Containers for paint

The innovative paint container design with sloping grooves and a grooveless bottom surface addresses paint accumulation and mixing issues, ensuring complete usage and uniformity by facilitating easy loading and stirring.

JP2026081932APending Publication Date: 2026-05-19MARU T OHTSUKA CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
MARU T OHTSUKA CORP
Filing Date
2024-11-06
Publication Date
2026-05-19

AI Technical Summary

Technical Problem

Conventional paint containers face issues with paint accumulation at the bottom, difficulty in loading paint when low, and non-uniform mixing due to grooves extending to the bottom, especially with paints of higher specific gravity or when mixing multiple colors.

Method used

A paint container design featuring linear grooves that decrease in depth towards the bottom, an open upper end, and a grooveless area with a curved or inclined bottom surface, along with a brush-like edge to adjust paint amount and facilitate mixing.

Benefits of technology

Ensures complete paint usage without waste, easy loading even when low, and uniform mixing by preventing paint stagnation and sediment accumulation, allowing for efficient paint distribution and stirring.

✦ Generated by Eureka AI based on patent content.

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  • Figure 2026081932000001_ABST
    Figure 2026081932000001_ABST
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Abstract

The objective is to provide a paint container that allows for shaping the bristles of a paint brush, adjusting the amount of paint it holds, ensuring that paint is absorbed into the brush until the very last drop, and facilitating uniform stirring. [Solution] The device comprises a cylindrical body 11, a bottom surface 13 that closes the lower end of the side surface 12 of the body 11, and an opening 17 formed at the upper end of the side surface 12 of the body 11. The inner surface 12a of the upper body 11 is provided with a plurality of linear grooves 16 that extend along the vertical direction of the body 11 and are provided in the circumferential direction of the body 11, and a grooveless area 15 having a predetermined width w between the lower end 16b of the linear grooves 16 and the bottom surface 13, where the linear grooves 16 are not formed.
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Description

Technical Field

[0001] This invention relates to a paint container for containing and carrying paint during painting work.

Background Art

[0002] Conventionally, there is a container that is fitted into an outer frame such as a bucket for paint and contains paint. By preparing an inner container for each color to be used and replacing the container when changing colors for disposable use, the labor of cleaning the container can be saved. There are various types of this kind of paint container. As a container that can arrange the tips of paintbrushes or adjust the content, there is one in which convex portions for squeezing the brush are formed on the inner peripheral surface of the container (see Patent Document 1).

[0003] Also, as a device that more smoothly guides the excess paint that comes out when squeezing the brush downward, there is also a device as shown in FIG. 4. This conventional container is a resin molded product. On the inner peripheral surface of the cylindrical main body 1, a plurality of linear grooves 4 extending from the side surface 2 to the bottom surface 3 are formed. With the side surface 2 formed with irregularities by these linear grooves 4, the tips of the paintbrushes for painting can be arranged, or the excess paint can be squeezed to adjust the content.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the conventional paint container described above, the linear grooves 4 extend down to the bottom surface 3. As a result, paint tends to accumulate in the bottom portion 4a of the linear grooves 4 located on the bottom surface 3. For example, when the paint is running low during painting, it gets into the bottom portion 4a of the grooves. In this situation, it becomes difficult to load the brush tip with paint, so it is necessary to always supply extra paint to the container and finish the work while leaving paint in the grooves. Furthermore, depending on the type of paint, components with a higher specific gravity may settle over time. In such cases, or when mixing multiple colors, it is necessary to stir the paint. However, even when stirring the contents of the container with a stirring rod, the paint that has settled in the bottom 4a does not flow easily, and it takes a long time to mix the entire contents uniformly.

[0006] The object of this invention is to provide a paint container that allows for shaping the bristles of a paint brush, adjusting the amount of paint it holds, ensuring that the brush is saturated with paint even when the amount of paint is low, and that allows for easy and uniform stirring. [Means for solving the problem]

[0007] The first invention comprises a cylindrical body, a bottom surface that closes the lower end of the side surface of the body, and an opening formed at the upper end of the side surface of the body, wherein the inner surface of the body is provided with a plurality of linear grooves extending along the vertical direction of the body and provided in the circumferential direction of the body, and grooveless areas having a predetermined width between the lower end of the linear grooves and the bottom surface where the linear grooves are not formed.

[0008] The second invention is characterized in that each of the linear grooves has a groove depth that decreases from the upper end toward the grooveless area.

[0009] The third invention features a brush-like edge that protrudes toward the interior of the main body from the periphery of the opening, and each of the linear grooves has an open upper end.

