On Mar 2, 2006, at 2:20 AM, Russell McMahon wrote:

> But knowing what's involved in driving an inkjet cartridge is
> worthwhile.

Note that HP's thermal inkjet technology is substantially different
in principal than (for instance) piezo-electric inkjets as using on
many other printers.  Presumably finite lifetime of the thermal
elements is one reason for their starting down the "cartridges are
more expensive than the printer" road that Russell dislikes so much.
(technically speaking, there are a lot of good reasons to include
printheads in the easily replaceable ink-unit; it's too bad
economic considerations have made such a mess of the concept.)

BillW

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