Abstract: A dispensing pipette that comprises a tubular dispensing duct for dispensing a cosmetic product defining a longitudinal passage, the tubular duct having an upper end and a lower end (54), the lower end (54) defining a receiving insert (58) for receiving a ball (34), and a ball (34) rotatably mounted in the receiving insert (58), the ball (34) being designed to dispense the cosmetic product by rotation of the ball (34). The receiving insert (58) has an inner surface (60) facing the ball (34), the receiving insert (58) defining at least one longitudinal channel (70) radially withdrawn away from the ball (34) into the inner surface (60) to allow the flow of the cosmetic product around the ball (34).

Abstract: The Magnetic Exercise Anchor is an exercise device providing an attachment point to anchor resistance bands to a metallic structure, wherein the exercise apparatus includes a series of magnets working as an anchor to serve as an attachment point, which may temporarily affix the device and resistance bands to a metal surface.

Abstract: A refill for a ball-point pen has an ink cartridge and a ball, the ball being arranged in a writing tip provided at the front end of the ink cartridge, wherein at least the writing tip of the ink cartridge is made solely of a copper-zinc alloy of the following composition (wt. %): 28.0 to 36.0% Zn, 0.5 to 1.5% Si, 1.5 to 2.5% Mn, 0.2 to 1.0% Ni, 0.5 to 1.5% Al, 0.1 to 1.0% Fe, optionally also up to a maximum of 0.1% Pb, optionally also up to a maximum of 0.2% Sn, optionally also up to a maximum of 0.1% P, optionally also up to a maximum of 0.08% S, the rest being Cu and inevitable impurities, with mixed silicides containing iron, nickel and manganese embedded in the matrix.

Abstract: Provided are: an oil-based ink composition for a ball-point pen having a favorable feeling of writing, the favorable deepness of a written trace, favorable light resistance, favorable ink stability over time, and favorable pigment dispersibility; and an oil-based ball-point pen refill using the oil-based ink composition. An oil-based ink composition for a ball-point pen comprising at least a dye, a pigment, and an organic solvent, wherein the dye is at least one salt-forming dye selected from the group consisting of salt-forming dyes of alkylbenzene sulfonic acids and xanthene-based basic dyes, salt-forming dyes of alkylbenzene sulfonic acids and triarylmethane-based basic dyes, and salt-forming dyes of alkylbenzene sulfonic acids and azomethine-based basic dyes.

Abstract: A ballpoint pen tip in which ink grooves are formed around an ink guide hole at equally distributed places, the ink guide hole connecting a ball house and a back hole of a holder for holding the writing ball, and the ink grooves radially penetrate through from the ball house side to the front end portion of the back hole. Inward protrusions are formed at positions which are respectively in contact with the rear ends of the ink grooves. If the inner diameter of the ink guide hole is A, the inner diameter of the front end portion of the back hole is B, the diameter of the circle circumscribing the ink grooves is C, and the diameter of the circle inscribing the inward protrusions is D, their relationships are A<B<C, and D<B.

Abstract: Exemplary applicator devices for applying topical oils to an individual are disclosed. Some embodiments of an exemplary applicator device may include a topical oil container and a roller-ball applicator coupled to the container. The roller-ball applicator may include a roller-ball housing, a roller-ball within the housing, the roller-ball being freely rotatable within the housing, and a retention cap configured to retain the roller-ball within the housing.

Abstract: Applicator devices for applying topical oils to an individual are presented. Exemplary applicators may include a topical oil container, and a roller-ball applicator coupled to the container. The roller-ball applicator may include, a roller-ball housing, wherein the roller-ball housing includes a well configured to hold topical oil for application to an individual regardless of the orientation of the roller-ball applicator, and a roller-ball within the housing, the roller-ball being freely rotatable within the housing.

