JPH033411U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a partial diagram showing the arrangement of fold lines in paper;
Figure 2 is a perspective partial view showing the pleated state, Figure 3 is a perspective partial cutaway view showing the pleated paper rolled into a cylindrical chrysanthemum shape, and Figure 4 is the filter.
FIG. 2 shows a partially cutaway front view of the element assembly. 1: Paper, 2-5: Crease, 3', 3'', 5'
, 5″: diagonal crease, 12: conical trapezoidal perforated tube,
13: Cylindrical porous tube, 14: Closed end plate, 15: Open end plate, 20: Filter element assembly.

Claims (1)

[Scope of utility model registration request] In an element where a strip of paper is folded into a wave shape and rolled into a cylindrical shape to form a chrysanthemum shape, the pleat shape at the upper end is 1/2 the folding depth from the outer circumference toward the axis at the lower end. By doubling the number of folds, the folds at the bottom end that are sandwiched between the fold ridges that descend perpendicularly from the outer periphery of the upper end are formed by connecting the ridges and valleys on both sides so that the upper ends of the valleys of the folds at the upper end become the contact point. A filter element characterized in that, by forming the slanted striations, the pleated striations forming the inner periphery of the cylindrical shape are slanted from the upper end to the lower end and open toward the outer periphery, forming a trapezoidal shape with a conical inner periphery. .