US2957411A - Reproduction process - Google Patents
Reproduction process Download PDFInfo
- Publication number
- US2957411A US2957411A US747358A US74735858A US2957411A US 2957411 A US2957411 A US 2957411A US 747358 A US747358 A US 747358A US 74735858 A US74735858 A US 74735858A US 2957411 A US2957411 A US 2957411A
- Authority
- US
- United States
- Prior art keywords
- sheet
- solvent
- stick
- dye
- master
- 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
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
- B41M5/04—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet using solvent-soluble dyestuffs on the master sheets, e.g. alcohol-soluble
Definitions
- a master is prepared which has a back surface having the material to be reproduced thereon as a reversed image in a soluble dye.
- the equipment now sold under the trade name Ditto is typical of the practice of the process.
- One common way of making such master copies is to provide a sheet with a dyed surface (commonly referred to as a carbon sheet) which is placed with the dyed surface in contact with the back of the master sheet so that when material is written or typed on the front of the sheet a dye image is left on the back of the master sheet.
- the dyes normally used are soluble in various organic solvents such as alcohol, acetone and the like so that when it is desired to make reproductions, a sheet of plain paper is lightly moistened with a solvent, such as alcohol, and is pressed into contact with the back of the master sheet, whereupon a small amount of the dye is transferred to the second sheet leaving the desired impression thereon. Since only a small amount of the dye is transferred on each contact, a relatively large number of copies can be made by this process.
- the stick which is used employs a large proportion of solvent and a relatively minor portion of solidifying agent, and, since the solvent is volatile, all traces of the treatment of the paper disappear leaving only the dry desired image.
- Such sticks may contain a solvent for the dye, such as alcohol, various petroleum solvents, ketone type solvents such as acetone and methyl isobutyl ketone or ester solvents such as ethyl acetate.
- a solvent for the dye such as alcohol, various petroleum solvents, ketone type solvents such as acetone and methyl isobutyl ketone or ester solvents such as ethyl acetate.
- ketone type solvents such as acetone and methyl isobutyl ketone or ester solvents
- ethyl acetate it is generally preferred to use ordinary ethyl alcohol because of its ready availability, low cost and pleasant odor.
- solidifying agents can be used such as soap, higher alcohols, fatty acids and the like.
- One typical composition which has worked out well in practice is made as follows:
- Solution A Percent Stearic acid 5 Sorbitol 2 Alcohol 88 Solution B:
- the stick may be kept in a small case between useages and will last almost indefinitely until consumed.
- the stick may be partially wrapped in metal foil leaving only one end exposed thus preventing contact between the hands and the composition.
- a method of making reproductions by the spirit duplication process comprising rubbing a stick of solidified material containing a solvent for a dye over the surface of a sheet on which a reproduction is to be made and thereafter placing a master copy having said dye thereon in contact with said sheet.
Description
United States Patent 2,957,411 REPRODUCTION PROCESS S. Black, Palo Alto, Calif., assiguor to The Howard Company, Palo Alto, Calif., a part- Howard Robert nership No Drawing. Filed July 9, 1958, Ser. No. 747,358 3 Claims. (Cl. 101-1495) This invention relates to a copying method and more particularly relates to a method of making spirit reproductions.
In the spirit reproduction process (sometimes known as the Direct process) a master is prepared which has a back surface having the material to be reproduced thereon as a reversed image in a soluble dye. The equipment now sold under the trade name Ditto is typical of the practice of the process. One common way of making such master copies is to provide a sheet with a dyed surface (commonly referred to as a carbon sheet) which is placed with the dyed surface in contact with the back of the master sheet so that when material is written or typed on the front of the sheet a dye image is left on the back of the master sheet. The dyes normally used are soluble in various organic solvents such as alcohol, acetone and the like so that when it is desired to make reproductions, a sheet of plain paper is lightly moistened with a solvent, such as alcohol, and is pressed into contact with the back of the master sheet, whereupon a small amount of the dye is transferred to the second sheet leaving the desired impression thereon. Since only a small amount of the dye is transferred on each contact, a relatively large number of copies can be made by this process.