Abstract: A roll-on applicator device (11) for distributing a viscous medium on a surface, that has a fitment (14) and a distributor ball (13) placed in the fitment (14) and partially projecting from one end of the fitment, wherein the fitment (14) has a base element (16) and a retaining element (15) that are detachably connected to each other by connection means (25), wherein the base element (16) is provided with support means (21) for supporting the distributor ball (13) and with a tubular member (17) for the connection to a container (12) and wherein the retaining element (15) is designed such that it rotatably retains the distributor ball (13) in the fitment (14). The invention further relates to a roll-on dispenser (10) for dispensing a viscous medium with a container (12) for the viscous medium and such a roll-on applicator device (11).

Abstract: A plastic container for a roll-on deodorant is described, which roll-on deodorant has a receptacle and a roll cage for the captive, rotatable holding of an applicator ball. The roll cage can be made integral with the receptacle. The plastic container can be produced in an extrusion-blow-molding method from a tube that is for example extruded continuously.

Abstract: The present invention is a ballpoint pen tip in which a tip end portion of a tip body, which includes a ball holding chamber configured to hold a ball, an ink circulation hole formed in a center of a bottom wall of the ball holding chamber, and a plurality of ink circulation grooves extending radially from the ink circulation hole, is caulked inside, so that a part of the ball held in the ball holding chamber projects from a tip end edge and the ball is rotatably held, wherein: a curved contact surface, which has a curvature different from a curvature of the ball, is provided on the bottom wall of the ball holding chamber, and the ball is to be in contact with a contact part which is a part of the contact surface; and between the ball and the contact surface, a first gap is formed to extend from a side of the ink circulation hole up to the contact part such that the first gap gradually narrows from the side of the ink circulation hole, and a second gap is formed to extend from a distal side of an ink circulat

Abstract: Provided are a ballpoint pen tip which can, even if ink having properties which assures that the amount of supply of the ink to the pen tip by shear of a writing ball is sufficient is adopted, prevent partially faint written traces from occurring and provide smooth writing, a ballpoint pen refill, a ballpoint pen, and a method of manufacturing a ballpoint pen tip. A triangular pyramid-shaped recess (42) gradually tapered toward an ink guide hole (36) is provided in the bottom of a ball housing (31), and troughs (44) formed in the recess (42) are utilized as ink reservoirs and ink paths. Because the troughs (44) have sufficient length, width, and depth, the amount of containment of the ink and the amount of supply of the ink are increased.

Abstract: It is an aim to provide a tip unit for a liquid applicator and a liquid applicator that make written (applied) lines to change in thickness and give excellent durability. A tip unit used for a liquid applicator includes a ball house having an opening at its distal end and an introduction channel for application liquid in communication with the ball house, wherein the ball house holds therein at least two balls having a leading ball and an adjacent ball next to the leading ball, the balls being serially lined in an axial direction of the tip unit, the leading ball being partly exposed outside from the opening, and the leading ball being softer than the adjacent ball.

Abstract: A liquid dispensing massage device is provided with a liquid container having an externally threaded neck; a dispensing assembly comprising a retaining ring, a seal, a rotatable liquid dispensing outlet, a spring biased sliding plunger defining an axial channel therethrough; a cap; a vibration shell assembly; a vibration assembly in the shell and comprising a battery powered DC motor; and a switch. In a closed position of the device, the switch is locked. In an open position of the device, the switch is unlocked and read to move, and a fluid passage is not blocked by the plunger so that a manual movement of the switch activates the DC motor for generating vibration.

Abstract: The present invention provides a joining member for connecting an ink accommodating member and a ballpoint pen tip provided in a ballpoint pen, the joining member comprising, as a constituent material, a resin comprising a copolymer of polyethylene terephthalate and polyethylene naphthalate. By this means, it is possible to provide a joining member for a ballpoint pen having, in particular, both sufficiently excellent transparency and gas barrier properties.

