Improvements in Machines for Stamping Boxes, Dishes, and the like.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Machines for Stamping Boxes, Dishes, and
the like.
We KARL RICHTER of 19 Stiftsgasse Hernals near Vienna, Austria, manager of a
factory of pasteboard goods and ISIDOR LÖWIT and ERNST LÖWIT of the same place
proprietors of the said factory, 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 :-
This invention relates to that class of machines or presses in which suitably cut
sheets plates or blanks of material are pressed or stamped into the desired shape
between suitable dies.
The invention has for its object so to construct such a machine or press that the
sheets or blanks are automatically fed into the female die or matrix and the stamped
articles automatically expelled from the machine.
For this purpose the fixed female die, in line with which the male die reciprocates
is combined with a passage at right angles to the axis of the said dies and opening
laterally into the mouth of the female die, a slide reciprocating within the said
passage and a receiver adapted to contain a number of sheets or blanks and opening
into the said passage; the pile or a number of sheets or blanks being constantly
forced toward the said passage.
In order to make the invention fully understood the same is hereinafter described
with reference to the accompanying drawings in which Figure 1 is a top view or plan
of a twin or duplex machine embodying the invention, while Figure 2 is a perspective
view of this machine.
The press shown being a twin or duplex press in which identical operations are
going on in each half, the main driving shaft a is arranged in the middle of the
machine; it will be readily understood, however, that presses may be made and
operated comprising one-half only of the press shown.
sg
g
The shaft a carries an excentric c having flanges formed on its edges, and turning
in an oblong or oval eye or ring d made integral with the rods g carrying the male
dies. In consequence of this arrangement the ring d and rods g will be reciprocated
horizontally or end wise without any lateral or vertical displacement. The die rods.
guided by the bearings e are provided with interchangeable or change heads or male
dies h which, on the ring d and rods g being reciprocated, enter the female dies i
mounted in cylinders ; and adapted to be adjusted therein by means of screws f.
While performing their to and fro motion, the male dies or stamps h slide through
interchangeable and adjustable rings k against which the stamped article strikes being
carried along by the retrograding stamp h and stripped off by the said ring k when
the article falls through an aperture in the base plate of the machine and is thus
discharged from the latter.
For the automatic supply of the material to be pressed a lateral extension of the
die cylinder is provided with a flat passage in which a slide or draw plate o
reciprocates. This slide is interchangeable and by inserting into the said flat passage
smaller or broader bars its height may likewise be adjusted so as to adapt it for feeding
through the same suitably cut sheets or blanks of material of different sizes.
The said slide o is connected with a crank of the shaft a by a link m and a sliding
bar n, these parts so operating the slide that it pushes a piece of material into the
female die i while the male die is being withdrawn for stripping off the article last
stamped. The movements of the reciprocating sliding barn are transmitted to the
slide o by means of the slotted arms 99' of a bell crank lever secured to a shaft u and
adapted to have their position adjusted by means of a set screw t passing through a
curved slot. In order to provide for the exact guiding of the slide o the same has its
extension rod r surrounded by a bearing s.

page_text: -
Into the passage wherein works the slide o opens a holder or receptacle containing
a pile or number of the sheets of material to be pressed into the desired shape. This
holder is open at top to an extent sufficient for admitting of its being filled with blanks
of material at any given moment. In the said holder or receptacle works a
piston w' having its rod w connected with a weighted lever whereby the piston w¹
is constantly forced toward the pile of blanks so as to cause the foremost of them to
enter the passage wherein the slide o works every time this latter is sufficiently
removed from the female die i. Instead of connecting the piston wl with a weighted
lever the same may be directly weighted with a coiled spring interposed between it
and the end of the receptacle v.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In a machine or press for stamping boxes dishes and the like from suitably
shaped sheets or blanks, the combination with a fixed female die, a male die movable
endwise and mechanism for reciprocating the male die, of a passage or guideway at
right angles to the axis of the dies and opening laterally into the mouth of the female
die, a slide adapted to be reciprocated within the said passage and a blank holder
opening into the said passage and containing a weighted piston by which the foremost
of a pile or number of blanks is caused to enter the said passage every time the slide
uncovers its lateral opening, substantially as and for the purpose set forth.
2. In a machine or press for stamping boxes, dishes and the like from suitably
shaped sheets or blanks, the combination with a driving shaft of an excentric secured
thereto, an oblong or oval ring surrounding this excentric and carrying two
diametrically opposite rods, male dies secured to the free ends of the rods, and two
female dies adapted to be entered by the reciprocating male dies, substantially as and
for the purpose set forth.
3. In a machine or press for stamping boxes, dishes and the like from suitably
shaped sheets or blanks, the combination with the driving shaft of a crank secured to
the same, a link connecting the crank pin to a sliding bar, a slotted bell-crank lever
one arm of which is actuated by the said sliding bar, and a slide or draw-plate
reciprocated by the other slotted arm of the said bell-crank lever, substantially as and
for the purpose set forth..
Dated this 26th day of November 1880
J. C. MEWBURN,
55 and 56, Chancery Lane, London, Patent Agent.