Diaphragm referred to the term used by Parker for the "inverted" rubber sacs used in vacumatic filling pens The sac seals the pen barrel and helps create the vacuum during filling, but does not hold the ink in the sense that a conventional sac does.

-see also:
"Diaphragm" is in the UNSPSC Code "26111902"
  Diaphragm clutch
Ref: 123339/2006-10-01

Other Database Pages Exist for this Phrase:
Barrel ((Fass, Abk?rzung: bbl) Traditionelles Ma? aus der ...)
Barrel (Barrel relates to a volumetric unit of measure ...)

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