WO2005028213A2 - Procede de fabrication d'un crayon et crayon - Google Patents

Procede de fabrication d'un crayon et crayon Download PDF

Info

Publication number
WO2005028213A2
WO2005028213A2 PCT/BR2004/000055 BR2004000055W WO2005028213A2 WO 2005028213 A2 WO2005028213 A2 WO 2005028213A2 BR 2004000055 W BR2004000055 W BR 2004000055W WO 2005028213 A2 WO2005028213 A2 WO 2005028213A2
Authority
WO
WIPO (PCT)
Prior art keywords
pencil
grooves
axial direction
depth
centers
Prior art date
Application number
PCT/BR2004/000055
Other languages
English (en)
Other versions
WO2005028213A3 (fr
Inventor
Harald Schiefnetter
Original Assignee
A.W. Faber-Castell S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by A.W. Faber-Castell S.A. filed Critical A.W. Faber-Castell S.A.
Publication of WO2005028213A2 publication Critical patent/WO2005028213A2/fr
Publication of WO2005028213A3 publication Critical patent/WO2005028213A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/008—Holders comprising finger grips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
    • B43K19/02—Pencils with graphite; Coloured pencils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
    • B43K19/16—Making non-propelling pencils

Definitions

  • the present invention relates to a method of manufacturing pencils comprising a lateral wall and a longitudinal axis, and to a pencil, wherein the pencil has side recesses to improve its grip.
  • Description of the Prior Art Pencils having relief elements on their lateral surface to improve the grip are known since long ago.
  • US Pat. D 294,281 illustrates a pencil with circular cross-section, having elliptical grooves on only one of its sides. Due to their shape, these grooves apparently need to be produced by machining and the chips have to be removed by a removal process.
  • US Pat. D 141 ,631 illustrates a hexagonal pencil with elliptical grooves produced at the edges of two adjacent plane faces.
  • the groove is longer in the direction of the pencil axis and visibly has a relatively large depth with respect to the pencil thickness.
  • the grip of these pencils is favored by the grooves, the excessive unevenness on the surface of the pencils produces some discomfort for the user, especially in the case of prolonged use.
  • Another alternative to improve the grip of a pencil is disclosed in
  • the present invention has the objective of providing a method of producing a pencil of the type mentioned in the beginning, which is simple and provides a pencil with a good grip and prevents discomfort for the user, and further a pencil having characteristics that achieve this objective.
  • This objective is achieved by means of a method in which a pencil is subjected to a step of shaping grooves, the grooves being produced at the side wall of the pencil by pressing, without removing material.
  • the shaping if achieved by thermoimprinting, which is a process already used for making engravings on pencils, for instance its trademark.
  • thermoimprinting which is a process already used for making engravings on pencils, for instance its trademark.
  • This objective is also achieved by means of a pencil with grooves arranged elongate in the transverse direction of the pencil, having a depth equal to or smaller than 0.5 mm, a height in the axial direction of the pencil equal to or smaller than 2.00 mm and an axial spacing between the centers of the grooves equal to or smaller than 5.0 mm.
  • - Figure 1 is a side view of a pencil according to the present invention
  • - Figure 2 is an enlarged view of a partial section in the axial direction of the pencil, illustrating the profile of the grooves
  • - Figure 3 is an enlarged cross-sectional view showing the profile of the groove in the transverse direction.
  • the grooves that help in gripping the pencil have an elliptical shape, elongated in the transverse direction of the pencil.
  • an efficient and comfortable grip is ensured by the fact that the grooves have a shallow depth, in addition to small dimensions on the plane of the pencil wall and a reduced spacing between the grooves.
  • the preferred dimensions of the grooves are the following: - Depth P ⁇ 0.5 mm, preferably about 0.32 mm; - Height (in the axial direction of the pencil) H 2.mm, prefera- bly about 0.5 mm; - Distance between the centers of the grooves (in the axial direction of the pencil) D ⁇ 5 mm, preferably about 3.5 mm.
  • the width L is of about 4 mm in the example illustrated, because this is a pencil with a hexagonal cross-section. However, the width may vary depending upon the shape of the pencil and upon the corresponding dimension of its side face, and may also have other shapes in addition to the elliptical one.
  • the bottom of the groove may further have a radius R of approximately 1.5 mm.
  • the dimension P' indicates an optional recess of the ellipsis within the whole wood and may vary from 0.00 to 0.20 mm.
  • the grooves are obtained by shaping, especially by simple pressing or by thermoimprinting. Once the pencil has been completed by the conventional process, one applies the shaping process to produce the grooves, so that the process of manufacturing the pencil will be little affected by the introduction of this characteristic. In particular, when the thermoimprinting process is already used for engraving the trademark or other visual characters onto the pencil, the invention proposes increasing the use of this same process for producing the grooves that will improve the grip conditions.
  • Thermoimprinting basically consists in applying a kind of heated stamp pressing a colored strip onto the surface of the wood.
  • a preferred embodiment consists in causing the pressing of the grooves and the application of the color to be made simultaneously by the thermoimprinting process.
  • a pencil is painted or lacquered with a coating, and the shaping is effected by the thermoimprinting process, one may apply a color onto the bottom of the grooves, and this color may be different from the color of the coating.
  • the different color has the function of highlighting / enhancing the ergonomic function.
  • a pencil having multiple faces as the example illustrated in the figures, one may apply colors different from each other.
  • the paint, lacquer or coating applied onto the bottom of the grooves has a texture and/or friction coefficient such that favor the grip.
  • the cross-section of the pencil may be any other than that illustrated, including but, not limited thereto, a circular, square or triangular cross-section.

