US1364542A - Copying-pad - Google Patents

Copying-pad Download PDF

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Publication number
US1364542A
US1364542A US370034A US37003420A US1364542A US 1364542 A US1364542 A US 1364542A US 370034 A US370034 A US 370034A US 37003420 A US37003420 A US 37003420A US 1364542 A US1364542 A US 1364542A
Authority
US
United States
Prior art keywords
copying
pad
parts
sheet
now
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
US370034A
Other languages
English (en)
Inventor
Nat B Browne
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.)
HYPERGRAPH Co
Original Assignee
HYPERGRAPH Co
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 HYPERGRAPH Co filed Critical HYPERGRAPH Co
Priority to US370034A priority Critical patent/US1364542A/en
Application granted granted Critical
Publication of US1364542A publication Critical patent/US1364542A/en
Anticipated expiration legal-status Critical
Priority to JP8934771A priority patent/JPS557453B1/ja
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/06—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet using master sheets coated with jelly-like materials, e.g. gelatin

Definitions

  • My invention relates to a composition for copying pads and has for its object a copying pad inexpensive of manufacture and capable of making copies of printed or writ- 'ten matter, made by means of any commercial copying ink of any color.
  • magnesium silicate 200 parts calcium carbonate 150 parts, magnesium sulfate 10 parts, acacia gum 3?; parts, gum tragacanth 3 ⁇ , parts, dextrin parts, glycerin 130 parts.
  • the ingredients are compounded as follows: In a suitable receptacle the glycerin is placed and heated and thedextrin, acacia gum, gum tragacanth and magnesium sulfate are added and the temperature raised to about 150 1*. being careful not to bring the mixture to a boil in' order to prevent destructive reactions. The mixture is thoroughly stirred until a homogeneous mass is formed. The magnesium silicate and calcium carbonate are now incorporated and the mixture agitated until the ingredients form a homogeneous mass. It may be mentioned here that the magnesium silicate and calcium carbonate used are in the form of an extremely fine powder. The mass is now spread upon a table in a thin layer and allowed to undergo an aging process for a few days.
  • magnesium silicate produces an extremely line granular texture of the composition and the calcium carbonate is used to give it the proper density.
  • the magnesium sulfate is a fixative soluble in glycerin and prevents the ink from running on the pad. Furthermore, magnesium sulfate will not precipitate the adhesives mentioned, namely, acacia gum. gum tragacanth and dextrin, from the solution. It should be noted that said adhesives are all soluble in glycerin.
  • a composition for a copying pad for nesium sulfate 10 warts acacia um 3?, )arts gum t 'agacanth 3?; parts, dextrin 3?, parts, and glycerin 130 parts.

Landscapes

  • Graft Or Block Polymers (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
US370034A 1920-03-30 1920-03-30 Copying-pad Expired - Lifetime US1364542A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US370034A US1364542A (en) 1920-03-30 1920-03-30 Copying-pad
JP8934771A JPS557453B1 (enrdf_load_stackoverflow) 1920-03-30 1971-11-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US370034A US1364542A (en) 1920-03-30 1920-03-30 Copying-pad

Publications (1)

Publication Number Publication Date
US1364542A true US1364542A (en) 1921-01-04

Family

ID=23457954

Family Applications (1)

Application Number Title Priority Date Filing Date
US370034A Expired - Lifetime US1364542A (en) 1920-03-30 1920-03-30 Copying-pad

Country Status (2)

Country Link
US (1) US1364542A (enrdf_load_stackoverflow)
JP (1) JPS557453B1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936241A (en) * 1957-05-16 1960-05-10 Sperry Rand Corp Non-printing indicia ink

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4995737U (enrdf_load_stackoverflow) * 1972-12-06 1974-08-19
JPS5963573U (ja) * 1982-10-20 1984-04-26 小林　忠雄 ビデオカメラの運搬装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2936241A (en) * 1957-05-16 1960-05-10 Sperry Rand Corp Non-printing indicia ink

Also Published As

Publication number Publication date
JPS557453B1 (enrdf_load_stackoverflow) 1980-02-26
JPS474631A (enrdf_load_stackoverflow) 1972-07-03

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