Jewel tip capillary pen

Claim 1

In a capillary inking pen system for use with recording apparatus including an ink supply and ink conduit means from the ink supply, an improved writing pen construction comprising: a stainless steel capillary pen tube in fluid communication with the ink conduit means, a pen tip formed on the lower end of said pen tube, a jewel insErt spigotted up into the end of said pen tip so that it is disposed entirely within said pen tip, out of contact with a surface being written upon, said jewel insert being disposed so that its lower terminal end is located coincident with the apex of a concave meniscus of ink at the lower end of said pen tip, and means defining a single microcapillary passageway through said jewel insert for communicating ink from the writing pen to a point beneath said jewel insert and above the surface being written upon, whereby said jewel insert acts as a plug to minimize the entrance of air into the main body of the writing pen while providing said single microcapillary passageway, being of sufficient diameter to communicate ink from the writing pen main body to said point above the surface being written upon.