FOUNTAIN PEN Russian patent published in 1998 - IPC

FIELD: use of under zero-gravity and ordinary conditions. SUBSTANCE: fountain pen has barrel and tag which form barrel-piston pair and threaded pair. Space of barrel-piston pair communicates with barrel cavity and with surrounding atmosphere. Space of barrel-piston pair may be selected arbitrarily with due regard for degree of ink paste consumption and physical parameters (viscosity, adhesion to surface, when writing). Tag is removed for arbitrary distance. Then hole through which space of barrel-piston pair communicates with surrounding atmosphere is overlapped by finger, tag is moved to barrel and fixed by means of threaded connection. When threaded connection is screwed in, cavity of fountain pen barrel becomes airtight. EFFECT: improved tight. 1 dwg