JPS6159879B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an underlay for use on the underside of paper, film, etc. when cutting paper, film, etc. using a cutter knife;
In particular, the present invention relates to an underlay suitable for projecting light from below the underlay to clearly highlight lines and patterns previously applied to paper, film, etc., and cutting while tracing these lines.

Background Art An underlay in which a rubber sheet is bonded to a substrate made of wood or other material is known. Such an underlay has the effect of closing the cut due to the elasticity of the rubber sheet, and is useful to some extent.

On the other hand, when cutting paper, film, etc. into an appropriate shape, light may be projected from the underside of the underlay to highlight lines and patterns and be traced while cutting. If the substrate and elastic sheet are simply made of semi-transparent materials to serve as an underlay, the following problems arise.

That is, in FIG. 1, 1 is a substrate, and 2 is an elastic sheet pasted on the substrate 1. Both of these are made of a milky white semi-transparent synthetic resin material. Even if the cut 3 made on the surface of the elastic sheet 2 with a cutter knife is closed by the resilience of the elastic sheet 2, the translucency will be impaired, and for example, the cut 3 will not be visible when viewed from the eye position 4 shown in the figure. appears dark as a band-shaped shadow, which not only significantly impairs the appearance of the underlay, but also easily confuses it with trace lines, making it extremely difficult to use.

Therefore, the first object of the present invention is to obtain a semi-transparent underlay in which band-shaped shadows caused by cuts are difficult to see.

Moreover, when the surface of the elastic sheet 2 is smooth,
If you closely observe the cut 3, you will see that the bulge 5 remains at the cut, and you can tell whether it continues by looking at it or touching it with your fingers.

A second object of the present invention is to prevent such incisions from being visually or tactilely perceivable. Therefore, it is possible to obtain an underlayment in which virtually no incisor remains.

In addition, when cutting using an underlay as described above, place the paper or other sheet to be cut coated with glue or other adhesive on the underlay surface, cut the sheet as appropriate, and then remove the cut pieces from the underlay. You may need to peel it off and stick it on something else. In such a case, if the glue or the like is partially transferred to the underlay side, there is a problem that it becomes impossible to stick it to other things with sufficient strength.

A third object of the present invention is to obtain an underlay structure in which adhesives such as glue are difficult to transfer to the underlay side.

A fourth object of the present invention is to obtain a structure that can simultaneously achieve the above first to third objects.

Other objects and configurations of the present invention will be described in the following description based on the drawings.

As shown in FIGS. 2 and 3, the basic configuration of the present invention is to bond an elastic sheet 2 onto a substrate 1,
By composing both of them with a semi-transparent material, the entire structure is made semi-transparent. Minute marks 6 (circles with a diameter of about 0.8 mm) are provided on the surface of the elastic sheet 2 by silk screen printing so that they are uniformly lined up. Although the marks 6 have a lower light transmittance than the substrate 1 and the elastic sheet 2, they have a semi-translucent property that does not interfere with the light transmission, and there are about 50 marks per 1 cm ² of the surface of the elastic sheet 2. are arranged, and the total area is the elastic sheet 2
It is approximately 1/3 of the effective surface area (the area excluding areas that are not normally used, such as the periphery of the sheet).

When the cut 3 is made in the underlay with the above structure, when viewed from the eye position 4 in Fig. 2, the mark 6 has a lower light transmittance than the substrate 1 and the elastic sheet 2, so the mark 6 forms a band of the cut 3. The shadow of the screen is blocked, and the shadow is fragmented both in the depth direction and the length direction and appears to the eye, and the shadow as a whole is blurred, so it does not become an eyesore.

Also, since the mark 6 above is semi-transparent,
When tracing work is performed by applying light from below the substrate 1, there is an advantage that shadows of the marks 6 are difficult to occur, and therefore, the tracing work is easy to perform. That is, it is desirable that the mark 6 is non-transparent in order to block the shadow of the cut 3, but if it is made non-transparent, the mark 6
This is undesirable because it creates its own shadow on the tracing paper. For this reason, in the present invention, the mark 6 is formed to be semi-transparent to block the shadow of the cut 3 and at the same time prevent the formation of a shadow on the tracing paper.

Furthermore, by forming the marks 6 uniformly and dot-like, the following effects can be obtained.

In other words, for example, when many lines are formed on a surface by printing, if there are cuts along the lines, the printing ink will be cut and peeled over a long area by the cuts, causing the problem that the cuts will be noticeable. Moreover, when printing a pattern with a pattern that spreads out in a planar shape, there is a disadvantage that the cut marks are more noticeable than when printing a pattern with lines. In areas without printing, there is no peeling due to cutting or cutting of the printing ink, so cuts in these areas are not very noticeable, but in areas with printing ink, they are easily noticeable as described above.

However, if the marks 6 are formed dotted and uniformly as in the present invention, even if the marks 6 lined up in a straight line are cut or peeled off one after another due to one cut, Since the cut marks appear in the form of dots, they have the advantage of being less noticeable.

