[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

US3830576A - Nib for writing instrument - Google Patents

Nib for writing instrument Download PDF

Info

Publication number
US3830576A
US3830576A US00278870A US27887072A US3830576A US 3830576 A US3830576 A US 3830576A US 00278870 A US00278870 A US 00278870A US 27887072 A US27887072 A US 27887072A US 3830576 A US3830576 A US 3830576A
Authority
US
United States
Prior art keywords
subcore
elements
legs
core member
writing
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
US00278870A
Other languages
English (en)
Inventor
T Kohno
T Watanabe
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.)
Pentel Co Ltd
Original Assignee
Pentel 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
Application filed by Pentel Co Ltd filed Critical Pentel Co Ltd
Application granted granted Critical
Publication of US3830576A publication Critical patent/US3830576A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K1/00—Nibs; Writing-points
    • B43K1/003—Capillary nibs

Definitions

  • This invention relates to a nib for writing instruments and more particularly to a writing nib of the type having capillary ink feeding channels through which ink is continuously fed to a writing point from an ink reservoir.
  • Another writing instrument which comprises a star-shaped core member, in cross section, and a plurality of subcore elements each of which has a control opening for effecting the capillary action therethrough.
  • the core member and the subcore elements are enclosed by a thin-walled tubular housing except tapered writing tip portion as described in U.S. Pat. No. 3,604,817.
  • the mono-filaments at the tapered writing tip portion may be separated from each other while using and may catch the writing surface with the result that smooth writing will be disturbed.
  • the mono-filaments caught on the writing surface are freed and recovered to the original state, ink splashes abnormally to spoil the writing surface.
  • the star-shaped core member ' is provided with several legs each of which becomes thinner along the outwardly extending end thereof, a writing point to be contact with a paper surface has a rather large area. Therefore, when the writing nib is so sharpened for writing fine lines, ink will not reach the writing point continuously.
  • an object of the present invention is to provide an improved nib for writing instruments wherein ink flows continuously to its writing point without any dropping, clogging and splashing of ink.
  • Another object of the present invention is to provide an improved nib for writing instruments which allows ink to flow traversely from the center to periphery of the writing nib and reversely when a writing pressure is applied to and eliminated from the writing nib.
  • a nib for writing instruments fundamentally comprises a core member, a plurality of subcore elements, and a tubular shroud enclosing the core member and the subcore elements. All of them are made of synthetic resin such as polyacetal, polyester, or polyamide.
  • the core member has a plurality, of radial legs longitudinally extending with a substantially constant thickness and with equal angles from a center body portion to an end portion thereof.
  • Each of the subcore elements is solid and substantially triangular shaped in section, and has a groove or grooves on each triangular side along the longitudinal direction thereof.
  • the subcore elements having grooves thereon are positioned between the legs to form capillary ink feeding channels therebetween.
  • FIG. 11 is a partially cut away perspective view of a nib for writing instruments according to the present invention.
  • FIGS. 2 and 3 are diagrammatic plane views of different types of subcore elements to be employed in the writing nib according to the present invention.
  • FIGS. 4 through 8 are cross sectioned views of writing nibs according to different embodiments of the present invention.
  • FIG. 9 is a partially cut away perspective view of a nib for writing instrument according to another embodiment of the present invention, showing a plurality of minor grooves formed in parallel on the longitudinal sides of the legs.
  • a core member 1 comprises a plurality of legs 2 radially extending with substantially equal angles which also extend longitudinally.
  • Each of the legs has a substantially constant thickness from a center body portion to an end portion thereof, and is made of synthetic resin such as polyacetal, polyester, or polyamide.
  • the legs may be provided as many as three as shown in FIGS. 1, 4, 5 and 6, or six as shown in FIGS. 7 and 8. Thickness and length of the legs 2 are about 0.05 to 0.3 mm and 0.1 to 1.0 mm, respectively.
  • legs 2 of the embodiments shown in Figures have smooth surfaces on their longitudinal sides, they may be provided with a number of minor grooves to facilitate ink capillary action.
  • legs 2 of the embodiments shown in FIGS. 1 through 8 have smooth surfaces on their longitudinal sides, they may be provided with a number of parallel minor grooves 6, as shown in FIG. 9.
