Abstract: A plastic filler insert for use with (i) a writing instrument having a converter device including (a) a piston-cylinder unit adapted to receive and dispense writing fluid and (b) an aspirating connector, and (ii) a writing fluid container (1) having a cylindrical neck opening (2), which can be closed off with a cap. The filler insert permits refilling, from the container, of the writing instrument. The filler insert includes a closure plate (3) having a sealing edge (4). The sealing edge (4) is configured to be seated on a rim of the cylindrical neck opening (2) of the writing fluid container (1). The closure plate includes a receiving connector (6) formed on the bottom (5) of the closure plate (3). The receiving connector (6) has a cylindrical receiving opening (7), is open toward the outside, and extends into the interior of the container (1).

Abstract: A device for filling a converter with writing fluid, including a connector designed to be sealingly engaged with the orifice of a converter. The connector has an orifice in the shape of an orifice of a conventional ink cartridge. The device also includes a pipe-shaped conduit segment, connecting to the connector and extending into the interior of a reservoir containing writing fluid. The pipe-shaped conduit segment extends from the connector in an inclined fashion to a free end proximate to the bottom of the reservoir.

Abstract: A writing or drawing instrument wherein a housing (1), is provided with a writing point (2) and a writing fluid reservoir (3) within an interior space of the housing. A capillary pressure equalization system (5), that connects the reservoir with the ambient air, has a sensor (7) therein for reacting to the level of writing fluid (4) therein. A suction pump (11, 12) is connected with the writing fluid reservoir (3) through a semi-permeable membrane (10) which lets air through and is impermeable for writing fluid (4). The suction pump (11, 12) is activated by the sensor (7) in response to a level of writing fluid (4) in the pressure equalization system, and aspirates air from the reservoir so as to quickly reduce an overpressure condition.

Abstract: A marker for felt tip pen for use on absorbent drawing materials contains an ink composition based on alkylene carbonates, or mixtures of alkylene carbonates and alkyl carbonates, as relatively high-boiling organic solvents; a water-soluble or water-dispersable dye that is virtually insoluble in the organic solvent; and water.

Abstract: A cutting device comprising a support roller (8) freely rotatable in both directions to absorb the pressure of cutting, and a carrier (9) movable in the direction of the longitudinal axis of the support roller (8) on which is fastened a cutting tool (26,27) which can be brought into contact with the roll of material to be cut and present on the support roller (8). The improvement comprises lowering of the cutting tool (26,27) into an operating position, and raising from the operating position, by turning of an eccentric element (14,34) coupled with a pivotable arm (17) holding the cutting tool (26,27). The cutting tool (26,27) is suspended on the arm (17) and thereby limited in regard to its raising and lowering movement. A leaf spring (21) fixed on the arm (17) is braced on the upper end (28) of the cutting tool (26,27) to exert a penetrating force on the cutting tool (26,27) when the arm (17)is lowered.

Abstract: A writing instrument of the type having a cylindrical body (1), with a forward end that carries a writing tubule (4) and an inner bore which communicates with the writing tip. A separate sheath body (15) is adapted to be covered by a sheath element (9). The sheath body is pushed onto the rearward end of the cylindrical body (1) and defines a compensating chamber (12, 14) on each of its outer and inner faces. The compensating chambers are connected proximate their rearward ends by a connecting bore (13). The inner compensating chamber (14) communicates with the inner bore through a transverse bore (7) provided in the forward area of the cylindrical body (1). A writing fluid tank (11) is mounted by being pushed onto the rearward end of the cylindrical body (1).

Abstract: An automatic drafting instrument of the type supporting a plurality of stylographic pens above a drafting surface. The instrument includes a reciprocating mechanism for lowering the pens from an upper rest position to a lower drafting position in contact with the drafting surface. The device is characterized by a vertically actuable and pivotable sealing element which engages the writing pen tip in its rest position and is actuable vertically downwardly and pivotably away from the pen as it is lowered to the writing surface.