Abstract: A ballpoint pen tip includes a ball and a ball holder for rotatably holding the ball. The ball includes a ball body and a first carbonaceous film formed so as to cover a surface of the ball body. The first carbonaceous film has carbon atoms and oxygen atoms bonded to some of the carbon atoms. The ratio of carbon atoms bonded to oxygen atoms to the total carbon atoms at a surface of the first carbonaceous film is equal to or greater than 0.1.

Abstract: A container for supporting and dispensing a liquid material is disclosed. The container includes a base defining a cavity for supporting a liquid material and an applicator (e.g., a roller ball, etc.) movably supported at the base for allowing a user to selectively dispense the liquid material from the cavity. The applicator has a first portion and a second portion. The first portion is configured to be exposed to the liquid material when the second portion is exposed to the user. The container also includes a cover coupled to the base for covering the applicator. The cover is selectively movable between a closed position and an open position. The applicator is configured to be manipulated by user in a manner that allows the first portion to become exposed to the user and the second portion to become exposed to the liquid material.

Abstract: A ballpoint pen tip in which ink grooves are formed around an ink guide hole at equally distributed places, the ink guide hole connecting a ball house and a back hole of a holder for holding the writing ball, and the ink grooves radially penetrate through from the ball house side to the front end portion of the back hole. Inward protrusions are formed at positions which are respectively in contact with the rear ends of the ink grooves. If the inner diameter of the ink guide hole is A, the inner diameter of the front end portion of the back hole is B, the diameter of the circle circumscribing the ink grooves is C, and the diameter of the circle inscribing the inward protrusions is D, their relationships are A<B<C, and D<B.

Abstract: A roller receiving device for a packaging system for fluids, the packaging system including a container for receiving a fluid; a roller and a roller receiving device for receiving the roller and for holding the roller on the container, the roller receiving device has a first part for receiving the roller, as well as a second part, different from the first part and held on the first part, the first part forming a first sealing segment for sealing the roller receiving device relative to the container, and the second part forming a first holding segment for forming a locking connection between the roller receiving device and the container.

Abstract: The present invention relates to a roll-on applicator device (11) for distributing a viscous medium on a surface, that comprises a fitment (14) and a distributor ball (13) being placed in the fitment (14) and partially projecting from one of its ends, wherein the fitment (14) comprises a base element (16) and a retaining element (15) that are detachably connected to each other by connection means (25), wherein the base element (16) is provided with support means (21) for supporting the distributor ball (13) and with a tubular member (17) for the connection to a container (12) and wherein the retaining element (15) is designed such that it rotably retains the distributor ball (13) in the fitment (14). The invention further relates to a roll-on dispenser (10) for dispensing a viscous medium with a container (12) for the viscous medium and such a roll-on applicator device (11).

Abstract: A liquid dispenser includes a hollow shank, a dispensing head longitudinally mounted to a first end of the hollow shank, a control device longitudinally mounted to a second end of the hollow shank and a sheath detachably mounted to the first end of the hollow shank for protecting the dispensing head after use. A passage is defined in one end of the hollow shank for communicating with an inner periphery of the hollow shank and the dispensing head such that the liquid contained in the hollow shank can flow into the dispensing head. The control device is provided to selectively close/open the passage for controlling the output quantity of the liquid dispenser.

Abstract: A fluid applicator device having the interconnected components of a container, a base, a shaft, a piston, a collar, a plurality of fluid conduction pathways and an applicator head is presented. The applicator head is rotatably mounted within the collar and slidably held in place by the inner surface of the collar. The inner surface of the collar also has a plurality of fluid conduction pathways cut into it so that a viscous fluid confined within the container may be flow into the fluid conduction pathways and onto the applicator head so that it may be soothingly applied onto a portion of a user's epidermis such as onto the lips of a user. The method of using the applicator device includes the acts of manipulating, obtaining, pressing, removing, returning, rolling, and withdrawing.

