How does a Pilot Vanishing Point Fountain Pen Work?
The part that makes this pen so unique is the complex mechanism behind the effortless click-action. Pressing the push button on the back-end of the pen opens a spring-loaded door at the business end of the pen, revealing the tip of a 18kt gold nib that patiently awaits to perform. Below is a cross section diagram of the Vanishing Point's mechanism, showing how the magic happens.
Clicking the push button again retracts the nib back into the body of the pen, closing the door to the front-end and stowing the nib away for writing at a later time. The door closes with an air tight seal so that the nib's ink supply does not dry out.
For some writers, holding a Vanishing Point can take some getting used to. The pen's clip is positioned to start at the tip area where fingers would grip the pen. The design of the pen anticipates that your fingers would hold the pen on either side of the clip, but if that is not your writing grip style, then you may be fighting with the VP's protruding clip.
Although the clip is essential to providing the additional convenience feature of this pocket-friendly pen, it is possible to remove the clip through some tinkering.