EP0046656A1 - Schwer entzündliche Schablonen-Korrekturflüssigkeit - Google Patents

Schwer entzündliche Schablonen-Korrekturflüssigkeit Download PDF

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Publication number
EP0046656A1
EP0046656A1 EP81303775A EP81303775A EP0046656A1 EP 0046656 A1 EP0046656 A1 EP 0046656A1 EP 81303775 A EP81303775 A EP 81303775A EP 81303775 A EP81303775 A EP 81303775A EP 0046656 A1 EP0046656 A1 EP 0046656A1
Authority
EP
European Patent Office
Prior art keywords
fluid
stencil
fluid according
correction
acetate
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.)
Withdrawn
Application number
EP81303775A
Other languages
English (en)
French (fr)
Inventor
Michael Horace William Mcallister
Gary Jackson
Murray Dr. Figov
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.)
Roneo Alcatel Ltd
Original Assignee
Roneo Alcatel 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 Roneo Alcatel Ltd filed Critical Roneo Alcatel Ltd
Publication of EP0046656A1 publication Critical patent/EP0046656A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/14—Forme preparation for stencil-printing or silk-screen printing

Definitions

  • This invention relates to a fluid for the correction of errors or faults in stencils that have been 'cut' by typing.
  • Stencil sheets that can be imaged by typing and that can be used for stencil duplicating have been used in offices for many years. They consist of a support or base sheet of tissue coated with a suitable coating that is impervious to duplicating ink, a paper backing sheet that acts as a support for the coated tissue as well as providing the means of mounting the stencil on the duplicator, and an intermediate waxed sheet to assist typing quality and often to increase readability of the typed stencil.
  • the invention provides a method of correcting a duplicator stencil which comprises applying to a cut area of a stencil tissue a fluid as defined herein, and allowing the fluid to dry to form a film rendering the cut areas ink-impervious.
  • the invention comprises as a package a plastics bottle containing a correction fluid as defined herein, a removable and reclosable cap for the bottle and an applicator brush for applying the contents of the bottle to stencil tissue.
  • Viscosity of the cellulose esters to be in corporated into the correction fluids is determined by A.S.T.M.method D1343-54T in the solution described as Formula A, A.S.T.M. Method D-87154T. Viscosities in poises are converted to A.S.T.M. seconds equivalent to values obtained under A.S.T.M. Method D-871.48. Resins characterised in this way will give solutions of the appropriate solids content (20%-35%) and flow for use in correction fluids so long as such resins have the correct solubility in non-flammable solvents.
  • Such solubilities are possessed by acetate/butyrate and acetate/propionate esters of cellulose which contain over 35% butyryl or propionyl content and under 15% acetyl content.
  • examples of such resins are those known as 1/2 second propionate and 1/2 second butyrate.
  • Commercial grades of cellulose acetate butyrate resins are CAB 381-0.5 and CAB 500-1 (Eastman Kodak) and Cellit BP 300 (Bayer).
  • a commercial cellulose acetate propionate grade is CAP-482-0.5 (Eastman Kodak).
  • Suitable non-flammable solvents are low molecular weight chlorocarbons that evaporate rapidly. These may be used individually or as mixtures. Examples of these are dichloromethane, 1:1-dichloroethane and 1:2-dichloroethylene.
  • plasticizing materials that will soften the resin as well as extending oils that stretch the resin structure in the film deposited on the stencil so that such a film is readily typable.
  • plasticizers are phthalate and phosphate esters - for example dibutyl phthalate and tricresyl phosphate.
  • Extending oils used are generally mineral oils, for example Carnea 19 or Carnea 46 oil (R.T.M. of Shell), Dutrex 217 (R.T.M. Shell) Flavex 15 (Shell) or Dortan 11 (Esso).
  • Correction fluids also may contain a dye or pigment either to highlight the correction in which case it will be a colour in contrast to the stencil colour, or to disguise correction in which case it will be the same colour as the stencil.
  • a dye or pigment is Rhodamine F.B. (R.T.M. Cheadle Colours).
  • An example of a suitable pigment is Titanox RA61 (R.T.M. Kronos).
  • a correction fluid was prepared from the following ingredients (parts by weight):
  • a correction fluid was prepared from the following ingredients (parts by weight):

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
EP81303775A 1980-08-21 1981-08-19 Schwer entzündliche Schablonen-Korrekturflüssigkeit Withdrawn EP0046656A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8027220 1980-08-21
GB8027220A GB2082613B (en) 1980-08-21 1980-08-21 Stencil correction fluid

Publications (1)

Publication Number Publication Date
EP0046656A1 true EP0046656A1 (de) 1982-03-03

Family

ID=10515587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81303775A Withdrawn EP0046656A1 (de) 1980-08-21 1981-08-19 Schwer entzündliche Schablonen-Korrekturflüssigkeit

Country Status (4)

Country Link
EP (1) EP0046656A1 (de)
AU (1) AU7428581A (de)
GB (1) GB2082613B (de)
ZA (1) ZA815725B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1186440A1 (de) * 2000-09-05 2002-03-13 Kodak Polychrome Graphics Company Ltd. Korrekturflüssigkeit für metallische Druckplatten

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR688425A (fr) * 1929-12-27 1930-08-22 Perfectionnements apportés à l'obtention de copies multiples à l'aide de stencils
US2333624A (en) * 1940-09-03 1943-11-09 Dick Co Ab Art of stencilization
FR2427369A1 (fr) * 1978-05-30 1979-12-28 Kores Holding Zug Ag Agent correcteur pour materiaux d'ecriture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR688425A (fr) * 1929-12-27 1930-08-22 Perfectionnements apportés à l'obtention de copies multiples à l'aide de stencils
US2333624A (en) * 1940-09-03 1943-11-09 Dick Co Ab Art of stencilization
FR2427369A1 (fr) * 1978-05-30 1979-12-28 Kores Holding Zug Ag Agent correcteur pour materiaux d'ecriture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1186440A1 (de) * 2000-09-05 2002-03-13 Kodak Polychrome Graphics Company Ltd. Korrekturflüssigkeit für metallische Druckplatten
US6517622B1 (en) 2000-09-05 2003-02-11 Kodak Polychrome Graphics, Llc Additive correction fluid for metal printing forms

Also Published As

Publication number Publication date
AU7428581A (en) 1982-02-25
GB2082613B (en) 1983-11-09
GB2082613A (en) 1982-03-10
ZA815725B (en) 1982-09-29

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR IT

17P Request for examination filed

Effective date: 19820624

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19841022

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FIGOV, MURRAY, DR.

Inventor name: MCALLISTER, MICHAEL HORACE WILLIAM

Inventor name: JACKSON, GARY