Abstract: A delivery tip for flowable materials with bristles or fibers extending therefrom. The tip is a cannula with a tapered outlet and features a bristle or fiber bundle with a binding restriction member that interfaces with the cannula at some point within the cannula but has a smaller cross-sectional area for flow passage than the cannula at that point. The bristle or fiber bundle extends out of the tapered outlet. The delivery tip may connect to a material reservoir with flowable material. When positive pressure is applied to the reservoir, material then will flow through the cannula, around the restriction member, into the bristles or fibers and out the outlet for distribution to a desired surface.

Abstract: The present invention provides a direct liquid-writing instrument without ink leakage from the pen-tip even after a long period of use. Specifically, it provides a direct liquid-writing instrument having an ink-retaining part in a bellows-like shape, in which at least the ink-retaining part in a bellows-like shape is made of: 20 to 95% by mass of (A) a polyamide-based resin; and 80 to 5% by mass of (B) at least one resin selected from a styrene-based resin, an olefin-based resin, and a polyphenylene ether resin.

Abstract: A writing implement for preventing ink from leaking out from a front end of a tip by absorbing much of a change in pressure inside an ink tank, the implement being a direct liquid type writing implement having an ink tank and an ink flowing portion connecting the ink tank and a writing end, a temporary ink reserve part for temporarily holding ink and an air supplying portion for supplying air to the temporary ink reserve part, the temporary ink reserve part being constituted by a temporary ink reserve groove and an ink guide groove, an ink introducing groove at a vicinity of the ink tank constituting a portion of the ink guide groove, a distance from the writing end to an end portion of the temporary ink reserve groove on its ink tank side being larger than a distance from the writing end to the ink introducing groove.

Abstract: A free-ink type writing instrument having a temporary ink collector having a sectionally combed configuration, between an ink tank chamber and an writing tip and inside the front barrel, wherein all or part of the gaps between neighboring combed teeth for retaining ink in the temporary ink collector are set equal to 0.15 mm or smaller, and the ink tank is charged with an ink having a surface tension equal to 30 mN/m or lower at 25° C.

Abstract: A free-ink collector type writing implement includes ink (12) having a low viscosity of 2 to 100 mPa S, a collector (6) having both an internal pressure regulating function and an ink guiding feed, and a thin reservoir (1) having an ink holding capability connected with the ink guiding feed is accommodated in an ink tank (7), wherein the volumes of the reservoir (1), the ink tank (7) and the collector (6) are set to have an optimum relationship. Furthermore, the ink tank (7) is separated into two parts by a ring (13).

Abstract: A direct-feed type writing implement includes: a point assembly having a writing point at the tip thereof; an ink tank directly storing a relatively low viscosity ink having a viscosity of 2 to 100 mPa·S at room temperature; an ink collector for adjusting the internal pressure in the ink tank by utilizing capillarity; a feeder including a center core, for feeding ink from the ink tank to the writing point; a duct pipe connecting the ink collector and the ink tank; and a duct pipe ink storage portion provided for the duct pipe. In another embodiment, ink is supplied to the center core as the ink feeder only through the duct pipe.

Abstract: A direct-feed type writing implement includes: a point assembly having a writing point at the tip thereof; an ink tank directly storing a relatively low viscosity ink having a viscosity of 2 to 100 mPa.S at room temperature; an ink collector made up of a multiple number of vanes for adjusting the internal pressure of the ink tank by utilizing capillarity; a feeder including a center core, for feeding ink from the ink tank to the writing point; an ink absorber connected to the center core as the ink feeder; and a duct pipe connecting the ink collector and the ink tank; and preferably, ink is supplied to the center core as the ink feeder only through the ink absorber and the duct pipe.

