Abstract: An ink replenishing apparatus replenishes an ink cartridge, which has an ink absorber made of a porous body or fiber bundle in an ink storage chamber that stores ink, with ink supplied from a replenishing ink cartridge through a relay core. An ink holding force d of capillary tubes of the relay core and an ink holding force D of capillary tubes of the porous body or fiber bundle satisfy the following relation d<D.

Abstract: A water based dye ink composition for a free ink rollerball pen characterized in that white resin particles which are insoluble in an aqueous medium and have an average particle diameter of 100 to 1000 nm and a refractive index of 1.50 or more at 20.degree. C. are added to a water based ink composition for a writing instrument comprising a dye and an aqueous medium to thereby allow the visible color of the ink liquid to be approximate to the visible color of lines written on a sheet of white paper.

Abstract: An ink-oozing plate for a stamp includes a stamp ink-impregnated part, which is comprised of an elastic resin-made stamp material having stamp ink-impregnable open cells. The ink-oozing plate also includes a printing face having a stamp ink-oozing part formed on the surface of the stamp material and a stamp ink-non-oozing part. The stamp ink-non-oozing part has a heat transfer substance-transferred part which is transferred by heat generation and a stamp material-molten part. The stamp material is molten by the heat generation of the heat transfer substance.

Abstract: A non-aqueous ink for a ball point pen is disclosed herein which is accompanied by the feature of the non-aqueous ink excellent in the so-called cap-off performance that a writing performance does not deteriorate even when the pen is allowed to stand, with a cap being removed, and the feature of an aqueous ink that a low writing pressure can be used and blobbing does not occur. This ink comprises an organic solvent having a vapor pressure of 0.2 mmHg (20.degree. C.) or less, a colorant and a coagulant and has a non-Newtonian viscosity index of 0.2 to 0.5 and a viscosity of 200 mPa.cndot.s (25.degree. C., 50 rpm) or less. Furthermore, the ink is characterized by containing a autolyophobic vehicle in which a contact angle to the surface of a material such as stainless steel or bronze having a high surface free energy is in the range of 5 to 40.degree..

Abstract: Provided is an aqueous gel ink-filled ball point pen having less blobbing and capable of drawing stable lines having vivid color and no uneven written intensity. The aqueous gel ink-filled ball point pen has a ball of a diameter of 0.3 to 2.0 mm at a tip point with an aqueous gel ink having a viscosity ratio (a value of (viscosity at 10 rpm)/(viscosity at 50 rpm) measured by means of an E type rotational viscometer) of 1.1 to 4.0 and controlled an ink lay down value according to JIS Standard S6053 to 50 to 200 mg/m.

Abstract: A pseudo-plastic aqueous ink for a ball point pen contains at least a pigment, a dispersant, water, a polar solvent and a thickener and further contains 0.05 to 7% by weight of the silicone base surfactant or 0.05 to 5% by weight of a silicone base surfactant and 0.05 to 5% by weight of sodium dialkyl sulfosuccinate based on the whole amount of the ink.

Abstract: In order to supply a multiple number of inks at a desired geometry, a filling frame has filling ports of substantially vertical passage holes. A stamp piece has a continuous porous structure and is placed on a base plate with the filling framed laid thereover. Each ink is supplied from a corresponding filling port to a separated area and is impregnated into a stamp piece in substantially the same geometry as that of separated area so that each will not mix with the other. Thus, inks are filled keeping the separation, into the stamp piece having a continuous porous structure laid below the filling frame.

Abstract: Provided is an oil base ink composition usable for a stamp ink which has an excellent drying property of the print seal put on a hard-absorbing seal face and a performance for distinctly sealing and in which a sealing performance thereof is not reduced even after leaving the stamp ink pad with a cover opened for a long time, and a marking ink which does not bring about impossibility of writing caused by dry up at the pen tip as well as an ink for a ball point pen and an ink for ink jet which have a good drying property and do not provide the problem of blurring on the ink-adhered face. The above oil base ink composition contains at least one solvent selected from the group consisting of alcohols, ethers and esters each having a vapor pressure of 0.005 to 45 mmHg at 20.degree. C. and a dispersion term .delta..sub.d of 13.0 to 20.0, a polar term .delta..sub.p of 1.0 to 10.0 and a hydrogen bond term .delta..sub.h of 5.0 to 20.

Abstract: A ball point pen filled with an erasable ink which comprises a resin or rubber having a filming temperature of 0.degree. C. or lower or a glass transition temperature of 0.degree. C. or lower, pigment particles and water. The erasability and the writing feeling are improved by further blending the ink with a gelatinizer and a lubricant.

Abstract: A replenishing ink cartridge capable of quickly replenishing a printing cartridge with an ink is provided. The replenishing ink cartridge includes the printing cartridge and a replenishing cartridge for replenishing the printing cartridge with the ink. An ink absorber made of a porous body or fiber bundle is stored in an ink storage chamber of a case of the printing cartridge. An ink supply nozzle to be inserted in the ink absorber is arranged in an ink storage portion of the replenishing cartridge, and a substantially funnel-shaped press member which is to come into contact with the surface of the ink absorber is fitted and mounted on the distal end portion of the ink supply nozzle.

