A Machine for Connecting the Edges of Metal Plates by Folding.
Year: 1890

page_text: Date of Application, 2nd Oct., 1890
Complete Specification Left, 17th June, 1891-Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION.
A Machine for Connecting the Edges of Metal Plates by Folding.
I FREDERIK PIETER DE JONGE of Amsterdam in the Kingdom of Holland,
Manufacturer do hereby declare the nature of this invention to be as follows:-
-
The object of this invention is to construct a machine for connecting the edges of
metal plates by folding, said machine being suitable for use in making tins or cans
for packing fruit or other matters.
The machine comprises two blocks or parts one of which is movable to and from
the other, one of said blocks forms the support for the plate or plates to be bent
and is preferably made projecting from the general frame of the machine so that it
may be encircled by a plate, the opposite edges of which are to be fastened together,
and said plate be removed after such fastening In this supporting block are two
rails lying along the length of said block, the one a fixed rail and the other a
movable rail supported on or by springs which tend to raise the rail. In the other
of the two blocks are three rails, the central one of which is movable back and
forth in the plane of its breadth to and from the fixed rail in the first block and
serving as a die with the latter as a matrix.
The other two rails in this block are pivoted to oscillate to and from the central
rail with which they are parallel, and one of them is likewise movable back and
forth in a plane parallel to the aforesaid die rail.
This latter movable rail and the die rail are moved at the proper times by
eccentrics or other equivalent parts of the machine being normally held out of action
by springs.
The two blocks are in relative position so that the five rails above mentioned
operate together in the following manner. The edges of the plate or plates to be
connected are inserted from opposite sides between the two blocks the upper edge
under the die rail and against the side of the movable rail next thereto, the other
above the matrix rail and against the inner side of the rail next thereto.
The die rail and movable rail next thereto are then lowered, the die rail bending
the edge of the upper plate down at right angles over the edge of the lower
movable rail, and the movable rail next to the die rail forcing the lower plate into
a recess in the matrix rail by which, same is bent slightly downward and then
upward at right angles, this upward bend being within the downward bend in the
upper plate. The die rail is then drawn up and the blocks approached, the
oscillating upper rail and movable lower rail then move the upper plate inward
bending the edge to a more acute angle against the inner face of the other upper
movable rail, and also operating to the same result on the lower plate by the
pressure of the latter against the inner face of the lower movable rail.
By this means, the edges of the plates are hooked together over the matrix rail,
the die rail then descends again and presses the edges firmly together on the matrix
rail setting in the joint also flush with the outer face of the plates.
Dated this 2nd day of October 1890.

page_text: COMPLETE SPECIFICATION.
A Machine for Connecting the Edges of Metal Plates by Folding.
I FREDERIK PIETER DE JONGE of Amsterdam in the Kingdom of Holland
Manufacturer 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:—
The object of this invention is to construct a machine for connecting the edges
of metal plates by folding, said machine being suitable for use in making tins or
cans for packing fruit or other matters.
The machine comprises two blocks or parts, one of which is movable to and from
the other, one of said blocks forms the support for the plate or plates to be bent
and is preferably made projecting from the general frame of the machine so that it
may be encircled by a plate the opposite edges of which are to be fastened together
and said plate be removed after such fastening. In this supporting block are two
rails, lying along the length of said block, the one a fixed rail and the other a
movable rail supported on or by springs which tend to raise the rail. In the other
of two blocks are three rails the central one of which is movable back and forth in.
the plane of its breadth to and from the fixed rail in the first block and serves as a
die with the latter as a matrix. The other two rails in this block are pivoted to
oscillate to and from the central rail with which they are parallel and one of 'them
is likewise movable back and forth in a plane parallel to the aforesaid die rail.
This latter movable rail and the die rail are moved at the proper times by eccentrics
or other equivalent parts of the machine being normally held out of action by
springs.
The two blocks are in relative position so that the five rails above mentioned
operate together in the following manner.
The edges of the plate or plates to be connected are inserted from opposite sides
between the two blocks the upper edge under the die rail and against the side of
the movable rail next thereto, the other above the matrix rail and against the inner
side of the rail next thereto. The die rail and movable rail next thereto are then
lowered, the die rail bending the edge of the upper plate down at right angles over
the edge of the lower movable rail and the movable rail next to the die rail forcing
the lower plate into a recess in the matrix rail by which same is bent slightly
downward and then upward at right angles, this upward bend being within the
downward bend in the upper plate, the die rail is then drawn up and the blocks
approached, the oscillating upper rail and movable lower rail then move the upper
plate inward bending the edge to a more acute angle against the inner face of the
other upper movable rail and also operating to the same result on the lower plate
by the pressure of the latter against the inner face of the lower movable rail. By
this means the edges of the plates are hooked together over the matrix rail, the die
rail then descends again and presses the edges firmly together on the matrix-rail
setting in the joint also flush with the outer face of the plates.
The accompanying drawing illustrates part of a machine constructed to connect
plates in the manner above described.
The five steel rails a b c d e of particular shapes of cross section are arranged
parallel next and opposite to one another in their first position as in Fig. 1. The
rails a band d are located in the carrier v which is guided vertically in a straight
line Figs. 5 and 6. In said carrier the rails a and.d are also vertically.movable;
on the latter rest the stampers and g Fig. I driven by the eccentric discs 2 and 3
which are keyed on the shaft u, Fig. 6.
The carrier is depressed by the eccentric disc 1 on said shaft. The helical
springs on which the carrier is suspended hold the latter against the disc 1, and
the spiral springs i and k hold the rails a and d against the discs 2 and 3 said springs
engaging with the pins a¹ and d¹ respectively Figs. 5 and 6.
The rail e is securely bedded on the cylindrical stamper support w and the rail c