Abstract: An improved structure for a make-up pen with a function of vibration massage comprises an accommodating tube body, a discharging set, a cover, a shelter, a battery cover, an elastic element, a battery, a vibration motor, a tumbler switch, and a switch piece. The accommodating tube body comprises an outlet end, which has a discharging hole. The discharging set is disposed at the outlet end of the accommodating tube body; the cover is female-connected to the outlet end of the accommodating tube body one end of the switch piece is disposed at the tumbler switch and the other end is electrically connected to the battery, the switch piece is electrically connected to the vibration motor through the tumbler switch in order to turn on/off the vibration motor for massage and discharging make-up liquid.

Abstract: A refill adaptor for use in ball point pens essentially comprising a main body (10), comprising of a front part (15) and a rear shank portion (20). The front part (15) and said rear shank portion (20) are rigidly coupled together with a ring member (25); and said main body (10) having a capillary tube (40) throughout its length. The said front part (15) is provided with a front housing (35) for holding the refill tip (55) provided with a ball point (65) for smooth writing, said capillary tube being provided with a ink channel, the internal diameter of which is selected to be about 0.8 mm and the outer diameter of said capillary being selected as about 1.8 mm for easy flow of ink from ink reservoir to said ball point (65).

Abstract: A writing implement that includes a body which extends longitudinally along a central axis Z; an ink reservoir, and a roller having a radial outer writing surface being located at one of the ends of the body, which is connected to the ink reservoir and is mounted so that it is able to rotate around the primary axis Y. The ink roller is also mounted so that it is able to pivot around a second axis X, which is perpendicular to the primary axis Y and the secondary axis X being secant to the primary axis Y.

Abstract: A tip unit (1) incorporated in a liquid applicator such as a ball-point pen, the tip unit being capable of an increased rate of liquid discharge with no leaking or clogging problem. To achieve it, the tip unit (1) is accommodated in a tip body (11) having a ball housing (15), a ball (10), a capillary hole (16), and a proximal bore, the ball housing (15) being a passage for allowing liquid to flow therethrough, the ball (10) being rotatively held in the ball housing (15). The ball housing (15) is provided with at least one ink channel (47) adapted to communicate the ball housing (15) with the capillary hole (16) or the proximal bore. The ball housing (15) has a ball resting seat (45) and a side wall (41) that are connected by a connecting surface (71) having a shape of a truncated conical surface with its apex toward the distal end of the tip unit (1).

Abstract: Provided is a tip for a ball point pen that implements more comfortable writing by increasing the outflow amount of ink in writing. A tip for a ball point pen of the present invention includes: a spherical ball; and a tip body having the front end formed in a conical shape, a ball house formed at the end of an ink outflow channel, and a ball support formed by making the front end portion narrower such that the ball is partially exposed and supported in the ball house, in which the external circumferential surface of the front end for forming the ball support of the tip body is formed at a taper angle of 3 to 10°.

Abstract: There is provided a ballpoint pen tip in which a shoulder of a bent portion does not touch a paper surface during writing and bleeding caused by deformation of an inner periphery of the bent portion can be prevented, and an ink refill using thereof. The ballpoint pen tip 20 comprises a first tapered surface 22 formed by tapering an outer periphery at a front end of a holder 21, a connecting surface 23 that is formed at a front end side of the first tapered surface 22 and has an outside angle larger than 180° with respect to the first tapered surface 22, a second tapered surface 24 that is formed at a front end side of the connecting surface 23 and has an outside angle smaller than 180° with respect to the connecting surface 23, and a bent portion 25 in which a front end portion of the second tapered surface 24 is bent inwardly so as to hold a writing ball 35 inserted into a ball house 29.

Abstract: A device for packaging and applying a product including a container holding the product. In an example, the container has a lengthwise axis X and is provided with an applicator element designed to come into contact with a surface to be treated in order to apply the product. The applicator element is in fluid communication with the container when it is in contact with this surface to be treated. A support defines a seating for the applicator element, with the support being at least in a fixed axial position relative to the container. The device further includes a grasping element connected to the support by a resiliently deformable connecting element in a manner such that, in response to a force exerted on the applicator element when the device is being held by the grasping element, the support is able to move relative to the grasping element. In addition, the support is preferably designed to revert to its initial position when the exertion of force ceases.

