Abstract: An ink writing implement has a front part with a writing tip that comes into contact with the writing substrate, and a writing fluid cartridge whose interior chamber containing the writing fluid is tightly sealed before being put into use, and which is connected to the front part during use. There is also provided an equalization system disposed inside a housing and connected by one end to the interior chamber of the writing fluid cartridge and by the other end with the outside air. The writing fluid cartridge and front part are rigidly attached to one another. The front part can be inserted into the equalization system through a back opening and moved into a position in which it protrudes beyond the front opening in the housing.

Abstract: This invention relates to a writing instrument wherein a temporary ink storage member made of a synthetic resin injection molded article is sandwiched between a pen tip and an ink tank. In the present invention, a flange portion for fitting to a predetermined apparatus, which is positioned around an outer peripheral portion of the temporary ink storage member, is formed integrally with a shaft made of a synthetic resin injection molded article. In embodiments of the invention, the temporary ink storage member is made flexible, the shaft is made of a material which is softer than that of the tip holder, and the tip holder is used as a writing thickness display member. The temporary ink storage member can be used as an ink color display member and a cap is used as an application display member. In other embodiment, the cap can be fitted selectively in accordance with types of writing instruments.

Abstract: A technical pen, in particular for use in a drafting instrument such as a plotter, with a writing tube (4) fixed in the front end of a pen tip (1, 2, 3), into which a cleaning wire (5), fastened to the front end of a drop weight body (6), extends, has a device (20, 23, 24) for monitoring the writing fluid level in a buffer chamber (15) disposed between the front end of the inner bore (7) and the back end of the writing tube (4) as well as for activating a conveying means (25) for transporting writing fluid from the inner bore (7) into the buffer chamber (15) when the writing fluid has fallen below a pre-determined level. The buffer chamber (15) is formed centrally symmetrical in relation to the center axis of the writing tube (4) and its inner and outer boundary walls (16, 17) converge from the front to the back. The front area of the buffer chamber (15) is connected with the writing tube ( 4) and the inner bore (7), while its rear area is closed.

Abstract: This invention relates to a writing instrument wherein a temporary ink storage member made of a synthetic resin injection molded article is sandwiched between a pen tip and an ink tank. In the present invention, a flange portion for fitting to a predetermined apparatus, which is positioned around an outer peripheral portion of the temporary ink storage member, is formed integrally with a shaft made of a synthetic resin injection molded article. In embodiments of the invention, the temporary ink storage member is made flexible, the shaft is made of a material which is softer than that of the tip holder, and the tip holder is used as a writing thickness display member. The temporary ink storage member can be used as an ink color display member and a cap is used as an application display member. In other embodiment, the cap can be fitted selectively in accordance with types of writing instruments.

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 stylo pen tip, in particular for use in drafting plotters, has a writing tube (5) in the front end, into which a cleaning wire (6) extends from the rear, which is fixed at the front end of a drop weight body (7) which is movable back and forth axially to a limited degree in an inner bore (8). The inner bore (8) is connected with a writing fluid reservoir (4), which surrounds at least the front section of the inner bore. Coaxially to the inner bore (8), a pressure equalization chamber (11) is provided, the inner end of which is connected with the writing fluid reservoir (4) and the outer end of which is connected with ambient air. At least a portion of the pressure equalization chamber (11) is surrounded by the writing fluid reservoir (4). The inner end of the pressure equalization chamber (11) lies on the front end of the inner bore and its outer end in the area of the back end of the stylo pen tip.

Abstract: Protective cap for capillary writing instruments comprised of a relatively flexible outer casing and a relatively rigid inner casing. One end of the outer casing is adapted to form a substantially fluid tight seal on the body of a writing instrument. A flexible sealing means, e.g., spherical, is positioned between the inner sheath and the outer sheath so as to form a substantially fluid tight seal on the tip of a writing instrument inserted into the inner casing and placed in contact with the sealing means. In another embodiment the sealing means located between the outer casing and inner casing is eliminated and the outer casing forms a substantially fluid tight seal by directly contacting the writing instrument tip.

Abstract: A stylo pen tip has a front part (2) supporting the writing tube (6), on which a writing fluid cartridge (10) has been placed from behind with its front section. The front end area of the writing fluid cartridge (10) forms a narrowed, elastically stretchable opening cross section (12) which, in the operating position, grasps a protrusion area (8) formed on the front part (2) from behind. An auxiliary tool (19, 20) can be placed from the front on the front part (2) and can be brought into stretching engagement with the stretchable opening cross secion (12) of the writing fluid cartridge (10) in order to allow a separation of the front part (2) and the writing fluid cartridge (10) from each other.

