DE102015118940A1 - pen - Google Patents

Abstract

The invention relates to a pin (1), comprising a mine (2) and a sheathing element (4) sheathing the same at least in sections, wherein the sheathing element (4) is formed at least in sections, in particular completely, from a waxy material.

Description

The invention relates to a pin, comprising a mine and a sheathing element covering the same at least in sections.

Pins comprising mines and a sheathing element covering them at least in sections are known. The casing of the mine with a corresponding casing element may be useful in various aspects; For example, a sheath element of a less dimensionally stable or very soft mine, as they u. a. used in cosmetic pencils, give a certain dimensional stability.

To date, corresponding sheath elements of relatively stable materials such. B. wood or wood substitutes formed. For a sharpening of the pin or the jacketed mine of the pen accordingly sharpeners with mechanically comparatively stable tip elements are required. Typically, for sharpening corresponding pins, sharpeners with hardened steel tip elements having a hardness above 60 HRC (Rockwell hardness) are used.

Due to the Anspitzeigenschaften corresponding pins or mines, which compelling the use mechanically sufficiently stable, d. H. In particular, hard, pointed elements require, the production of corresponding sharpeners is relatively expensive or costly under production or economic aspects.

The invention has for its object to provide a pen with the contrast improved Anspitzeigenschaften.

The object is achieved by a pin according to claim 1. The dependent claims relate to various embodiments of the pen. The object is further achieved by a mine according to claim 19.

The pin described herein may in principle be any type of pin having a corresponding sheathed lead. By way of example only, as possible embodiments of the pen, writing or crayons, i. H. z. Pencils, crayons, chalk pencils, wax pencils, or cosmetic pencils, d. H. z. B. cover, eyebrow, lip or Kajalstifte called.

The mine is made of at least one on a substrate, for. B. paper for a writing or drawing pen or certain areas of skin for a cosmetic pencil, applicable mine material or at least includes such.

The mine is typically less dimensionally stable or very soft, the pin is thus typically a soft pencil - so at least partially sheathing with a corresponding sheath element is required or required. In principle, however, it is also conceivable that the mine is comparatively dimensionally stable or hard - which means that the pin may in principle also be a hard lead pin, from the lead of which the sheath element covering it is to be temporarily removed in order to expose the lead.

Regardless of the structural properties of the mine, the mine is at least partially surrounded by a sheath element or at least partially encased with a sheath element. The shroud typically extends at least in sections along the exposed surface of the mine and therefore typically rests directly on the exposed surface of the mine. Unless the pin has a receiving element (housing), the sheath element may form the exposed outer (upper) surface of the pin. There is typically a stable, in particular non-rotatable, connection between the sheathing element and the mine.

The sheath element can prevent the mine from aging, oxidation or external influences, d. H. z. B. mechanical and / or thermal and / or climatic influences, in particular moisture, and / or in function of a "diffusion barrier" before the out-diffusion, in particular volatile, protect components of the mine. The aspect of a corresponding diffusion barrier may be of importance in particular for embodiments of the pencil as a cosmetic stick, since the leads of cosmetic pencils regularly contain volatiles.

The effect of a "diffusion barrier" can only result from the structural properties of the sheath element; Concretely, the sheathing element can have a density or permeability from home, which prevents outdiffusion of corresponding components of the mine.

If the sheathing element does not have an inherent density or permeability, which prevents the corresponding components of the mine from diffusing out, a diffusion barrier to components of the mine, in particular volatile constituents of the mine, can also be formed in such a way by the sheathing element with corresponding volatile constituents the mine or these chemically similar volatiles is saturated or supersaturated. The respective concentrations or (small) concentration differences of corresponding volatile constituents in the mine and in the shell element complicate or prevent the diffusion of the volatile constituents of the mine from the mine. By a saturation or supersaturation of the sheath element with corresponding volatile constituents of the mine or these chemically similar volatile constituents, a "depot effect" can be obtained, which is a diffusion of volatiles contained in the sheath element in the mine, possibly even a back diffusion of from Mine is allowed into the casing element diffused volatiles back into the mine, so that a certain concentration of corresponding volatiles in the mine can be ensured.

The pin can be used in a variant without a receiving element for receiving the at least partially sheathed mine by a user directly to the mine respectively the sheathing that surrounds this sheath element. In one embodiment, the pin can be gripped by a user directly on the receiving element with a receiving element for receiving the at least partially sheathed mine.

The sheathing element covering the refill, at least in sections, is formed at least in sections, in particular completely, from a waxy material. In all cases, therefore, the sheathing element at least in sections, in particular completely, a waxy and comparatively, d. H. in particular compared to pure plastics (polymers), soft, d. h., As can be seen below, in particular, also low impact, texture on.

The waxy nature of the sheath element generally results in particular material removal properties. The special Materialabtragseigenschaften allow a particularly simple removal of material from the sheath element.

The waxy nature of the sheath element results in particular in particular tipping or molding properties. The special Anspitz- or Anformeigenschaften allow a simple sharpening or molding with relatively soft, d. H. especially uncured, pointed elements. The waxy or soft nature of the sheath element results from the further explained below chemical-physical or structural properties of the waxy material.

The waxy nature of the sheath element determines the Anspitz- or Anformeigenschaften essential. The tipping or molding properties typically differ significantly from known wood or plastic tipped pens; Thus, the torque required for sharpening or molding with a conventional mint sharpener having a hardened and ground blade-shaped tip member is typically well below the torque typically required to sharpen a wood or plastic-tipped pin. The torque of the lead required for sharpening or molding can be significantly below 6 Ncm, in particular at 40 revolutions per minute.

For sharpening or molding of the pin or the mine are in contrast to the known from the prior art jacketed mines no sharpeners with mechanically particularly stable, d. H. in particular hardened, pointed elements, d. H. especially pointed elements made of hardened steel, required. The waxy nature of the sheath may optionally even a material removal, for. B. by scraping, of the sheath element, at least one deformation, d. H. allow a scratching of the sheath element with a fingernail.

The pen can be due to the waxy nature of the sheath element sonach without problems even with pointed elements of comparatively soft materials, d. H. z. As comparatively soft or uncured metals, especially unhardened steels, or plastic, sharpen, without this an extraordinary wear of the pointed elements occurs. The pointed elements are therefore less stressed by the sharpening of the pin compared to conventional pins. It follows that the sheathing element by a comparatively soft material, d. H. z. B. a comparatively soft or uncured metal, in particular uncured steel, or a plastic, formed pointed element easily ab- or sharpened or off or is anformbar. By a comparatively soft metal is meant, in particular, a metal having a hardness of at most 40 HRC (hardness Rockwell). In contrast, hardened steels, such as are required and used for sharpening known pins for a certain stability or cutting edge hitherto, typically have a hardness of at least 60 HRC (Rockwell hardness).

