A 3D pen capable of feeding out drawing materials of different colors simultaneously, and a nozzle thereof having a heater tip, a first installation seat and a second installation seat; the heater tip and the first installation seat are fixedly connected with each other; the first installation seat and the second installation seat are fixedly connected with each other; an outer wall of the heater tip has a recessed portion provided with a winding portion for installation of a heating device; a right end of the heater tip is provided with a third insertion portion; the third insertion portion is connected with the first installation seat; at least three feeding channels independent of one another are provided inside the heater tip; two ends of each of the feeding channels extend to a left end surface and a right end surface of the heater tip respectively.

Presented is a smart multi-color writing tool in the form of a pen having a color capture and replication capability, and is equipped with a novel ink dispensing, mixing, and delivery system. The multi color writing tool is configured to capture/scan any colors from variety of objects or images, store the captured colors from the objects or images within a local memory unit configured within the tool or transmit the same to a remotely located computing device, and make use of the captured colors for writing on, marking, or coloring objects, paper, and/or other suitable surfaces.

A device for reproducing a color on demand. The device includes a body including a tip and a scanner. The body also includes a control unit, a plurality of ink reservoirs, an ink supply system, a mixing tank and a sensor. The control unit communicates with the scanner and ink supply system to reproduce a desired color that has been scanned.

A device for reproducing a color on demand. The device includes a body including a tip and a scanner. The body also includes a control unit, a plurality of ink reservoirs, an ink supply system, a mixing tank and a sensor. The control unit communicates with the scanner and ink supply system to reproduce a desired color that has been scanned.

A magnetic pen can be used in drawing arbitrary characters, figures, and symbols on a magnetic panel for a display by applying a magnetic field. The magnetic pen includes a body that includes an end portion. A holder made of a magnetic material is attached to the end portion and an internal space is formed in the holder. The holder includes a bottom portion formed with an opening and a side portion connected to the bottom portion. A magnet is arranged in the internal space of the holder. The magnet is received in a space formed by the bottom portion and the side portion.

A magnetic pen can be used in drawing arbitrary characters, figures, and symbols on a magnetic panel for a display by applying a magnetic field. The magnetic pen includes a body that includes an end portion. A holder made of a magnetic material is attached to the end portion and an internal space is formed in the holder. The holder includes a bottom portion formed with an opening and a side portion connected to the bottom portion. A magnet is arranged in the internal space of the holder. The magnet is received in a space formed by the bottom portion and the side portion.

This printing device is provided with a first ink container that contains a first ink; a second ink container that contains a second ink; temperature adjusting units that adjust the temperature of the first ink contained in the first ink container and/or the temperature of the second ink contained in the second ink container; a nozzle that sprays the inks; and a control unit that controls the first temperature adjusting unit and the second temperature adjusting unit.

A pen holding device configured to hold an electronic pen which has a first core that is elongated and is replaceable. The pen holding device includes a casing having an electronic pen holder that is configured to hold the electronic pen in an erect state or a laid state, and at least one refill core holder which is provided inside the casing and is configured to grasp a second core, which is a refill core for the electronic pen, in a direction different from a longitudinal direction of the electronic pen when the electronic pen is held in the erect state.

A pen holding device configured to hold an electronic pen which has a first core that is elongated and is replaceable. The pen holding device includes a casing having an electronic pen holder that is configured to hold the electronic pen in an erect state or a laid state, and at least one refill core holder which is provided inside the casing and is configured to grasp a second core, which is a refill core for the electronic pen, in a direction different from a longitudinal direction of the electronic pen when the electronic pen is held in the erect state.

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