Year: 1888

page_text: .
1, ALEXANDER HENRY REED, of Suffolk House, Laurence Pountney Hill, Cannon
Street, in the County of Middlesex, Engineer, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
This invention relates to a punch and die for securing grommets and eyelets, said
punch being provided with teeth or points which serve to penetrate the washer of the
grommet or the flange of the eyelet formed by setting, the same and form projections
or burrs, which take a firm hold of the material to which the grommet or eyelet is
to be attached. The die is also formed with teeth or points which act upon the flange
of the eyelet, all of which is fully described in the following specification and claims,
and illustrated in the accompanying drawing, in which
.
Fig. 1 represents a perspective view of the punch.
Fig. 2 is a vertical section of the punch.
Fig. 3 is a vertical section of the punch and die illustrating their action upon a sail
grommet.
Fig. 4 is a section of the die detached.
Fig. 5 is a face view of a grommet washer before it has been exposed to the action
of the punch.
Fig. 6 is a similar view of said washer after the same has been exposed to the action
of the punch.
Fig. 7 is a central section of a grommet clinched by a punch of the ordinary
construction.
Fig. 8 is a vertical section of the punch, illustrating its application to an eyelet
after the latter has been set.
Similar letters indicate corresponding parts.
In this drawing the letter A designates a punch which is provided with a nipple a
and a shoulder a¹. Outside of the shoulder are teeth or points a
B is the die,
which is bored out to receive the nipple a of the punch and the face of which is
provided with teeth or points. 2 similar to the teeth a² of the punch.
adapt the die to an old die B such as are generally used in the operation of setting
grommets or eyelets, such die is made in the form of a disk as shown in fig. 3, and 4,
In order to
ונכריד

page_text: the lower face of which fits the upper face of the old die B* fig. 7, but the present
improved die may be made integral with its support.
In using the punch for the purpose of more firmly securing an eyelet in its
position, the eyelet is first set by the ordinary inserting tools, the punch A, fig. 8, is
then introduced, and by a blow of a hammer this punch is driven down so that its
teeth a penetrate the flange D* formed on the eyelet in the previous operation of
inserting the same, and by these means projections or burrs are formed on the inner
surface of this flange which extend into and take a firm hold of the material to which
the eyelet is to be attached. If the eyelet after having been set by the ordinary
inserting tools, is placed upon the die B, and then exposed to the action of the
punch A, the teeth of the die act upon the flange of the eyelet as shown in fig. 3,
and the projections or burrs produced by these teeth give to the eyelet an additional
hold on the material.
In using the punch and die for setting a grommet the procedure is as follows: the
barrel of the eyelet C is passed through the cloth or other material, the washer D is
then placed upon the projecting end of said barrel, and the eyelet is placed upon the
die (see fig. 3); the punch A is then brought down. By the action of this punch the
eyelet C is clinched and at the same time the teetli a² of the punch indent or penetrate
the metal washer D of the grommet so as to produce burrs which extend into the
body of the cloth or other material. and to cause the washer to grip the same
tenaciously. At the same time the teeth 62 of the die B indent or penetrate the flange
of the eyelet C so that the cloth or other material is firmly retained. In some cases
it may be desirable to clinch the grommet with the ordinary setting punch and die as
shown in fig. 7. and afterwards expose it to the action of the punch A and die B.
This proceeding may be necessary if the eyelet C of the grommet projects so far through
the material that in attempting to clinch the same with the punch, the edge of the
eyelet, when turned over to the position shown in fig. 7 would strike against the inner
faces of the teeth a² of the punch.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. As an improved article of manufacture a punch for securing eyelets and grommets
in position, said punch being provided with a nipple a and with teeth a², substantially
as described.
2. As an improved article of manufacture, a punch for clinching grommets, said
punch being provided with a nipple a, a clinching shoulder a³ and teeth a' substantially
as described.
3. As an improved article of manufacture, a die for securing eyelets and grommets
in position, said die being bored out to receive the nipple of the punch, and being
provided with teeth substantially as described.
4. The combination with a die having a central orifice of a punch having a central
projecting nipple a and a series of outwardly projecting teeth a' around the inner end
portion of the nipple, substantially as described
5. The combination with a die having a central orifice, of a punch having a
projecting nipple a and a clinching shoulder a', and outwardly projecting teeth a²
around the inner end portion of the nipple, substantially as described.
6. The combination with a punch having a nipple a, of a die consisting of a disk
having a central orifice and provided with a series of outwardly projecting teeth b²
arranged around the orifice, substantially as described.
Dated this Fifteenth day of May 1888.