Pen dispensers with cartridges and interchangeable tip applicators

An interchangeable tip applicator assembly for dispensing non-flowable material, the tip applicator assembly comprising

• a tip adapter that comprises:
• a tubular body comprising:
• a proximal end,
• a distal end,
• an interior with a first opening at the distal end, a second opening at the proximal end having a first portion of a connection mechanism to receive an applicator tip, and
• an exterior comprising a threaded connection for insertion into a pen dispenser;
• and
• the applicator tip comprising a second portion of the connection mechanism to mate with the first portion of the connection mechanism on said tip adapter.

A pen dispenser comprising:

• a cartridge system comprising;
• a cartridge comprising a cartridge body comprising;
• an open proximal end that connects to a separable interchangeable tip applicator,
• a distal end that is open,
• a separable piston at the distal end,
• a separate distal seal covering the open distal end behind the piston,
• a threaded exterior portion;
• a flowable material contained in said cartridge body;
• and
• the interchangeable tip applicator adapted for insertion into the cartridge body;
• and
• a pen body comprising
• a button-activated ratchet rod that is arranged to push through said distal seal and contact said piston, and
• a barrel key, wherein the cartridge system is threadably insertable into the barrel key of the pen body.