The one shown in FIG. 4 further enhances the above effect, and has minute irregularities 8 on the surface of the elastic sheet 2.
is applied by embossing, and the mark 6 is formed on this uneven surface. In this case, the light beam 9 from below the substrate 1 is diffusely reflected by the uneven surface, and the diffused reflection 7 serves to eliminate the band-shaped shadow caused by the cuts 3. Therefore, the shadow of the cut 3 is further blurred compared to the one shown in FIG. 2, and there is virtually no hindrance to the tracing work.

Moreover, the unevenness 8 has the following effect. That is, when the elastic sheet 2 is smooth, a slight elevation 5 remains at the cut 3 as shown in FIG. By forming the rise 5 to the same extent as the rise 5, the rise 5
This makes it difficult to distinguish between the unevenness 8 and the incision, making it impossible to detect the incision. Of course, the irregularities 8 must be so small that they do not impair the flatness of the surface of the elastic sheet 2.

Also, when applying an adhesive such as glue to one side of a sheet to be cut, such as paper, and cutting this coated surface on an underlay, the adhesive may transfer to the underlay at the mark 6. Since the marks 6 are uniformly formed, the adhesive remains evenly.
Therefore, the cut pieces can be attached to other objects as they are, and there is also the advantage that the adhesive force is uniform.

Next, another embodiment shown in FIG.
is made up of two layers: an upper sheet 2a and a lower sheet 2b,
The upper layer sheet 2a is made of a material that is thinner than the lower layer sheet 2b and has a higher expansion/contraction ratio. The knife cut 3 is generally wide on the top side of the sheet 2;
It becomes a V-shape that becomes narrower as it reaches the lower surface. In order to close such cuts 3 with the resilience of the sheet itself, it is possible to more reliably close the cuts 3 if the upper layer sheet 2a has a higher expansion/contraction ratio than the lower layer sheet 2b.

In addition, the elastic sheet 2 is too thick and the cuts 3 are formed on the substrate 1.
If this is not achieved, the tip of the knife is likely to be inclined, and a diagonal cut 3' is likely to be made as shown in FIG. Therefore, if the tips of the cuts 3' come into contact with each other, the sheet piece 10 between the two cuts may be cut off.
Therefore, the sheet 2 should not be too thick, and after various experiments, it was found that a thickness of around 1 mm is most suitable. The specific numerical values are as follows.

The thickness of the upper layer sheet 2a is 0.15 to 0.3 mm, and the thickness of the lower layer sheet 2b is 0.8 to 0.7 mm. However, the material of each sheet is soft vinyl chloride.

In the range of the above numerical values, the cut 3 reliably reaches the substrate 1 as shown in FIG. It was found that the proportion of

In addition, by forming a large number of groove-shaped stripes 11 in one direction or in a cross direction on the bottom surface of the substrate 1, even if the substrate 1 is heated by the projection of light from below, the stripes will remain between the substrate 1 and the tracing table. A gap is formed by the stripes 11, and air flows through the stripes 11, so that the temperature of the substrate 1 can be prevented from rising. Therefore,
The temperature difference between the substrate 1 and the elastic sheet 2 is relatively small, and the tendency of the entire underlay to curve, which tends to occur when the temperature difference between the two is large, can also be eliminated.

As described above, the present invention not only achieves the above-mentioned first to fourth objects, but also exhibits other useful effects, particularly as an underlay when cutting while tracing by projecting light. It is suitable.

[Brief explanation of the drawing]

Fig. 1 is a partially enlarged sectional view of the cutting underlay for explaining the problems of the prior art of the present invention, Fig. 2 is a partially enlarged sectional view of the cutting underlay of the present invention, and Fig. 3 is a part thereof. A cutaway perspective view, FIGS. 4 and 5 are partially enlarged sectional views of other embodiments, and FIG. 6 is a partially enlarged sectional view of a cutting underlay for explaining the problems of the prior art of the present invention. be. 1...Substrate, 2, 2a, 2b...Elastic sheet,
3... cut, 5... bump, 6... mark, 8...
Unevenness.

Claims (1)

[Claims] 1. In a cutting underlay in which an elastic sheet is laminated onto a substrate, the substrate and the elastic sheet are semi-transparent, and the entire surface of the elastic sheet has a lower translucency than the substrate and the elastic sheet. A cutting underlay characterized by having minute dot-shaped semi-transparent marks uniformly formed by printing. 2. A patent claim characterized in that a minute uneven surface is formed on the entire surface of the elastic sheet by embossing, and minute semi-transparent marks in the form of dots are uniformly formed on the uneven surface by printing. Sheet for cutting as described in Scope 1. 3. The cutting pad according to claim 1 or 2, wherein the total area of the semi-transparent marks is about 1/3 of the effective area of the surface of the pad. 4. The cutting underlayment according to claim 1, 2, or 3, wherein the elastic sheet is composed of two layers, and the upper layer sheet has a higher expansion/contraction ratio than the lower layer sheet. 5. The cutting underlayment according to claim 1, 2, 3, or 4, wherein the elastic sheet has a thickness of about 1 mm.