Abstract: In cosmetic dispensers for fluids, such as for example deodorants or antiperspirants comprising a bottle, a flow regulator in a housing mounted on the bottle and a cap rotatably mounted on the bottle or particularly onto the flow regulator housing, there is a risk that the housing can part from the bottle or be moved out of alignment by fitting or removal of the cap. This problem can be ameliorated or eliminated by employing a plurality of sets of anti-rotation elements at or adjacent to the mouth of the bottle around its periphery, each set comprising a peg and a socket. Preferably, the housing is bifurcated inward of the flow regulator, one wall extending within the bottle and the other wall extending out side the wall, and desirably the bottle wall is of reduced wall thickness in the overlap so that the exterior of the bottle surface and housing surface can be flush at their line of contact.

Abstract: An improved housing for a roll-on has an inward end, an outward end and a side-wall having an interior surface extending from the inward to the outward ends, the outward end defining an aperture sufficiently narrow to retain the roller and permit a segment of the roller to extend outside the housing, and a spider mounted laterally within the housing on the interior surface of the side-wall at or adjacent to the inward end which spider is resiliently biased towards the roller and has a means for providing localised contact with the roller and providing a parallel spacing between the spider and roller. Especially desirably, the roller is a spherical ball.

Abstract: A ball-point pen, wherein a cover member (6) is fitted to a joint member (3) connecting a writing tip (1) rotatably supporting a writing ball (2) at the tip thereof to an ink storage tube. When the cover member (6) is fitted to the joint member (3) along the outer peripheral surface thereof, a part of the cover member does not come within 0.2 mm (within the range of the chain double-dashed line) from around the writing tip. Thus, even if the accuracies of parts and assembly machines are dispersed, a problem with an existing ball-point pen wherein a cover member is brought into contact with a writing tip and the writing tip is damaged in an assembly step can be avoided.

Abstract: Doses of cosmetic fluid dispensed from a roll-on dispenser can fluctuate significantly between successive applications. This problem can be alleviated by perturbing flow within the roll-on housing, such as air flow, by forming flow perturbators on the interior side-wall of the housing. These perturbators can alternatively or additionally comprise lateral beads or notching an interior sealing ring. The dispenser housing preferably also includes a spider normally located between the roller and the bottle interior, and preferably a resilient spider having an facing surface parallel with the roller that can control the depth of liquid film adhering to the roller, which when the roller is a ball means a concave upper face of similar radius of curvature to that of the ball.

Abstract: An aqueous gel ballpoint pen 1 having an ink-storage tube storing an aqueous gel ink containing a pigment as a coloring agent, and a ballpoint pen tip having a ball rotatably held at its leading end and also having an ink flow pore which is formed so that the aqueous gel ink flows from the ink-storage tube to the ball, wherein an ink flow pore diameter r (unit: mm) in the ballpoint pen tip and a storage modulus G? (unit: Pa) at 20° C. of the aqueous gel ink satisfy conditions represented by the following formulas (1) and (2): 0.24?r?0.64??(1), and 1.3?G??16r?3.2??(2).

Abstract: The object of the present invention is to provide a needle type ballpoint pen chip capable of achieving smooth writing. The needle type ballpoint pen chip of the present invention has a very small diameter, the diameters of the ball and the ink flow hole are naturally also small. In order to achieve smooth writing, it is therefore necessary to minimize to the greatest extent possible deviation in the position of the center axis line of the ink flow hole in relation to the center of the ball. To achieve the object, in the needle type ballpoint pen chip of the present invention, a solid cylindrical steel material S with a diameter of approximately 1 mm or less, rather than a pipe material, is used as its base material, and an ink flow hole is formed by performing drill cutting processing on this steel material.

