In a writing tool 1, a front shaft 5 is detachably provided on a rear shaft 6 containing an ink absorbent body 7. A filling part 51 is provided on an outside surface of a rear part of the front shaft 5. The filling part 51 detachably fits to a fitted part 61 formed on an inside surface of an opening part of the rear shaft 6. The filling part 51 has an outward-facing pressure contact part 53 and a radially penetrating slit 54. The fitted part 61 has an inward-facing pressure contact part 63. The front shaft 5 and the rear shaft 6 are brought into a pressure contact with each other when the front shaft 5 and the rear shaft 6 are fitted to each other.

The invention concerns a device for manual application of a liquid, particularly for painting, marking, drawing, writing and/or applying make-up to keratinous surfaces, in which the device has a capillary store for the liquid. According to the invention a device for measuring the filling level of the capillary store is provided.

Provided is a printer including a first ink tank, a second ink tank, a print head, a first photoelectric conversion device provided at a side surface of the first ink tank, and detecting light incident from the first ink tank, a second photoelectric conversion device provided at a side surface of the second ink tank, and detecting light incident from the second ink tank, and a processing unit detecting an amount of ink in the first ink tank based on an output of the first photoelectric conversion device and detecting an amount of ink in the second ink tank based on an output of the second photoelectric conversion device.

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 invention provides a system for refilling of used markers. The system comprises at least one round plate (1) mounted on a supporting platform, at least one ink reservoir (2) adapted to store ink and positioned at the center of the round plate (1) and one entry hole (3) on the ink reservoir (2) adapted to hold a nib of a marker (6). The round plate (1) of the system is mounted on a motor adapted to rotate the round plate (1) at high speed in a circular motion to dispense ink from the ink reservoir (2) by centrifugal force via the entry hole (3) to refill the marker (6) through the nib.

A double-head marker pen includes a first penholder, a second penholder and a connecting tube; one end of the first penholder is formed with a first pen head, and one end of the second penholder is formed with a second pen head; and an end of the first penholder away from the first pen head is detachably connected with an end of the second penholder away from the second pen head by the connecting tube.

A marker-making kit for assembling a marking device having a user-determined mixture of marking solution is provided. The kit includes a base unit coupled to a marker positioning mechanism and a press mechanism. A mixing tube holder secures a mixing tube used for collecting a desired amount of one or more marker fluids. A mixed marker solution is combined, including any number of different colors of marker fluid, and used to saturate a marker reservoir. The saturated reservoir may then be transferred to a maker barrel positioned near the press mechanism. By applying an amount of force with a marker compression arm, a completed marker is secured, enclosing the marker reservoir inside a marker barrel.

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.

A marker comprising: a body comprising a marker fluid absorber, a marker fluid reservoir, and a flow pipe fluidly coupling the reservoir to the absorber, and a marking core extending from the absorber to outside the body.

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.