Dry erase ink formulations containing a resin, a pre-assembled colorant, and a solvent, wherein the dry erase ink formulation has a surface tension of at least 25 dynes per centimeter, and writing instruments including a dry erase ink formulation are provided herein.

The invention relates to a pen for cosmetic, writing, drawing, sketching and/or marking purposes, having an inner part and an outer part, wherein the inner part is accommodated in the outer part at least in sections and is fastened therein. According to the invention, it is provided that a fastening device between the inner part and the outer part serves to fasten the inner part to the outer part, which fastening device is elastically deformable and is deformed in the installed state against its elastic restoring force, wherein it is supported on one side on the inner part and on the other side on the outer part by means of the elastic restoring force to fasten the inner part to the outer part.

This disclosure relates to a printing device for printing or dispensing a curable printing composition which is capable of changing color in response to the application of a magnetic field in the non-cured state. The printing device may be a handheld device such as a portable pen. The present disclosure further relates to curable compositions, cartridges and methods which may be used in combination with the aforementioned printing devices or in other applications.

This disclosure relates to a printing device for printing or dispensing a curable printing composition which is capable of changing color in response to the application of a magnetic field in the non-cured state. The printing device may be a handheld device such as a portable pen. The present disclosure further relates to curable compositions, cartridges and methods which may be used in combination with the aforementioned printing devices or in other applications.

A writing and underline-drawing implement includes: an elongate hollow body having an open top portion and a closed bottom portion; an elongate core received in the elongate hollow body, the elongate core having the tip portion; a cap having a tip hole partially formed in a top portion thereof, the cap being hollow and having an open bottom portion to partially receive and/or passed through by the elongate core, the cap being configured to at least partially move along a length of the elongate hollow body; and rotatable guide wheels coupled to the cap at an upper portion of the cap, the cap being disposed between the guide wheels.

An ink reservoir unit for a writing instruments using an ink reservoir tube with which low contamination can be achieved considering environmental problems; and a writing instruments using the same. The ink reservoir tube is composed of a composite material in which a raw material is layered on a paper substrate having paper as a substrate. One end section of the ink reservoir tube is coupled to a connection part formed on a writing member or a relay member that holds the writing member to constitute the ink reservoir unit for a writing instrument. In one preferred aspect, a locking device using a male thread formed on an outer peripheral surface is provided to the connection part to be connected to the ink reservoir tube, and the ink reservoir tube is coupled to the relay member that holds the writing member by the locking device.

Applicator (3) for applying a cosmetic or care product, which extends along a longitudinal axis (X) and has: —an applicator member (6), —a holder (5) for the applicator member, and a handle (10) that defines a gripping surface allowing the user to hold the applicator during the application of the product, the handle being deformable with shape memory at least along a part of its length.

In order to allow a worker to accurately and repeatedly mark an original plan on a working surface, the present disclosure provides a nonrestrictive drive-type marking system comprising a nonrestrictive drive-type marking device, the nonrestrictive drive-type marking system including an input unit configured to receive data of content to be marked; a marking unit configured to mark the content corresponding to the data on a working surface; a driving unit configured to allow at least a part of the nonrestrictive drive-type marking device comprising the marking unit to nonrestrictively move on the working surface; a position detecting unit configured to sense position information of the nonrestrictive drive-type marking device; and a control unit electrically connected to the input unit, the marking unit, the driving unit, and the position detecting unit, and configured to calculate a current position of the at least the part of the nonrestrictive drive-type marking device comprising the marking unit by comparing the position information with the data, to compare the current position with the data, and if the current position does not match with the data and a degree of mismatch thereof is within a preset range, to move at least a part of the marking unit, and to control the nonrestrictive drive-type marking device to mark the content corresponding to the data on the working surface while the nonrestrictive drive-type marking device moves.

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.

A writing instrument 2 includes a pen tip mechanism 20, an ink tank 40, an ink induction mechanism 50, and a regulator mechanism 60. The ink tank 40 includes first and second ink tanks 40A and 40B. The pen tip mechanism 20 includes first and second pen tips 20A and 20B. The ink induction mechanism 50 includes first and second induction cores 50A and 50B. A regulator flow path set around the first induction core 50A and the second induction core 50B is partitioned into first and second regulator flow paths by the regulator mechanism 60. The first and second regulator flow paths are temporary accommodation spaces of inks and circulation spaces for sending air from the induction cores 50A and 50B to the ink tanks 40A and 40B.