Abstract: The spot cleaning dispenser is a roll-on applicator bottle and a snap on brush attachment. The roll-on applicator bottle is a generally cylindrical container with a roll-on ball applicator at the top. The brush attachment consists of a cylindrical cap and bristles mounted in the top outer surface. The brush attachment freely mounts over the top of the applicator bottle and snaps in a secure position.

Abstract: A ball is from D 700×10?6 m to 2500×10?6 m in diameter and has at least one sign engraved in the surface. The sign is constituted by a system of engraved individual cells situated on the surface of a spherical cap of the ball with a base having a circumference OD in the range from 10×10?6 m to 0.5 n D and the diameter Dc of the circle circumscribing the plan view shape of the cell is in the range from 10×10?6 m to 1/7 D, whereby the depth of the cell is in the range from 5×10?6 m to 2×Dc.

Abstract: An applicator device comprising a storage space for a product to be applied comprising a front portion having a holder for rotatably holding a ball communicating with the storage space through an opening provided between the ball and the holder, wherein at least the front portion comprises plastic material.

Abstract: Disclosed therein is a writing pen with a rotation-preventing bent tip. The writing pen includes a rotation-preventing bent tip and a tip housing which are coupled to each other in a key-locking type to prevent a rotation of the tip or the tip housing by a pressing force generated when a user writes down. The tip 1 has a rotation-preventing protrusion 1b, the tip housing 2 has a rotation-preventing protrusion 2b and a groove 2c to which the protrusion 1b is coupled, and a main housing 3 has a groove 3c to which the protrusion 2b is coupled, so that the tip 1, the tip housing 2 and the main housing 3 are coupled to one another in the key-locking type to thereby provide a mutual interrupting action. So, even though a great force is applied to the writing pen when a user writes down, the tip 1 is not rotated, so that the user can use it freely and comfortably without regard to a used angle of the writing pen.

Abstract: In order that pressure is always applied to a center part of a ball and ink flows smoothly, a ballpoint pen tip according to an exemplary embodiment of the invention includes: a ball that has a diameter of 0.

Abstract: A device for applying a liquid or gel-like product, in particular a cosmetic product, comprising a rotatably supported ball serving as an applicator element, and a storage chamber for the product to be applied on a side of the ball in opposite relationship to an applicator side of the ball for loading the ball on its side in opposite relationship to its applicator side, wherein the storage chamber has a feed opening for the product to be applied. A vent opening is disposed behind the feed opening as viewed from the ball for venting the storage chamber.

Abstract: A fluid applicator device having the interconnected components of a container, a base, a shaft, a piston, a collar, a plurality of fluid conduction pathways and an applicator head is presented. The applicator head is rotatably mounted within the collar and slidably held in place by the inner surface of the collar. The inner surface of the collar also has a plurality of fluid conduction pathways cut into it so that a viscous fluid confined within the container may be flow into the fluid conduction pathways and onto the applicator head so that it may be soothingly applied onto a portion of a user's epidermis such as onto the lips of a user. The method of using the applicator device includes the acts of manipulating, obtaining, pressing, removing, returning, rolling, and withdrawing.

Abstract: An improved structure of applying container including a bottle to receive liquid for applying, the bottle is provided thereon with a connecting seat that has on its top a ball seat for a rollable ball. A displacement means and a stop means are provided between the connecting seat and the ball seat. The displacement means endues the ball seat and the connecting seat with a first kind of relative position after displacement and a second kind of relative position after displacement. When the connecting seat and the ball seat are in the first relative position, the stop means forms a closing state, the liquid for applying in the bottle is prevented from flowing out of the ball, by contact of the rollable ball with skin, a massaging function can be obtained.

Abstract: A water-based ink composition for ballpoint pen which has a colorant, water, a water soluble organic solvent and, as a shear-thinning tackifier, a polysaccharide, wherein the polysaccharide exists in the ink as particles having an average particle size less than 5 ?m, and a water-based ballpoint pen using the composition.

