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US 5,545,434 AGranted
Method of making irregularly porous cloth
OwnerHermes Huarnginventor
Life of this patent
Estimating the term…
Abstract
A method of making an irregularly porous cloth includes a first process in which the woof threads of a cloth are so woven that the meshes of the cloth are irregular in shape. The cloth is then impregnated with a foaming material. The impregnated and foamed cloth is subsequently heated and rolled to form a shading cloth having irregular patterns and pores.
Claims4
A method of making an irregularly porous cloth comprising the steps of:
- (a) providing an irregular fabric having warp threads and woof threads, with said woof threads being arranged in a nonlinear manner with openings of different size between adjacent woof threads;
- (b) impregnating said fabric with a foaming material;
- (c) heating said impregnated fabric to cause said foaming material to foam;
- (d) removing a portion of said foaming material from the surface of said impregnated and heated fabric by pressurized air emitted from a nozzle so as to form a number of irregular pores of varying size between said warp threads and said woof threads;
- and
- (e) pressing said fabric, obtained in said step of removing a portion of said foaming material, with a roller, whereby a residue of said foaming material forms an irregular pattern on said fabric.
3 more elements
A method of making a plastic impregnated cloth containing areas with pores of irregular size and shape, and non-porous areas, comprising:
- weaving an irregular fabric with woof threads arranged in a nonlinear manner so as to provide openings of different sizes and shapes between adjacent woof threads;
- impregnating said fabric with a plastic material containing a foaming agent;
- heating said impregnated fabric to cause said plastic material to foam;
- applying pressurized air to said fabric to remove a portion of said plastic material and thereby forming areas of irregular pores of varying size between said woof threads;
- and
- pressing said impregnated fabric and solidifying said plastic foam.
3 more elements
Dependencies are inferred from the claim text.