Apparatus for Making Sheet Metal Boxes.
Year: 1898

page_text: Date of Application, 7th Apr., 1898-Accepted, 9th July, 1898
COMPLETE SPECIFICATION.
Apparatus for Making Sheet Metal Boxes.
I, TITO LIVIO CARBONE, of No. 343, Calle Sarandi, Monte Video, Republic of
Uruguay, 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:-
In the Specification on Application for Patent No. 17329. is described the
construction of a sheet metal box, having its sides and ends bent up from the base, '
and its lid hinged to it in such a manner as to open and close with a spring,
the whole consisting of only two pieces, the box and the lid. The present in-
vention relates to a machine for making these boxes as will be described referring
to the accompanying drawings.
In order that the construction and operation of the machine may be more
clearly understood the successive conditions of the box and its lid are shewn
in Figs. 1 to 7 inclusive.
Fig. 8 is a part elevation and part section of the press employed for shaping
the box and applying the lid.
Fig. 9 is a plan of the base of the press, part of which is shewn to an enlarged
scale in Fig. 10 which is a plan and Fig. 11 which is a longitudinal section.
Fig. 12 is a front view of the finishing punch and finger for placing the lid.
Fig. 13 is a section and Fig. 14 is a plan of the mechanism for feeding the
lids to the box press and Figs. 15 & 16 are part sections shewing this mechanism
in successive positions.
Figs. 17 to 22 inclusive are part sections showing successive positions of the
parts for applying the lid to the box.
Fig. 23 is a side view of the levers for moving the slide for feeding the lids.
Figs. 24 and 25 are sections on planes at right angles to each other of the
dies for shaping the lids. Fig. 26 is a plan. Fig. 27 is a part section and
Fig. 28 a part plan on an enlarged scale. Fig. 29 is an enlarged view of the
punch and springs for detaching the lid.
The apparatus which will presently be described is constructed and arranged
so as to carry a box and its lid through the successive stages of manufacture
shewn by Figs. 1 to 7 inclusive. Fig. 1 shews the piece a of sheet metal cut
out to form the body of the box. Fig. 2 shews the piece b for the lid which is
simply dished a little as shewn in Fig. 3. The box body is also dished, the
back flap being curved as shewn in Fig. 4. This flap is bent farther forward
as shewn in Fig. 5. The lid is then placed with its edge lying in the groove
of the back flap as shewn in Fig. 6 the sides of the box being now turned up.
Finally as shewn in Fig. 7 the front of the box is turned up and the two upper
lips of the sides are bent over the 2 tongues of the lid so as to constitute a spring
hinge.
The shaping of the box body, and the placing of the lid is effected by a press
such as is shewn in Fig. 8, 9, 10, and 11 the shaping of the lid being effected in
a separate press having dies & feeding mechanism arranged as shewn in Figs. 24
to 29 inclusive. Assuming the plate a to be cut out and the lids b to have been

page_text: prepared as will hereafter be described, the plates a are piled on the press over
one another between columns e, and the lids 6 are piled between column o¹, both
sets being ready to be advanced by feeding mechanism.
The feeding mechanism for the plates a comprises an eccentric or cam on the
fly wheel shaft of the press, which at every revolution moves to and fro a lever i
which terminates in a fork engaging pins on a sliding frame f having a pair
of inclined studs f¹, projecting just the thickness of one of the plates a so that
as f makes its stroke to the right it pushes the lowest plate a to the first die c
where on the descent of the punch m it receives its first dishing, and on the
retreat of the punch it is pushed upwards by the bottom of the die which is
urged upwards by a spring 9. At each side of the slide f there is a bar f which
is fixed to and moves with it, so that when the dished piece a is pushed up
out of the die, it is advanced by the bars 2 to the second die d when it has to
undergo all the subsequent operations on it. The feed slide f and its side
bars are retracted by spring lever k.
The punch n for the second die is fixed to the same head o as the punch m
moving with o. It has at one side a rounded nose n¹ and has mounted on it a
spring finger t in the form of a yoke having in its middle a nose t¹ which being
guided along a cam guide operates in conjunction with the nose n¹ to turn over
the rounded back of the box and to secure the lid 6 in position, these lids being fed
in the following manner. An arm (Fig. 23) attached to the vertically recipro-
cating head which carries the punches m and n by means of levers gives
reciprocating movement to a feed slider (Figs. 13, 14, 15 and 16) which slides
over a plate having through it an inclined slot p¹. The slider has a tongue l
and an adjustable nose 2 which, as it moves to the left, along with the tongue r
pushes the lowest lid 6 onwards causing it to drop through the slot ? as shewn
in Figs. 15 and 16. Referring now to Figs. 17 to 22 inclusive, the lid b is
received on an inclined guide n² down which it descends while the punch n
descends, and while the die is bending the back of the box over the nose n
(Fig. 19) the edge of the lid 6 guided by the nose 2 of the pawl & descends into
the groove formed along the front edge of the box back (Fig. 20) then by the
farther descent of the punch and box to the position shewn in Fig. 21 the box
ends, the lips of which had been previously turned vertically upwards, are made
by the sides of the die to turn upwards and consequently their lips are closed
over the tongues of the lid completing the hinge. The punch n then rising,
the bottom of the die urged upwards by the spring g', pushes up the completed
box a with its lid b in upright position as shewn in Fig. 22 and the dished plate
for the succeeding box, as it is fed forwards pushes the finished box off the
punch and its nose so that it drops into a bent tube which conducts to a recep-
tacle below.
The separate apparatus for feeding and dishing the lids b shewn in Figs. 24
to 29 inclusive is similar to that for effecting the feed and first dishing of the
plates a. A feed slide F with adjustable sloping projections F1 is moved for-
ward by a forked lever I worked by cam or eccentric on the shaft of the press
pushing the lowest of the pile of plates under the punch M which descends
while the slide F is retracted by spring levers K.
As the punch M rises a pair of springs S hold back the dished lid b¹ which
at the next advance of the feed slide is pushed by the side bars F2 on to an
incline down which it slides. The dished lids are then taken to the press Fig. 8
where they are piled between the columns o¹ as shewn in Fig. 13.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I claim
in respect of apparatus for making sheet metal boxes;-
1. A press having two punches, worked by a revolving fly wheel shaft, in
combination with the dies and feed gear whereby plates are advanced to the
first die where they are dished, then pushed onwards to the second die when

page_text: the box is completely formed with the lid hinged thereon and wherein the
finished box is pushed by the succeeding dished plate substantially as described.
2. A press having a single punch and die for dishing the lids, in combination
with feed gear for advancing the lid plates to the die and pushing them off
when dished, substantially as described.
3. In combination with the press referred to in Claim 1 the mechanism for
feeding and guiding the lids to the box as it is operated on in the second die,
substantially as described.