JPS58549Y2 - double-sided copy sheet - Google Patents

Description

[Detailed description of the invention] This invention is a double-sided structure in which the necessary information is written on both the front and back sides of a predetermined portion of the sheet, so that the necessary information is also copied on both the front and back sides of the predetermined portion of the connected sheets. Concerning copy sheets 0 Conventionally, when creating two copies of a sheet with necessary information written on both sides of the sheet, carbon paper was inserted between the two sheets and copies were made by one writing. The combination of two sheets was changed, carbon paper was inserted again between them, and copies were made by one writing.

However, when using carbon paper, it takes time and effort to combine the sheets and insert the carbon paper, which greatly hinders quick office work, and when inserting the carbon paper, the sheet gets dirty and the hands get dirty. Not only was this inconvenient, but there were also many inconveniences in the treatment of carbon paper after use.

In addition, spot carbon paper coated with carbon in spots has been used to prevent parts of the sheet being copied from being copied, but this not only requires time and effort to manufacture, but also requires a lot of effort in aligning the sheet with the sheet when it is inserted. It was also difficult, uneconomical, and inconvenient.

Therefore, in this invention, we provide a double-sided copying sheet that eliminates and improves the above-mentioned drawbacks, and will be explained based on drawings showing embodiments of this invention.A double-sided copying sheet 1 according to this invention is shown in FIG. As shown in
In one sheet 2 in which the sheet 2a and the sheet 2b are connected, electron-donating color formers 3a and 3b made of encapsulated leuco dye, etc. are applied to both sides of the sheet 2a, and the sheet 2b is An electron-accepting color developer 4a, 4b made of acid clay, acidic phenol resin, etc. is applied, and a perforation line 5 for folding and separation is made at the connecting portion of each sheet 2a, 2b. Become.

Next, to explain how to use this double-sided copying sheet 1, as shown in FIG.
When printing pressure is applied from the surface of the color former 3a and necessary information is written, a color developing reaction occurs between the color former 3b and the color developer 4b, and the color developer 4
A copy is made on the side b, and then, as shown in FIG. When printing pressure is applied and the necessary information is written, a color development reaction occurs between the color forming agent 3a and the color developer 4a, and a copy is taken on the surface of the color developer 4a, thereby creating a sheet 2a t with the necessary information written on both sides. 2b
Two parts are completed, which are cut off from the perforation line 5 for use.

In addition, in another embodiment of this invention, as shown in FIG.
Coloring agents 3a and 3b are applied to both sides of 2a,
Color developer 4a is placed on both sides of b.

4b is applied, and the sheet 2a and the sheet 2b are glued and connected along one end, and a perforation line 5 is formed to separate the connected portion.
will be established.

In use, similar to the above-mentioned double-sided copying sheet 1, after writing the necessary information on the side of the color former 3a, the side of the color former 3a and the side of the color developer 4a are stacked so that they are in contact with each other.
The necessary information is written on the side b, copies are made on both sides of the sheet 2b, and the sheets are cut off along the perforation line 5 for use.

As mentioned above, since the double-sided copying sheet of this invention is constructed in conjunction or as a set, it is possible to make two copies of the sheet with different necessary information written on both sides without taking any trouble in aligning the sheets, and If you open the sheet after filling out the necessary information, you can see the same information written on the front and back of the sheet on the same plane, making it easy to check the information. When used for shipping and other sheets for backup, the sheet area is half that of conventional sheets, so it is lightweight for mailing, and it is not bulky for organizing and storing various forms, report papers, etc.
Very convenient for use on stationery, questionnaire forms, etc.

Note that the size of the sheet 2a and the sheet 2b described above may be different, and when using the double-sided copying sheet of this invention, a sheet coated with a color developer on one side and a color former on the other side. It may be used in combination with

[Brief explanation of the drawing]

1 and 4 are cross-sectional views of the double-sided copying sheet according to this invention, and FIGS. 2 and 3 are explanatory diagrams of the usage state of the double-sided copying sheet of FIG. 1. 1 is a double-sided copying sheet, 2a and 2b are sheets, 3a and 3b
is a color former, 4a and 4b are color developers, and 5 is a perforation line.

Claims (1)

[Scope of utility model registration request] A double-sided sheet in which a sheet coated with a coloring agent on both sides and a sheet coated with a coloring agent on both sides that develops a color with the coloring agent of the sheet are connected to form a set, and a perforation line is provided to separate the connected portions. Copy sheet.