Abstract: A stylo pen tip with a drop weight body (7) which is located inside an inner bore (6) of a housing (1,1') connected with the writing fliud reservoir (16) and which has a cleaning wire (8) at its front end extending into the writing tube (2) supported on the front end of the housing (1, 1') has a drop weight safety (13) supported therein which is pivotable around the longitudinal axis of the housing (1,1') and which is in interlocking contact with the drop weight body (7), which can be moved back and forth axially in a limited way in relation to it. In its forward position the drop weight body (7) adjoins with its front end (10) a stop face (9) formed in the inner bore (6). The plane of the front end (10) of the drop weight body (7) and the plane of the stop face (9) are inclined towards each other. By turning of the drop weight body ( 7) the extension of the cleaning wire (8) beyond the front end of the writing tube (2) can be adjusted.

Abstract: A drop weight for a tubular writing instrument has a drop weight body consisting of an upper and lower part (20; 22). The lower part (22) has a front support surface for supporting the drop weight body in its front position inside the tubular writing instrument, and the cleaning wire (21) is fixed to the bottom of the upper part (20). The two parts (20, 22) can be axially moved in relation to each other, by means of which the distance between the front support surface and the front end of the cleaning wire (21) can be altered. In this way the projection of the cleaning wire (21) beyond the end of the writint tube (11) can be adjusted. Further, to set the projection of a cleaning wire (103), provided at the front end of a drop weight body (115), beyond the front end of the writing tube (102) of a tubular writing instrument, a bush element (116) having a shoulder area (117), is clampingly fastened on the drop weight body (115 ).

Abstract: A drop weight for a tubular writing instrument has a drop weight body consisting of an upper and lower part (20; 22). The lower part (22) has a front support surface for supporting the drop weight body in its front position inside the tubular writing instrument, and the cleaning wire (21) is fixed to the bottom of the upper part (20). The two parts (20, 22) can be axially moved in relation to each other, by means of which the distance between the front support surface and the front end of the cleaning wire (21) can be altered. In this way the projection of the cleaning wire (21) beyond the end of the writing tube (11) can be adjusted. Further, to set the projection of a cleaning wire (103), provided at the front end of a drop weight body (115), beyond the front end of the writing tube (102) of a tubular writing instrument, a bush element (116) having a shoulder area (117), is clampingly fastened on the drop weight body (115 ).

Abstract: Apparatus for screwing a writing instrument tip into a writing fluid reservoir in a writing instrument in which the connection from the reservoir to the tip, in order to supply the writing fluid to the tip, is made by the screwing action just prior to using the writing instrument, in which the writing instrument tip has at least a first working surface upon which at least a second working surface of a wrench acts, the working surfaces being formed as a ratchet and pawl which only engage in a screwing direction and permitting a relative rotation of the working surfaces in an unscrewing direction. As a result the tip cannot be unscrewed from the writing fluid reservoir, avoiding contamination, air entry or blockages.

Abstract: A washing liquid cartridge removably positionable in a writing instrument of the type having a removable ink container. The washing liquid container contains therein a washing liquid and has an engagement portion at one end removably engagable with an inner element of the writing instrument and an openable seal adjacent to the engagement portion. When the seal of the cartridge is opened and the cartridge is snugly fitted in position within the writing instrument in place of the ink container, the washing liquid in the cartridge flows and washes the ink passage within the writing instrument.

Abstract: A writing implement for use in numerically controlled drafting machines has a tip with a front end face which is maintained at a distance of a fraction of one millimeter from the surface of a sheet of paper or another carrier of information by a portion of a ball which is rotatably mounted in a socket extending rearwardly from the front end face so that the surface of the carrier and the front end face define a capillary gap. This gap draws ink from the socket which receives ink from a channel extending into a reservoir in the housing of the implement. The channel contains several rib-shaped back supports each of which is in mere point contact with the adjacent confined major portion of the ball in the socket so as to center the ball in the socket whereby the confined major portion of the ball and the surface surrounding the socket define a capillary clearance, and to provide paths for the flow of ink from the channel into the socket.