The possibility of sharpening the pin with uncured metals, especially uncured stainless steels, or by from plastics formed pointed elements, in particular in conjunction with cosmetic pencils, also has a positive effect on the formation of corresponding sharpeners, since they do not rust and therefore do not need to be provided with rust protection measures, in particular rust-proof coatings. The sharpeners can be cleaned in a relatively simple manner, for example by rinsing with water, without corroding.

The sheathing element differs in its structural properties and thus in its Anspitz- or Anformeigenschaften insofar clearly from known, typically made of wood, wood substitutes or plastics (polymers), sheaths of pins. The wax-like material forming the sheathing element therefore does not represent a wood substitute due to its structural properties, in particular due to its particular pointing or conforming properties.

Sharp elements of conventional sharpeners usually have a cutting edge width of approximately 1 μm at the cutting edge. The cutting edge width of the tip elements of conventional sharpeners can be razor sharp. From a cutting edge width of 5 microns corresponding tip elements for sharpening conventional pins are no longer suitable, as they allow (with normal force) no sharpening more. The cutting edge width is defined as follows: a pointed element has, in the region of its free end, a bent or curved region, by means of which the cutting edge radius is defined. The cutting edge width is defined by the distance between the opposing points of the tip member at which the arcuate portion and hence the cutting edge radius begins, i.e., the cutting edge radius. H. defines the distance between the respective points at which the pointed element transitions tangentially into the cutting edge radius. This distance is comparatively small for sharp pointed elements, d. H. especially below 5 microns, and comparatively large for blunt pointed elements, d. H. in particular (far) above 5 μm.

Compared with known pins or wood substitute material, the pin described herein differs in particular in its tipping behavior when dealing with fine or sparsely pointed elements (cutting edges) with cutting edge radii or cutting edge widths (far) above 10 μm , d. H. z. B. a cut edge width of about 20 microns or (far) more, easily molding or sharpening. With such pointed elements known pens taken from wood or wood substitute material can not be molded or sharpened.

In comparison to known pins made of plastic, the pin described herein differs in particular in its Anspitzverhalten or when it can be with little fine or sharp pointed elements (cutting) with cutting edge radii above 10 microns molding or sharpening. As mentioned, the sheath element of the pin described herein has lower hardness compared to plastic sheaths of known pins. Further, the torque required to sharpen the pin described herein is lower compared to known pins having plastic sheaths.

The waxy material and thus also the sheath element can be formed exclusively from one or more (different) waxy constituent (s). The waxy material may accordingly contain only waxy ingredients. The waxy ingredient (s) condition or condition the particular structural properties described, i. H. in particular the special Anspitz- or Anformeigenschaften, the sheath element.

However, it is also conceivable that the wax-like material and thus also the sheath element is formed from at least one waxy constituent and at least one non-waxy constituent. Non-waxy constituents may be inorganic and / or organic additives, in particular additives or fillers, such as. As thermoplastics (polymers), graphite, wood flour, calcium carbonate (lime), kaolin or talc, color pigments, etc. be. The waxy material may also contain, in addition to one or more (different) waxy ingredients, one or more (different) non-waxy ingredients. If the waxy material also contains non-waxy constituents, the proportion of the waxy constituents is so high compared to the non-waxy constituents that the sheathing element in any case has the mentioned waxy nature. The waxy ingredient (s) condition or condition the particular structural properties described herein, d. H. in particular the special Anspitz- or Anformeigenschaften, the sheath element.

Specific proportions or quantitative compositions of the sheath element, ie, specific (quantitative) proportions of the waxy material, resulting from the particular concrete composition of the waxy constituents and / or the (particular) concrete composition of the non-waxy constituents. The proportion of the waxy constituents is typically at least 30% by weight, in particular above 50% by weight. Accordingly, the Proportion of non-waxy constituents typically at most 70 wt .-%, in particular below 50 wt .-%.

The waxy material is typically such that the shroud element performs the tasks typically required by the application, i. H. in particular a protection of the mine against external influences, d. H. mechanical and / or thermal and / or climatic influences, in particular moisture, and / or as a function of a "diffusion barrier" before out-diffusion, in particular volatile, constituents of the mine, so that the mine is not impaired in its original function and handle easily leaves. The wax-like constituents influence the properties of the sheathing element insofar in particular with regard to an improvement of the sharpening or molding properties.

The hardness of the sheath element is typically below 60 Shore D. In particular, the hardness of the sheath element in a hardness range between 10 and 50 Shore D. However, the hardness of the sheath element may be significantly below 10 Shore D in embodiments of the pin with a corresponding receiving element. The hardness of the cladding element can be specifically varied by its concrete proportionate or chemical composition, in particular the addition of non-waxy constituents.

The impact resistance of the sheath element is typically below the impact strength of non-waxy polyolefinic polymers, i. H. especially below the impact strength of polyethylene and polypropylene.

A waxy ingredient may in particular be a wax.

Waxes can generally be defined by different chemical or physical or structural parameters or properties, which will be discussed in more detail below by way of example. Decisive in this case is in particular the structural structure of the waxes, since this determines the chemical-physical or structural properties significantly.

The structural structure of waxes typically consists of particular molecules or molecular compounds. The chemical-physical properties of waxes are determined essentially by the molecular weight or the chain length of the molecules or molecular compounds. The molecular weight or the chain length of the molecules or molecular compounds is typically below the molecular weight or the chain length of, for. B. thermoplastic, plastics. Accordingly, ethylenes having a comparatively low molecular weight or a comparatively short chain length are waxes. By increasing the molecular weight or the chain length of the ethylene lose their waxy properties, it is no longer waxy materials, but "solid" or "hard" plastics.

The structural structure of waxes is characterized by a coarse to fine crystalline structure. The coarse to fine-crystalline structure also influences the optical properties of waxes. Waxes typically have some opacity.

Likewise, the structural design of a comparatively low abrasion resistance. The abrasion resistance is typically below the abrasion resistance of polyolefinic polymers.

In terms of thermal properties, waxes are characterized by the fact that at temperatures above 40.degree. C. they decompose to a melt-free state or do not turn into a melt-shaped state at temperatures below 40.degree. Waxes are basically highly temperature dependent in their consistency and solubility. Typically, waxes are already comparatively low in viscosity at temperatures slightly above their respective melting point. At temperatures below their melting point, especially at temperatures of about 20 ° C, waxes are kneaded or hard to brittle hard. Of course, the wax-like constituent or the wax-like material in concrete embodiments of the pen may, if appropriate, have a higher thermal stability than pure waxes. In terms of mechanical properties, waxes are characterized in particular by a comparatively low hardness. As mentioned, the hardness of the sheath element and thus of the waxy material forming it is typically below 60 Shore D, in particular in a hardness range between 10 and 50 Shore D. The hardness of the sheath element can, as mentioned, be determined by its concrete proportion or chemical composition deliberately vary.

