GB844364A - Improvements in or relating to copying processes - Google Patents
Improvements in or relating to copying processesInfo
- Publication number
- GB844364A GB844364A GB2856855A GB2856855A GB844364A GB 844364 A GB844364 A GB 844364A GB 2856855 A GB2856855 A GB 2856855A GB 2856855 A GB2856855 A GB 2856855A GB 844364 A GB844364 A GB 844364A
- Authority
- GB
- United Kingdom
- Prior art keywords
- parts
- paper
- coating
- carrier
- mirror image
- 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
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
Landscapes
- Paper (AREA)
- Color Printing (AREA)
- Printing Methods (AREA)
Abstract
844,364. Copying documents. ELLAMS DUPLICATOR CO. Ltd. Oct. 5, 1956 [Oct. 6, 1955], No. 28568/55. Class 100(2) A method of producing copies of matter to be copied comprises forming a mirror image of the matter, in a composition containing a soluble dye, on a carrier, and producing impressions on copy sheets by bringing the copy sheets into contact with the carrier, each copy sheet having a solid non-hygroscopic surface coating containing a substantially non-volatile solvent for the dye, whereby an impression is produced on the coating in the absence of moisture other than that present in the atmosphere. The solvent used is a non-volatile long chain fatty alcohol (e.g. oleyl alcohol) and the coating, which is anhydrous, includes a binder for the solvent consisting of nitrocellulose and may also include a white pigment of titanium dioxide (to reduce the transparency of the coated paper) and a precipitant (e.g. phosphomolybdic acid). In an example 100 parts by weight of titanium dioxide were ground into 250 parts of oleyl alcohol and added to a solution of 60 parts of a mixture of 70 parts of nitrocellulose and 30 parts of methylated spirits, in 360 parts of n-butyl acetate. The resulting liquid was applied to one surface of a white paper and the paper heated to draw off the n-butyl acetate and methylated spirit. The coated paper was then cut into copy sheets. The mirror image was formed by coating a melted mixture of 60 parts of methyl violet, 10 parts of carnauba wax and 30 parts of petroleum jelly on paper, placing the paper coated side upwards on a metal base and placing on top a piece of white, smooth surface paper which forms the carrier. The latter was then written on with a stylus so as to transfer the coating on to the carrier in the form of a mirror image of the matter inscribed. Where a precipitant for the dye is included in the coating on the copy sheet the coating is made as above except that before application to the paper a solution of 3.85 parts of phosphomolybdic acid in 385 parts of methylated spirit is added.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2856855A GB844364A (en) | 1955-10-06 | 1955-10-06 | Improvements in or relating to copying processes |
| DEE14487A DE1089782B (en) | 1955-10-06 | 1957-08-02 | Methods and means for making reproductions |
| US680355A US3034428A (en) | 1955-10-06 | 1957-08-26 | Copying processes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2856855A GB844364A (en) | 1955-10-06 | 1955-10-06 | Improvements in or relating to copying processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB844364A true GB844364A (en) | 1960-08-10 |
Family
ID=10277673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2856855A Expired GB844364A (en) | 1955-10-06 | 1955-10-06 | Improvements in or relating to copying processes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB844364A (en) |
-
1955
- 1955-10-06 GB GB2856855A patent/GB844364A/en not_active Expired
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