Abstract: A device for packaging and applying a cosmetic product includes a container having a sidewall of which one edge delineates an opening. An annular portion of the sidewall forms a seating designed to house an applicator ball, mounted freely in rotation inside the seating. An inner surface of the seating includes at least one annular sealing zone on which at least one annular portion of the applicator ball is designed to bear in a leaktight manner. A cap is designed to cover an applicator portion of the ball, with the cap incorporating a bearing structure which, in the mounted position of the cap on the container, presses the ball in a leaktight manner against said annular sealing zone.

Abstract: A dispenser head for mounting to a container body has a storage cavity to contain a predetermined volume of agent, wherein the dispenser head comprises an inserting portion adapted for slidably inserting into the container body to communicate with the storage cavity, and a head housing defining a dispensing opening extended from the inserting portion. A ball dispenser is rotatably disposed at the head housing, and a retention seat is provided at the head housing to substantially retain the ball dispenser at a position wherein the ball dispenser is rotatably received in the head housing for contacting with the agent and a portion of the ball dispenser is exposed from the head housing, so that the spherical applying surface of the ball dispenser is adapted for evenly contacting with the agent to be applied to user.

Abstract: A writing instrument is ergonomically adjusted to the position of a user's hands. The writing device has a substantially tubular shaft along a main axis, a terminal part at the rear end of the shaft and a substantially conical tip at the front end of the shaft. Using the terminal part, the tip can be pivoted (inclined) in a controlled manner in relation to the shaft in a plane containing the main axis. Alternatively, an angle of inclination of a cone axis of the tip can be adjusted in relation to the main axis.

Abstract: A pen includes a housing, and an ink reservoir to be received in the housing. The ink reservoir includes a cartridge received in the housing and for receiving ink, a barrel attaching to front of the cartridge, and a nib attached to the barrel, for extending out through the front opening of the housing. The provision of the barrel between the cartridge and the nib allows the ink reservoir to be accommodated into various housings of different lengths and of different structures. The barrel includes a peripheral rib extended from a peripheral swelling for engaging with a spring member which may bias the barrel against the housing.

Abstract: A writing implement, wherein elements forming a reverse flow prevention mechanism are formed in rather simple shapes and assembly process for the reverse flow prevention mechanism is rather simplified. The reverse flow prevention mechanism (19) comprises a valve chamber (54b), an inflow port (55) opened to the ink storage part (16) side of the valve chamber (54b), an outflow port (56) opened to the writing tip (17) side of the valve chamber (54b), a valve element (57) stored in the valve chamber (54b), a restricting body (58) stored in the valve chamber (54b) at a position on the outflow port (56) side of the valve element (57), and a valve seat (54c) formed around the inflow port (55). When the writing tip (17) is faced upward, the inflow port (55) is closed by the valve element (57), and when faced downward, the valve element (57) is allowed to touch the restricting body (58) and does not reach the outflow port (56).

Abstract: An ballpoint pen has: a tip body made of metal having an front edge part and a plurality of inward protrusions; a ball rotatably embraced between the front edge part and the inward protrusions; and a rod part urging the ball forwardly and bringing the ball into close contact with the inner surface of the front edge part, wherein ink outflow gaps are formed each between the adjacent inward protrusions, the rod part is inserted into the central part of the ink outflow gaps, the diameter of a virtual inscribed circle of the central part of the ink outflow gaps is larger than the outside diameter of the rod part, and a minimum dimension of each the ink outflow gap is smaller than the outside diameter of the rod part.

Abstract: A ballpoint pen (1) nib (2) housing the ball (3) and having a stem (6), at least one part of which is inserted coaxially into a hole (5) in the lower end (4f) of a hollow barrel (4) forming part of the ballpoint pen (1). On the outer surface of the at least one part of the stem are formed one or more flutes (7i) that extend parallel to the longitudinal axis (Z—Z) of the stem (6) for a length (L) equal to or greater than the axial length (H) of the hole (5) in such a way that the opposite ends (D, E) of the abovementioned flutes (7i) are outside of it and on opposite sides with respect to it.