A writing instrument comprises a hollow body having a first end and a second opposite end along a longitudinal axis (X); a deformable tank inside the hollow body and containing ink; a writing tip disposed at the first end of the hollow body and in fluid communication with the deformable tank; and a deformation device configured to squeeze the deformable tank along the longitudinal axis (X) so as to move forward towards the writing tip the ink contained in the deformable tank.

A is a pen including: an ink reservoir that stores an ink including decorative particles and a pen tip section. The ink reservoir includes a tubular casing member having liquid blocking properties and an ink occlusion material disposed inside the casing member. The casing member has a first opening end and a second opening end. The ink occlusion material includes multiple fibers disposed in the casing member and the multiple fibers respectively having one ends and other ends each disposed at a position corresponding to the first opening end or the second opening end of the casing member.

Provided is a pen including: an ink reservoir that stores an ink including decorative particles and a pen tip section. The ink reservoir includes a tubular casing member having liquid blocking properties and an ink occlusion material disposed inside the casing member. The casing member has a first opening end and a second opening end. The ink occlusion material includes multiple fibers disposed in the casing member and the multiple fibers respectively having one ends and other ends each disposed at a position corresponding to the first opening end or the second opening end of the casing member.

A writing instrument including a main body provided with a writing tip. The writing tip being supplied with ink by a free ink-type reservoir equipped with a pressure regulating device for regulating the pressure within the reservoir. The pressure regulating device includes at least one microfluidic valve.

A writing instrument system including an elongated tip having a firm, felt or plastic nib and a piercing tip. The elongated tip includes a curvature that resembles a shape of a dolphin and the nib is positioned at a first-end of the elongated tip for distributing ink to a surface in a controlled manner. The elongated tip is in fluid communication with the nib. The elongated tip also includes the piercing tip which is able to penetrate an ink cartridge or tube of a pen and be removably affixed to a pen. The piercing tip is in fluid communication with the elongated tip and allows ink to flow from a penetrated ink cartridge or tube through the elongated tip to the nib where it can be applied to a surface.

A writing instrument including a main body provided with a writing tip. The writing tip being supplied with ink by a free ink-type reservoir equipped with a pressure regulating device for regulating the pressure within the reservoir. The pressure regulating device includes at least one microfluidic valve.

A writing instrument system including an elongated tip having a firm, felt or plastic nib and a piercing tip. The elongated tip includes a curvature that resembles a shape of a dolphin and the nib is positioned at a first-end of the elongated tip for distributing ink to a surface in a controlled manner. The elongated tip is in fluid communication with the nib. The elongated tip also includes the piercing tip which is able to penetrate an ink cartridge or tube of a pen and be removably affixed to a pen. The piercing tip is in fluid communication with the elongated tip and allows ink to flow from a penetrated ink cartridge or tube through the elongated tip to the nib where it can be applied to a surface.

A writing instrument with an operating side, with a writing side with a nib, with a tank which can be filled with liquid writing medium, with a piston, which is movable within the tank, and with an operating element arranged on the operating side for axial adjustment of the piston within the tank. The writing instrument is characterized in that the operating element can be brought by a user from a first axial position, namely an idle position, in which it is held axially in position in particular with locking, into a second axial position which differs axially from the idle position, namely an operating position, in which the operating element has a larger distance to the nib in comparison with the idle position and in which the operating element can be gripped by the user and moved for the axial adjustment of the piston.

The method of present disclosure relates to a writing apparatus for dispensing writing fluid on a writing surface. The writing apparatus comprises a sensor, containers for storing one or more mixing elements, a processor and a memory communicatively coupled to the processor. The writing apparatus compares the characteristics with predefined characteristics to determine quality of the writing surface. Further, the writing apparatus also determines a quality of the writing fluid suited for the writing surface. Based on the quality of the writing surface and the writing fluid, the writing apparatus modifies at least one property of the writing fluid before dispensing the writing fluid on the writing surface. For modifying the property, the one or more mixing elements are added into the writing fluid. Once the writing fluid is modified, the writing apparatus dispense the writing fluid on the writing surface.

A liquid applying tool which can create pressurizing action with a simple structure and without any labor at the time of using the liquid applying tool, and allows liquid to be smoothly fed to a tip end of a liquid applicator member with the assistance of the pressurizing action.