JP2006205728A - Lead core for writing instrument, draftsman's outfit, and/or drawing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To offer a lead core for writing instruments, draftsman's outfit and/or drawing tools, of which color particles do not break (peel) off and at the same time has visually identifiable information corresponding to the type of the lead core being used. <P>SOLUTION: The lead core of this invention for writing instruments, draftsman's outfit and/or drawing tools has its surface covered with at least one coating and/or at least one partial coating. Further this coating carries the following identifications as its specific information; manufacturer identification mark, hardness identification mark, quality description and lead core size identification mark, etc. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The invention relates to a mine for writing, drawing and / or drawing tools in accordance with the superordinate concept of claim 1.

  Cores for writing, drafting or drawing, or sharp cores are fundamentally known.

In the following, the core means a writing agent, a drawing agent, and / or a drawing agent,
These cores are adhered and fitted in a writing instrument held by wood, i.e., between small pieces of wood board, or
It has previously existed as a separate wick for use in a falling wick writing instrument (Fallminenstifte (wick holder)) or mechanical pencil (Feinminenstift).

From the prior art, baked or unbaked wicks are known and these wicks have previously existed as pencil wicks or colored wicks. In all wicks, it is a disadvantage that friction debris in the form of dust, for example, which produces color, flakes off the surface of this style of wick. For example, graphite dust accumulates inside a mechanical pencil, and in use, it passes forward through the tip of a writing instrument and flows down onto the medium on which characters are to be written. Or in the mechanism of a writing instrument of this style, the functional reliability is no longer guaranteed. For example, the lead feed does not operate in a satisfactory state or the tightening action is reduced.
Similarly, when handling individual wicks, the user's finger is soiled with graphite dust.
In addition, the user is not able to recognize with the naked eye what type of core is being handled here, ie the information about the core thickness, manufacturer, etc. is hidden. Staying in should be considered a disadvantage.
Such a core is known from EP 723 880 (Patent Document 1) and WO 01/43987 (Patent Document 2).
European Patent Application No. 723 880 International Publication No. 01/43987 Pamphlet

  The object of the present invention is therefore to provide information on the style of the core used, which does not have the above-mentioned drawbacks and in particular does not lose color, via visually recognizable features. To provide a wick for writing, drafting or drawing. Furthermore, it is an object of the present invention to achieve an improved cooperation between the core surface and the contact point of the core holder.

This problem is solved with the exemplary features according to claim 1.
Advantageous embodiments are given by the dependent claims.

The core for writing, drafting or drawing is on the one hand a core that is firmly inserted in wood or other pointable material, and on the other hand a position-movable, bending-rigid cover It is understood as a core held within. Examples of these are pencils held on wood, mechanical writing tools, sharp cores for so-called knock-type pencils (Druckbleistifte), and cores for fall-core type writing instruments (Fallstift (core holder)) is there.
In that case, these cores usually have an outer diameter in the range of approximately 0.3 mm to 6 mm.
These wicks are baked wicks and non-baked wicks of various colors.

This challenge is
The core according to the invention is solved by having at least one partial coating on the surface of the core.
Partial coverage is
It is possible to be attached to the surface of this core in parallel to the axis, in a spiral and / or in a ring.
A full or partial coating in the longitudinal direction is advantageous. This is because this coating can be applied during the manufacture of the core.

In this case, what cross-section the whole or partly coated core has is insignificant.
The core cross section can be formed in a circular shape, an oval shape, a triangular shape, a hexagonal shape, a rectangular shape, or in a state of being appropriately shaped.
The overall coating provides the best protection against wear or discoloration. In this case, the coating is configured to be monochromatic or multicolored.
Furthermore, it has been found that the above-described coating does not make any visible and perceptible reduction in the quality of the deletion.
This style of coating does not adversely affect the strength of the core against breakage and / or the tip sharpness of the core, but rather conversely surface defects, for example in the form of notches It became clear that the replenishment, ie, finishing, appeared with a slight improvement in bending fracture strength.

  Next, the idea of the present invention will be described in detail.

  FIG. 1 shows a sharp core 1, which has a covered area 11 and an uncovered area 12. Longitudinal stripes are attached along the longitudinal axis of the sharp core. The drawn stripe can store core hardness, core diameter, or predetermined information about the manufacturer.

  FIG. 2 shows a cross section of the core 1 according to FIG. In this embodiment, the coating is formed so thin in the cross section that the coated and uncoated regions are not apparent and are therefore not indicated even in position.