Normally, such copies are made on machine and such processes work well when a large number of copies are to be made at one time. However, there are other instances when it is desirable to provide a method whereby only a single impression is made at any one time. For instance, in the keeping of medical records a patients name and a serial number may be placed on a master sheet and each time a transaction occurs the patients name can be transferred to the laboratory or other record thus obviating the possibility of errors. In such applications, it is obviously impractical to employ a machine and it is inconvenient to employ liquid alcohol, or other solvent. Thus, no practical method now exists whareby single reproductions by such process can be ma e.
It has now been found that satisfactory reproductions can be made employing a solvent which has been solidified. The solvent, incorporated into a solid material,
can be conveniently formed as a stick or pencil and when it is desired to make reproductions by this process it is only necessary to rub the stick lightly over the surface on which one wishes to make the copy and then place the master copy over the thus treated surface and press it in place with the fingers. This makes a complete- 1y satisfactory copy without the inconvenience and fuss of using either a mac 'ne or liquid solvent. The stick which is used employs a large proportion of solvent and a relatively minor portion of solidifying agent, and, since the solvent is volatile, all traces of the treatment of the paper disappear leaving only the dry desired image.
Various sticks may be employed for carrying out the method of the present invention. Such sticks may contain a solvent for the dye, such as alcohol, various petroleum solvents, ketone type solvents such as acetone and methyl isobutyl ketone or ester solvents such as ethyl acetate. However, it is generally preferred to use ordinary ethyl alcohol because of its ready availability, low cost and pleasant odor. Various solidifying agents can be used such as soap, higher alcohols, fatty acids and the like. One typical composition which has worked out well in practice is made as follows:
Solution A: Percent Stearic acid 5 Sorbitol 2 Alcohol 88 Solution B:
Sodium hydroxide 0.64 Water (about) 5 Heat each solution to C. Add solution A to solution B and agitate. Pour the mixture into molds and it solidifies as it cools.
The stick may be kept in a small case between useages and will last almost indefinitely until consumed. The stick may be partially wrapped in metal foil leaving only one end exposed thus preventing contact between the hands and the composition.
I claim:
1. A method of making reproductions by the spirit duplication process comprising rubbing a stick of solidified material containing a solvent for a dye over the surface of a sheet on which a reproduction is to be made and thereafter placing a master copy having said dye thereon in contact with said sheet.
2. The process of claim 1 wherein the stick contains References Cited in the tile of this patent UNITED STATES PATENTS Itasse Champion Oct. 4, 1898
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US747358A US2957411A (en) | 1958-07-09 | 1958-07-09 | Reproduction process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US747358A US2957411A (en) | 1958-07-09 | 1958-07-09 | Reproduction process |
Publications (1)
Publication Number | Publication Date |
---|---|
US2957411A true US2957411A (en) | 1960-10-25 |
Family
ID=25004732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US747358A Expired - Lifetime US2957411A (en) | 1958-07-09 | 1958-07-09 | Reproduction process |
Country Status (1)
Country | Link |
---|---|
US (1) | US2957411A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3195455A (en) * | 1959-02-06 | 1965-07-20 | Columbia Ribbon & Carbon | Duplicating process |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US611687A (en) * | 1898-10-04 | Gustave itasse | ||
US2337737A (en) * | 1942-05-25 | 1943-12-28 | Ditto Inc | Duplicating process for reproducing color designs of high color intensity |
-
1958
- 1958-07-09 US US747358A patent/US2957411A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US611687A (en) * | 1898-10-04 | Gustave itasse | ||
US2337737A (en) * | 1942-05-25 | 1943-12-28 | Ditto Inc | Duplicating process for reproducing color designs of high color intensity |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3195455A (en) * | 1959-02-06 | 1965-07-20 | Columbia Ribbon & Carbon | Duplicating process |
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