Year: 1895

page_text: 1, ELEAZER KEMPSHALL, of 127 Waverly Avenue, Newton, in the County of
Middlesex, and State of Massachusetts, United States of America, Gentleman, 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 mechanism for applying plastic coverings to eyelets,
and has in view for one thing, to prevent the sticking of the eyelet in the mold or
die used to shape the plastic material, such sticking of the eyelet requiring a blow
to release it, and thereby endangering the finish. According to my invention,
means are provided in conjunction with the mold-members for holding onto the
shank of the eyelet, while the said mold-members separate. Incidentally, certain
improvements in the form of the mold are affected.
The drawings which accompany and form part of this specification illustrate
embodiments of the invention.
Fig. 1 shows a sectional illustration of one form of mold embodying the
invention, represented in open adjustment, with an eyelet and covering ready
to be united.
Fig. 2 shows a similar view, with the mold closed.
Fig. 3 shows another similar view, with the mold opened, and the eyelet
covered.
Fig. 4 shows a bottom face view of one member or part of a different or modified
form of mold.
Figs. 5 and 6 show sections similar to Figs. 1 and 2, of the latter form of
device.
Referring first to Figs. 1 and 3, the letter a designates a male mold-member or
die, which is supported in a suitable base b, and formed in its top with an encircling
groove b', substantially semi-circular in cross-section. The die has a central
projection 6, which rises considerably above the plane of the outer edge of the
groove, and is somewhat tapering. The plastic covering in the form of an annular
disk or ring o may be placed over this central projection and rest in the groove, as
clearly shown in Fig. 1. In the arrangement here shown, the male die is intended
to be stationary during the molding operation, and the base b in practice will
support a number of dies, so that a large number of eyelets can be treated
at once.
The letter d designates an eyelet-holding member or anvil in the form of a plate
perforated as at d¹ to receive the shank of the eyelet z, which will fit said hole
closely enough to prevent its falling out. In practice, this plate will have a

page_text: number of perforations corresponding with the number of dies, and these perforations.
will all be supplied with eyelets, and the plate then placed over the dies with the
flanges of the eyelets resting on the plastic rings c, as shown in Fig. 1. The
base-plate and the eyelet holding plate are intended to be portable, and are placed
in a press of any suitable kind, adjusted as shown in Fig. 1. It will be seen that
pressure on the plate d will drive the eyelet flange into the plastic material, and
said material will be molded around said flange, as shown in Fig. 2, the mold being
composed of the groove b¹, the central projection 6, and the under face of the
plate d, which acts in the nature of an anvil. It will be noticed that by having
the central projection extend above the plane of the outer edge of the groove, it
engages the sides of the eyelet, and the plastic material is properly confined at the
inner side, and a smooth finish is insured, the inner surface of the eyelet forming an
unbroken continuation of the inside of the metal portion of the eyelet.
In conjunction with the eyelet holding plate, and to strip the eyelets from the
die, I employ a block e, which carries fastened in it a number of pins el projecting
from the under side of the block, and split to form expanding spring-fingers e.
Only one of these split pins is here shown, although there will be in practice one
for each eyelet'in the plate d. The block is pressed down upon the plate d, and
the spring fingers enter the shank of the eyelet, and by pressing outwardly clamp
the said blank against the wall of the opening d'. Now this block may be placed
in position either before or after the pressing or molding operation, and in either
case when lifted up together with the plate & takes the eyelet with it, as shown in
Fig. 3. Then to release the eyelets, it is simply necessary to give a slight blow to
the plate d, so as to separate it from the block.
The withdrawal of the eyelet from the mold may be accomplished by gripping.it
only on the outer side, a construction wherein this is done being shown in Figs. 4
and '5. The base and female mold member are of the same form as shown in the
other figures, but a top plate or block is used, having a groove d with tapered
sides, which groove receives clamping pieces d³ in the form of elongated plates
formed with bevelled outer edges to engage the side walls of the groove, and
with confronting semi-circular openings in their inner faces, the walls of these
openings being serrated to form gripping edges, as seen at h¹.
The plates d are designed to move toward and from each other to vary the size,
of the opening. The shank of the eyelet is inserted in the opening when the
plates are farthest apart, as in Fig. 5. When said plates are moved into the
groove, the engagement of their outer edges with the side walls of the groove
causes the plates to close on tlie shank of the eyelet and firmly clamp it in the
opening h. The friction between the sides of the groove and the edges of the
clamping plates is sufficient to hold the plates in while the block is placed over.
the dies. When the molding of the plastic material has been accomplished, and
the covered eyelet has been lifted out of the mold, it can be detached, as in the
former case, by giving a slight blow to the clamping plates h.
It is evident the invention is capable of embodiment in other forms than here
shown I may, if desired, omit one of the lugs of the pin.
-
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. An eyelet covering mechanism comprising in its construction an eyelet
holding member, a die constructed to mold a covering about one end of an eyelet
held in said member, and means for holding the opposite end, of said, eyelet to
prevent it being withdrawn from said member by said, die, substantially as and for
the purpose set forth.
2. An eyelet-covering mechanism comprising a mold or die for, the covering
material, an eyelet-support opposed to said die, and means co-operating with said
support for clamping the eyelet to withdraw it from the mold, substantially as aud
for the purpose set forth.

page_text: 3. An eyelet-covering mechanism comprising a mold or die for the covering.
material, an eyelet-support opposed to said die, and an eyelet-clamp co-operating
with, but separable from said support, substantially as and for the purpose set.
forth.
4. An eyelet covering mechanism, comprising in its construction an eyelet
holding member or anvil, a die constructed to engage an eyelet placed in said anvil
and mold a covering about one end thereof, and a spring pin arranged to engage
the opposite end of said eyelet to remove the latter from the die, substantially as
and for the purpose set forth.
Dated this 20th do N100%
ELEAZER KEMPSHALL.
Haseltine, Lake & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant..