Re: ping Danny - old Gaggia lever machines

*alan* wrote:
Ignoring for the moment that there are some folks who do make a fine distinction between "piston-driven" and "pump-driven" machines insofar as the mechanical principles involved are not identical, if "Tex" wishes to lump the two together, then I am puzzled by his website's assertion that "Since 1949, the only true espresso is made using the pump driven extraction process".
In 1938 Cremonesi invented and installed a piston-driven machine in Achille Gaggia's caffe. In 1946 Gaggia started manufacturing piston-driven machines and was awarded a patent in 1947. What's significant about 1949?
--
alan

True, and I personally wouldn't place pump machines and spring lever machines in the same distinction. Lever machines usually have a preinfusion method built in as well as having a declining pressure curve through the pull, both of which can be seen as desireable, depending on who you listen to.


--
Regards, Danny

http://www.gaggia-espresso.com (a purely hobby site)
(apparently bad grammar but I like it that way...)

.

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