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by Arthur J. Alberts and Mark P. Snyder

This invention relates
to the production
of jects and
advantages will appear
from the deheaded bolt
blanks
and similar articles, and
has to do with a
machine for
producing such
articles.

It is the present
practice in producing
headed bolt
blanks
to cut the wire
or stock in
appropriate lengths,
form upon one end of the
blank
thus produced
a substantially cylindrical
head
of the proper thickness
and diameter for
producing a desired
head,

these operations being
performed in a heading
machine,
after which the
blank
is passed through
a trimming
machine
which trims the
substantially cylindrical
head
to the final
size and shape
of the desired
head.

Under the present
practice referred
to, the use of a heading
machine
and a trimming
machine
is necessary.

My invention is directed
to the provision of
means whereby the
heading
and trimming
operations are
in one
machine,
thus eliminating the use of
a separate trimming
machine
with corresponding
reduced cost of production,
an important consideration
in this art.

The method of
operation of my
machine
comprises
upsetting an end
portion of a
blank
and simultaneously partially
forming thereupon
a head of
the desired shape
and size, forming
the remainder of the
upset
portion to
the desired shape
and size
of the
head,
thus completing the
head
with a relatively thin
fin of
flash
metal
extending about the
head
between the inner
and the outer
faces thereof,
upsetting
the end
portion of a second
blank while inserting the
head
of the first
blank
into a trimming
die, and
driving the
head
of the first
blank
through the trimming
die
trimming off
the fin of
flash
metal, thus completing the
head
of the first
blank, while
forming the
head
of the second
blank
to the desired
size and shape.

The machine comprises
means whereby
the successive
steps the operation are
performed in proper
sequence such that during the
upsetting
and partial
forming of the
head
on a second
blank
a first
blank,
upon which a
head
with a fin of
flash
metal
extending thereabout
has previously been
formed,
is inserted
into the trimming
die,
this first
blank
being forced through the trimming
die
during the succeeding step
of completing
the formation of the
head
upon the second
blank,
which is conducive to
high speed operation
with resulting
increased output
of the
machine.

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