Abstract: To screw the writing tip in and out of the instrument shaft of a writing or drawing instrument, the cap has been used as a screwing tool. The cap is usually fabricated with a many-sided receiving bore for this purpose as an extension of its bore, which can be placed onto the writing tip after the cap has been turned around. As a result, the cap is relatively long. The writing or drawing instrument of the present invention in contrast, has a cap of standard length. A many-sided receiving bore which is to be placed on the writing tip, in order to be able to screw it in or out, is formed, in part, by the clip of the cap, and in part by the wall of cap in the region where the clip is connected to the cap.

Abstract: The housing (1') of a writing point (1) or tracing element for manual ink writing or drawing instruments or for plotter or similar automatic or mechanical tracing machines is or can be linked with a shaft (40) that contains the ink and/works as a holder and/or storage. The housing has also a compensating system and a writing body (1") and if necessary other parts. It is provided with a supply system having in the area of the housing (1') several annular spaces (52 and 57) arranged axially one after the other and having different capillarities, their capillarity increasing one or more times in the direction of the writing body (1"). At least one annular space is conically shaped (53) and has a capillarity different from that of the writing body (1"), increasing in the direction of the latter.

Abstract: Tubular writing pens of the stylographic type, as used by artists and technical draftsmen. Particularly a tubular writing pen having superposed inner and outer ink pressure equalization chambers defined in the cylindrical pen body. A removable outer sleeve complementally engages the cylindrical body of the pen, to cover the outer pressure equalization chamber. A locking surface is defined in the removable sleeve rear edge, so that the sleeve may not be removed accidently with consequent ink loss and damage.

Abstract: In a tube pen tip with a writing tube (3) supported in the front end of a pen body (1) where the writing tube (3) is pivotable against a resilient pressure means in a limited way in all directions around a point located on the writing tube center axis (11) and inside of the pen body (1). The rear end of the writing tube (3) is movably braced against axial displacement by a guide surface (6) that is centrosymmetrically located in the pen body (1) on a central axis (11) of the unpivoted writing tube (3).

Abstract: An axially removable cylindrical holding shaft or cap for placement over and for unscrewing or removing the tip of a writing or drawing instrument, the holding shaft or a cap having a receiving bore for the instrument tip, and being comprised of at least one approximately axially extending lever which can be tilted about an axis extending approximately tangentially to the cylinder wall. The lever has an arm on each side of the axis. One of the arms forms part off the wall and has a detent at its end, the detent projecting into the receiving bore for engaging a groove or an undercut of the tip when the tip is inserted into the receiving bore, fixing the tip in the axial direction. The structure makes it possible to clean the adjustment system of the tip, avoiding the danger of getting it dirty, and without touching the tip while reinserting it into the housing.

Abstract: Improvements in stylographic technical writing pens, particularly through a venting channel design which provides for a pressure balancing, or equalization, between an ultimate ink reservoir pressure and the total pressure at the writing tip; as writing depletes ink within the reservoir. Particularly, a venting channel, extending from the reservoir to ambient air, has the size of its cross-sectional shape vary as a function of the distance from its communication with the reservoir, with the variation calculated to offset gravitational forces attendant to a moving ink meniscus inside the vent channel. The balancing of total pressures also provides a constant ink flow through the writing tip when writing since the total pressure at the tip is maintained constant by the vent channel configuration.

Abstract: The invention relates to an ink duct for tubular styluses on writing implements with a compensating system and with an air access and escape system and consists substantially of a connecting system between writing tube and ink storage tank comprising capillary gaps, grooves and plane gaps, which ensures a regulated ink flow and a pressure compensation between the storage tank internal pressure and the ambient air pressure. Consequently, even a tubular stylus with a large charge volume, in the case of a non-refillable writing implement for example, is controlled reliably by this system in the case of pressure differences and with the required vibration resistance.

Abstract: The plotter stylus has a writing point (10) which is connected to the ink cartridge (50) via the ink duct (40). The ink duct (40) is surrounded by a pressure compensator (20) and connected thereto. In the pressure compensator a compensator element (21) is provided with annular chambers (23) which absorb surplus ink emerging from the ink duct (40) in the case of temperature or pressure increases. The annular chambers have no capillarity for the ink. Air is introduced via the air inlet orifice (28) located above the chambers (23). The ink cartridge (50) is exchangeable.

Abstract: A draftsman's ink writing instrument having a falling down prevention member axially and movably received in the axial through bore of the outer case. The falling down prevention member is sized and shaped so that it is resiliently biased against the inner surface of an upper, larger diameter part of the axial through bore in the outer case but will not pass downwardly beyond a tapered annular shoulder between the upper, larger diameter part of the axial through bore and a middle, smaller diameter part of the axial through bore.

Abstract: A writing point for a writing or recording instrument is completely or partially formed of a metallic glass or amorphous metal or the writing tip may be provided with a coating or surface layer of metallic glass or amorphous metal.

Abstract: The invention relates to a writing device comprising a storage tank for Indian ink or another writing medium, a housing which is open in the direction of the tank, a tubular pen which is arranged on the housing, a needle which is axially displaceable in the tubular pen, and a drop weight member which is attached to the needle and is displaceable in the interior of the housing. The tank contains a propellant which is subjected to its own vapor pressure and acts directly on the writing medium, and the end of the tubular pen located in the interior of the housing is designed as a valve seat onto which a valve body formed on the oppositely located end of the drop weight member can be sealingly positioned.

Abstract: A writing implement with a sealing element on a closing cap is mountable over a writing insert having a concentric writing tip, wherein the projecting part of the writing insert is provided with abutment faces and threads on which the closing cap is screwed.

Abstract: A writing instrument having a closure cap assembly (1, 2, 3, 4 and 5) which can be placed in a sealing manner on the writing tip (20), whereby a positive engagement with an indentation in the writing tip is established via an elastically deformable finger (8), when the closure cap is in place on the writing tip. On the inner face of the arm (8), oriented toward the writing tip (20), at least one cam face (13) is located in a chord plane of the circle forming the closure cap opening. Whereupon a twisting of the entire mounted closure cap assembly (1, 2, 3, 4 and 5) brings the cam face (13) into engagement with a correspondingly formed wedge face (27) of the writing tip (20), so that the arm (8) is pivoted radially outward, and the closure cap can be removed.

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: A nib having an ink tube of chrome nickel steel, and also a cleaning wire which likewise consists of chrome nickel steel, is subjected to surface hardening by means of a boride process.

Abstract: In a nib structure of a writing instrument of the type having a tubular nib fitted to a forward end of a tubular tip of the instrument, the tubular nib is provided with a concentrically reduced diameter portion having an outer surface gently sloped from the ends toward a middle portion of the nib, and a radiused peripheral edge at a rearward end of the nib. The nib structure provides easy and accurate fitting of the nib into the tubular tip.

Abstract: A writing instrument has a tubular tip and a needle longitudinally mounted within the tubular tip for enhancing the flow of ink towards a writing point of the tubular tip. The writing instrument has a mechanism which provides a smooth flow of ink without forming an air ring or bubble in the passage of the ink.

Abstract: A releasable protective holder for a tip of a writing or drafting implement including a polygonal part, a cylindrical part extending therefrom and a writing or drafting tube on the cylindrical part extending into the holder when theimplement tip is held therein, which comprises a first receiving portion of a polygonal cross section keyed to the polygonal part, the first receiving portion including an annular bottom wall engaging an end face of the polygonal implement tip part, and a second, tubular receiving portion extending from the annular bottom wall of the first receiving portion to a free end thereof, the tubular receiving portion yieldingly surrounding the cylindrical part of the implement tip and defining a bore having at the free end of the bore a diameter smaller than the diameter of the cylindrical part for releasably clamping the implement tip in the protective holder.

Abstract: An ink writing implement comprises a retainer for a floating weight arranged in the axial bore of a retaining box and having an annular planar surface facing a planar shoulder therein. A venting groove and capillary grooves pierce the surface and the retainer includes a spiral ink flow path along the circumference thereof. A floating weight is guided for axial movement in the axial bore of the retainer and the planar shoulder forms an abutment for a front end of the floating weight. The retainer bore is long enough to accommodate the axial movement of the floating weight and this weight defines an axially extending venting channel with the retainer. A front retainer end is cylindrically recessed and comprises a surface defining an ink flow control path in the axial bore of the retaining box, which connects the venting groove and channel with the spiral ink flow path.

Abstract: A writing instrument is described, which includes a writing assembly, a holder for an ink reservoir joined to the writing assembly, a removable barrel secured by rotation to the holder, and a removable cap which, in the closed position, fits over and protects the writing assembly. The cap and writing assembly are rotatably integrated in both rotational directions when the cap is in the closed position, so that removal of the barrel is effected simply by rotating the barrel relative to the cap without it being necessary to remove the cap and hold the writing assembly in the hand.