page_text: is kept vertically in this stamper support w and is supported in an elastic manner by
the springs 1.
The metal sheets y and z which are to be folded together are introduced between
the working edges of the rails until the sheet y lies in the recess in the side of the
rail e and the sheet z touches against the rail a.
C
With an engaging and disengaging gear known in punching machines, the shaft u
is rotated. The carrier is pressed down upon the rotation of the shaft u within
the second quarter of its rotation so that the metal sheets are wedged in between
the rails. At the same time the eccentric discs 2 and 3 cause a special downward
motion of the rails d and a. The latter rail a bends downwards at right angles the
edge of the sheet over the sharp edge of the rail c Fig. 2, on the other hand the
rail a bends the sheet y into the matrix rail e.
The shaft u now arrives at the third quarter of its revolution. The rail d rises
again. The rail a stops but the carrier with the rail is lowered. The latter then
presses upon the rail c and its spring support 1. The rail c is thus pressed deeper
into the stamp support w and this action is accompanied by a lateral movement
caused by the projection e' by which movement the edge of the rail c moves against
the rail a Fig. 3. By these movements the angularly bent sheet edges are placed
one into the other as in Fig. 11.
When the shaft u arrives in its last quarter rotation the rail a rises again. The
rail descends still further and is followed by the stamp rail d.
The projection on the rail e falls into a corresponding groove into the recess
of the stamp support w for the spring m presses the rail c in that direction.
The edge of the rail c is removed from the fold of the edge of the sheet = and
the edge of the rail a is withdrawn from the fold at the edge of the sheet y by
reason of a projection 2 on the descending rail d leaving the recess in the side
of the rail a so that the rail a is pressed laterally outwards Fig. 4. This lateral
motion is allowed to the rail a because it is guided and suspended by pivots in slots
in the plates p on the ends of the carrier » Figs. 5 and 6, the rail is also suspended
in the plates p by the pivots b' so that said rail b can also move laterally when
the rail c moves inwards with the sheet 2 wedged between the two rails c and 6 Fig. 3.
When the edges of the rails a and c have left the folds in the plate Fig. 11 the
stamp rail d descends and presses the edge folds together into the groove recess in
the matrix rail e.
The fold is closed and pressed thereby and pressed out into the usual folding
shape towards the one side of the metals Fig. 11.
When the shaft u has completed its revolution it remains stationary and the rails
arrive in their starting position Fig. 1.
For folding together the opposite edges of a metal sheet, the latter may be
wound around the stamp support cylinder w, and be removed from the same
towards the front as a metal cylinder after the formation of the fold. In place of
the eccentric discs on the shaft u selected here for the easy comprehension of the
device, any other equivalent mechanism used in presses for irregular stamping may
be employed.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed declare that what I
claim is:
For forming and closing a fold on two straight metal edges which are to be
connected together, an instrument or tool comprising five especially profiled
rails a b c d e coacting together to bend and insert the edges of the plates one
into the other and close the joint substantially as herein set forth.
Dated this 17th day Atran1001
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.