  FIG. 3 shows a core 1 according to the invention, which core is completely covered, with the core being pointed at the pointed region 13. Here, it should be recognized that in a pointed lead, this covered region 11 does not exist in the deletion zone of the tip region 13 of this lead.

A possible method for coating, for example partial coating of the core, is the “physical vapor deposition” (PVD) method. Here, for example, deposition by ion implantation (Ionenplattieren), deposition by activated reaction, hollow cathode-ion implantation (Hohlkathoden-Ionenplattierung), and plasma active states such as radio frequency sputtering and magnetron sputtering. The deposition deposition process (Dampfabscheidungsprozesse) using the (plasmaaktiver) method is a problem. This method is particularly suitable in this case. This is because the core to be coated has a simple geometric shape. The coating material is based on Al, Cu, TiC and / or titanium.
By this method, a thin metal coating is deposited. These film thicknesses are in the range of 100 to 1000 nm.
Illustratively, a metallic coating having a coating that retains the color of silver, gold, or interference colors is cited.

Further, as another coating method, a CVD method (chemical vapor deposition method) can be exemplified. Coating with a glassy appearance is obtained by deposition of SiOx.
This style of coating does not adversely affect the strength of the core against breakage and / or the sharpness of the lead, but rather confirms an increase in strength against tip breakage. Is done.
With this style of coating, it is called Minenverguetung. This is because the damaged part and / or non-smoothness on the surface is made uniform. These film thicknesses are in this case between 25 and 300 nm.

PVD and CVD methods are particularly utilized for sharp core coating. This is because a thin and precise coating can be obtained as well.
For example, due to the metallic surface coating of the sharp core to be held in a clamp clamping device made of metal, in the mechanical pencil clamping clamp device of a mechanical pencil, compared to the case of a graphite surface, ie an uncoated core. In addition, a remarkably good tightening action can be obtained. In this case, at least one coating and / or at least one partial coating is formed for the color generating surface as a braking coating, a cover coating or a sealing coating.
This coating is specially adapted to the surface of the internal mechanism of the mechanical core holder in order to ensure a reliable core feed and a good core clamping action in this clamping device. It is possible.

  Furthermore, there is the possibility of providing the core with a thin synthetic coating or a lacquer coating. Examples for synthetic materials are PU, PA, and PVA.

The present invention relates to a core for writing tools, drafting tools and / or drawing tools, in which case the surface of the core has at least one coating and / or at least one partial coating. . The core-specific information belongs to the at least one coating and / or at least one partial coating. At this time, the core-specific information includes the manufacturer identification symbol, the hardness identification symbol, and the quality characteristic item. And / or as a line thickness identification symbol.
This at least one coating and / or at least one partial coating. It has a film thickness of 1 to 3000 nm.
The at least one coating and / or at least one partial coating is formed as a metallic coating, wherein the metal is selected from the group of noble metals, copper compounds, titanium compounds, or aluminum compounds; Or it consists of a combination of metal groups in this style.
The at least one partial coating is basically formed in parallel, in a ring shape and / or in a spiral shape.
The at least one coating and / or the at least one partial coating may be configured in ISO standard colors (ISO-Farben).

FIG. 3 is a view of a core having a partial coating. FIG. 2 is a cross-sectional view of the core according to FIG. 1. FIG. 3 is a view of the core according to the invention in a pointed manner.

Explanation of symbols

1 core 11 covered area (drawn in dark color)
12 Uncovered area (drawn in light color)
13 Point area

Claims (7)

In a lead for a writing instrument, a drawing tool, and / or a drawing tool,
A core characterized in that the surface of the core has at least one coating and / or at least one partial coating.   2. Core according to claim 1, characterized in that at least one coating and / or at least one partial coating is associated with one or more core specific information.   The core according to claim 1 or 2, wherein the unique information is configured as a manufacturer identification symbol, a hardness identification symbol, a quality feature, and / or a line thickness identification symbol.   2. Core according to claim 1, characterized in that at least one coating and / or at least one partial coating has a film thickness of 1 to 3000 nm. At least one coating and / or at least one partial coating is a metallic coating; and
The metal is selected from the group of precious metals, copper compounds, titanium compounds, or aluminum compounds, or composed of a combination of metal groups of this style,
The core according to any one of claims 1 to 4, wherein:   6. A core according to any one of the preceding claims, characterized in that at least one partial covering is basically formed in parallel, in a ring shape and / or in a spiral shape.   7. Core according to any one of the preceding claims, characterized in that at least one coating and / or at least one partial coating is constructed in ISO standard colors.

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