A nib for a valve-free free ink writing felt pen including a first end configured to deliver ink to a writing support and second end, opposite the first end, configured to be inserted in a nib receiving part of the valve-free free ink writing felt pen, the first end and the second end defining an axial direction of the nib, the nib having an external surface configured to cooperate with an internal surface of the nib receiving part, the external surface being configured to allow intake of air from the outside of a free ink tank, the valve-free free ink writing felt pen into the free ink tank and avoid ink leakage outside the free ink tank when cooperating with the internal surface of the nib receiving part. A valve-free free ink writing felt pen including a nib.

A nib for a valve-free free ink writing felt pen including a first end configured to deliver ink to a writing support and second end, opposite the first end, configured to be inserted in a nib receiving part of the valve-free free ink writing felt pen, the first end and the second end defining an axial direction of the nib, the nib including a main body made of porous hydrophilic material and including one or more insert made of porous hydrophobic material, the one or more insert being configured to allow intake of air from the outside of a free ink tank of the valve-free free ink writing felt pen into the free ink tank and avoid ink leakage outside the free ink tank. A valve-free free ink writing felt pen including a nib.

A pen includes: an ink reservoir configured to store an ink; and a pen tip section including an ink application part configured to apply the ink to an ink application object. The ink application part of the pen tip section includes: a rigid tip made of a rigid material and having a hemispherical outer surface, an inner surface facing toward the ink reservoir, and a penetration part penetrating from the inner surface side to the outer surface side of the rigid tip; and at least one foam body filled in the penetration part at least on the side of the penetration part close to the outer surface side of the rigid tip, and provided with at least one air bubble formed to communicate from the outer surface side of the foam body to the inner surface side of the foam body.

A retractable marker assembly includes a tube that has a tapered end such that the tube has a conical shape. An ink cartridge is insertable into the tube and the ink cartridge contains a fluid ink. The ink cartridge is slidable between an extended position or a retracted position. An applicator is fluidly coupled to the ink cartridge to absorb the fluid ink contained in the ink cartridge for marking a surface. A cap is removably attached to the tube and a button slidably extends through the cap. The button engages the ink cartridge and the ink cartridge is positioned in the extended position exposed when the button is depressed having the applicator being exposed. The ink cartridge is positioned in the retracted position when the button is not depressed having the applicator being withdrawn into the tube.

A retractable marker assembly includes a tube that has a tapered end such that the tube has a conical shape. An ink cartridge is insertable into the tube and the ink cartridge contains a fluid ink. The ink cartridge is slidable between an extended position or a retracted position. An applicator is fluidly coupled to the ink cartridge to absorb the fluid ink contained in the ink cartridge for marking a surface. A cap is removably attached to the tube and a button slidably extends through the cap. The button engages the ink cartridge and the ink cartridge is positioned in the extended position exposed when the button is depressed having the applicator being exposed. The ink cartridge is positioned in the retracted position when the button is not depressed having the applicator being withdrawn into the tube.

Provided is a fiber-bundled part for writing instruments having excellent strength and durability, as well as a pen tip and a writing instrument using the fiber-bundled part, which can be suitably used for pen tips, ink feed cores and relay cores of writing instruments such as marking pens and felt-tip pens. The fiber-bundled part for writing instruments of the present disclosure is used for the ink feed core leading to the pen tip or a writing pen core, and comprises a multifilament of long fibers having different melting points, and the multifilament at least contain crimped fibers.

Provided is a fiber-bundled part for writing instruments having excellent strength and durability, as well as a pen tip and a writing instrument using the fiber-bundled part, which can be suitably used for pen tips, ink feed cores and relay cores of writing instruments such as marking pens and felt-tip pens. The fiber-bundled part for writing instruments of the present disclosure is used for the ink feed core leading to the pen tip or a writing pen core, and comprises a multifilament of long fibers having different melting points, and the multifilament at least contain crimped fibers.

Provided are a child and environmentally friendly aqueous based heat transfer disperse dye ink compositions suitable for placing an image on an object and processes of their use. The compositions may include a heat transfer disperse dye having a particle size less than 350 nm, and wherein the ink composition may have a viscosity less than 10 cps at room temperature. A process that uses the ink compositions optionally include marking an intermediate substrate, drying the image, optionally heating the intermediate substrate, optionally placing the inked intermediate substrate in contact with a dye receptive surface of a receptive object, and optionally transferring the image to the receptive object by application of sufficient heat and pressure.

Provided are a child and environmentally friendly aqueous based heat transfer disperse dye ink compositions suitable for placing an image on an object and processes of their use. The compositions may include a heat transfer disperse dye having a particle size less than 350 nm, and wherein the ink composition may have a viscosity less than 10 cps at room temperature. A process that uses the ink compositions optionally include marking an intermediate substrate, drying the image, optionally heating the intermediate substrate, optionally placing the inked intermediate substrate in contact with a dye receptive surface of a receptive object, and optionally transferring the image to the receptive object by application of sufficient heat and pressure.

Provided are a child and environmentally friendly aqueous based heat transfer disperse dye ink compositions suitable for placing an image on an object and processes of their use. The compositions may include a heat transfer disperse dye and a nonsublimable dye or pigment having a hue representative of the hue of the disperse dye when heat transferred onto a substrate, with either or both of the dyes or pigments having a particle size less than 350 nm, and wherein the ink composition may have a viscosity less than 10 cps at room temperature. A process that uses the ink compositions optionally include marking an intermediate substrate, drying the image, optionally heating the intermediate substrate, optionally placing the inked intermediate substrate in contact with a dye receptive surface of a receptive object, and optionally transferring the image to the receptive object by application of sufficient heat and pressure.