US 4,479,287 AGranted

Eye hole for roping reinforced by grommet metal fittings as in sheet-like articles

OwnerHitoshi Asakainventor

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Abstract

In reinforcing an eye hole for roping of a sheet-like article by setting grommet metal fittings therein, there is formed an incised hole nearly equal in diameter to the outer diameter of the cylindrical portion of a male grommet, and the tongues covering the incised hole, which are made through a process of radially incising at a position where the eye hole for roping is to be provided on the sheet body, in place of a circular through-hole heretofore in use. Each of the tongues and the peripheral region of the incised hole are pressed together while being enfolded by the grommet metal fittings being depress-deformed through a suitable means, thereby leading to reliably and strongly setting of the grommet metal fittings and increasing the tensile strength of the eye hole for roping. According to this invention, the use of one male grommet by itself will suffice as a grommet metal fitting; it is also feasible to reinforce the eye hole for roping in the sheet body of thick cloth or the multiple-ply cloth through the joint use of a male grommet and a ring or male and female grommets.

Claims6

Dependent claims

A method for fabricating reinforced eye holes with a grommet in sheet-like material, said grommet including a flange portion and a central cylindrical portion, comprising the steps of pressing in a first direction a guide bar including a cutter towards said sheet-like material to make radial incisions extending from a central point therein, said radial incisions forming a plurality of tongues substantially equal to one-half the outer diameter of said cylindrical portion of said grommet;

supporting said grommet cylindrical portion on a grommet supporting member having an aperture therein and concurrently with said step of pressing said cutter moving said grommet supporting member in a second direction opposite said first direction to receive said cutter within said aperture thereby inserting said grommet cylindrical portion amidst said tongues lying adjacent said flange portion of said grommet;
and
pressing an upper part of said guide bar having a groove therein to receive said flange to compress said cylindrical portion over said tongues to deform and expand said outer cylindrical portion in the said groove toward said tongues and entrap said sheet-like materials and said tongues within said deformed portion.

Dependencies are inferred from the claim text.