Waxes are, in particular already under the influence of relatively low temperatures, good formability. In addition, it is already possible to remove material from waxes with comparatively low forces, ie in particular to lift off chips. The material removal or chip formation is determined in particular by the brittleness of the respective wax. Waxes can be a material removal, z. B. by scraping, at least one deformation, ie a scratch, allow with a fingernail.

The abovementioned chemical-physical or structural properties of waxes may, of course, vary depending on the specific structural structure or the specific proportionate or chemical composition of the waxes or waxy constituents or waxy materials formed accordingly from waxes. For the waxy material used to form the sheath element, the structural properties of waxes in their solid state are particularly relevant.

The waxy constituent may be formed from at least one natural, in particular vegetable and / or animal and / or geological, wax and / or at least one synthetic wax. The waxy constituent may thus be a natural or synthetic wax or a mixture of (different) natural and / or (different) synthetic waxes. If a mixture of (different) natural and / or (different) synthetic waxes is present, these may vary in their structural properties, i. H. z. B. in their melting points, the same, similar or different. A waxy material can therefore be used as waxy components z. B. low melting waxes, d. H. especially in a temperature range between 40 and 60 ° C melting waxes, and refractory waxes, d. H. especially in a temperature range between 80 and 160 ° C melting waxes included.

If the waxy ingredient is formed from a natural wax, the natural wax may be formed from natural hydrocarbon compounds or contain natural hydrocarbon compounds. The molecular weight or chain length of the hydrocarbon compounds is significantly responsible for the waxy properties of the natural wax. The molecular weight or the chain length of the hydrocarbon compounds is thus chosen so low that the hydrocarbon compounds form a wax. The same applies to other parameters relating to the hydrocarbon compounds, ie. H. optionally for branching and crosslinking levels.

In principle, all fossil or non-fossil waxes come into consideration as natural waxes. Fossil waxes may be petroleum waxes, especially ozokerite and macro- or microcrystalline fossil paraffin waxes. Fossil waxes can continue geological waxes, z. B. lignite, peat or montan waxes, especially geological acid waxes, ester waxes or partially saponified waxes, be. Non-fossil waxes may be animal waxes, especially bee, shellac, spermaceti or wool waxes. Non-fossil waxes may also be vegetable waxes, especially candelilla, carnauba, china, japanese or sugarcane waxes. Natural waxes may generally be formed from at least one natural wax of the following group or contain at least one natural wax of the following group: beeswax, candelilla wax, carnauba wax, china wax, japan wax, spermaceti, wool wax, sugarcane wax, montan wax, ground wax.

When the waxy component is formed from a synthetic wax, the synthetic wax may be formed from synthetic hydrocarbon compounds or contain synthetic hydrocarbon compounds. The molecular weight or the chain length of the hydrocarbon compounds is significantly responsible for the waxy properties of the synthetic wax. The molecular weight or the chain length of the hydrocarbon compounds is thus chosen so low that the hydrocarbon compounds form a wax. The same applies to other parameters relating to the hydrocarbon compounds, ie. H. optionally for branching and crosslinking levels. The hydrocarbon compounds are, in particular, oligomers which, owing to a comparatively low molecular weight or a comparatively small chain length, are present as waxes or have wax-like properties.

In principle, all partially or fully synthetic waxes come into consideration as synthetic waxes. Semi-synthetic waxes may fatty acid amide waxes, in particular distearylethylenediamides or erucamides, or hydrogenated fatty acid waxes, for. B. produced by hydrogenation of soybean oil soy wax. Fully synthetic waxes may be (non-polar) polyolefin waxes, especially polyethylene or polypropylene waxes. Fully synthetic waxes may continue to be Fischer-Tropsch waxes, i. H. waxes produced by the Fischer-Tropsch process. Fully synthetic waxes may also be polar synthetic waxes, in particular oxidized or grafted polyolefin waxes or copolymer waxes. Synthetic waxes may generally be formed from at least one aliphatic or polyolefinic wax, in particular based on paraffin, polyethylene or polypropylene, or contain at least one aliphatic or polyolefinic wax, in particular based on paraffin, polyethylene or polypropylene.

The use of aliphatic or polyolefinic waxes is particularly in view of the controlled by polymerization or Oligomerization specifically adjustable or modifiable molecular weights or chain lengths of respective hydrocarbon compounds and thus the targeted controlled by controlled polymerization or oligomerization properties of appropriate aliphatic or polyolefinic waxes appropriate. The use of aliphatic or polyolefinic waxes is also useful due to the good processing properties and their non-toxic properties. In addition, the use of aliphatic or polyolefinic waxes may be expedient from an economic point of view. In principle, it is true that aliphatic or polyolefinic compounds having a certain molecular weight or a specific chain length, regardless of whether it is z. As amines, aldehydes, alcohols, ethers, esters, ketones, etc., have waxy properties.

A waxy ingredient may be formed from an ester compound, especially a fatty acid ester compound, or a salt of a fatty acid ester compound (soap). Accordingly, waxy constituents may also consist of, optionally saponified, fats or fatty acid ester compounds, eg. Formed based palmitic or stearic acid, and / or natural resins or resin compounds.

The sheathing element may have a higher mechanical stability, in particular a higher dimensional stability or dimensional stability and / or a higher hardness, than the mine. The sheath element is sufficiently stable despite its waxy nature, d. H. particularly dimensionally stable, that it does not deform under normal handling of the pen. A comparatively higher mechanical stability, in particular a higher dimensional stability or dimensional stability, of the sheathing element by adding certain non-waxy constituents, for. B. by addition of organic additives, d. H. z. As thermoplastics (polymers), such as polyethylene or polypropylene, result. However, a comparatively higher mechanical stability, in particular a higher dimensional stability or dimensional stability, of the sheathing element can also result from a comparatively large wall thickness of the sheathing element.

In principle, it is possible that the mine is (also) formed from a waxy material or comprises at least one such. This can be especially true for chalk or wax pencils, d. H. especially wax crayons, or cosmetic pencils be the case. The waxy material of the mine and the waxy material of the sheath element typically differ in their chemical and / or physical, and in particular mechanical, properties. As mentioned, the sheathing element may have a higher mechanical stability, in particular a higher dimensional stability or dimensional stability and / or a higher hardness, and thus different structural properties than the mine.

