It is also contemplated in this embodiment that the pen cartridge may be extended as {TAIL ~ a result} of a pressure applied to {HEAD ~ the edges} of the housing 
It is also contemplated in this embodiment that the pen cartridge may be extended as { TAIL ~ a result } of a pressure applied to { HEAD ~ the edges } of the housing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH