US3586454A - Penpoint structure of writing implements - Google Patents

Penpoint structure of writing implements Download PDF

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Publication number
US3586454A
US3586454A US877666A US87766669A US3586454A US 3586454 A US3586454 A US 3586454A US 877666 A US877666 A US 877666A US 87766669 A US87766669 A US 87766669A US 3586454 A US3586454 A US 3586454A
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US
United States
Prior art keywords
core elements
penpoint
sheath means
core
bundle
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
US877666A
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English (en)
Inventor
Takaji Funahashi
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Individual
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Individual
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Publication date
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Publication of US3586454A publication Critical patent/US3586454A/en
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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
    • Y10T428/2931—Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.]

Definitions

  • This invention relates to an improved structure of the point of a writing pen such as a standard felt-containing pen or a marking pen, whereby ink contained in a stern can be sucked up spontaneously in response to the capillary action of the penpoint to facilitate the desired writing performance.
  • an improved penpoint structure comprising a plurality of core elements made of wear-resistant and inkproof synthetic resin material, each of said core elements being gear shaped in transverse section by having a plurality of spaced ridges formed about its peripheral surface and extending along the full axial length thereof, a fine tubular bore opening being formed in the center of each of said core elements and the plurality of core elements being aggregated or combined together to form an element bundle of substantially columnar shape.
  • this bundle of core elements is coated with a readily meltable liquid synthetic resin of the same material as said core elements by means of an extruder or other suitable means to thereby mold a sheath, a plurality of fine spaces being formed at the boundary between said sheath and core elements as well as between said core elements themselves, and the tip of said core element assembly being shaped into a penpoint.
  • an object of the present invention is to provide an improved writing penpoint structure which is generally solid and rigid construction, has sufficient point" hardness and is strongly resistive against deformation which may be caused by external pressure applied during writing.
  • Another object of the present invention is to provide an improved writing penpoint structure which is substantially wearresistant and is therefore not broadened during writing and which eliminates any partial clogging of the fine tubular bore openings of the core elements and of the small spaces formed between the sheath and core elements as well as between adjoining core elements through capillary action, thereby facilitating the constant smooth flow of ink.
  • Still another object of the present invention is to provide a penpoint structure of the type described which may also be used for a marking pen.
  • FIG. I is a partially cutaway perspective view of the penpoint structure according to the present invention.
  • FIG. 3 is a partially cutaway perspective view of a core element according to the present invention.
  • the present invention is characterized by providing a plurality of core elements 3, each made of wear-resistant and inkproof synthetic resin material such as for example polyacetal resin, polyamide resin, polypropylene resin or polyethylene resin.
  • Each of said core elements is generally gear shaped in transverse section and has a plurality of spaced ridges 1 formed about it periphery so as to extend along the full axial length thereof, and with a fine tubular bore opening 2 being formed in the center of each element and extending axially therethrough.
  • the core elements 3 are all combined or aggregated into a substantially columnar bundle of adjacent core elements and then the entire exposed outer peripheral surface of this columnar core element bundle is coated with a readily meltable liquid synthetic resin of the same material as said core elements so as to thereby mold a sheath 4 about the core elements, with a plurality of spaces 5 being formed at the boundary between the sheath 4 and the bundle of core elements 3, as well as between adjoining core elements.
  • the tip of the elongated combined penpoint stem structure 6, may be shaped by a grinder or other means into a substantially conical configuration so as to thereby form a penpoint 7.
  • Reference number 8 in FIG. 1 denotes a conical portion which may be optionally formed, if desired, at the distal end of the elongated stem structure, opposite that of penpoint 7 so that, in use, the stem structure area which is contacted by ink may be enlarged in order to enhance the positive suction of ink.
  • the penpoint structure is inserted into the pen rearwardly through an end opening in the neck of the pen such that the rear end portion 8 of the sheathed structure 4 contacts an ink source housed in the penholder contiguous to said neck portion, whereby ink is conveyed toward the conical penpoint portion 7 at the other end of the stern structure through the spaces 5 formed between the plurality of ridges 1 provided on the peripheral surface of each core element 3 along the axial length thereof, as well as through the spaces 5 at the boundary between said core elements 3 and the sheath 4 covering said elements, and also through the fine tubular bore openings 2 formed in said elongated core elements 3. Consequently the tip of the penpoint 7 is always supplied with a suitable amount of ink which will assure superior writing performance.
  • EXAMPLE ln manufacturing a penpoint structure according to the present invention seven pieces of the elongated core elements 3, each of which has been previously prepared from polyacetal resin by molding it with an extruder into an elongated structure which is gearshaped in transverse section and each of which hasla length of 50 to meters and a central bore of about 0.1 mm., are aggregated into a bunch of elements having a columnar shape and the entire peripheral surface thereof is coated with a film of readily meltable synthetic resin of the same type as used in forming the core elements, so as to thereby f rm an elongated sheathed structure.
  • Each of the gear-sectioned core elements preferably has an outer diameter of about 0.4 mm. and a root diameter of about 0.3 mm. across the ridges.
  • the present invention has eliminated most of the disadvantages encountered in conventional penpoint devices for this type of writing implements and should therefore be highly economical for its practical utility.
  • a penpoint structure for a writing or marking pen and the like comprising; a plurality of elongated core elements formed from an essentially wear-resistant, inkproof synthetic resin material, said core elements each having a plurality of peripherally spaced ridges extending axially along substantially the full length thereof so as to define a gear-shaped configuration in transverse section, a small tubular bore opening extending axially through the center of each of said core elements, said plurality of core elements being positioned in a columnar bundle of adjacent core elements, and a sheath means encompassing said bundle of core elements to form a sheathed structure having a plurality of small spaces formed at the boundaries between said sheath means and said core elements and between adjoining core elements, said sheath means comprising a readily meltable resin material of generally the same composition as that of the core elements and adapted to be coated in liquid form on to the entire exposed peripheral surface of said bundle of core elements so as to form said sheath means, and at least one end tip portion of said assembled sheathed structure

