EP0368969B1 - Schreibspitze für kugelschreiber - Google Patents

Schreibspitze für kugelschreiber Download PDF

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Publication number
EP0368969B1
EP0368969B1 EP89905642A EP89905642A EP0368969B1 EP 0368969 B1 EP0368969 B1 EP 0368969B1 EP 89905642 A EP89905642 A EP 89905642A EP 89905642 A EP89905642 A EP 89905642A EP 0368969 B1 EP0368969 B1 EP 0368969B1
Authority
EP
European Patent Office
Prior art keywords
writing tip
writing
tip according
feed
ball
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.)
Expired - Lifetime
Application number
EP89905642A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0368969A1 (de
Inventor
Horst Elsner
Horst HÜLSENBECK
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.)
JS Staedtler GmbH and Co KG
Original Assignee
JS Staedtler GmbH and Co KG
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 JS Staedtler GmbH and Co KG filed Critical JS Staedtler GmbH and Co KG
Publication of EP0368969A1 publication Critical patent/EP0368969A1/de
Application granted granted Critical
Publication of EP0368969B1 publication Critical patent/EP0368969B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B43K1/00—Nibs; Writing-points
    • B43K1/08—Nibs; Writing-points with ball points; Balls or ball beds
    • B43K1/084—Ball beds

Definitions

  • the invention relates to a writing tip for ballpoint pens with a ball receiving bore for a writing ball incorporated into the syringe housing, a circumferential support surface inclined to a central feed bore and arranged between the latter and the receiving bore, with feed channels opening into the central feed bore and into the support surface and having spherically shaped, support zones adapted to the sphere.
  • DE-OS 20 34 274 shows a receiving bore with a support surface which runs around a central ink feed bore and is pierced by several ink feed channels.
  • a circumferential support zone is incorporated in such a way that its individual components, which are located on the sections lying between the feed channels, touch over the feed channels and cover them telephoto to the writing ball.
  • This structure has several disadvantages. On the one hand, the overall contact area between the ball and the support zones is relatively large, which leads to a corresponding rolling resistance for the ball. On the other hand, due to the partial covering of the feed channels with respect to the ball, the flow of writing medium can easily be torn off, which leads to misfires since the lubrication caused by the writing medium is eliminated.
  • a writing tip for ballpoint pens is known from US Pat. No. 3,166,618, in which the support zones are located on raised areas which are attached to a circumferential support surface and which form paste feeds between them. Here the rolling resistance of the support zones to the ball is lower.
  • a disadvantage of this construction is that the intermediate surfaces, which are located between the support zones and the support surface, drop relatively steeply from the spherical support zone and therefore away from the spherical surface.
  • the transition between the relatively low-capillary zone of the feed bore and the feeds, as well as the support zones forming the ball seat, which act highly capillary is very abrupt, which also has a negative effect on the writing behavior and the lubricating behavior.
  • the object of the invention is therefore to provide a writing tip for ballpoint pens and to design such that a low rolling resistance between the support zones and the writing ball is combined with optimal lubrication of this area, so that good writing behavior without misfires and dry running of the ball with different writing materials, both paste-like agents, as well as aqueous inks, is achieved.
  • the surface inclination (a) of the circumferential support surface should be 45 to 60 °, preferably 48 to 53 °, in relation to the central axis of the receiving bore.
  • the capillary-increasing intermediate surfaces which, in one embodiment, can be flat, convex or concave, run parallel to the support surface and along two adjacent feed channels, whereby they are inclined towards them.
  • Your peripheral inclination (b) to the axis of the feed channels or to the axis of the feed bore of the writing tip should be between 91 and 105 °, preferably between 92 and 97 °.
  • two intermediate zones which increase capillarity are arranged between the support zones and the feed channels and can partially open into the spherical support zones.
  • an intermediate surface is arranged between two feed channels. This essentially covers the portion of the circumferential support surface in the inner region that is present between the channels.
  • each support zone is surrounded by an intermediate surface on at least three sides.
  • each support zone can be arranged peripherally essentially in the center of an associated intermediate surface and can be radially connected directly to the feed bore.
  • the intermediate surfaces open into constricted channel sections of the feed channels which increase the capillarity.
  • the spherical support zones should have a depth of 0.008 to 0.02 mm.
  • the writing tip shown in FIG. 1 consists of a tip housing and a writing ball 3.
  • a receiving bore 2 for the writing ball 3 to which a central feed hole 4 for the writing medium connects, which runs axially to the rear.
  • the transition from receiving bore 2 and feed bore 4 is formed by a circumferential, inwardly inclined support surface 6.
  • the support surface 6 is interrupted by a plurality of feed channels 5 for the writing medium, which extend axially away from the support surface and open into the feed bore 4, from which they extend radially outwards.
  • the support zones 7, on which the writing ball 3 rests, are located on the supporting surface 6. Towards the front, the writing ball 3 is held in the receiving bore by a holding edge 11.
  • Fig. 2 shows the receiving bore 2 and the feed bore 4 with the between them arranged at an angle a Support surface 6.
  • a plurality of feed channels 5 break through the support surface 6 axially to the rear and open into the feed bore 4.
  • In the front area of the support surface 6 there are 5 support zones 7 between two feed channels 5, which have a spherical shape adapted to the surface of the writing ball 3.
  • the intermediate surfaces 8 'can pass into the support zones 7.
  • FIG. 3 it can be seen how the support surface 6 is interrupted by the supply channels 5, how the support zones 7 are located at the front, towards the feed bore 4, on the support surface 6, the intermediate surfaces 8 'extending in each case between support zones 7 and supply channels 5 . Interfaces 8 'and support zones 7 merge.
  • Fig. 4 shows schematically the sequence of support zone 7, interface 8 'and feed channel 5.
  • the angle b between the interface 8' and the central channel axis 9 of the feed channel 5 should be between 91 ° and 105 °.
  • a narrowed channel section 5 ' can additionally be provided at the transition of the feed channel 5 to the intermediate surfaces 8'.
  • Fig. 5 shows a writing tip A 'with tip housing 1 and ball 3.
  • the tip housing 1 has a receiving bore 2, a central feed bore 4 for the writing medium and in the transition between the receiving bore 2 and feed bore 4, an inner region 6' and an outer region 6 'one
  • the support surface (6) is interrupted by a plurality of feed channels 5 for the writing medium, which open into the feed bore.
  • the writing ball 3 rests on the support zones 7 and is held in this position by a front holding edge 11.
  • the support surface (6) shows the front part of the seat housing 1 with receiving bore 2, feed bore 4 and support surface (6).
  • the support surface (6) has in this embodiment a circumferential outer area 6 ⁇ , which, like the support zone. the first embodiment, is inclined straight inwards.
  • the inner region 6 'of the support surface (6), which directly adjoins the outer region 6 ⁇ , has a spherical, inwardly curved shape.
  • the support surface (6) is pierced by several feed channels 5, which extend axially to the rear and open the feed bore 4.
  • intermediate surfaces 8 ' are arranged on the inner region 6' of the support surface (6) such that they cut through the spherical shape of the inner region 6 'of the support zone (6) as planes, so that there are between the feed channels 5 and at a short distance from these, relative to the inner region 6 'of the support zone (6) raised surfaces, which act as intermediate surfaces 8', which serve to increase the capillarity between the feed channels 5 and the support zones 7 , which are located on the middle of the intermediate surfaces 8 ⁇ , the support zones 7 then being surrounded by three sides of an intermediate surface 8 ⁇ and connected directly to the central feed bore 4 towards the fourth side.
  • This structure results in zones of high capillarity between the writing ball 3 and the intermediate surfaces 8 ′, towards the support zone 7 and thus the contact surface of the writing ball, whereby the writing medium literally exits the supply channels 5 into the highly capillary zone between the writing ball 3 and the supporting zone 7 is sucked. It results from this structure that the writing ball constantly floats on a thin film of writing medium, which does not tear off, as a result of which the writing ball is always well lubricated and therefore has low rolling resistance and good writing behavior due to the small contact surfaces.
  • Also in this second embodiment can advantageously be arranged at the transition of the supply channels 5 to the inner region 6 'of the support surface narrowed channel sections 5', which improve the flow of writing medium from the supply channels 5 into the inner region 6 'of the support surface.
  • Fig. 7 shows how the support surface (6) is divided into an outer 6 ⁇ and an inner region 6 ', wherein it is broken through a total of several feed channels 5.
  • 1, 2, 3, 5, 6 and 7 each show the left half of a writing tip A, A ', in which the ball 3 has not yet been pressed in and crimped, while the right halves of the situation with pressed in Represent ball and crimped nib.

Landscapes

  • Pens And Brushes (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
EP89905642A 1988-06-02 1989-05-25 Schreibspitze für kugelschreiber Expired - Lifetime EP0368969B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818786 1988-06-02
DE3818786A DE3818786C1 (ja) 1988-06-02 1988-06-02

Publications (2)

Publication Number Publication Date
EP0368969A1 EP0368969A1 (de) 1990-05-23
EP0368969B1 true EP0368969B1 (de) 1992-07-29

Family

ID=6355700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89905642A Expired - Lifetime EP0368969B1 (de) 1988-06-02 1989-05-25 Schreibspitze für kugelschreiber

Country Status (5)

Country Link
US (1) US5104249A (ja)
EP (1) EP0368969B1 (ja)
JP (1) JPH02501557A (ja)
DE (2) DE3818786C1 (ja)
WO (1) WO1989011977A1 (ja)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000304A1 (en) * 1992-06-26 1994-01-06 The Gillette Company Ball point pen
US5383901A (en) * 1993-10-18 1995-01-24 Ethicon, Inc. Blunt point needles
JP3492438B2 (ja) * 1995-02-07 2004-02-03 三菱鉛筆株式会社 ボールペン用金属チップ
JP3434975B2 (ja) * 1996-06-03 2003-08-11 三菱鉛筆株式会社 ボールペン
CH691172A5 (fr) * 1996-08-27 2001-05-15 Premec Sa Pointe porte-bille pour stylo à bille.
WO1998030401A1 (fr) * 1997-01-07 1998-07-16 Mitsubishi Pencil Kabushiki Kaisha Stylo a bille
DE602004023078D1 (de) * 2003-05-27 2009-10-22 Sakura Color Prod Corp Verfahren zur herstellung einer applikatorspitze
JP5483911B2 (ja) * 2009-03-11 2014-05-07 三菱鉛筆株式会社 ボールペンチップ、ボールペンリフィル及びボールペン
ES2698221T3 (es) * 2012-03-07 2019-02-01 Pilot Corporation Kk Composición de tinta a base de aceite para bolígrafo y recambio a base de aceite para bolígrafo que utiliza la misma composición
JP6010323B2 (ja) * 2012-04-11 2016-10-19 株式会社パイロットコーポレーション ボールペンレフィル
JP6077374B2 (ja) * 2012-04-27 2017-02-08 株式会社パイロットコーポレーション 油性ボールペンレフィルおよびそれを用いた油性ボールペン
JP7113488B2 (ja) * 2018-02-22 2022-08-05 株式会社トンボ鉛筆 ボールペンチップ及びボールペン

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE394866C (de) * 1922-05-25 1924-04-28 Siemens Schuckertwerke G M B H Quecksilberdampfpumpe
LU28022A1 (ja) * 1943-06-10
AT177350B (de) * 1943-06-10 1954-01-25 Henry George Martin Kugelschreiber
NL73484C (ja) * 1946-05-13
LU28659A1 (ja) * 1946-06-07
GB660784A (en) * 1946-09-05 1951-11-14 Eagle Pencil Co Improvements in or relating to ball point writing instruments
FR1049325A (fr) * 1951-05-09 1953-12-29 Perfectionnement aux stylographes à bille
FR1088078A (fr) * 1953-11-25 1955-03-02 Embout de cartouche de stylographe à bille
NL230254A (ja) * 1957-08-06
NL256433A (ja) * 1959-10-02
DE2034274A1 (de) * 1970-07-10 1972-01-13 Fa. Georg Linz, 8500 Nürnberg Verfahren zur Herstellung eines Kugelschreibers bzw. einer Kungelschreibermine
DE2148970A1 (de) * 1970-09-30 1972-06-15 Global Kogyo Kabushiki Kaisha Kugelschreiber
US4116569A (en) * 1977-02-14 1978-09-26 The Gillette Company Ball holder for a ball-point pen
US4134199A (en) * 1977-09-16 1979-01-16 Modern Mold & Tool Corp. Method for producing ball point pen nibs
CH623780A5 (ja) * 1977-12-19 1981-06-30 Ananda Anlageanst
JPS5614082U (ja) * 1979-07-14 1981-02-06

Also Published As

Publication number Publication date
WO1989011977A1 (en) 1989-12-14
JPH02501557A (ja) 1990-05-31
DE58901948D1 (de) 1992-09-03
EP0368969A1 (de) 1990-05-23
US5104249A (en) 1992-04-14
DE3818786C1 (ja) 1990-03-22

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