Spiral Tube Pen Ink Refilling Ball Point Pens
A ballpoint pen is a writing instrument with an internal ink reservoir and a sphere for a point. The internal chamber is filled with a viscous ink that is dispensed at its tip during use by the rolling action of a small sphere.
There are two basic types of ballpoint pens:
Disposable pens are chiefly made of plastic throughout and discarded when the ink is consumed; refillable pens are metal with some plastic and tend to be much higher in price. The refill replaces the entire internal ink reservoir and ballpoint unit rather than actually refilling it with ink, as it takes special high-speed centrifugation to properly fill a ballpoint reservoir with viscous ink.
The simplest types of ballpoint pens have a cap to cover the tip when the pen is not in use, while others have a mechanism for retracting the tip. This mechanism is usually controlled by a button at the top and powered by a spring within the pen body, but other possibilities include a pair of buttons, a screw, or a slide.
Double Ink Capacity Pen Ink Refill Ball Point Pens
Think about it. Instead of having a straight tube pen ink refill, how about fashioning it as a spiral? It occupies a bit more space, so the pen can’t be sleek and slim, but it holds double the amount of ink! There’s a reason why our DNA is structured in a double helix. I guess it will work like a charm for those disposable types, making them last longer.