Improvements in Machines for Fixing Metal Stapling Strips.
Year: 1894

page_text: COMPLETE SPECIFICATION.
Improvements in Machines for Fixing Metal Stapling Strips.
A communication from EMIL SALTZKORN, Consul, and LUDWIG NICOLAI,
Manufacturer, both of Lobtauer Strasse 20, Dresden, Saxony, German Empire.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent, 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 subject of this invention is a machine for fixing and cutting off metal strips
for scaming cardboard, leather and the like, and for joining the edges of cardboard
boxes. The machine is provided with automatic feed for the metal strip to be
applied and fastened. This is obtained by pins working in vertical guides laying
hold of the leading end of the piece and drawing it forward to a point corresponding
to what is to be the length of the strip. By means of adjustable thrust-rods in
combination with a system of levers, which raise and lower the pins which lay hold
of the strip, the said pins after passing from the elevated into the lowered position,
are thrust forward together with the strip, after they have laid hold of the latter.
On the accompanying sheet of drawings, the machine is shown in side view, in
the position of rest in Figure 1, and in the working position in Figure 2, while
Figure 3 shows a plan of the sheet-metal strip to be fixed and cut off.
On a block 1 an arm 3 carrying an anvil 2 is secured; and over it is placed the
arm 4 on which the head-piece 5, carrying the pins 6 reciprocating up and down
for the strip-feed, is moved to and fro by means of the adjustable lever-system
operated by the movable hammer 8. At the end of the arm 4 is carried the
knife 9 (Figure 2) for cutting off the strip and the fixing stamp or die 10. This is
fitted on one side with grooves which engage with guides on the head-piece 5.
A spring secured to the head-piece 5 and the stamp or die 10 raises the latter after
each descent. The hammer 8 is mounted on the block 1 so as to rotate on a bolt,
and is drawn down by the draw-bar 11 of a treadle. The head of the hammer
consists of two parts 13 and 14 held together by a coiled spring 12; and of these
the one part 13 is fixed and serves to depress the fixing stamp or die 10 while the
other 14 is mounted on the first so as to turn on a stud (y) and serves to depress
the knife 9, with which however it remains in contact for a short stroke only, being
diverted therefrom by the action of a roller 15 which it carries, and which strikes
against an oblique projection or tappet (forming part of the headpiece 5) by which
it is displaced or caused to deviate as shown in Figure 2.
The sheet-metal strip a of any desired length passes over the guide-roller 16 and
is pressed against the underside of the arm 3 by the blade-springs 17 and 18 and is
laid hold of by the pointed pins 6 over the fixed table-plate 19, the said pins
engaging in the foremost of the holes with which the strip a is provided or in the
indentations of its edges (Figure 3). The guide 5 carrying the pins 6 and the
system of levers 7 have assumed, meanwhile and occupy at the moment the positions
indicated by the dotted lines in Figure 2.
If now after the hammer has been depressed by means of the treadle and
drawbar 11 it is released, the lever-system 7 thrusts the guide 5 forwards whereby
the sheet-metal strip is simultaneously drawn forwards by the pins 6.
As the hammer continues to descend a pin 20 mounted on the hammer-arm 8 in
such manner as to be movable under the action of a spring, encounters the arm 21

page_text: of a lever pivoting on whereof the other arm 22 has the pins 6 hung on to it,
which are therefore raised by the depression of 21 and thereby disengaged from the
sheet-metal strip a. When the hammer-arm 8 rises, the pin 20 and lever-arm 21
remain for some time longer in contact owing to the action of the previously com-
pressed coiled spring attached to the pin so that the pius 6 remain raised during the
back-stroke of the guide 5, until when in their original position, after the pressure
of the pin 20 on the lever-arm 21 has been taken off, the blade-spring 23 raises the
lever-arm 21 whereby the pins 6 are again depressed and engage with the
sheet-metal strip a once more.
The lever arms being provided with slots so that their relative positions can be
adjusted and regulated at pleasure the length of travel of the pin-guide 5, and
consequently the length of the sheet-metal strip-feed, can be altered, within certain
limits.
The sheet-metal strip thus fed forwards passes in a longitudinal groove or
grooves in the under surface of the fixing-die 10. By the blow of the falling
hammer the knife 9 is first struck by the part 14 of the hammer-head pivoting on y,
so that the sheet-metal strip is severed. But when the roller 15 secured to the said
part 14 encounters the oblique projection 24 on the arm 4, 14 is caused to deviate
so as to release the knife 9 which at once springs up again, by the reaction of an
internal spring. The fixed part 13 of the hammer-head drives down the fixing
die 10 for the purpose of uniting the sheet-metal strip, cut off by the knife, with
the material laid on anvil 2, by the penetration of sharp points or jags punched in
the sheet-metal strip. Inasmuch as the end of the sheet metal strip must coincide
with the edge of the anvil it is necessary that, when any alteration is made in the
length of feed, the anvil must be altered to correspond which must be done by
substituting a longer or shorter anvil.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondents, and in what manner the
same is to be performed, I declare that what I claim is :-
A machine for fixing and cutting sheet metal strips with. automatic. adjustable
feed for the strips characterized' by ;-
I. A guide (5) sliding on an arm (4) operated by an adjustable system of com-
pound levers the said guide (5) carrying pins (6) which lay hold of or engage with
a strip (a) the pins (6) on the descent of the hammer arm being raised by a spring
pin (20) brought to act upon their lever (21, 22) simultaneously with the completion
of the return stroke of their guide (5) and the said pins being again depressed for
engaging anew with the strip (a) after their return to their original position of
rest; and
II. A divided hammer-head whereof the movable part (14) drives down the
knife-blade (9) to cut the strip (a) but by a roller (15) encountering a projection (24)
caused to deviate so as to cease to act while the other or fixed part (13) of the
hammer-head drives down the fixing die (10).
2
F
Substantially as described and illustrated in the accompanying drawings.
Dated this 17th don of
W. P. THOMPSON & BOULT,
Agents for the Applicant.