[0010] The fourth invention is characterized in that the lower end of the inner surface has a curved portion along the outer circumference of the bottom surface, where the angle of inclination with respect to the bottom surface continuously decreases toward the bottom surface, and the curved portion constitutes the grooveless area. [Effects of the Invention]

[0011] According to the first invention, the linear grooves formed on the side allow for adjustment of the amount of paint held in the brush and for shaping the brush tip. Furthermore, because there are no grooves on the bottom, the paint can be used completely without any waste. In addition, by stirring the area near the grooveless area along the bottom, the paint can be mixed uniformly.

[0012] According to the second invention, paint that enters the linear grooves on the side can easily flow out from the bottom of the grooves, and paint that comes out of the brush wiped from above moves smoothly to the bottom.

[0013] According to the third invention, the amount of paint absorbed can be adjusted by wiping the brush with a brush-wiping edge provided on the opening edge of the main body. The excess paint that is wiped off flows into the linear groove from the upper end of the open linear groove, and is therefore easily guided towards the bottom surface.

[0014] According to the fourth invention, since no corners are formed between the sides and the bottom, paint and sediment do not stagnate. Therefore, the paint can be used completely, and the paint can be stirred uniformly. [Brief explanation of the drawing]

[0015] [Figure 1] Figure 1 is an external view of a paint container according to an embodiment of this invention. [Figure 2] Figure 2 is a cross-sectional view of the linear groove portion. [Figure 3] Figure 3 shows an example of use in which the paint container of the embodiment is fitted into the outer frame. [Figure 4] Figure 4 is a front view of a conventional paint container. [Modes for carrying out the invention]

[0016] An embodiment of the present invention will be described below. FIG. 1 is an external view of a paint container of the embodiment, FIG. 2 is a partial cross-sectional view, and FIG. 3 is an example of use in which the paint container of the embodiment is fitted into an outer frame.

[0017] This paint container is composed of a cylindrical main body 11 made of a resin molded product. The upper end of its side surface 12 is open, and it has a bottom surface 13 without irregularities that closes the lower end. The material and manufacturing method of the main body 11 are not particularly limited, but the manufacturing cost can be reduced by making each surface into a sheet-like resin. Also, among resins, by selecting a material with excellent solvent resistance, the freedom of choice of the paint to be used increases.

[0018] The upper part of the side surface 12 forms a large-diameter portion 14 with a large inner diameter via a stepped portion 14a. Also, the lower end side of the side surface 12 continuously decreases in inclination angle toward the bottom surface 13, forming a curved surface portion 15 along the outer periphery of the bottom surface 13. Furthermore, a plurality of linear grooves 16 extending along the vertical direction of the main body 11 are formed on the inner side surface 12a which is the inner side of the side surface 12 along the circumferential direction of the main body 1. In this embodiment, since the side surface 12 is in a sheet shape, the linear grooves 16 constitute linear convex portions protruding outward on the outer peripheral surface of the main body 11.

[0019] Each linear groove 16 has its upper end 16a opened at the large-diameter portion 14, and its lower end 16b is formed so as to be located above the curved surface portion 15 without being opened like the upper end 16a (see FIGS. 1 and 2). Therefore, in this embodiment, the curved surface portion 15 constitutes a groove-free area where no linear grooves are arranged. And the width w from the position (dashed line L) of the lower end 16b of the linear groove 16 to the bottom surface 13 is the width of the groove-free area. Also, as shown in FIG. 2, the bottom surface of each linear groove 16 is inclined such that the depth of the groove gradually goes inward of the main body 11 from the upper end 16a toward the lower end 16b, and the depth of the groove decreases toward the lower groove-free area (curved surface portion 15).

[0020] Furthermore, on the main body 11, a brush squeezing edge 17 with an opening edge protruding toward the inside of the container is formed. On the outer periphery of the main body 11, which is opposite to the brush squeezing edge 17, an annular convex portion 18 protruding outward is formed. In addition, a notch portion 14b is formed by recessing a part of the outside of the large-diameter portion 14 inward. In FIG. 1, only one notch portion 14b is shown, but a similar notch portion 14b is also formed at a position facing the one notch portion 14b in the annular large-diameter portion 14.

[0021] [Function, effect, etc.] The paint container of the above embodiment is used by fitting the main body 11 into a draw can 19 as shown in FIG. 3. The draw can 19 is made of, for example, metal and has an inner diameter substantially matching the outer periphery of the main body 11. Both ends of the handle 20 are rotatably attached to the mounting holes 19a on the side surface of the draw can 19. The end portions of both ends of the handle 20 penetrate through the mounting holes 19a and are located inside the draw can 19. As shown in FIG. 3, when the main body 11 of the paint container is inserted into the draw can l9, the annular convex portion 18 protruding outward from the main body 11 covers the opening edge of the draw can 19 and protrudes outward from the draw can 19. In this state, if paint is poured into the main body 11, the paint can be carried to the painting site.

