EP0120386A1 - Méthode de fabrication d'un stylo permettant d'écrire dans toutes les directions - Google Patents

Méthode de fabrication d'un stylo permettant d'écrire dans toutes les directions Download PDF

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Publication number
EP0120386A1
EP0120386A1 EP84102682A EP84102682A EP0120386A1 EP 0120386 A1 EP0120386 A1 EP 0120386A1 EP 84102682 A EP84102682 A EP 84102682A EP 84102682 A EP84102682 A EP 84102682A EP 0120386 A1 EP0120386 A1 EP 0120386A1
Authority
EP
European Patent Office
Prior art keywords
pen
point ball
blank
slots
tip
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP84102682A
Other languages
German (de)
English (en)
Inventor
Katuzi Oshita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sailor Pen Co Ltd
Original Assignee
Sailor Pen Co Ltd
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
Priority claimed from JP58051672A external-priority patent/JPS59192598A/ja
Priority claimed from JP58209168A external-priority patent/JPS60101093A/ja
Application filed by Sailor Pen Co Ltd filed Critical Sailor Pen Co Ltd
Publication of EP0120386A1 publication Critical patent/EP0120386A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K15/00—Assembling, finishing, or repairing pens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K1/00—Nibs; Writing-points
    • B43K1/06—Tubular writing-points

Definitions

  • the present invention relates to an improved method for producing a nondirectional pen.
  • a nondirectional pen including three radial blade sections equally an- gurally spaced away from one another and being generally formed into a conical shape with the tip thereof including a pen point ball welded thereto.
  • Such a nondirectional pen is produced by providing three of substantially triangle-shaped plates, bending each of the triangle-shaped plates along the length thereof into a V-shape with an angle of 120 degrees and spot-welding these triangle-shaped bent plates at their back face. This process requires many steps resulting in increased manufacturing cost.
  • the resulting pen has its poor ink-holding ability since the ink is transferred to the tip of the pen along the bottom of the V-shaped groove of the respective bent plate. If the pen is placed without its cap for a very short time, the supply of ink may immediately be stopped.
  • This problem can be solved by providing a particular ink-holding means in the pen. However, this solution adds at least one further working step to the previous working steps.
  • Another object of the present invention is to provide an improved method for producing such a nondirectional pen by the use of a simplified process which is reduced in the number of steps.
  • the method for -producing a nondirectional pen comprises the steps of drawing a solid metal rod to form a pen blank having three or more radial blade sections extending along the length of said pen blank and equally spaced angularly away from one another; cutting said pen blank into pen bodies having a predetermined length; shaping the forward end of each of said pen bodies into a substantially conical configuration; welding a pen point ball to the tip of said pen body; slotting said pen body from its tip to a predetermined depth through said pen point ball to form longitudinal slots each extending from a V-shaped groove defined between each adjacent blade sections to a depth in the corresponding blade section; holding said pen body in such a state that said longitudinal slots are closed and then grinding said pen point ball into a symmetrical shape about the pen point of said pen body; and plastically deforming said pen body such that the slots formed in said pen point ball will be in their closed condition.
  • a pen body provided by drawing a solid rod of stainless steel having a diameter equal to about 4 millimeters and then cutting the drawn rod into a predetermined length.
  • the pen body includes three radial blade sections 1 extending along the length of the pen body and equally angularly spaced away from one another by 120 degrees, the thickness of each of the blade sections being equal to about one millimeter.
  • a V-shaped groove 2 opened through 120 degrees is defined between each adjacent blade sections 1.
  • each of the pen bodies is ground into a substantially conical shape to provide outer arched surfaces la.
  • the tip of the pen body is shaped to provide a semi-spherical recess of about one millimeter diameter.
  • a pen point ball 3 of carbide alloy having the same diameter as that of the semi-spherical recess formed in the tip of the pen body is welded in said recess to provide the outline of the pen.
  • each of the longitudinal slots 4 serves not only as an ink passageway for supplying the ink to the pen point ball 3, but also as means for causing the pen to be flexible to provide a good writing feel and to promote the supply of ink.
  • Each of the longitudinal slots 4 is deeper near the V-shaped groove 2 as shown in Fig. 5 since the ink is transferred to the pen point ball 3 along the V-shaped groove 2.
  • Each of these slots 4 may be of a transverse width in the range of 0.1 to 0.15 millimeters which would provide a poor capillary action and prevent the smooth run of the pen on the paper face. Therefore, the slots 4 will be closed in the final step described below. Under such a condition that all the slots are closed in the final step, the pen point ball 3 does not has its true semi-spherical shape. As. shown in Fig. 6, therefore, the pen body is firmly held as by a chuck with the slots 4 being closed. In this state, the pen point ball and optionally surrounding pen tip portion are ground as by a hard whetstone to provide a symmetrical configuration about the pen tip portion. This ensures that the pen has its nondirectional property.
  • the edges of the slots 4 may have fine burrs at the slotting and grinding steps. It is therefore preferred that when the pen body is firmly held as by a chuck with all the slots being opened as shown in Fig. 4, the edges of the slots 4 are chamferred as by a soft whetstone with a radius of curvature equal to about 0.02 R. This also ensures the smooth run of the pen on the paper face.
  • the pen body is plastically deformed to close the slots 4 as by a press to provide a finished pen.
  • This finished pen is then mounted on a three-pronged pen core with the resulting assembly being mounted in a pen holder to provide a fountain pen.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
EP84102682A 1983-03-29 1984-03-12 Méthode de fabrication d'un stylo permettant d'écrire dans toutes les directions Withdrawn EP0120386A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP58051672A JPS59192598A (ja) 1983-03-29 1983-03-29 無方向ペン体の製造方法
JP51672/83 1983-03-29
JP58209168A JPS60101093A (ja) 1983-11-09 1983-11-09 無方向ペン体の製造方法

Publications (1)

Publication Number Publication Date
EP0120386A1 true EP0120386A1 (fr) 1984-10-03

Family

ID=26392228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102682A Withdrawn EP0120386A1 (fr) 1983-03-29 1984-03-12 Méthode de fabrication d'un stylo permettant d'écrire dans toutes les directions

Country Status (1)

Country Link
EP (1) EP0120386A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821423A1 (de) * 1987-06-26 1989-01-12 Pilot Ink Co Ltd Schreibfederanordnung und diese verwendendes schreibgeraet
GB2213107A (en) * 1987-12-07 1989-08-09 Shizuo Yamanaka Pens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE822509C (de) * 1950-07-06 1951-11-26 Geha Werke Gmbh Schreibroehrchen fuer Tintenfuellhalter
GB2050254A (en) * 1979-03-29 1981-01-07 Yamanaka S Pen nib

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE822509C (de) * 1950-07-06 1951-11-26 Geha Werke Gmbh Schreibroehrchen fuer Tintenfuellhalter
GB2050254A (en) * 1979-03-29 1981-01-07 Yamanaka S Pen nib

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821423A1 (de) * 1987-06-26 1989-01-12 Pilot Ink Co Ltd Schreibfederanordnung und diese verwendendes schreibgeraet
GB2213107A (en) * 1987-12-07 1989-08-09 Shizuo Yamanaka Pens
GB2213107B (en) * 1987-12-07 1992-06-03 Shizuo Yamanaka Multiangular pen

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19850212

17Q First examination report despatched

Effective date: 19860124

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860603

RIN1 Information on inventor provided before grant (corrected)

Inventor name: OSHITA, KATUZI