Improvements in Machines for Making Envelopes.
Year: 1891

page_text: Date of Application, 5th Nov., 1891-Accepted, 5th Dec., 1891
COMPLETE SPECIFICATION.
Improvements in Machines for Making Envelopes.
I, HEINRICH DANGER of 56 Bachstrasse Hamburg, in the Empire of Germany,
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 a machine for making envelopes, which mainly
and essentially differs from the known machines of this class by the device for
folding or breaking the four sides of the envelopes. This device of the machine
which is actuated by a tred lle effects with one treading the simultaneous breaking
of all four sides of the envelope. The bodies causing the breaking, riz. slides,
which are moved to and fro by a disc with eccentric slots, can be lubricated
without the lubricant coming in contact with the paper to be worked on the
machine, which constitutes a material advantage over the known machines working
with flaps, in which these bodies wear rapidly in their bearings, as, they cannot
be lubricated. The adjusting of those parts of the machine, which allow different
sizes of envelopes to be made, can be effected easily and rapidly, whereas in the
known machines this can be done only with difficulty and great loss of time.
Referring to the accompanying drawing
Fig. 1 is a front view
Fig. 2 a side view and
Figs. 3 to 6 represent details of the improved machine.
The die a forming a conic frame is actuated in the known manner in the guide c
provided at the arm b. The contrivance f for gumming the paper is movably
connected with the sliding part of the die. Below the die is provided a horizontal
plate having four guides 9 g go and a rectangular recess h, on which plate
four slides are so arranged as to be displaceable in said guides. Each
slide has a pivot k provided with friction roller. Said pivot projects through a
slot arranged in the middle of each guide and is influenced by a disc n revoluble
below the stationary plate h' about pivot m by means of eccentrically arranged
guide slots o when the disc is being turned. This is effected by means of a cord
secured to the circumference of the disc and guided over pulley to, and
connected with, lever q by depressing the treddle r, the spring s, secured with
one end to the circumference of the disc n and with the other to the frame of the
machine being thereby stretched.
Lever like the eccentric disc t, is rigidly secured on the loose shaft u lodged
below disc n and actuated from the treddler by means of draw rod v.
The pivot m
has at the top the quadrangular pressing plate w, which fits exactly into the
recess of plate, and at the bottom a friction roller a, against which abuts
at the given moment the eccentric disc t of shaft u, thereby moving pivot and
plate upwards. The covering plate omitted in the drawing has adjustable blocks
serving as ruler for the paper cut to a certain shape, which is thereby always
given the same position under the die.
The improved machine works as follows:
The single leaves of the paper cut to a certain shape are laid between the four
properly adjusted blocks of the covering plate having a recess corresponding to
the size of the envelope to be made, and then the die a with the gumming
device is lowered by pressing down the lever e. The slides occupy the
position shewn in Fig. 4 while lever q and treddler occupy the position drawn
in full lines in Fig. 2. On releasing the lever e and subsequently pressing down
the treddle, the disc n is turned in the direction indicated by an arrow, Fig. 3,
whereby the slides are caused to advance towards the middle. The peculiar shape

page_text: of each of the slots o causes first the narrow sides, then the gummed side and
ultimately the closing side of the paper or envelope to be broken. At the same
time the eccentric disc t produces a pressure on pivot m which consequently lays
itself with its top plate w from below firmly against the broken envelope, which
thereby receives sharp outlines. When now the attendant takes his foot off the
treddle, the previously stretched springs draws the disc back into its original
position, Fig. 4, whereby also the slides are moved back by means of pivots k sliding
in the slots o and I, and pivots m with pressing plate to somewhat descend by
their own weight. The finished envelope is now taken out and a new paper
laid in.
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 is:
A machine for producing envelopes, in which the folding or braking of the four
sides is effected by four exchangeable slides i of different shape, which slide on a
horizontal base plate and are provided with pivots k, being according to require-
ment shifted forward or backward by means of these pivots in slots of the base
plate by a disc n provided below the same with four eccentrically arranged
slots 0, the disc being once actuated from the treddle by cord, lever and draw rod
and the other time by a spring s, while its turning pivot m with pressing plate to is
simultaneously lifted, on the closing of the slides, by an eccentric disc t provided on
shaft u, for the purpose of pressing the broken edges of the envelope, substantially
as set forth.
1
1
T
1
1001
H. DANGER.
By Huelser & Co.,
his Agents.