JPS6035841Y2 - tape measure - Google Patents

Description

[Detailed description of the invention] The present invention provides a novel gutter-shaped tape measure, in which a coating layer of incyanate resin is applied to a narrow and long biaxially stretched polyester film shaped into a gutter shape. , a scale is printed on the surface of this paint film, and the entire surface of the paint film including the scale printed part is coated with one type of resin selected from acrylic resin, polyvinyl chloride resin, polyamide resin, and polyurethane resin. The gist is that it is coated with a transparent resin.

In the illustrated example, a biaxially stretched polyester film 1 with a thickness of 0.25 mm and a width of 13 mm is shaped into a gutter shape with a radius of 20 mm using a hot roll (not shown), and the film 1 is coated with white isocyanate. A urethane resin paint 2 is applied to a thickness of about 10 to 15 microns, and the paint 2 is heated at a temperature of about 100 to 130°C for about 4 to 5 minutes to harden and dry, and then a rotary roller is applied to the surface of the paint film 2. A length scale 3 is printed using a scale printing machine (not shown), and an acrylic transparent resin paint 4 is applied to the entire surface of the paint film 2, and this paint 4 is heated at 150°C.
The finished product is obtained by heating for about 2 to 3 minutes at different temperatures to harden and dry.

Further, in the above embodiment, instead of applying the transparent resin paint 4, polyvinyl chloride resin may be coated by extrusion method.

Conventionally, it has been known that this kind of gutter-shaped tape measure uses a metal steel strip as a gutter-shaped core, but this has problems such as peeling of the coating due to rust and breakage due to repeated bending. Not only that, but there were other problems such as poor electrical insulation and lack of safety.

The present invention is an attempt to eliminate such drawbacks, and a coating layer of an isocyanate resin is provided on a narrow and long biaxially stretched polyester film shaped like a gutter as shown in the picture above. A scale is printed on the surface of the film, and the entire surface of the paint film, including the scale printed area, is coated with one type of transparent resin selected from acrylic resin, polyvinyl chloride resin, polyamide resin, and polyurethane resin. Since it is coated, it not only maintains its gutter-like shape even during long-term use and satisfies the uprightness and horizontality of a tape measure, but also prevents the coating from peeling off due to rusting or breaking due to repeated bending. Furthermore, it has practical effects such as high electrical insulation, excellent safety, excellent water resistance and chemical resistance, and being lightweight and convenient to carry.

[Brief explanation of the drawing]

The drawings show an embodiment of the tape measure of the present invention, in which Fig. 1 is a partial perspective view, Fig. 2 is an enlarged sectional view taken along the line A-A in Fig. 1, and Figs. 3 to 5 are manufactured. It is sectional drawing which shows a process in order. 1... Film, 2... White paint film,
3...Scale, 4...Transparent paint film.

Claims (1)

[Scope of utility model registration request] A paint layer of incyanate resin is applied to a narrow biaxially stretched polyester film shaped like a gutter, and a scale is printed on the surface of this paint film. A tape measure whose entire surface is coated with one type of transparent resin selected from acrylic resin, polyvinyl chloride resin, polyamide resin, and polyurethane resin.