摘要:
A plastic container comprising a bottom portion which has a substantially rectangular bottom surface, a trunk portion which is formed by four planes which rise up vertically from respective sides of the bottom surface and which is substantially rectangular pipe-shaped, a mouth portion whose surface area of a portion surrounded by a horizontal cross section is smaller than the surface area of the trunk portion, and a shoulder portion which is narrowed down from the trunk portion to the mouth portion, characterized in that: the amount of the contents of the plastic container is 800 to 3000 ml; the average thickness of the trunk portion is 0.2 to 0.7 mm; the ratio of a length H of the trunk portion to a length L of a diagonal line of a rectangle formed by the outer periphery of a horizontal cross section of the trunk portion (H/L) is 2 to 4; and each of the vertexes of the rectangle formed by the outer periphery of the horizontal cross section of the trunk portion forms an arc-shaped configuration so that a radius R of curvature of the vertex is 3 to 20 mm. The plastic container has a high space efficiency, has self-sustainability and configuration maintainability, is friendly to the environment in that it is easy for the container to be crushed, and is useful as a container for photographic processing chemicals. A method of and a device for supplying photographic processing chemicals using this plastic container is also provided.
摘要:
In each of radial grooves 52 which are formed on a sealing disc portion 34 of a packing 10, low strength portions 64 are formed within a predetermined range from the center of the sealing disc portion 34 by decreasing the thickness of each of thin portions 62 by deeply cutting each of the radial grooves 52. When the center of the sealing disc portion 34 is pressed by the pressing means, splits are formed at the low strength portions 64, and extend to curved grooves 54 and circumferential grooves 56. As a result, it is possible to obtain a plugging member in which a draining port can be opened wide with a small amount of pressing force.