Landscapes

  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un crayon qui permet une meilleure prise en main du crayon et prévient toute sensation de gêne due à une surface trop irrégulière; selon l'invention, on applique à un crayon fini une opération de formation mécanique de rainures, ces dernières étant pratiquées sur la paroi latérale du crayon sans que du matériau soit enlevé. L'invention porte aussi sur un crayon (1), à la surface duquel on a réalisé des encoches elliptiques qui s'étendent dans une direction transversale du crayon.
PCT/BR2004/000055 2003-09-19 2004-04-16 Procede de fabrication d'un crayon et crayon WO2005028213A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR0304184A BR0304184A (pt) 2003-09-19 2003-09-19 Processo de fabricação de lápis e lápis
BRPI0304184-0 2003-09-19

Publications (2)

Publication Number Publication Date
WO2005028213A2 true WO2005028213A2 (fr) 2005-03-31
WO2005028213A3 WO2005028213A3 (fr) 2005-05-06

Family

ID=34318716

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2004/000055 WO2005028213A2 (fr) 2003-09-19 2004-04-16 Procede de fabrication d'un crayon et crayon

Country Status (4)

Country Link
AR (1) AR046527A1 (fr)
BR (1) BR0304184A (fr)
PA (1) PA8612901A1 (fr)
WO (1) WO2005028213A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009100939A1 (fr) * 2008-02-14 2009-08-20 Johann Froescheis Lyra-Bleistift-Fabrik Gmbh & Co. Kg Crayon
CN104589842A (zh) * 2014-12-18 2015-05-06 庆元县金泰文具有限公司 铅笔、铅笔加工方法及其加工铅笔的铅笔磨槽机
CN107529496A (zh) * 2017-08-11 2018-01-02 浙江艾特佳文化用品有限公司 洞洞笔

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29603705U1 (de) * 1996-02-29 1996-04-25 Burger Kunststoff Spritzguswer Handschreibgerät
DE29923427U1 (de) * 1999-01-29 2000-09-28 Faber Castell A W Stift
WO2000068023A1 (fr) * 1999-05-07 2000-11-16 A.W.Faber-Castell Unternehmensverwaltung Gmbh & Co. Crayon a gaine de bois pour ecrire, colorier, dessiner ainsi que pour un usage cosmetique
EP1167069A1 (fr) * 2000-06-22 2002-01-02 KOTOBUKI & CO., LTD. Poignée de préhension et corps pour instrument d'écriture
EP1177917A1 (fr) * 2000-08-02 2002-02-06 Lucia Franceschi Stylo avec un corps en plastique muni d'une zone de préhension améliorée
DE10154719A1 (de) * 2000-11-10 2002-06-27 Berol Corp Schreibgerät

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29603705U1 (de) * 1996-02-29 1996-04-25 Burger Kunststoff Spritzguswer Handschreibgerät
DE29923427U1 (de) * 1999-01-29 2000-09-28 Faber Castell A W Stift
WO2000068023A1 (fr) * 1999-05-07 2000-11-16 A.W.Faber-Castell Unternehmensverwaltung Gmbh & Co. Crayon a gaine de bois pour ecrire, colorier, dessiner ainsi que pour un usage cosmetique
EP1167069A1 (fr) * 2000-06-22 2002-01-02 KOTOBUKI & CO., LTD. Poignée de préhension et corps pour instrument d'écriture
EP1177917A1 (fr) * 2000-08-02 2002-02-06 Lucia Franceschi Stylo avec un corps en plastique muni d'une zone de préhension améliorée
DE10154719A1 (de) * 2000-11-10 2002-06-27 Berol Corp Schreibgerät

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009100939A1 (fr) * 2008-02-14 2009-08-20 Johann Froescheis Lyra-Bleistift-Fabrik Gmbh & Co. Kg Crayon
CN104589842A (zh) * 2014-12-18 2015-05-06 庆元县金泰文具有限公司 铅笔、铅笔加工方法及其加工铅笔的铅笔磨槽机
CN107529496A (zh) * 2017-08-11 2018-01-02 浙江艾特佳文化用品有限公司 洞洞笔

Also Published As

Publication number Publication date
PA8612901A1 (es) 2005-03-28
WO2005028213A3 (fr) 2005-05-06
AR046527A1 (es) 2005-12-14
BR0304184A (pt) 2005-05-10

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