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  • Pens And Brushes (AREA)
US877666A 1969-07-19 1969-11-18 Penpoint structure of writing implements Expired - Lifetime US3586454A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1969068633U JPS4921614Y1 (xx) 1969-07-19 1969-07-19

Publications (1)

Publication Number Publication Date
US3586454A true US3586454A (en) 1971-06-22

Family

ID=13379324

Family Applications (1)

Application Number Title Priority Date Filing Date
US877666A Expired - Lifetime US3586454A (en) 1969-07-19 1969-11-18 Penpoint structure of writing implements

Country Status (6)

Country Link
US (1) US3586454A (xx)
JP (1) JPS4921614Y1 (xx)
DE (2) DE6946259U (xx)
FR (1) FR2056095A5 (xx)
GB (1) GB1276716A (xx)
SE (1) SE347693B (xx)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729270A (en) * 1970-09-19 1973-04-24 Tsukasa Felt Shoji Kk Writing nib
JPS5096332A (xx) * 1973-12-26 1975-07-31
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
JPS5465628A (en) * 1977-11-04 1979-05-26 Yoshito Kiriyuu Pen point and making method thereof
US4221493A (en) * 1977-08-31 1980-09-09 Scripto, Inc. Pen nibs
US4229115A (en) * 1979-02-12 1980-10-21 Binney & Smith, Inc. Nib for a writing instrument
US4310259A (en) * 1973-11-19 1982-01-12 Pilot Man-Nen-Hitsu Kabushiki Kaisha Capillary nibs for inscribing instruments
US5727893A (en) * 1995-04-21 1998-03-17 Binney & Smith Inc. Fluid dispensing NIB, and delivery system
US20030054300A1 (en) * 2001-09-15 2003-03-20 Castaldi Marco J. Apparatus having similar interstitial passages
US10455919B2 (en) * 2014-10-16 2019-10-29 Kuretake Co., Ltd. Pen and pen refill having a longitudinally extending groove for transferring decorative particles

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729270A (en) * 1970-09-19 1973-04-24 Tsukasa Felt Shoji Kk Writing nib
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
US4310259A (en) * 1973-11-19 1982-01-12 Pilot Man-Nen-Hitsu Kabushiki Kaisha Capillary nibs for inscribing instruments
US4547244A (en) * 1973-11-19 1985-10-15 Pilot Man-Nen-Hitsu Kabushiki Kaisha Method for producing capillary nibs for inscribing instruments
US4410384A (en) * 1973-11-19 1983-10-18 Pilot Man-Nen-Hitsu Kabushiki Kaisha Method for producing capillary nibs for inscribing instruments
JPS5096332A (xx) * 1973-12-26 1975-07-31
US4051287A (en) * 1974-12-12 1977-09-27 Teijin Limited Raised woven or knitted fabric and process for producing the same
US4221493A (en) * 1977-08-31 1980-09-09 Scripto, Inc. Pen nibs
JPS5518639B2 (xx) * 1977-11-04 1980-05-20
JPS5465628A (en) * 1977-11-04 1979-05-26 Yoshito Kiriyuu Pen point and making method thereof
US4229115A (en) * 1979-02-12 1980-10-21 Binney & Smith, Inc. Nib for a writing instrument
US5727893A (en) * 1995-04-21 1998-03-17 Binney & Smith Inc. Fluid dispensing NIB, and delivery system
US20030054300A1 (en) * 2001-09-15 2003-03-20 Castaldi Marco J. Apparatus having similar interstitial passages
US10455919B2 (en) * 2014-10-16 2019-10-29 Kuretake Co., Ltd. Pen and pen refill having a longitudinally extending groove for transferring decorative particles

Also Published As

Publication number Publication date
DE1959871A1 (de) 1971-02-04
JPS4921614Y1 (xx) 1974-06-10
FR2056095A5 (xx) 1971-05-14
SE347693B (xx) 1972-08-14
GB1276716A (en) 1972-06-07
DE6946259U (de) 1970-09-17

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