  • Each subcore element 4 made of synthetic resin has a substantially triangular prism shape, on each triangular side of which is provided with groove or grooves along the longitudinal direction thereof.
  • the subcore elements 4 are each positioned between the adjoining legs 2 as shown in FIGS. 7 and 8, and may be preferably positioned in pairs between the adjoining legs as shown in FIGS. 4, 5, and 6.
  • FIGS. 2 and 3 Preferable configurations of the subcore elements 4 are shown in FIGS. 2 and 3.
  • the subcore element in FIG. 2 has one curved groove on its each triangular side, the grooves having ends terminating at apexes of said triangular shape, respectively.
  • the dimensions of each subcore are such that the side A is in the range of from 0.51 to 0.63 mm, the width B of the groove is from 0.25 to 0.45, and the depth of the groove D is from 0.04 to 0.12 mm.
  • the subcore element shown in FIG. 3 has a plurality of wave shaped grooves whose depth is less than 0.04 mm. The most preferable number of the grooves is three as shown in FIG. 3.
  • FIGS. 4, 5, and 6 Preferable examples of combination of the core member I and the subcore elements are shown in FIGS. 4, 5, and 6, in which three legs and three pairs of subcore elements are provided so that each pair of the subcore elements may be snugly positioned between the adjoining legs.
  • FIG. 4 the subcore elements of the type shown in FIG. 2 are employed.
  • FIG. 5 the subcore elements of the type shown in FIG. 3 are employed.
  • FIG. 6 each pair of the subcore elements consisting of a subcore element of the type shown in FIG. 2 and a subcore element of the type shown in FIG. 3 are employed.
  • the arrangement of the subcore elements of a pair shown in FIG. 6 may be changed with each other.
  • FIGS. 7 and 8 each of which has six legs and six subcore elements respectively.
  • FIG. 7 the subcore elements of the type shown in FIG. 2 are employed, while the elements shown in FIG. 3 are employed in the embodiment shown in FIG. 8.
  • a tubular shroud encloses the outer peripheral surfaces of the legs 2 of the core member I and the subcore elements to form an integrally combined body.
  • Ink feeding channels 3 are formed or left between the legs 2 and the subcore elements 1-, between the tubular shroud 5 and the subcore elements 4, and also between adjacent pair of subcore elements 4 when preferable structure of paired subcore elements is employed.
  • the tubular shroud is a thin-walled tubular housing which is as thick as 0.2 to 0.5 mm and is made of synthetic resins such as polyvinyl chloride, polyethelane, or polyasetal.
  • Such materials enclosed by the tubular shroud as described above are cut at predetermined length to form a tapered writing tip portion terminating at a writing point.
  • the center body portion of the core member 1 has a relatively small area at the writing point comparing with the known writing instrument which has the starshaped core member.
  • the cross section of the writing point to be contact with writing surfaces includes parts of the subcore elements adjacent to the center body portion of the core member. Therefore, the capillary ink feeding channels are still formed at the writing point between the center body portion of the core member and the parts of the subcore elements.
  • the capillary ink feeding channels between the relatively rigid core member, the relatively flexible subcore elements and the shroud are somewhat varied to allow the ink to move toward and away from the central body portion of the core member.
  • the capillary ink feeding channels are varied by slight movement of the subcore elements due to flexion thereof, the subcore elements function for cleaning of the capillary channels by themselves so as not to blockade the latter.
  • each side of the legs 2 having a constant thickness holds firmly the subcore elements therebetween. Therefore, ink never splashes even when the tapered tip portion of the subcore elements contacts paper or the like, and smooth writing is insured.
  • a nib structure for a writing instrument comprising a core member having three legs radially extending from the center of said core member, said egs having substantially equal thickness and extending from said center with substantially equal angles, three pairs of subcore elements, each of said subcore elements being solid and substantially triangular shaped in section and having a groove or grooves formed on each triangular side along the longitudinal direction thereof so that each side of the triangular sides of the same subcore element has the same surface shape, and a tubular shroud enclosing outer peripheral surfaces of said legs and said subcore elements, except, at least at the sharpened writing tip portion thereof, said tubular shroud holding said subcore elements to said core member to provide capillary ink feeding channels between said tubular shroud and said grooved outer peripheral surface of said subcore elements, wherein said subcore elements of each pair are snugly disposed side by side between adjoining legs of said core member with capillary ink feeding channels between said legs and the grooved surface of said subcore elements and between the grooved surfaces of said

Landscapes

  • Pens And Brushes (AREA)
US00278870A 1971-08-10 1972-08-08 Nib for writing instrument Expired - Lifetime US3830576A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971071421U JPS5035779Y2 (de) 1971-08-10 1971-08-10

Publications (1)

Publication Number Publication Date
US3830576A true US3830576A (en) 1974-08-20

Family

ID=27969565

Family Applications (1)

Application Number Title Priority Date Filing Date
US00278870A Expired - Lifetime US3830576A (en) 1971-08-10 1972-08-08 Nib for writing instrument

Country Status (7)

Country Link
US (1) US3830576A (de)
JP (1) JPS5035779Y2 (de)
AU (1) AU465893B2 (de)
CA (1) CA970640A (de)
DE (1) DE2239418C3 (de)
FR (1) FR2148564B1 (de)
GB (1) GB1353284A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932044A (en) * 1973-12-06 1976-01-13 Tokyo Boshi Kabushiki Kaisha Pen point for writing instruments
US3933965A (en) * 1973-05-11 1976-01-20 Global Control Corporation Process for the manufacture of rods of thermoplastic material, having internal capillary ducts, for the preparation of pen nibs incorporating capillary ink ducts
US4051287A (en) * 1974-12-12 1977-09-27 Teijin Limited Raised woven or knitted fabric and process for producing the same
US4215948A (en) * 1977-04-07 1980-08-05 Pentel Kabushiki Kaisha Synthetic resin rod with a multiplicity of capillary passages
USRE30659E (en) * 1975-05-15 1981-06-30 Tokyo Boshi Kabushiki Kaisha Pen points for writing instruments
GB2145979A (en) * 1983-08-31 1985-04-11 Pentel Kk Nib for writing instruments
US4764045A (en) * 1986-04-16 1988-08-16 Koh-I-Noor Rapidograph, Inc. Writing instrument with reservoir having perpendicular fibers
US4973182A (en) * 1988-10-08 1990-11-27 Tsukasa Felt Shoji Co., Ltd. Writing nib made of synthetic resin

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52121789U (de) * 1976-03-11 1977-09-16
JPS6027598B2 (ja) * 1979-03-29 1985-06-29 株式会社日本債券信用銀行 ペン先構造体
JPS56135098A (en) * 1980-03-26 1981-10-22 Shizuo Yamanaka Structure of polygonal pen point
JPS57181522U (de) * 1981-05-09 1982-11-17
JPS5878799A (ja) * 1981-11-02 1983-05-12 東京焼結金属株式会社 ペン芯体
JPS6120252U (ja) * 1985-05-09 1986-02-05 明 高山 草刈用丸鋸刃の研磨機
JP2912207B2 (ja) * 1995-12-05 1999-06-28 山中 鎮雄 ペン先

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933965A (en) * 1973-05-11 1976-01-20 Global Control Corporation Process for the manufacture of rods of thermoplastic material, having internal capillary ducts, for the preparation of pen nibs incorporating capillary ink ducts
US3932044A (en) * 1973-12-06 1976-01-13 Tokyo Boshi Kabushiki Kaisha Pen point for writing instruments
US4051287A (en) * 1974-12-12 1977-09-27 Teijin Limited Raised woven or knitted fabric and process for producing the same
USRE30659E (en) * 1975-05-15 1981-06-30 Tokyo Boshi Kabushiki Kaisha Pen points for writing instruments
US4215948A (en) * 1977-04-07 1980-08-05 Pentel Kabushiki Kaisha Synthetic resin rod with a multiplicity of capillary passages
GB2145979A (en) * 1983-08-31 1985-04-11 Pentel Kk Nib for writing instruments
US4764045A (en) * 1986-04-16 1988-08-16 Koh-I-Noor Rapidograph, Inc. Writing instrument with reservoir having perpendicular fibers
US4973182A (en) * 1988-10-08 1990-11-27 Tsukasa Felt Shoji Co., Ltd. Writing nib made of synthetic resin

Also Published As

Publication number Publication date
AU4540372A (en) 1974-02-14
JPS5035779Y2 (de) 1975-10-18
DE2239418B2 (de) 1979-11-15
FR2148564B1 (de) 1976-05-21
DE2239418A1 (de) 1973-02-15
AU465893B2 (en) 1975-10-09
JPS4827029U (de) 1973-04-02
GB1353284A (en) 1974-05-15
CA970640A (en) 1975-07-08
DE2239418C3 (de) 1980-07-31
FR2148564A1 (de) 1973-03-23

Similar Documents

Publication Publication Date Title
US3830576A (en) Nib for writing instrument
US4601598A (en) Finger gripping device
US3520629A (en) Writing instruments
JP7184955B2 (ja) マーキングペン
JPS5847357B2 (ja) 筆記具用ペン体
US3361516A (en) Tracing implements
JPH0228068Y2 (de)
US5820285A (en) Pen nib
US4522525A (en) Writing instrument having a needle slidably mounted in a tubular tip
CN1126970A (zh) 书写用具
JPH0241438B2 (de)
US3510227A (en) Writing instrument
US3718401A (en) Nib and writing instrument construction with capillary action
US4973182A (en) Writing nib made of synthetic resin
US4386867A (en) Multangular pen nib construction
US3729270A (en) Writing nib
US4626120A (en) Resilient writing nib with offset flattened portion
US4603994A (en) Ball-holder of a ball-point pen
JPH03221494A (ja) 毛筆用ペン先
US2289998A (en) Pen
US2393251A (en) Fountain pen
EP0091516B1 (de) Tintenschreiber
JP4706992B2 (ja) 液体供給体及びペン先又はペン用中継芯
JPS641101Y2 (de)
KR200166362Y1 (ko) 녹크식수성볼펜용팁