STYLOGRAPHE A POINTE SCRIPTRICE

A.STYLOGRAPHE AVEC UN CORPS 2 A POINTE SCRIPTRICE 1 RELIEE A UNE CHAMBRE DE RESERVE D'ENCRE 16, CORPS DONT L'ALESAGE EST RELIE A L'AVANT A UNE CHAMBRE D'EQUILIBRE INTERIEURE 4 RELIEE A UNE CHAMBRE D'EQUILIBRE EXTERIEURE 11 RELIEE A L'ATMOSPHERE, ET EST POURVU D'UNE GORGE AXIALE 5.B.CARACTERISE EN CE QUE L'ALESAGE INTERIEUR S'ETEND, SANS RETRECISSEMENT DE SECTION TRANSVERSALE, SUR TOUTE SA LONGUEUR AXIALE, DERRIERE SA JONCTION AVEC LA CHAMBRE D'EQUILIBRE INTERIEURE 4, TANDIS QUE LA GORGE 5 S'ETEND, DANS LA PAROI EXTERIEURE 2 DE L'ALESAGE, A PARTIR DE LA JONCTION AVEC LA CHAMBRE D'EQUILIBRAGE INTERIEURE 4, AXIALEMENT VERS L'ARRIERE, A TRAVERS LA TOTALITE DE L'ALESAGE INTERIEUR.C.DISPOSITION APPLICABLE AUX STYLOGRAPHES A FEUTRE OU A TUBE CAPILLAIRE. Tubular writing pens of the stylographic type, particularly a felt tip pen. A cylindrical hollow body supports an ink reservoir at one end and a felt tip which extends from the ink reservoir through the front of the hollow body. The tubular body encompasses the writing element, while defining an inner pressure equalization chamber in its outer wall and a longitudinally extending axial groove in its inner wall, exposed throughout its length to the felt tip writing instrument. An intermediate cylindrical piece complementally engages the exterior wall of the cylindrical body, so as to cover the inner pressure equalization chamber and define in its exterior wall an outer pressure equalization chamber, communicant with the inner chamber. An outer sleeve complementally engages the intermediate piece, so as to cover the outer equalization chamber and define at its posterior end a reservoir seat. An ink reservoir cartridge may complementally engage the outer sleeve and the posterior end of the writing body, so as to communicate with the felt tip writing instrument.