GB1282390A - Production of ink-feeding and writing core for writing instrument - Google Patents

Production of ink-feeding and writing core for writing instrument

Info

Publication number
GB1282390A
GB1282390A GB4623470A GB4623470A GB1282390A GB 1282390 A GB1282390 A GB 1282390A GB 4623470 A GB4623470 A GB 4623470A GB 4623470 A GB4623470 A GB 4623470A GB 1282390 A GB1282390 A GB 1282390A
Authority
GB
United Kingdom
Prior art keywords
writing
ink
mould
feeding
core
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
Application number
GB4623470A
Inventor
Shinsuke Yoshikawa
Shuji Terasaki
Hiroyuki Endo
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.)
Kureha Corp
Original Assignee
Kureha Corp
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 JP44077385A external-priority patent/JPS4820418B1/ja
Priority claimed from JP7995469A external-priority patent/JPS4932969B1/ja
Priority claimed from JP44079955A external-priority patent/JPS492131B1/ja
Priority claimed from JP4326270A external-priority patent/JPS5031047B1/ja
Application filed by Kureha Corp filed Critical Kureha Corp
Publication of GB1282390A publication Critical patent/GB1282390A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K1/00—Nibs; Writing-points
    • B43K1/006—Porous nibs

Landscapes

  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

1282390 Polyvinylidene fluoride pen cores KUREHA KAGAKU KOGYO KK 29 Sept 1970 [30 Sept 1969 8 Oct 1969 (2) 22 May 1970] 46234/70 Heading B5A The ink-feeding and writing core of a writing instrument is produced from polyvinylidene fluoride powder of particle size 10-300 Á and of bulk density 0À5-1À0 g./ml. and inherent viscosity at least 0À8 (measured in 4 g./l. solution of dimethyl formamide) by heating it in a metal mould at a temperature between the melting point of the polymer and 350‹ C. without application of external pressure, cooling and solidifying, removing it from the mould and then heating at a temperature between 70‹ C. and the melting point for at least 3 hours. It is preferably pre-heated before charging into the mould. The pen core produced is porous and has a uniform void distribution.
GB4623470A 1969-09-30 1970-09-29 Production of ink-feeding and writing core for writing instrument Expired GB1282390A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP44077385A JPS4820418B1 (en) 1969-09-30 1969-09-30
JP7995469A JPS4932969B1 (en) 1969-10-08 1969-10-08
JP44079955A JPS492131B1 (en) 1969-10-08 1969-10-08
JP4326270A JPS5031047B1 (en) 1970-05-22 1970-05-22

Publications (1)

Publication Number Publication Date
GB1282390A true GB1282390A (en) 1972-07-19

Family

ID=27461347

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4623470A Expired GB1282390A (en) 1969-09-30 1970-09-29 Production of ink-feeding and writing core for writing instrument

Country Status (3)

Country Link
DE (1) DE2047567A1 (en)
FR (1) FR2062775A5 (en)
GB (1) GB1282390A (en)

Also Published As

Publication number Publication date
DE2047567B2 (en) 1973-10-11
DE2047567C3 (en) 1974-05-02
DE2047567A1 (en) 1971-04-15
FR2062775A5 (en) 1971-06-25

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee