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<noinclude>{{ReferBox|Filling systems}}</noinclude>Introduced by [[Parker]] in [[1933]] with the launch of the [[Vacumatic]] model, it was advertised as the first rubber ''sacless'' filling system.  In fact this is absolutely not true (a classic example of misleading advertising) both because at the time there were already several versions of rubber sacless filling systems, such as the [[plunger filler]] of [[Onoto]]  and the [[piston filler]] of [[Pelikan]], or because in reality the filling always relies on a flexible rubber element, the ''[[diaphragm]]'', even if this does not perform the functions of a tank.  

<noinclude>{{ReferBox|Filling systems}}</noinclude>Introduced by [[Parker]] in [[1933]] with the launch of the [[Vacumatic]] model, it was advertised as the first rubber ''sacless'' filling system.  In fact this is absolutely not true (a classic example of misleading advertising) both because at the time there were already several versions of rubber sacless filling systems, such as the [[plunger filler]] of [[Onoto]]  and the [[piston filler]] of [[Pelikan]], or because in reality the filling always relies on a flexible rubber element, the ''[[diaphragm]]'', even if this does not perform the functions of a tank.  

Among the various filling systems based on the use of a breather tube, the ''Vacumatic'' is certainly one of the most complex, but in reality it is only a reworking of the mechanism of the previous ''[[bulb filler]]'' in which instead of using a pump the compression of the air in the body of the pen is done through the movement of a rubber membrane, the ''[[diaphragm]]'' precisely.  In this case the movement is made by pressing a spring button on the bottom of the pen, which acts on the mechanism that moves the membrane. Repeating the pressure several times results in the same pumping result as a normal rubber pump.

Among the various filling systems based on the use of a breather tube, the ''Vacumatic'' is certainly one of the most complex, but in reality it is only a reworking of the mechanism of the previous ''[[bulb filler]]'' in which instead of using a pump the compression of the air in the body of the pen is done through the movement of a rubber membrane, the ''[[diaphragm]]'' precisely.  In this case the movement is made by pressing a spring button on the bottom of the pen, which acts on the mechanism that moves the membrane. Repeating the pressure several times results in the same pumping result as a normal rubber pump.