Abstract: A feeding duct for writing liquid in fountain pen nibs and method of producing same, wherein the duct includes a substantially cylindrical element having multiple circumferential grooves creating respective fins, of a support for a nib and a connecting mans to an ink reservoir the feeding duct is produced in two distinct portions disposed symmetrically in relation to a longitudinal plane each portion is provided with a longitudinal recess extending along the entire length of the portion, apart from the front end thereof, and is combined with recess of the other portion to form a groove when the two portions are secured one to another.

Abstract: A writing unit for a cartridge fountain pen comprising an ink feeder 3, a writing nib 1 mounted to the forward end portion of the ink feeder, and a gripping piece 2 enclosing the rearward end portion of the ink feeder. A capillary gap 3a extends along the longitudinal length of the rearward end portion of the ink feeder and to the writing nib, and an air channel 3c of generally triangular outline overlies the gap 3a. To compensate for an expansion of air in the writing unit caused by temperature fluctuations, a plurality of lamellar collecting chambers 3e are formed in the ink feeder along each side of the capillary gap, with each collecting chamber communicating with one of the two upper corners of the triangular air channel via an overflow capillary 3d. Also, to avoid a dripping or leakage of ink after tapping the cartridge, there is provided a fluid control valve which communicates with one of the two upper corners of the triangular air channel at a location adjacent the writing nib.

Abstract: A supply system is provided for a device that operates with capillary forces and is used to apply liquids. The system includes receptacles that accommodate the liquid and are closed off relative to the atmosphere. Also provided is an application element that communicates with the receptacles via a feed mechanism and serves for the application of the liquid, for which purpose the application element has a discharge. Each of the receptacles is provided with an inlet and an outlet, with the receptacles being interconnected in the manner of a series connection by having the outlet of one receptacle communicate with the inlet of another receptacle. The capillarity of the inlets and outlets is greater than the capillarity of the receptacles in the vicinity of the inlets and outlets thereof, and is less than the capillarity of the discharge of the application element.

Abstract: This invention relates to a temporary ink storage member for temporarily storing ink in accordance with pressure changes in an ink tank. The temporary ink storage member comprises a reduced thickness portion forming an ink storage portion and having a comb-toothed longitudinal sectional shape and slit-like ink grooves communicating with the ink storage portion, wherein a plurality of ink grooves are formed symmetrically with one another in cross-section. The present invention relates also to a writing instrument using the temporary ink storage member.

Abstract: A leakproof fountain pen with a ballbearing tip includes an upper casing threadedly engaged to an ink flow guide. An ink reservoir has an open end received by an annular base of the ink flow guide. The upper casing combines with the ink flow guide to form a chamber for collecting ink which may flow from the ink reservoir. The ink flow guide further comprises an axial vent hole communicated with the atmosphere; an axial ink hole to serve as a path for ink flowing to and from the chamber and the ink reservoir; and an axial control hole having a flow portion with a bigger diameter. A gravity post is movably disposed inside the flow portion and can block the passage of ink between the ink reservoir and the control hole. A plug unit acts as a support for the gravity post. A first end of the ink flow guide is substantially V-shaped with the lowest point at the opening of the ink hole to direct the collected ink from the chamber towards the ink hole when the pen is held upright.

Abstract: An ink feed for a fountain pen has a main body provided with radial ink holding chambers, the rear end of which can be connected with the ink reservoir of a fountain pen, and which has on the nib support side an axially running groove to receive an inset, between which inset and the base of the groove, an air channel and at least one capillary ink feed channel are formed. The front end of the ink feed channel opens into an ink reserve space constructed between the main body and the inset, which space is connected via a capillary ink exit slit between the front end region of the inset and the main body, with the nib support surface. The ink exit slit extends from the middle of the groove to its two sides and at least with partial sections to the rear.

Abstract: A writing instrument of an extremely simple structure in which stored ink previously extruded upon increase of the internal pressure of an ink chamber is subsequently sucked up by decrease of the internal pressure of the ink chamber and returned to the ink chamber, thereby preventing the outputting of ink drops in a downward orientation of pen, particularly when a large amount of ink is stored.

Abstract: 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.