A pencil sharpener may include a body having a first end and a second end aligned along a main axis of the body, the body having a pencil receptacle disposed at the first end and configured to releasably attach to a pencil such that a longitudinal axis of the pencil is parallel to the main axis of the body of the pencil sharpener, the body further having a bore formed therein between the first end and the second end, the bore having a bore axis oblique to the main axis; and a sharpener blade disposed adjacent the bore such that a portion of a pencil is insertable into the bore of the body to be sharpened by the sharpener blade.

An instrument includes a body, at least two modules, each separate from the one or other modules, including an operative portion and being movable relative to the body and, for each module, a mechanism for guiding the translation and rotation of the module along the body, the module being movable relative to the body, successively in translation parallel to a first axis and in rotation about a second axis perpendicular to the first axis and which is rigidly connected to the body, between an inoperative configuration in which the operative portion of the module is housed inside the body and a use configuration in which the operative portion of the module projects from the body. The two modules or two of the modules are arranged on either side of a single arm of the body, which extends along the first axis from a base to an end of the body.

An instrument includes a body, at least two modules, each separate from the one or other modules, including an operative portion and being movable relative to the body and, for each module, a mechanism for guiding the translation and rotation of the module along the body, the module being movable relative to the body, successively in translation parallel to a first axis and in rotation about a second axis perpendicular to the first axis and which is rigidly connected to the body, between an inoperative configuration in which the operative portion of the module is housed inside the body and a use configuration in which the operative portion of the module projects from the body. The two modules or two of the modules are arranged on either side of a single arm of the body, which extends along the first axis from a base to an end of the body.

The present utility model refers to a page marker device of the type that can be used between the pages of a book or publication, being that the marker incorporates a writing graphite. The device comprises a strip of graphite partially embedded in the elongate body. The recessed portion of the graphite strip has a length greater than the length of the non-embedded part of the graphite strip, and the elongate thin body has a flat part with a surface suitable for printing.

The present utility model refers to a page marker device of the type that can be used between the pages of a book or publication, being that the marker incorporates a writing graphite. The device comprises a strip of graphite partially embedded in the elongate body. The recessed portion of the graphite strip has a length greater than the length of the non-embedded part of the graphite strip, and the elongate thin body has a flat part with a surface suitable for printing.

Writing compositions capable of undergoing a color development when brought into contact with a specific substrate including a color change-inducing compound are provided. Application of the writing compositions to surfaces other than the intended substrate will avoid color development and prevent staining of the unintended surfaces. The writing compositions include at least one particulate filler including a clay, at least one leuco dye, one or more waxes chosen from a group consisting of polyethylene wax, soy wax, paraffin wax, and beeswax, at least one thermoplastic binder material including a polyethylene, titanium dioxide, and optionally at least one additive.

Writing compositions capable of undergoing a color development when brought into contact with a specific substrate including a color change-inducing compound are provided. Application of the writing compositions to surfaces other than the intended substrate will avoid color development and prevent staining of the unintended surfaces. The writing compositions include at least one particulate filler including a clay, at least one leuco dye, one or more waxes chosen from a group consisting of polyethylene wax, soy wax, paraffin wax, and beeswax, at least one thermoplastic binder material including a polyethylene, titanium dioxide, and optionally at least one additive.

There is a lead casing for pencil for writing, drawing, marking, plotting, and/or coloring, made of a composition having, by weight relative to the total weight of the lead casing for pencil: a) from 50 to 95% of a mixture of polylactic acid and polybutylene adipate terephthalate in a weight ratio polylactic acid/polybutylene adipate terephthalate ranging from 60/40 to 90/10, and b) from 5 to 40% of vegetable fillers chosen in the group consisting of wood fibers. There is also a pencil including the lead casing for the pencil of the disclosure for writing, drawing, marking, plotting, and/or coloring, as well as a method for manufacturing such a pencil.

There is a lead casing for pencil for writing, drawing, marking, plotting, and/or coloring, made of a composition having, by weight relative to the total weight of the lead casing for pencil: a) from 50 to 95% of a mixture of polylactic acid and polybutylene adipate terephthalate in a weight ratio polylactic acid/polybutylene adipate terephthalate ranging from 60/40 to 90/10, and b) from 5 to 40% of vegetable fillers chosen in the group consisting of wood fibers. There is also a pencil including the lead casing for the pencil of the disclosure for writing, drawing, marking, plotting, and/or coloring, as well as a method for manufacturing such a pencil.

A method for producing a powder lead is disclosed, wherein at least one colourant, at least one filler and at least one binder are mixed with a carrier liquid, leads are shaped from the wet compound, the leads shaped in step b) are guided through a chamber in which they are exposed to a pulverulent covering agent, and the powdered leads are guided into a drying apparatus and dried therein.