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  The new CON-50 converter..., December 30, 2013
By red...
The new CON-50 converter design with the moveable 'weight' is superior to the original piston converter which had problems. With the old design, ink would often get stuck up at the wrong end of the converter and ink flow was affected. Now, with the help of the small, cylindrical weight, gravity will pull the ink down towards the feed nipple when a Pilot pen is moved into the writing position.

Montblanc and Montegrappa also modified their converters in this way several years ago. The weight makes up for a flow problem that often occurs with converters that inhibit the intended exchange between air and ink (L. Waterman realized this need). Many converters are not designed or made correctly and extra air leaks into a converter throwing off the special balance between ink going out and air coming in to replace the ink. If the ink doesn't move back and forth in the converter the way water moves back and forth in a carpenter's level, something is wrong! The new CON-50 helps make up for a converter deficit.

The redesigned CON-50 should fit most cartridge/converter Pilot/Namiki fountain pens, like the 'Capless/Vanishing Point' and Pilot Prera fountain pens.
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