The mine and the sheathing element can, in particular in one piece, also be formed from the same waxy material. The cladding element may then be due to at least one carried out in the region of its surface action to increase the mechanical stability, in particular the dimensional stability or dimensional stability and / or hardness, in particular a treatment with high-energy radiation, eg. As electron or UV radiation, a higher mechanical stability, in particular a higher dimensional stability or dimensional stability and / or a higher hardness, as the mine.

The, in particular one-piece, training of the mine and the sheath element of the same waxy material can bring manufacturing advantages. The sheathing element can be formed via the near-surface implementation of a corresponding measure to increase the dimensional stability and / or the mechanical stability. By variation of certain procedural parameters, d. H. In particular, duration, energy density, intensity, etc., of the measure, the sheath element with certain structural properties, d. H. z. As a desired thickness, dimensional stability and mechanical stability, are formed.

Of course, it is possible to provide the sheathing element in the region of its exposed outer (upper) surfaces at least in sections with a coating or sheath, in order to influence the haptic impression when touching the sheath element or a handling of the pin. A corresponding coating can, for. B. be formed by a lacquer which can be removed in a sharpening or molding of the pen. A corresponding enclosure may, for. B. be formed by a paper or pulp material, which can be removed in a sharpening or molding of the pen (with).

In the following, different variants of the casing of the mine are explained in more detail by the casing element. These are always based on an elongated, d. H. in particular cylindrical or prismatic, geometric shape of the mine or the pin.

Starting from a mine having an elongated geometric shape, the sheathing element can at least partially cut the mine only in the area of its longitudinal side encase or encase the mine in the area of its longitudinal side and in the area of at least one free end of the mine. In the case of a brand-new pin, it is also possible for both free ends of the lead to be sheathed so that the sheath element can be removed in the region of the free end forming the lead tip before the pin is used. A complete casing of the mine, for example, for transport and storage of brand new pens, especially brand new softwood pencils, be useful because the mine is protected from external influences.

The pin can, as mentioned, comprise a receiving element for receiving the at least partially sheathed mine. The at least partially coated mine is then at least partially included in the receiving element. The receiving element may have a (hollow) cylindrical or prismatic outer geometric shape or basic shape and a, in particular cylindrical, receiving or interior space for receiving the lead or other components of the pin. The receiving element may also be referred to or considered as the housing of the pen. The receiving element may be formed from a polymer plastic (polymer).

If the pin comprises a corresponding receiving element for receiving the at least partially sheathed mine, it may further comprise a mine feed device, which is adapted to the recorded in the receiving element at least partially sheathed mine in a movement, d. H. in particular in an axial feed movement to move relative to the receiving element. The mine feed device is therefore used to exert a force on the received in the receiving element mine, which results in an axial feed movement of the mine relative to the receiving element. Of course, can be realized on the mine feed device in principle, an axial feed movement opposite axial return movement of the mine. However, an axial retracting movement of the refill may, if appropriate, be prevented by suitable blocking elements, so that the refill can only be set into an axial advancing movement. The lead-advancing device may comprise an actuatable element which can be coupled or coupled to the refill and which can be actuated by a user, e.g. B. can be operated via an actuating portion to move the mine in a corresponding movement relative to the receiving element.

The invention further relates to a refill for a pen, in particular for a stylus as described above. The mine is at least partially encased with or by a sheath element. The mine is characterized in that the sheathing element is at least partially, in particular completely, formed from a waxy material. Accordingly, all statements in connection with the mine of the above described pin apply analogously to the mine.

The invention further relates to a sharpener device for a pin as described above or a mine as described above. The sharpener is designed to sharpen or mold the lead of the pencil. The spreader device is characterized in that it comprises at least one of a comparatively soft material, i. H. z. B. an uncured metal, in particular an unhardened steel or stainless steel, or a plastic, in particular polyamide, polycarbonate or polyethylene terephthalate, formed, typically blade or blade-shaped, pointed element comprises. The spreader device can be formed integrally overall. In the Spitzereinrichtung can be z. B. to act an injection molded part of an injection-moldable plastic. In a (additional) Faconmesser comprehensive Spitzereinrichtung, d. H. z. B. a sharpener for a cosmetic pencil, the Faconmesser can therefore be formed integrally with the, in particular blade or blade-shaped, pointed element and / or other components of the sharpener.

The possibility of sharpening or molding of the sheathed mine by sharp elements formed from uncured metals, in particular uncured steels or stainless steels, or plastics, as mentioned, in particular in conjunction with cosmetic pencils, has a positive effect on the sharpener or the pointed elements associated therewith because they do not rust and therefore do not need to be provided with anti-corrosion measures, in particular anti-corrosion varnishes. The sharpeners can be in a comparatively simple way, d. H. For example, by rinsing with water, clean, without corroding.

The invention is explained in more detail with reference to embodiments in the drawing figures. Showing:

1 - 3 each a schematic diagram of a pin according to an embodiment;

4 a schematic diagram of a sharpener device for sharpening the in the 1 . 2 or 3 shown pen;

5 . 6 depending on a schematic diagram of a pin according to another embodiment.

1 shows a schematic diagram of a pen 1 according to a first embodiment. The pencil 1 is in 1 shown in a longitudinal section.

The pencil 1 includes a mine 2 , The mine 2 includes an elongated mine body 3 , The mine 2 is from a on a ground, z. B. paper for a writing or drawing pen or certain areas of skin for a cosmetic pencil, applicable mine material or at least includes such.

The mine 2 is not dimensionally stable or very soft, - in the pen 1 it is therefore a soft pencil - so at least partially sheathing with a sheath element 4 offered or required. In principle, however, it would also be conceivable that the mine 2 comparatively dimensionally stable or hard - in the pen 1 it could in principle also be a hard pencil, from the mine 2 the sheathing element surrounding this 4 Temporarily remove is to the mine 2 expose.

The mine 2 is sections of a sheath element 4 surrounded or sections with a sheath element 4 jacketed. The sheath element 4 extends at least in sections along the exposed surface of the mine 2 and therefore lies directly on the exposed surface of the mine 2 on. Between the sheath element 4 and the mine 2 There is a stable, especially non-rotatable connection.

Obviously, the sheath element sheathed 4 the mine 2 in the region of its longitudinal side and in the region of a free end, so that the sheath element 4 in the in 1 shown longitudinally sectioned view has a U-shaped geometric shape. The sheath element 4 forms (essentially) the exposed outer (upper) surface of the mine 2 or the pen 1 ,

The sheath element 4 protects the mine 2 against aging, oxidation and against external influences, ie in particular mechanical and / or thermal and / or climatic influences, in particular moisture, and / or as a function of a "diffusion barrier" before out-diffusion, in particular volatile, constituents of the mine 2 ,

At the pen 1 It can basically be any kind of pen 1 , which is an appropriately shrouded mine 2 has, act. For example, it may be at the pin 1 to a writing or drawing pen, ie, for example, a pencil, crayon, chalk pen, wax pen, or a cosmetic pencils, ie, for example, a cover, eyebrow, lip or Kajalstift act.

