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Pencil lead for writing, drawing and painting instruments

A technology for drawing tools and writing tools, applied to writing utensils, pencil leads, household utensils, etc., can solve problems such as high consumption, reduced extrusion efficiency, expensive manufacturing methods, etc., and achieve the effect of reducing production costs and saving costs

Inactive Publication Date: 2006-08-02
STAEDTLER MARS GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the disadvantage is the expensive manufacturing method
An example of this is the very high shear energy that occurs in the extruder due to the flake-like additions in this method, which greatly reduces the extrusion efficiency
Furthermore, a significant disadvantage is that the strength increase achieved in this way is not high enough to justify the production costs
The lead material used or inserted is the same over the entire lead cross-section, which leads to a high consumption of valuable lead material which is necessary only in the writing area or tip area

Method used

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  • Pencil lead for writing, drawing and painting instruments
  • Pencil lead for writing, drawing and painting instruments
  • Pencil lead for writing, drawing and painting instruments

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0037] FIG. 1 shows a clad refill 1 with a refill cladding 2 in longitudinal section, wherein in this embodiment the refill cladding 2 is formed concentrically around the longitudinal axis of a refill core 3 .

[0038] figure 2 The lead or clad lead 1 according to FIG. 1 is shown in cross section. The concentric structure of the cartridge 1 is clearly visible in this view. In this embodiment, the lead core 3 is surrounded by a lead coating 2 .

[0039] image 3 Shown is a clad refill 1 consisting of a refill core 3 and a refill sheath 2, which has a shell 4 consisting of two small wood pieces 41, wherein the clad refill 1 is bonded to these small wood pieces This is known, for example, from typical pencils or markers. The pencil accommodated in wood has a hexagonal outer contour in this embodiment.

[0040] Figure 4 Another embodiment of a coated lead 1' according to the invention is shown. The lead core 3 is surrounded in this embodiment by two lead wraps 2 and 2'. T...

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PUM

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Abstract

The invention relates to a refill for writing implements, drawing implements and painting implements, which has a core core releasing color and at least one refill coating in the direction of the longitudinal axis, wherein, in the cross-section of the refill Viewed in a central view, the at least one refill cladding surrounds the refill core and the refill cladding and the refill core are immovably fixed to each other, wherein the at least one refill cladding has a height higher than the refill core. Flexural breaking strength.

Description

technical field [0001] The invention relates to a refill for writing implements, drawing implements and painting implements, which has a core core releasing color and at least one refill coating in the direction of the longitudinal axis, wherein, in the cross-section of the refill Viewed in a central view, the at least one lead sheath surrounds the lead core and the lead sheath and lead core are fixed immovably to one another. Background technique [0002] Pen refills for writing, drawing or drawing instruments are basically known. [0003] Known writing or drawing refills are generally designed as one-piece refills or chalks and are fixed or movably fixed in a housing. [0004] The prior art is a one-piece, uniformly constructed refill, which is a compromise based on the desired writing properties, which are mainly adjustable via the hardness of the refill and reflect the requirements for this use. Necessary refill strength. If the minimum lead strength is undershot, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43K19/02
CPCB43K19/16C09D13/00B43K19/02B43K19/18Y10T428/2933
Inventor 安德烈亚斯·蒂斯赫丽斯塔·莱雷尔于尔根·赖纳克里斯蒂娜·德拉皮埃尔罗伯特·奈因弗朗茨·奥克斯屈恩马克斯·海因德尔
Owner STAEDTLER MARS GMBH & CO KG