GB1088681A - Composite porous material and process of making the same - Google Patents

Composite porous material and process of making the same

Info

Publication number
GB1088681A
GB1088681A GB2325265A GB2325265A GB1088681A GB 1088681 A GB1088681 A GB 1088681A GB 2325265 A GB2325265 A GB 2325265A GB 2325265 A GB2325265 A GB 2325265A GB 1088681 A GB1088681 A GB 1088681A
Authority
GB
United Kingdom
Prior art keywords
rubber
die
portions
water
vulcanizing
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
GB2325265A
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.)
TAKAJI FUNAHASHI
Original Assignee
TAKAJI FUNAHASHI
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 TAKAJI FUNAHASHI filed Critical TAKAJI FUNAHASHI
Priority to GB2325265A priority Critical patent/GB1088681A/en
Publication of GB1088681A publication Critical patent/GB1088681A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41K—STAMPS; STAMPING OR NUMBERING APPARATUS OR DEVICES
    • B41K1/00—Portable hand-operated devices without means for supporting or locating the articles to be stamped, i.e. hand stamps; Inking devices or other accessories therefor
    • B41K1/36—Details
    • B41K1/38—Inking devices; Stamping surfaces
    • B41K1/50—Stamping surfaces impregnated with ink, or made of material leaving a mark after stamping contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C3/00—Reproduction or duplicating of printing formes
    • B41C3/04—Reproduction or duplicating of printing formes to produce rubber printing blocks

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

A porous rubber material composed of two integral portions, each portion having a different porosity, is produced by preparing one portion from an unvulcanized raw rubber, chemicals to vulcanize the rubber, a foaming agent which decomposes at 150 DEG to 160 DEG C. to form discrete fine bubbles and a powdered water-soluble salt not decomposed at the vulcanizing temperaure and a second portion from raw rubber and vulcanizing agents, and three foaming agents decomposing at 60 DEG to 90 DEG C., 100 DEG to 110 DEG C. and 130 DEG to 160 DEG C. respectively and a leachable salt as above, putting the two portions succesively into a moulding die, and then gradually heating the die, so that the two portions are foamed to different porosities and fuse together, removing the cooled body from the die and washing with water. The three foaming agents are suitably sodium bicarbonate, p-toluene sulphonyl hydrazide and p,p1-oxy-bis-benzene sulphonyl hydrazide respectively, and the latter may also be used as the foaming agent in the first portion. The preferred water-soluble salts are sodium chloride and sulphate. The composite material may be used as a rubber stamp (see Division B6).
GB2325265A 1965-06-01 1965-06-01 Composite porous material and process of making the same Expired GB1088681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2325265A GB1088681A (en) 1965-06-01 1965-06-01 Composite porous material and process of making the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2325265A GB1088681A (en) 1965-06-01 1965-06-01 Composite porous material and process of making the same

Publications (1)

Publication Number Publication Date
GB1088681A true GB1088681A (en) 1967-10-25

Family

ID=10192645

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2325265A Expired GB1088681A (en) 1965-06-01 1965-06-01 Composite porous material and process of making the same

Country Status (1)

Country Link
GB (1) GB1088681A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222224A1 (en) * 1973-03-21 1974-10-18 Wittel Frederick
FR2228787A1 (en) * 1973-05-07 1974-12-06 Funahashi Takaji
FR2432388A1 (en) * 1978-08-04 1980-02-29 Bando Chemical Ind INK TRANSFER SURFACE LAYER STRUCTURE OF A PRINTING DEVICE OR APPARATUS
US5816160A (en) * 1996-05-14 1998-10-06 Brother Kogyo Kabushiki Kaisha Stamp unit capable of detachably holding stamp plate formed with stamp image

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222224A1 (en) * 1973-03-21 1974-10-18 Wittel Frederick
FR2228787A1 (en) * 1973-05-07 1974-12-06 Funahashi Takaji
FR2432388A1 (en) * 1978-08-04 1980-02-29 Bando Chemical Ind INK TRANSFER SURFACE LAYER STRUCTURE OF A PRINTING DEVICE OR APPARATUS
US5816160A (en) * 1996-05-14 1998-10-06 Brother Kogyo Kabushiki Kaisha Stamp unit capable of detachably holding stamp plate formed with stamp image

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