Introducing the Pump Piston Filler
The Pump Piston filler is a high capacity filling mechanism that is powered by a piston unit activated along a piston rod. The rod attaches to the piston unit via three spokes easily and freely. Once the piston rod is secure in the J-lock on the piston unit, the piston unit can be detached from the piston connector at the back of the pen by turning the piston knob counter-clockwise and be pushed towards the section, which expels the air in the barrel.
Before pushing the piston unit, we suggest using the rod to spin the piston unit in place in order to break the surface tension between the o-rings and the pen barrel to have the smoothest filling experience possible.
Once the piston unit is secure on the rod and detached from the piston connector, submerge the nib into ink or water and draw the liquid into the barrel in a single swift pulling motion to create a vacuum in the barrel and fill the pen. Once the pen has been filled, unlock the rod from the J-lock and secure the rod into the pen.
The Pump Piston filling mechanism is one of the most complex modern filling systems to date. We have spent years to research and develop this mechanism to give users the ultimate flexibility in how you want to use your pens. Named for the pumping action in order to fill the pen, we have created the most simple to use internal filling mechanism in fountain pen history.
The Pump Piston filler is designed to allow the user to fill as much or as little ink as you want. You can unhook the piston rod at any point of filling and return the rod to it’s resting position, leaving the piston unit at the front of the pen close to the section, or in the middle of the barrel. This not only gives you the advantage of controlling how much ink you fill, it also changes the center of balance of the pen to help you find the perfect balance for your hand. It also allows you a small degree of control around ink flow by controlling the amount of air in the barrel.
The rod spokes act as agitators when spun around, which means that ink will not be stuck on the walls of the barrel and shimmer or pigment particles can be broken up. At the end of the rod, there is a valve that seals against the section to prevent leakage during air pressure changes.
The rod in the pen can activated by unscrewing the piston knob of the barrel.
There are 3 spokes (or prongs) machined into the rod, which slide into the hooks of the piston head.
By default, the piston head is locked into the end of the barrel to the piston connector with threads.
When locked, the piston head must be unlocked from the barrel by engaging the spokes/prongs into the hooks of the piston head and turning it counter-clockwise.
Once the piston head is freed from the piston connector, it can be pushed along the barrel with the spokes/prongs engaged in the hooks.
Immerse the nib and feed into the ink and pull the rod to draw ink into the barrel of the pen.
Lock the piston head back into the piston connector by gently pulling the piston knob while turning it clockwise. Take care to NOT overtighten the piston head, as it may get stuck and difficult to unlock on the next use.
Disengage the rod from its hook and return it to its original position.
Warnings
We recommend the use of dye based fountain pen inks ONLY. Use of pigmented inks or iron gall inks may leave visible residue inside the clear barrel that cannot be removed.
Shimmer ink can be used, but the shimmer particles can remain in the barrel or leave visible residue around the o-rings. Similarly,
Self disassembly is not officially encouraged and any damage caused by disassembly is not covered under warranty.
Please place your pens on a pen tray or a pen rest when not in use at a desk. While the materials used in the Kyuseido Kakari and the Kyuseido Kosumi lines are of the highest quality, vertical impact may cause damage to the pen. Repairs are possible but will carry a repair fee.
When writing, be sure to unscrew the piston knob in order to allow ink to flow between the barrel and the feed. Ink flow may be constricted when the piston knob is closed.
Please do NOT attempt to self-repair. Always contact your Authorized Retailer first if you are having issues with your Pump Piston Filler.