Provided is a pen including: an ink reservoir configured to store an ink containing decorative particles; and a pen tip configured to apply the ink to an ink coating target. The pen tip includes: a proximal end to which the ink is supplied from the ink reservoir; a distal end opposite to the proximal end and configured to contact the ink coating target; and a groove opening on the outer circumferential surface of the pen tip and extending from the proximal end to the distal end.

A writing instrument 2 includes a pen tip mechanism 20, an ink tank 40, an ink induction mechanism 50, and a regulator mechanism 60. The ink tank 40 includes first and second ink tanks 40A and 40B. The pen tip mechanism 20 includes first and second pen tips 20A and 20B. The ink induction mechanism 50 includes first and second induction cores 50A and 50B. A regulator flow path set around the first induction core 50A and the second induction core 50B is partitioned into first and second regulator flow paths by the regulator mechanism 60. The first and second regulator flow paths are temporary accommodation spaces of inks and circulation spaces for sending air from the induction cores 50A and 50B to the ink tanks 40A and 40B.

A writing instrument 2 includes a pen tip mechanism 20, an ink tank 40, an ink induction mechanism 50, and a regulator mechanism 60. The ink tank 40 includes first and second ink tanks 40A and 40B. The pen tip mechanism 20 includes first and second pen tips 20A and 20B. The ink induction mechanism 50 includes first and second induction cores 50A and 50B. A regulator flow path set around the first induction core 50A and the second induction core 50B is partitioned into first and second regulator flow paths by the regulator mechanism 60. The first and second regulator flow paths are temporary accommodation spaces of inks and circulation spaces for sending air from the induction cores 50A and 50B to the ink tanks 40A and 40B.

A marking instrument having a plurality of removable writing nibs serially aligned so that an operator can remove a spent or fluid-affected writing nib and, thereby, access a fresh writing tip.

A marking instrument having a plurality of removable writing nibs serially aligned so that an operator can remove a spent or fluid-affected writing nib and, thereby, access a fresh writing tip.

A writing instrument may include an upper barrel rotatably connected to a lower barrel. Writing fluid reservoirs may be housed in the upper barrel. A writing tip secured to the lower barrel may be in selective fluid communication with the writing fluid reservoirs. The upper barrel may be rotatable relative to the lower barrel of the writing instrument.

The present invention relates to an ink composition and a writing instrument. The ink composition comprises 10 to 70 wt % of a metallic pigment, 10 to 30 wt % of a resin, 0 to 20 wt % of a colorant, 0 to 20 wt % of an auxiliary agent and a solvent as the remainder; the solvent is a main solvent or a mixture of the main solvent and an auxiliary solvent; the resin includes a film-forming resin and a thickening resin; the present invention uses a low-level monohydric alcohol solvent as the main solvent, a polyvinyl acetal resin as the film-forming resin, and further includes the auxiliary agent, the metallic pigment or the colorants, so the ink composition with such good characteristics as being environmental friendly, drying quickly, being written smoothly and having strong compatibility to general writing surfaces is produced.

A knock type writing tool is provided, in which an appropriate amount of air can be taken in depending on an amount of a thermochromic ink discharged from a pen tip, so that the thermochromic ink can be smoothly discharged from the pen tip, and in which a writing body can rotate surely in conjunction with a rotation of a rotating member. An air hole 63a and a plurality of projection pieces 63b are provided at a rear end portion of a writing body 6. A front surface of a projection and retraction rotating member 7 is provided with a plurality of abutment parts 73, on which respective rear ends of the plurality of projection pieces 63b are to abut, and with a plurality of protrusion parts 72, each of which is formed between the plurality of abutment parts 73 and protruded more forward than the plurality of abutment parts 73. The protrusion parts 72 are respectively inserted in gaps 63c between the projection pieces 63b. An axial length of each projection piece 63b is longer than an axial length of each protrusion part 72, so that a portion of the gap 63c is left more forward than a front end of each protrusion part 72.

An applicator of the invention includes a main body, a storage chamber disposed in the main body, an application body disposed at an end of the main body to allow application of the liquid stored in the storage chamber, a partition for partitioning between the storage chamber side and the application body side, the partition including a flow passage to supply the liquid in the storage chamber to the application body, an axially movable air communication pipe having an air port open to the storage chamber, which abuts on the partition to close the flow passage, and communicates the storage chamber with the atmosphere while having the flow passage closed, and a spring member for urging the air communication pipe to abut on the partition, and separating the air communication pipe from the partition through vibration of the main body to allow guiding of the liquid in the storage chamber.

An applicator of the invention includes a main body, a storage chamber disposed in the main body, an application body disposed at an end of the main body to allow application of the liquid stored in the storage chamber, a partition for partitioning between the storage chamber side and the application body side, the partition including a flow passage to supply the liquid in the storage chamber to the application body, an axially movable air communication pipe having an air port open to the storage chamber, which abuts on the partition to close the flow passage, and communicates the storage chamber with the atmosphere while having the flow passage closed, and a spring member for urging the air communication pipe to abut on the partition, and separating the air communication pipe from the partition through vibration of the main body to allow guiding of the liquid in the storage chamber.