That's the mine 2 partially sheathing sheathing element 4 is made of a waxy material. The sheath element 4 has therefore a waxy and relatively soft texture. The waxy or soft nature of the sheath element 4 results from the chemical-physical or structural properties of the waxy material.

The waxy nature of the sheath element 4 results in special Materialabtragseigenschaften, ie in particular Anspitz- or Anformeigenschaften which a particularly simple removal of material from the sheath element 4 , in particular a particularly simple sharpening or molding with comparatively soft, ie in particular uncured, pointed elements 5 allow.

Due to the waxy and comparatively soft nature of the sheath element 4 differ the Anspitz- or molding properties of the pen 1 distinct from wood-tipped pens; so z. B. the torque required for sharpening or molding significantly below the required for sharpening a known wood or plastic-formed pin with a conventional mint sharpener with a hardened and ground tip element torque. For sharpening or molding the pen 1 respectively the mine 2 are not sharpeners with mechanically particularly stable, ie in particular hard, pointed elements 5 , ie in particular pointed elements 5 made of hardened steel, required. The waxy nature of the sheath element 4 may possibly even a material removal, for. B. by scraping, of the sheath element 4 , at least one deformation, ie a scoring, of the sheath element 4 to enable with a fingernail.

The pencil 1 can be due to the waxy nature of the sheath element 4 easy already with pointed elements 5 from comparatively soft materials, ie, for example comparatively soft or uncured metals, in particular uncured steels, or plastic, sharpen, without this an extraordinary wear of the pointed elements 5 occurs. The pointed elements 5 are less stressed by sharpening compared to conventional mines. It follows that the sheath element 4 by a sharpener element formed from a comparatively soft material, ie, for example, a comparatively soft or uncured metal, in particular uncured steel, or a plastic 5 can be easily removed or sharpened or ab- or formable. Among a comparatively soft metal is in particular a metal having a hardness of not more than 40 HRC (hardness Rockwell) to understand. In contrast, hardened steels, such as are required and used for sharpening known pins for a certain stability or cutting edge hitherto, typically have a hardness of at least 60 HRC (Rockwell hardness).

The sheath element 4 differs in its structural properties, in particular in its Anspitz- or Anformeigenschaften, significantly from known, typically formed from wood or wood substitutes, casings of pins. The sheathing element 4 forming waxy material is due to its structural properties, in particular its special Anspitz- or Anformeigenschaften, no wood substitute.

The waxy material and thus also the sheath element 4 may be formed solely of one or more (different) waxy constituent (s). The waxy material may accordingly contain only waxy ingredients. The waxy ingredient (s) condition or condition the particular structural properties described, ie, in particular, the particular pointing or conforming properties of the sheath element 4 ,

However, it is also conceivable that the wax-like material and thus also the sheath element 4 is formed from at least one waxy ingredient and at least one non-waxy ingredient. Non-waxy constituents may be inorganic and / or organic additives or fillers, such as. As graphite, wood flour, calcium carbonate (lime), kaolin or talc, color pigments, etc. be. The waxy material may also contain, in addition to one or more (different) waxy ingredients, one or more (different) non-waxy ingredients.

If the waxy material also contains non-waxy constituents, the proportion of the waxy constituents is so high in comparison with the non-waxy constituents that the sheathing element 4 in any case has the mentioned waxy nature. Specific proportion or quantitative compositions of the sheath element 4 , ie also concrete (quantitative) proportions of the waxy material, resulting from the particular concrete composition of the waxy constituents and / or the (particular) concrete composition of the non-waxy constituents. The proportion of the waxy constituents is typically at least 30% by weight, in particular above 50% by weight.

The waxy material is such that the sheath element 4 the above mentioned tasks, ie in particular protection of the mine 2 against external influences, ie in particular mechanical and / or thermal and / or climatic influences, in particular moisture, and / or as a function of a "diffusion barrier" before out-diffusion, in particular volatile, constituents of the mine 2 , or as a function of a "depot", a diffusion of in the corresponding volatiles of the mine 2 saturated or supersaturated sheath element 4 contained volatile components in the mine 2 make the mine 2 is not impaired in its original function and can be handled easily. The waxy material affects the properties of the sheath element 4 in particular with regard to an improvement in the Anspitz- or molding properties.

The hardness of the sheath element 4 is (significantly) below 60 Shore D, in particular in a hardness range between 10 and 50 Shore D. The impact resistance of the sheath element 4 is below the impact strength of polyolefinic polymers, ie in particular below the impact resistance of polyethylene and polypropylene.

Waxy components of the waxy material may be formed from at least one natural, in particular vegetable and / or animal and / or geological, wax and / or at least one synthetic wax. Waxy ingredients may be natural or synthetic wax or a mixture of different natural and / or synthetic waxes.

In the embodiments shown in FIGS. Contains the waxy material as a waxy component at least z. As a synthetic wax. The synthetic wax is formed from synthetic hydrocarbon compounds or contains synthetic hydrocarbon compounds. The molecular weight or the chain length of the hydrocarbon compounds is significantly responsible for the waxy properties of the synthetic wax. The molecular weight or the chain length of the hydrocarbon compounds is so low that the hydrocarbon compounds form a wax. The same applies to other parameters relating to the hydrocarbon compounds, ie. H. optionally for branching and crosslinking levels. The hydrocarbon compounds are, in particular, oligomers which, owing to a comparatively low molecular weight or a comparatively small chain length, are present as waxes or have wax-like properties.

In principle, all partially or fully synthetic waxes come into consideration as synthetic waxes. Synthetic waxes may generally be formed from at least one aliphatic or polyolefinic wax, in particular based on paraffin, polyethylene or polypropylene, or contain at least one aliphatic or polyolefinic wax, in particular based on paraffin, polyethylene or polypropylene. In the embodiments shown in the figures, the synthetic wax is a polyolefinic wax, namely a synthetic polyethylene wax.

The use of polyolefinic waxes is expedient in particular with regard to the molecular weights or chain lengths of respective hydrocarbon compounds which can be specifically adjusted or influenced by controlled polymerization or oligomerization and thus the properties of corresponding polyolefinic waxes which can be specifically adjusted by controlled polymerization or oligomerization. The use of polyolefinic waxes is also useful because of their good processing properties and their non-toxic properties. In addition, the use of polyolefinic waxes may be useful from an economic point of view.

