JPS6290710U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of this invention. FIG. 2 is a perspective view of the spacer portion. FIG. 3 is a sectional view of the bottom of a modified example of the container. Figure 4A is a cross-sectional view of the conventional product. Figure B is a perspective view of a portion of the circular desk. In the figure, 1...Circular desk, 1a...Boss part, 1
b...Outer peripheral part, 2a...Chevron protrusion, 2b...Radial groove, 3...Thin film material, 4a...Upper end plate, 4b
... lower end plate, 5 ... container, 6 ... cover.

Claims (1)

[Scope of utility model registration request] Made of synthetic resin with chemical resistance and heat resistance,
It has an annular boss portion 1a in the center and has chevron-shaped protrusions 2 on the upper and lower surfaces.
A thin film material 3 is disposed above and below a circular desk 1 having radial grooves 2b and radial grooves 2b.
A required number of desk elements are laminated, an annular upper end plate 4a is arranged at the upper end, a disc-shaped lower end plate 4b is arranged at the lower end, and the uppermost thin film material 3 is welded to the outer peripheral part of the desk element. The inner periphery is welded to the upper end plate 4a, the inner periphery of the thin film material 3 at the lowest stage is welded to the lower end plate 4b, and the inner peripheries of the upper and lower thin film materials 3 are welded to each other at intermediate steps to form the container 5. A laminated precision filter is housed in a laminated precision filter in which a spacer 10 of a required thickness is provided between the rib 7 on the bottom wall of the container 5 and the lower end plate 4b of the laminated element.