[0022] When fitting the main body 11 into the draw can 19, by aligning the notch portion 14b of the main body 11 with the mounting hole 19a of the draw can 19, the main body 11 can be prevented from interfering with the movement of the tip of the handle 20 penetrating through the mounting hole 19a. Also, the end portion of the handle 20 will not damage the surface of the resin-made main body 11.

[0023] During the painting operation, the amount of paint held by the painting brush and the shape of the brush tip can be adjusted by the brush squeezing edge 17, which is the opening edge of the main body 11, and the linear groove 16. In this embodiment, since the annular convex portion 18 of the main body 11 covers the opening edge of the draw can 19 and protrudes outward, it is possible to prevent the paint squeezed by the squeezing edge 17 from soiling the outside of the draw can 19. Furthermore, since the upper end 16a of the linear groove 16 is open, excess paint that flows down from the wiping edge 17 flows into the linear groove 16 through the open upper end 16a via the large diameter section 14 and is guided to the bottom surface 13 from the lower end 16b.

[0024] In this embodiment, the paint container does not have grooves on the bottom surface 13 as in conventional containers, making it easy to load paint onto a brush even when the amount of paint remaining is low. Therefore, the paint can be used up completely without any waste. In particular, in situations where multiple types of paint need to be used, it becomes unnecessary to put more paint than needed into multiple containers 11. In particular, since not only the bottom surface 13 but also the lower part of the inner surface 12a (curved surface 15) is a grooveless area, paint and sediment are less likely to stagnate near the bottom surface 13 when mixing paint or color that has been left standing. By stirring the area near the grooveless area along the bottom surface 13, the paint can be mixed uniformly.

[0025] Furthermore, by making the lower portion of the inner surface 12a a curved shape, it is possible to increase the strength of that lower portion. On the other hand, by not extending the lower end of the linear groove 16 to the curved portion, and making the linear groove 16 substantially vertical throughout its entire range, including its lower end, the linear groove 16 is less likely to accumulate paint or sediment throughout its entire range. In other words, the main body 11 achieves both increased strength in the lower portion and less accumulation of paint or sediment near the bottom surface 13.

[0026] Furthermore, since the bottom surface of the linear groove 16 is sloped toward the inside of the main body 11, paint that enters the linear groove on the side can easily flow out from the bottom end of the groove, preventing paint from stagnating inside the linear groove 16. As a result, paint that has been wiped off from the brush above moves smoothly to the bottom surface.

[0027] In the above embodiment, the grooveless area is formed by a curved surface portion 15 whose slope gradually changes below the inner surface 12a, but the grooveless area does not have to be a curved surface. For example, it may be an inclined surface that is tilted at a constant angle with respect to the bottom surface 13, or it may be a portion that is at the same angle as other parts of the inner surface 12a. However, if the curved surface portion 15 is not provided, a corner may be formed between the inner surface 12a and the bottom surface 13, which may cause paint or sediment to stagnate. By avoiding the creation of a corner, as in the curved surface portion 15 described above, it becomes easier to achieve uniformity.

[0028] The above describes a paint container consisting of a cylindrical body 11, but the shape of the cylindrical body is not limited to a cylinder. For example, the cross-section may be elliptical or polygonal. However, shapes with small corners on the inner surface are undesirable from the viewpoint of uniform mixing, as paint tends to stagnate at the corners. Furthermore, the main body 11 may be used without being placed in an outer frame such as a hanging can. [Industrial applicability]

[0029] This is useful in painting jobs where multiple types of paint are used. [Explanation of symbols]

[0030] 11 Main unit 12 Side view 12a Inside surface 13. Base 15 (grooveless area) curved section 16 Linear grooves 16a top end 16b Bottom edge 17 (Opening edge) Brush-finished edge

Claims

1. It comprises a cylindrical body, a bottom surface that closes the lower end of the side of the body, and an opening formed at the upper end of the side of the body. On the inner surface of the above-mentioned main body, Multiple linear grooves are provided along the vertical direction of the main body and in the circumferential direction of the main body, A grooveless area having a predetermined width between the lower end of the linear groove and the bottom surface, and where the linear groove is not formed. A paint container equipped with [a specific feature / feature].

2. In each of the linear grooves described above, the depth of the groove decreases from the upper end toward the groove-free area. A paint container according to claim 1.

3. The opening is provided with a brush-like edge that protrudes toward the interior of the main body, Each of the above linear grooves has an open upper end. A paint container according to claim 1.

4. The lower end of the inner surface mentioned above is, The angle of inclination relative to the bottom surface decreases continuously toward the bottom surface, and the bottom surface has a curved portion along its outer circumference. The curved portion described above constitutes the grooveless area described above. A paint container according to claim 1 or 2.