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− | But the most significant | + | But the most significant invention of the company, which is its distinguishing feature, is the revolutionary [[accordion filler]], patented in 1938 ({{Cite patent|FR|854177}}). It's a peculiar variant of a breather tube filler allowing a very large ink capacity, in which the pumping was carried out thanks to an ink sac with accordion walls, and in which the bulb was replaced by a button consisting of a glass ampule inserted to slide in the rear end of the body, that you could press to make the pumping, and also use to see the remaining ink. |
Versione attuale delle 16:54, 26 lug 2014
But the most significant invention of the company, which is its distinguishing feature, is the revolutionary accordion filler, patented in 1938 (nº FR-854177). It's a peculiar variant of a breather tube filler allowing a very large ink capacity, in which the pumping was carried out thanks to an ink sac with accordion walls, and in which the bulb was replaced by a button consisting of a glass ampule inserted to slide in the rear end of the body, that you could press to make the pumping, and also use to see the remaining ink.