As mentioned, the sheathing element could 4 as waxy ingredients also contain at least one natural wax. A natural wax is formed from natural hydrocarbon compounds or contains natural hydrocarbon compounds. The molecular weight or the chain length of the hydrocarbon compounds is also so low that the hydrocarbon compounds form a wax. The same applies to other parameters relating to the hydrocarbon compounds, ie, if appropriate, for degrees of branching and crosslinking.

In principle, all fossil or non-fossil waxes come into consideration as natural waxes. Natural waxes may generally be formed from at least one natural wax of the following group or contain at least one natural wax of the following group: beeswax, candelilla wax, carnauba wax, china wax, japan wax, spermaceti, wool wax, sugarcane wax, montan wax, ground wax.

The sheath element 4 is despite its waxy nature sufficiently stable, ie in particular dimensionally stable, so that it is under normal use of the pen 1 not deformed. The sheath element 4 may have a higher mechanical stability, in particular a higher dimensional stability or dimensional stability and / or a higher hardness than the mine 2 exhibit. The comparatively higher mechanical stability, in particular a higher dimensional stability or dimensional stability, of the sheathing element 4 may be from the addition of non-waxy ingredients, ie, for example, an addition of non-waxy plastic, and / or from one compared to the diameter of the lead 2 large wall thickness of the sheath element 4 result. Unless, as in the in the 3 . 5 shown embodiments, a receiving element 7 for receiving the jacketed mine 2 is present, the sheath element 4 also a lower mechanical stability, in particular a lower dimensional stability or dimensional stability and / or a lower hardness than the mine 2 exhibit.

In principle, it is possible that even the mine 2 is formed from a waxy material or at least comprises such. This may in particular be the case with chalk or wax pencils, ie in particular wax crayons, or cosmetic pencils. The waxy material of the mine 2 and the waxy material of the sheath element 4 Typically, they may differ in their chemical and / or physical, especially mechanical, properties. As mentioned, the sheath element 4 a higher mechanical stability, in particular a higher dimensional stability or dimensional stability and / or a higher hardness, and thus different structural properties than the mine 2 exhibit.

2 shows a schematic diagram of a pen 1 according to a further embodiment. The pencil 1 is also in 2 shown in a longitudinal section.

Unlike the in 1 the embodiment shown is the mine 2 and the sheath element 4 in the 2 As shown by the dashed line in the region of the interface between the mine 2 and the sheath element 4 indicated, in one piece, ie formed from the same waxy material. The sheath element 4 However, due to a measure carried out in the area of its surface to increase the mechanical stability, in particular the dimensional stability or dimensional stability and / or hardness, in particular a treatment with high-energy radiation, for. As electron or UV radiation, a higher mechanical stability, in particular a higher dimensional stability or dimensional stability and / or a higher hardness than the mine 2 on.

The training of the mine 2 and the sheath element 4 from the same waxy material brings manufacturing advantages. The sheath element 4 is concerned about the near-surface implementation of an appropriate measure to increase the dimensional stability and / or the mechanical stability is formed. By varying certain procedural parameters, ie in particular duration, energy density, intensity, etc. of the measure, the sheath element 4 with certain structural properties, ie, for example, a desired thickness, dimensional stability, mechanical stability, etc., are formed.

As in 2 through the puncture in the area of the mine tip 6 is indicated, it would in principle also possible that the sheath element 4 the mine 2 at a brand new pen 1 completely encased. At a brand new pen 1 can therefore also both free ends of the mine 2 be sheathed so that the sheath element 4 in the area of the later mine top 6 forming free end before using the pen 1 to remove. A complete shroud of the mine 2 can be used for example for transport and storage of brand new pens 1 , especially brand new softwood pencils, be expedient as the mine 2 is protected from external influences.

3 shows a schematic diagram of a pen 1 according to a further embodiment. The pencil 1 is also in 3 shown in a longitudinal section.

The in 3 shown pen 1 is different from the ones in the 1 . 2 shown pins 1 in that he is one, z. B. formed of a plastic, receiving element 7 for receiving the with a sheath element 4 jacketed mine 2 includes. The mine 2 is partially in the receiving element 7 added. The receiving element 7 has a (hollow) cylindrical or prismatic outer geometric shape or basic shape and a, in particular cylindrical, receiving or interior space for receiving the mine 2 or other components of the pen 1 on. The receiving element 7 can be used as a housing of the pen 1 be designated or considered.

The in 3 shown pen 1 is different from the ones in the 1 . 2 shown pins 1 moreover, that he has a mine advancing device 8th which is adapted to that in the receiving element 7 recorded coated mine 2 in a movement, ie in particular in an axial feed movement, relative to the receiving element 7 to offset (see also this in the 5 . 6 shown embodiment). The mine feed device 8th serves therefore to a force on the in the receiving element 7 recorded mine 2 exercise, which in an axial feed movement of the mine 2 relative to the receiving element 7 results. Of course, on the mine feed device 8th in principle, an axial feed movement opposite axial return movement of the mine 2 be feasible. An axial return movement of the mine 2 However, it may be prevented by suitable blocking elements (not shown), so that the mine 2 can only be put into an axial feed motion. The mine feed device 8th includes one with the mine 2 coupled actuator 9 , which differs from a user z. B. can operate on an operating section to the mine 2 in a corresponding movement relative to the receiving element 7 to move.

Although in the 1 - 3 not shown, it is possible the sheathing element 4 In the region of its exposed outer (upper) surfaces at least partially provided with a coating or sheath to the haptic impression when touching the sheath element 4 or a handle of the pen 1 to influence specifically. A corresponding coating can, for. B. be formed by a lacquer, which in a sharpening or molding of the pen 1 can be removed. A corresponding enclosure may, for. B. be formed by a paper or pulp material, which in a sharpening or molding of the pen 1 (with) can be removed.

4 shows a schematic diagram of a Spitzereinrichtung 10 for sharpening or molding in the 1 . 2 or 3 shown pen 1 , The Spitzer device 10 is in 4 shown in a perspective view.

The Spitzer device 10 includes a blade or blade shaped tip element 5 , The Spitzer device 10 and the pointed element 5 can be integral, z. B. of a plastic, may be formed.

The pointed element 5 is formed of a comparatively soft material, ie an uncured metal, in particular an uncured steel or stainless steel. The pointed element 5 could also be formed from a plastic, in particular polyamide, polycarbonate or polyethylene terephthalate.

The possibility of sharpening or molding of the pen 1 by formed from uncured metals, in particular uncured steels or stainless steels, or plastics pointed elements 5 has a positive effect on the Spitzer device, especially in connection with cosmetic pencils 10 or the associated pointed elements 5 because they do not rust and therefore do not need to be provided with anti-rust measures, in particular anti-corrosion varnishes. The sharpeners 10 can be cleaned in a comparatively simple manner, ie for example by rinsing with water, without corroding.

