves and vents that maintain the same kind of 
'pressure' that a sponge cartridge would have. They often have a tiny 
filter as well, since the sponge also serves as a filtering device.