Embodiments of the disclosure can include writing instruments, nibs for writing instruments, and methods of making the same. In one embodiment, the writing instrument includes a reservoir; an ink solution comprising a pigment, the ink solution being housed within the reservoir; a nib disposed at an end of the reservoir and plugging an opening of the reservoir such that the reservoir is closed, wherein a tip of the nib extends outside of the reservoir; and a filament extending within the reservoir, the filament being in fluid communication with a portion of the nib within the reservoir, such that the ink solution travels along the filament and through the nib, by capillary action, wherein the nib and filament are formed such that no more than 50 percent of the pigment present in the nib and filament flow into the reservoir outside of the nib and filament when the writing instrument is stored with the nib up for a period of one day.

Embodiments of the disclosure can include writing instruments, nibs for writing instruments, and methods of making the same. In one embodiment, the writing instrument includes a reservoir; an ink solution comprising a pigment, the ink solution being housed within the reservoir; a nib disposed at an end of the reservoir and plugging an opening of the reservoir such that the reservoir is closed, wherein a tip of the nib extends outside of the reservoir; and a filament extending within the reservoir, the filament being in fluid communication with a portion of the nib within the reservoir, such that the ink solution travels along the filament and through the nib, by capillary action, wherein the nib and filament are formed such that no more than 50 percent of the pigment present in the nib and filament flow into the reservoir outside of the nib and filament when the writing instrument is stored with the nib up for a period of one day.

A single-use surgical marking pen assembly is disclosed. The assembly comprises a housing configured to at least partially receive an elongated member having a first end and a second end. The first end is attached to an ink cartridge terminating in an ink tip while the second end is engaged with a stopper. A plunger end is configured to selectively retract the ink tip into the interior cavity of the housing via the elongated member. A circumferential band is configured to releasably engage with a cap configured to conceal the ink tip when engaged with the circumferential band. A stoppage is positioned on an interior surface of the housing to restrict the movement of the stopper, the restricted movement of the stopper prohibits the extension of the ink tip.

The present invention provides devices, systems, and methods for refilling a refillable fluid applicator, such as but not limited to a refillable dry erase marker. The devices, systems, and methods of the present invention advantageously allow the fluid applicator to be refilled quickly, easily, and inexpensively, and provide the benefit of significantly reducing the quantity of solid plastic waste associated with conventional disposable dry erase markers and other fluid applicators.

The present invention provides devices, systems, and methods for refilling a refillable fluid applicator, such as but not limited to a refillable dry erase marker. The devices, systems, and methods of the present invention advantageously allow the fluid applicator to be refilled quickly, easily, and inexpensively, and provide the benefit of significantly reducing the quantity of solid plastic waste associated with conventional disposable dry erase markers and other fluid applicators.

An applicator includes a partition wall for partitioning between a storage chamber and a reservoir chamber, an application body that allows application of a liquid stored in the storage chamber, a relay member that transfers the liquid stored in the storage chamber passing through the partition wall toward the application body, a gas-liquid exchanging section formed at the partition wall for air-liquid exchanging with the liquid stored in the storage chamber, an occluding body that is disposed in the reservoir chamber, and in contact with the relay member for occluding the liquid, and a movement prevention section disposed at the relay member and/or the occluding body for preventing movement of the liquid held in the occluding body to the relay member.

An applicator includes a partition wall for partitioning between a storage chamber and a reservoir chamber, an application body that allows application of a liquid stored in the storage chamber, a relay member that transfers the liquid stored in the storage chamber passing through the partition wall toward the application body, a gas-liquid exchanging section formed at the partition wall for air-liquid exchanging with the liquid stored in the storage chamber, an occluding body that is disposed in the reservoir chamber, and in contact with the relay member for occluding the liquid, and a movement prevention section disposed at the relay member and/or the occluding body for preventing movement of the liquid held in the occluding body to the relay member.

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.

Provided is an oil-based ink composition for writing instruments which has good properties for writing on writing surfaces of various materials and which has improved friction resistance against friction from retracing of letters that have already been written and against stronger friction forces.

Provided is an oil-based ink composition for writing instruments which has good properties for writing on writing surfaces of various materials and which has improved friction resistance against friction from retracing of letters that have already been written and against stronger friction forces.