Abstract: An India ink drawing implement comprises a retaining box defining an axial bore and a tubular drawing point affixed to an outer end of the retaining box for receiving India ink from the axial bore of the retaining box. A retainer for a floating weight is threadedly fastened to a threaded inner end of the retaining box. The retainer defines an axial bore in alignment with the axial bore of the retaining box and comprises an elongated tubular portion extending through the retainer box bore and a bottom closing an inner end of the retainer. A floating weight is guided for axial movement in the axial bore of the retainer and a portion of the retaining box bore. The length of the tubular retainer portion is sufficient to guide a major portion of the floating weight and the bottom of the retainer limits the stroke of the axial movement of the floating weight.

Abstract: A pen nib construction comprising a pen nib and a holder in which the pen nib is fitted. The pen nib is constructed by a plurality of pen nib pieces fixed back-to-back to each other and forming an ink channel extending axially, and the pen nib is provided at its pointed end with long splits and relatively short recesses which are disposed alternately and at equal angular distances. The pen nib contains an ink-containing portion near its pointed end. One end of the holder is divided into a plurality of ink feed tongues which are in contact with the outer surface of the pen nib. The other end of the holder is connected to an ink reservoir of the pen. At least one of the pen nib pieces is provided on its intermediate portion with another split which connects the ink channel with outside of the pen nib. Thus, ink is supplied from the ink reservoir to the pointed end of the pen nib through a plurality of passages including the ink channel and the narrow gap between the pen nib and the ink feed tongues.

Abstract: A writing instrument, particularly a technical fountain pen, has a handle with finger grips that can be adjusted to a desired position while the point is maintained in a predetermined orientation with respect to the writing surface. The finger grips permit the handle to be readily held against twisting in the hand of the user.

Abstract: A device for receiving a writing implement has a housing, a resiliently yieldable sealing member in the housing and adapted to sealingly abut against a writing tubular member of the writing implement, and a wetting member in the housing and located in spaced relationship with a pressure-equalizing passage of the writing implement as well as communicating with the passage. The resiliently yieldable member may be composed of two axially movable balls which are received in a cylindrical portion of the housing and axially limited by two axially spaced collars. The cylindrical portion may be connected with a conical extension which, in turn, may be connected with a further cylindrical portion received in the receiving opening of the housing. These portions may be of one-piece with each other so as to form a one-piece insert member.

Abstract: The invention refers to an improved writing fluid cartridge or writing fluid tank with a connection section at the front end for attachment to a writer, especially a tube writer, wherein the cartridge is divided into at least two sealably separate compartments, one of which having an ink capacity equal to substantially the ink capacity of the writer body.

Abstract: A capillary writing pen of the type having an expansion or compensation chamber intermediate the ink reservoir and ambient air. The expansion chamber is improved such that inadvertent flowing of ink from the reservoir to the capillary pen tip due either to pressure or temperature changes is avoided. The interior wall of the expansion chamber is profiled as a contiguous series of transverse indentations which extend circumferentially about the tubular pen body to provide successive expansion areas for entrapment of air and constrictive areas where menisci of ink are formed. The forming of the menisci entraps air bubbles within the ink and, accordingly, provides increased resistance to capillary flow of ink.

Abstract: Capillary writing pen of the type embodying a sleeve, an ink reservoir supported within the sleeve and a tubular writing point extending from the reservoir and through the bottom of the sleeve. Particularly, a sealing gasket supported within the cover for the sleeve, so as to seal both an expansion chamber leading to the ink reservoir and the tubular writing end or tip. The sealing gasket is characterized by its axial extensibility in the form of a bellows and, thus, accommodates tubular writing points of varying diameters and lengths.

Abstract: An improved writing point assembly for stylographic, or tube pens and a method for making such an improved writing point. The writing tube itself may be formed by a deep drawing operation and then secured, in a surrounding relationship, to the front end of a plastic cylindrical member, which itself may be formed by being injection molded within the writing tube.

Abstract: A receptacle or protective cap for the writing point of a tube writing pen, the pen comprising a writing cone provided with a writing tube and fitted into a sleeve, there being an ink equalization chamber in a space between the cone and the sleeve, wherein the cap comprises an open-ended hollow body adapted to be secured over the sleeve by its open end, the other end being closed, and wherein the cap has an improved inner annular sealing face for engaging against the end of the sleeve when the cap is secured over the sleeve, the sealing face being formed by a layer of soft resilient material attached to an annular rigid base.