Abstract: Provided is a stable water base ink composition which has a sufficiently high concentration as ink for an ink jet-recording apparatus and writing instruments and prevents the recorded images and the written characters from being blurred or disappearing with water and sweat and which has such an excellent light fastness that the images and the characters do not deteriorate over a long period of time and does not cause a change in physical properties and precipitates. A water base dispersion liquid containing colored resin fine particles is prepared by emulsion-polymerizing a vinyl monomer in the presence of a hydrophobic dye and then diluted with water or a water soluble organic solvent, whereby the water base ink composition is produced.

Abstract: In a barrel cylinder for a writing instrument, a writing element support hole portion or support projection is formed in a deep portion of a distal end port of the barrel cylinder where a writing element extends, the writing element support hole portion or support projection having an inner diameter slightly larger than the outer diameter of the writing element, and an enlarged port portion having an inner diameter larger than the writing element support hole portion or support projection and a gate mark appearing at a location of an inner surface thereof is formed at an inlet port portion of the distal end port of the barrel cylinder which is on the outer side of the writing element support hole portion or support projection.

Abstract: Basic configuration of a cap is as follows. When the end face of an elastic seal cylinder arranged in a cap for a writing instrument is caused to abut against and come into tight contact with the end portion of the mouth piece of a barrel cylinder to hermetically seal a point assembly and the opening portion of an air groove, first, the distal end of the point assembly is hermetically sealed with the bottom of the seal cylinder. The inner opening edge portion of the seal cylinder fits on the conical portion of an ink reservoir or of a point assembly support from an intermediate portion of the conical portion, and is gradually attached to the barrel cylinder while widening the opening portion of the seal cylinder in the radial direction.

Abstract: An applicator includes: a barrel body; a holder having a ball house with an ejecting opening at front end for allowing the liquid from the barrel body to flow out; a ball held in the ball house, as being partially exposed to the outside through the ejecting opening; a spherical evading member disposed on the rear side of the ball and having a smaller diameter than that of the ball; a ball seat disposed in the rear part of the ball house, for receiving the rear side of the evading member; a liquid conduit provided in an approximately central part of the ball seat; longitudinal grooves formed on the inside wall of the liquid conduit; and a pressing means disposed through the liquid conduit for urging the evading member forward.

Abstract: Provided is an erasable ink comprising an emulsion liquid prepared by polymerizing a polymerizable monomer containing a conjugate diene compound in a solvent containing water in the presence of a dye and a surfactant, wherein the polymerizable monomer may contain a vinyl compound as well as a conjugate diene compound, and used are 0.01 to 100 parts by weight of the dye and 0.1 to 30 parts by weight of the surfactant each per 100 parts by weight of the polymerizable monomer.

Abstract: A free ink type writing instrument using an ink containing an organic solvent as a main solvent, wherein a temporary ink reservoir member has a larger critical surface tension than a surface tension of the ink, and an absolute value of a difference between values of solubility parameters of a material constituting the temporary ink reservoir member and a solvent contained in the ink is 1 or more.

Abstract: The invention provides an ink-oozing plate for a stamp with an ink-impregnated part having stamp-ink impregnable open cells, where the printing face of the stamp comprises a stamp ink-oozing part and a stamp ink-non-oozing part, where the stamp ink-non-oozing part is concave and is 0.01 mm or more lower than the ink-oozing part, the stamp ink-non-oozing part being made of a stamp material-molten part and a penetrating molten-mixing part where a heat-fusing substance penetrating part and a stamp material-molten part are present together.

Abstract: Provided is a colored resin fine particle water base dispersion liquid which can be a base material for an ink causing no precipitates and having storage stability. Further provided is a water base ink composition for an ink jet recording apparatus or a water base ink composition for a writing tool capable of providing recorded images or written characters and drawn lines which are clear and neither are blurred nor disappear due to water and sweat and which are so excellent in light fastness that they are not deteriorated over a long period of time, wherein the colored resin fine particle water base dispersion liquid is produced by mixing a water soluble basic dye with a mixed vinyl monomer containing a vinyl monomer having an acid functional group and emulsion-copolymerizing the above mixture.

Abstract: A cap for a writing instrument has a structure obtained such that a cap main body is formed by injection molding using a plastic material so as to have upper and lower open ends, and a cap head formed separately from the cap main body and integrally having a seal cylinder and clip is mounted on the upper open end of the cap main body.

Abstract: An ink for a ball point pen contains at least one or plural kinds of organic solvents, colorants and resins and further contains fine particle silica having a primary average particle diameter of 7 to 40 nm and a specific surface area (BET method) of 50 to 380 m.sup.2 /g. The ink for a ball point pen is prevented from leaking out of the pen tip, is not damaged smooth writing feeling and does not cause clogging at the pen tip.