A Machine to Punch and at the same time to Cut Strips of Tin, with a Device to Release the Perforated Tin Sheet Adhering to the Perforators.
Year: 1899

page_text: Date of Application, 10th Mar., 1899
Complete Specification Left, 1st Nov., 1899-Accepted, 27th Jan., 1900
PROVISIONAL SPECIFICATION.
A Machine to Punch and at the same time to Cut Strips of Tin, with
a Device to Release the Perforated Tin Sheet Adhering to the
Perforators.
I, MAX KOCH, Manufacturer, residing at Dresden, Kingdom of Saxony, Elisen-
Street, No. 54, do hereby declare the nature of this invention to be as follows:-
:--
The invention here described relates to a machine to punch or perforate
tin-sheets and at the same time to cut them into strips; the strips are afterwards
to be cut by another machine into shorter pieces to be used in this shape as claps.
to fasten or joint the corners of paste-board boxes.
The machine has the great advantage of possessing a positively sure and exact
mechanism to hold the tin-sheet on the working table and to release the perforated
tin-sheet adhering to the perforators. On the accompanying drawings the machine
is shown as follows:-
Eig. 1 shows the front view;
Fig. 2 shows the side view;
Fig. 3 shows the section.
The machine consists of two standards
of the cross-pieces a
which are joined to a frame by means
A stamping block 6 plays between the standards a.
The stamping block carries on its lower side the cutter and the rail pl
provided with the perforating points and stands in loose connection with the
ruler e, which is the contrivance which releases the perforated tin-sheet when
adhering to the perforators. The perforators pass through the holes of the
ruler which lies under the rail ; whilst the cutter works against the counter-
cutter like scissor-blades.
C
On the outside of the standard there is an arm g which is fastened to the
stamping block b, and is so arranged that its position can be changed in the
vertical plane. Against this arm the roller f and the bolt e are pressed by means
of a spring d. The stamping block is moved vertically by the eccentrics i,
the eccentrics are connected with the stamping block by the eccentric rods.
Draught-springs are fastened by one end to the carriers and by the other
end to the guiding-blocks of the ruler e to hold the ruler in loose connection
to the stamping-block or to draw it against the same.
The machine is set in motion by the axle 7, which is driven by any motive
power; the axle drives also the axle k by means of cog-wheels marked " and ¹.
The working of the machine and particularly of the ruler c is as follows:
The tin-sheet to be perforated and cut is laid upon the table m and pushed
forward by the workman until its edge touches the rail o.
The tin-sheet is held by the perforators on the downward movement of the
stamping-block b. and then according to the different length of the perforators
punched or perforated; at the same time the cutter r and the counter-cutter l
DO77

page_text: cut a strip from the tin-sheet, but this is the already perforated, strip in front
of the last perforated one, or the furthermost not at all perforated one.
On the then following upward movement of the stamping block 6, the sheet
of tin remains adhering to the perforators of block to a certain point, that
is to where the perforators retire through the ruler e..
As soon as the last perforator has passed through, or better said into the ruler e,
the sheet of tin falls on to the table and is again pushed forward.
This is repeated until the entire sheet of tin has been perforated and cut. Why
the ruler cannot follow at once the stamping bock on its upward movement
is due to the square head cof the bolt c which in the descent of the stamping
block b, falls into the slot of the ruler & by the force. of the spring e.
When the tin-sheet is freed from the adhesion to the perforators 7, and the
arm has reached the point, where through its oblique shape and its upward
movement with the guiding block it frees the ruler from the pressure of the
spring by pressing the stop boli e out of the slot of the ruler e the ruler e
is then forced or drawn by the springs upward and lays itself against the guide
block b.
Das this 441x
1200
FELIX F. LOEPER,
Dresden, Agent for Applicant.
A Machine to Punch and at the same time to Cut Strips of Tin, with
a Device to Release the Perforated Tin Sheet Adhering to the
Perforators.
MAX Kocu, Manufacturer, of No. 54, Elisen-Street, Dresden, in the Kingdom
of Saxony, 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:-
My invention relates to a machine for punching or perforating tin-sheets and
at the same time cutting them into strips; the strips are afterwards to be cut
by another machine into shorter pieces to be used in this shape as clasps to fasten
or join the corners of paste-board boxes.
My improved machine has the great advantage of possessing a positively sure
and exact mechanism to hold the tin-sheet on the work table and to release the
perforated tin-sheet adhering to the perforators.
In the drawings left with my Provisional Specification and herewith, the
machine is shown as follows:-
Figure 1 is a front view,
Figure 2 a side view,' and
Figure 3 a transverse section thereof.
Figure is a similar view to Figure 1, showing a modification of my improved
machine.
The machine consists of two standards which are joined to form a frame by
means of cross-pieces w¹. A stamping block or head moves between the
standards a².
The head is provided on its underside with a shearing-blade or knife r and
with a bar p bearing perforating-pins or punches p and is loosely connected
with an ejector or stripper c, which releases the perforated tin-sheet when adhering
to the perforating pins. The perforating pins or punches 7 pass through holes
in the bar which lies beneath the bar ; whilst the blade works against a