The 5 . 6 each show a schematic diagram of a pen 1 according to a further embodiment. The pencil 1 is in 5 in a partially broken exploded view, from which the individual components of the pen 1 can be seen in more detail in the further embodiment, and in 6 in a partially broken view of the mounting state of the pen 1 shown.

The pencil 1 includes a receiving element 7 with a hollow cylindrical receiving portion 11 for receiving the with a corresponding sheath element 4 jacketed mine 2 and one in the receiving section 11 absorbable or absorbed coated mine 2 , The receiving element 7 can also act as a housing of the pen 1 be designated or considered, in which various other components of the pen 1 , especially the mine 2 , are recorded or recorded.

As mentioned, the sheath element 4 in embodiments with corresponding receiving elements 7 a lower mechanical stability, in particular a lower dimensional stability or dimensional stability and / or a lower hardness than the mine 2 exhibit. The sheath element 4 alone can serve the function of protecting the mine 2 before aging or take over the function of a "diffusion barrier".

The pen 1 is a cap element 13 belong. The cap element 13 is in the region of a free or open end on the rotationally fixed to the receiving element 7 fastened or attached. The cap element 13 So it is not relative to the recording part 2 and / or the receiving part 2 not relative to the cap member 13 rotatable. The cap element 13 serves to axially from the receiving element 7 respectively the hollow cylindrical receiving portion 11 projecting free end of the mine 2 when not using the pen 1 , z. B. from mechanical as well as from climatic influences to protect. The cap element 13 can therefore also be called or considered protective cap.

To accidentally remove the cap element 13 from the receiving element 7 To prevent, the receiving element 7 in the range of an axial approach 12 be provided with at least one projection (not shown), which in on the receiving element 7 attached state of the cap member 13 in a corresponding thereto on the inner periphery of the cap member 13 trained groove-like recess (not shown) engages.

The cap element 13 has an Anformeinrichtung or Spitzer device rotatably arranged or arranged 10 for molding or tips in the receiving element 7 recorded coated mine 2 on. The Spitzer device 10 can be (integral) with a pointed element 5 be formed of plastic. About in the cap element 13 integrated spreader device 10 is a molding or sharpening in the receiving element 7 recorded coated mine 2 that is, axially from the receiving element 7 projecting free end of the mine 2 , possible. The functionality of the cap element 13 goes over the protection of the mine 2 , z. B. from mechanical as well as from climatic influences beyond.

The rotationally fixed arrangement of the Spitzereinrichtung 10 in the cap element 13 is by form-fitting cooperation spitzereinrichtungsseitiger positive locking elements 15 with this corresponding cap element side counter-form-locking elements 16 , That is, a positive engagement spike device side projections realized in this corresponding cap element side recordings. The rotationally fixed arrangement of the Spitzereinrichtung 10 in the cap element 13 can therefore damage or non-destructive, z. B. for the purpose of replacement and / or cleaning of the sharpener device 10 and / or the cap member 13 , temporarily canceled.

The pencil 1 comprises a lead advancing device formed from a plurality of components operatively connected together 8th , About the mine feed device 8th is the in the receiving element side receiving portion 11 recorded mine 2 (at the receiving element 7 attached cap element 13 ) in an axial feed movement in the direction of the cap member side sharpener 10 movable. The mine feed device 8th Thus, it serves to apply a force to the receiving member side receiving portion 11 recorded mine 2 exercise, which in an advancing movement of the mine 2 in the direction of the cap element side sharpener 10 results. About the mine feed device 8th is of course also a corresponding feed movement opposite reverse thrust movement of the mine 2 possible.

The mine feed device 8th is designed such that a feed movement of the mine 2 to a defined at a given feed movement of the mine 2 Defined Abtragsvolumen the Spitzereinrichtung 10 is adjusted, so that at the given defined feed movement of the mine 2 given feed volume not greater than that on the Spitzer device 10 at the given defined feed movement of the mine 2 Abtragbare Abtragsvolumen is. That by the advancing movement of the mine 2 defined feed volume of the mine 2 per full turn or part turn of the mine 2 exceeds a certain angle that per full turn or part turn of the mine 2 by a certain angle over the Spitzereinrichtung 10 maximum abradable erosion volume therefore not.

Visible is the receiving element 7 at least partially formed with an internal thread. The receiving element 7 is also in the region of one end face, ie in the region of the axial extension 12 , with coupling elements 17 in the form of projections for the form-fitting formation of a rotationally fixed coupling with counter-coupling element (not shown) corresponding thereto on the part of the cap element 13 educated.

The mine feed device 8th includes an axially in the receiving part side receiving portion 11 receivable hollow cylindrical guide element 18 with guide sections 19 in the form of longitudinal recesses for the axial guidance of a cup-shaped or basket-shaped mine holding part 20 relative to the guide element 18 and a corresponding, axially in the guide element 18 receivable cup or basket-shaped mine holding element 20 for holding the mine 2 , The mine 2 is in the mine holding element 20 rotatably supported, which by the interaction of minenseitiger positive locking elements 22 , z. B. in the form of protrusions, with minenhalteelementseitigen Gegenformschlusselementen 23 , z. B. in the form of groove-like recordings, is realized. The mine holding element 20 points to the guide-part-side guide sections 19 corresponding counterpart sections 21 in the form of protrusions over which the mine retaining element 20 axially movably guided on or in the guide element 18 storable or stored on.

In the area of the cap element 13 remote end of the guide element 18 is a a bottom section of the pen 1 forming handling element 14 arranged or formed. The handling element 14 is here in one piece with the guide element 18 trained and thus rotationally fixed with the guide element 18 connected.

The operating principle of the mine feed device 8th Provides that in the mine holding element 20 recorded mine 2 over the mine feed device 8th in an axial feed movement in the direction of the cap member side sharpener 10 is displaceable. This is done in such a way that the guide element 18 or with this non-rotatably connected handling element 14 in a rotational movement relative to the receiving part 2 is offset (see. 6 , Arrow P1). To the guide element 18 to put in a rotary motion, engages a user of the pen 1 the guide element 18 or with this non-rotatably connected handling element 14 and rotates it relative to the receiving element 7 and the rotatably connected thereto cap member 13 , The axis of rotation corresponds to the axis of symmetry of the pin 1 or the axis of symmetry of the hollow cylindrical components of the pin 1 ,

By rotation of the guide element 18 becomes the mine holding element 20 due to the rotationally fixed connection with the guide element 18 set in a rectified rotational movement. The mine holding element 20 is now due to the engagement of the on the receiving element 7 formed internal thread with a minenhalteteilseitigen counter guide sections 21 trained external thread in an axial movement, ie depending on the direction of rotation of the guide element 18 or handling element 14 in a feed motion (see. 6 , Arrow P2) in the direction of the cap element-side sharpener device 10 or in a return movement in a direction opposite thereto, displaceable or offset.

As it turned out 6 results, includes the principle of operation of mine feed device 8th in addition, that too the cap element 13 (In addition rotatably arranged or trained Spitzereinrichtung 10 ) together with the cap element 13 rotatably connected receiving element 7 relative to the guide element 18 or the handling element 14 can be twisted (cf. 6 , Arrow P3). For this purpose, the guide element 18 or the handling element 14 and the cap member 13 velcro-proof with the cap element 13 connected receiving element 7 to turn in opposite directions of rotation (cf. 6 , Arrows P1, P3). The respective axis of rotation again corresponds to the axis of symmetry of the pin 1 or the axis of symmetry of the hollow cylindrical components of the pin 1 ,

For that in the 5 . 6 shown embodiment is that there on the receiving element 7 trained internal thread axially considered in principle also at other axial regions of the receiving element 7 can be trained.

For that in the 5 . 6 embodiment shown is further that the receiving element-side internal thread already by a part of an internal thread, ie at least one internal thread flank or a female thread part section, may be formed. The internal thread can, for. B. by at least one (with respect to the symmetry or central axis of the receiving element 7 ) radially inwardly directed, in particular nose-like, projection may be formed. The same applies to the mineral retaining element-side external thread, ie, this too can already be formed by a part of an external thread pitch, ie at least one external thread flank or one outer thread subsection.

LIST OF REFERENCE NUMBERS

1

 pen

2

 mine

3

 Mine body

4

 casing member

5

 Spitzer element

6

 mine tip

7

 receiving element

8th

 Mine feeder

9

 actuator

10

 Tip device

11

 receiving portion

12

 approach

14

 handling element

13

 cap member

15

 Form-fitting element

16

 Against interlocking element

17

 coupling element

18

 guide element

19

 guide section

20

 Mine retaining element

21

 Against guide section

22

 Form-fitting element

23

 Against interlocking element

Claims (19)

Pen ( 1 ), comprising a mine ( 2 ) and a sheathing element covering the same at least in sections ( 4 ), characterized in that the sheath element ( 4 ) is formed at least in sections, in particular completely, from a waxy material. Pin according to claim 1, characterized in that the sheath element ( 4 ) by a made of a plastic or a non-hardened metal, in particular a non-hardened steel, formed, in particular blade or blade-shaped, pointed element ( 5 ) a spiked device ( 10 ) can be torn or sharpened. A pencil according to claim 1 or 2, characterized in that the waxy material is formed exclusively of at least one waxy constituent or the waxy material is formed of at least one waxy constituent and at least one non-waxy constituent. A pencil according to claim 3, characterized in that the wax-like constituent is formed from at least one natural, in particular vegetable and / or animal and / or geological, wax and / or at least one synthetic wax. A pen according to claim 4, characterized in that the waxy constituent is formed from a natural wax, wherein the natural wax is formed from natural hydrocarbon compounds or contains natural hydrocarbon compounds. A pencil according to claim 5, characterized in that the natural wax is formed from at least one natural wax of the following group or contains at least one natural wax of the following group: beeswax, candelilla wax, carnauba wax, china wax, japan wax, spermaceti, wool wax, sugarcane wax, montan wax, earth wax. A pen according to claim 4, characterized in that the waxy component is formed from at least one synthetic wax, wherein the synthetic wax is formed from synthetic hydrocarbon compounds or contains synthetic hydrocarbon compounds. A pencil according to claim 7, characterized in that the synthetic wax is formed from at least one aliphatic wax, in particular based on paraffin, polyethylene or polypropylene, or contains at least one aliphatic wax, in particular based on paraffin, polyethylene or polypropylene. A stick according to claim 3, characterized in that the waxy constituent is formed from at least one ester compound, in particular at least one fatty acid ester compound, or at least one salt of a fatty acid ester compound. Pen according to one of claims 3 to 9, characterized in that the non-waxy ingredient from a particular polyolefinic thermoplastic material is formed. Pin according to one of the preceding claims, characterized in that the sheath element ( 4 ) a higher mechanical stability, in particular a higher dimensional stability or dimensional stability and / or a higher hardness, than the mine ( 2 ) having. Pen according to one of the preceding claims, characterized in that the mine ( 2 ) is formed from or comprises at least one waxy material, whereby the waxy material of the mine ( 2 ) and the waxy material of the sheath element ( 4 ) in their chemical properties and / or in their structural, in particular mechanical, properties. Pen according to claim 12, characterized in that the mine ( 2 ) and the Sheathing element ( 4 ), in particular in one piece, are formed from the same waxy material, wherein the sheathing element ( 4 ) due to at least one measure carried out in the region of its surface to increase the mechanical stability, in particular the dimensional stability or dimensional stability and / or hardness, in particular a treatment with high-energy radiation, a higher mechanical stability, in particular a higher dimensional stability or dimensional stability and / or a higher hardness than the mine ( 2 ) having. Pin according to one of the preceding claims, characterized in that the sheath element ( 4 ) has a diffusion barrier opposite the mine ( 2 ) contained volatile constituents of the mine ( 2 ). Pin according to one of the preceding claims, characterized in that the sheath element ( 4 ) with volatile constituents of the mine ( 2 ) or these chemically similar volatiles are saturated or supersaturated. Pen according to one of the preceding claims, characterized in that the mine ( 2 ) has an elongated geometric shape, wherein the sheath element ( 4 ) the mine ( 2 ) either only in the region of its longitudinal side at least partially encased or the sheathing element ( 4 ) the mine ( 2 ) in the region of its longitudinal side at least partially encased and in the region of at least one free end, optionally both free ends of the mine ( 2 ) sheathed. Pen according to one of the preceding claims, characterized by a receiving element ( 7 ) for receiving the mine ( 2 ), the mine ( 2 ) at least in sections in the receiving element ( 7 ) is recorded. A pen according to claim 17, characterized by a lead advancing device ( 8th ), which is adapted to be in the receiving element ( 7 ) recorded mine ( 2 ) in a movement relative to the receiving element ( 7 ) to move. Mine ( 2 ) for a pen ( 1 ), especially for a pen ( 1 ) according to any one of the preceding claims, wherein the mine ( 2 ) at least in sections with a sheath element ( 4 ) is sheathed, characterized in that the sheath element ( 4 ) is formed at least in sections, in particular completely, from a waxy material.

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