page_text: second shearing blade or knife, these two knives acting in a similar manner
to the blades of a pair of scissors.
The stamping-head is moved vertically by eccentrics, which are connected
to the stamping-head by the eccentric-rods
.
The machine is set in motion by a shaft, which is driven by any motive
power the shaft drives an axle bearing the eccentrics by means of cog-
wheels marked and ¹.
In recesses in the head b, are draught-springs which are secured at one end
to carriers and at the other end to the guide-blocks d of the ejector or stripper
to hold the ejector or stripper in loose connection with the stamping-head 6 and
draw it towards the same.
On the outside of the standards a there is an inclined arm (or arms g) which is
fastened to the stamping head b, and so arranged that its position can be adjusted
in a vertical plane. Against this arm (or arms) a roller or rollers and bolt
or bolts el are pressed by means of a spring . These bolts e act as detents to
hold the stripper e back for a predetermined time during the upward motion of
the head b, as hereinafter described.
The operation of the machine, and more particularly of the ejector or stripper ç,
is as follows:-
The tin-sheet to be perforated and cut is laid upon the table m and pushed
forward by the workman until its edge touches the rail or stop o.
The tin-sheet is acted upon by the perforating pins or punches on the down-
ward movement of the stamping head b, and is then punched or perforated sooner
or later according to the different lengths of the perforating pins or punches p:
at the same time the knives and cut a strip from the tin-sheet, but this is the
already perforated strip in front of the last perforated one on the further or
the furthermost not at all perforated one.
On the then following upward movement of the stamping-head b, the sheet
of tin remains adhering to the perforating pins or punches on the head
to a certain point, that is, to where the perforating pins p retire through the
ejector or stripper c.
As soon as the last perforating pin has passed through or into the ejector or
stripper, the sheet of tin falls on to the table and is again pushed forward.
This is repeated until the entire sheet of tin has been perforated and cut.
The reason why the stripper e cannot at once follow the stamping-head on its
upward movement, is that the square head e of the bolt e', in the descent of the
stamping head b, falls into a slot in the stripper-bar by the action of the
springe
t
When the tin-sheet is freed from the adhesion to the perforating pins p, and
the arm has reached the point, where through its oblique shape and its upward
movement with the head b, it frees the stripper from the pressure of the
spring by pressing the stop bolt el out of the slot in the stripper c the stripper c
is then forced or drawn upward by the springs and lays itself against the
head b.
In the machine shown in Figure 4, the stripper has no connection, not even
a loose one, with the punching or stamping head b, does not require to follow this
nor to be separated therefrom by a special arresting device.
The perforated stripper c is here arranged in connection with the work table m
by means of bolts S. These bolts serve simultaneously as guides for the springs t
fitted thereon and to hold the said stripper yieldingly at a certain height over the
work table.
The heads of the bolts S prevent the stripper from moving upwards further than
necessary.
The operation of the machine fitted with this form of ejector or stripper is as
follows:-
The sheet of metal to be worked is pushed onto the work-table m of the machine
until it strikes against the stop-bar or flange o.

page_text: In the downward motion of the head b, which now takes place, the pins or
punches first enter into the perforations in the stripper e, the head then strikes
against the upper side of the stripper c', which rests on the springs t, presses it
down onto the sheet of metal, punches it by means of the pins or punches p
passing further down through the apertures in the stripper. It then commences
to return, carrying upwards with it the sheet metal, which remains hanging to
the pins or punches, until the stripper has reached its highest point, and
strips the sheet-metal from the pins or punches by its resistance.
This punched or perforated strip of the sheet of metal is separated,
in punching, from the next row by means of the knives
stripper can be mounted on the frame over the table instead of on the table;
or even on the head, which however would not be so advantageous here.
The
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. A machine for the manufacture of perforated or punched metal strips
wherein bolts or detents hold a yieldingly supported ejector or stripper-bar,
provided with holes for the pins or punches, in engagement, during the upward
motion of the stamping head, with the sheet of metal until the pins or punches
have passed out of the said sheet and an inclined arm has pressed back the said
bolts or detents so as to release the said ejector or stripper which then moves
back under the action of springs, substantially as described.
2. A modification of the arrangement claimed in the preceding claiming clause,
wherein the stripping-bar or stripper is yieldingly supported on the work-table
or on the frame of machine above the said work-table at a sufficient height for
the passage thro
e sheet of metal, substantially as, and for the purposes,
hereinafter descri.
3. The improved machine cor »³. reied substantially as described with reference
to either of the forms or modifica ms shown in the accompanying drawings,
for the purposes specified.
1
Dated this 28th day of October 1899.
FELIX F. LOEPER,
Agent for Applicant.