Improvements in and relating to Machines for Printing Envelopes, Envelope Blanks, and the like.
Year: 1896

page_text: Date of Application, 22nd Dec., 1896-Accepted, 6th Mar., 1897
COMPLETE SPECIFICATION.
Improvements in and relating to Machines for Printing Envelopes,
Envelope Blanks, and the like.
I ERNST FISCHER of Wertherhofstrasse 3 Barmen, Germany Owner of the
Firm Julius Liebhardt & Co., 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:-
This invention has reference to the printing machine patented in Great Britain
under No. 12471 in the year 1896 and it has for its object to improve and simplify
the construction in the said patent by which the printed envelopes are turned out
of the machine.
Since this operation has been hitherto made by an endless band and a bellow
it was not possible to get the envelope down to the band with the right side and
it often happens that a sheet comes to lay on said band with the printed side.
The essential feature of this invention is therefore a peculiarly oscillated or
otherwise moved finger which takes away the envelope or sheet from the printing
roll in a manner as this would be done by the hand of a labourer and brings it to
the place where the finished pieces are gathered.
The particular features in which this invention consists will be hereinafter more
fully described and pointed out in the claims at the end of this specification.
On the accompanying drawing
Figures 1 and 2 are views of the printing machine seen from right and left side
but only of the front part which for the understanding of the invention is of
importance;
Figures 3-6 show the main details of the seizing arrangement for the printed
blanks;
Figures 7 and 8 illustrate the working of the finger and its appertainings; and
Figure 9 shows in an enlarged scale the construction of the finger.
Similar letters of reference indicate corresponding parts.
As stated above the improved printing machine is only so far illustrated and
their known parts so far mentioned as it is required for the sake of a better under-
standing of the working of the new inechanisms, the reference letters being partly
the same as in Patent No. 12471.
The pricting roller 11 which is lodged in the framing is of somewhat other
construction as those of Patent No. 12471.
It is provided with a deepened portion a' into which is arranged a bar 110" to
which are fastened the nippers 110.
The bar 110 engages by means of the wheel 108 with the toothed lever 105, 107,
which in engagement with the cam disks 120, 121 serves to oscillate the bar 110*
and press the nippers 110 down on the circumference of the printing roller 11 or
lift them from the same according to the shape of the cam disks 120, 121.
When the nippers are lifted the blanks are fed to them in a known manner and
then the nippers go down and bold the blank fast on the roller 11.
The roller 11 is now turned about of one revolution so that the printed blank
hangs downwards in front of the machine in order to be taken away from the
roller; Fig. 6.
For this purpose the blank must be lifted a little from the roller so that a finger,
which will be described hereafter may grasp it.

page_text: In order that the blank when being lifted is prevented from falling down, spring
tongues are arranged which are fastened to a bar a. The bar a is lodged
movable in the deepening ; at one end it is fitted with a lever c which is
connected by a bar d with a lever c 1, lever c 1 has outside of the roller 11 a curved
lever d1, lever d 1 engages a projection e.which is fastened to the framing of the
machine and acts the bar a to swing. The spring tongues & meeting with their
points the blank borders from below are caused by their own elasticity to press
the blank against the nippers so that the blank is held by both when it is lifted
from the roller by 108, 105, 107, 120, 121 which movement the spring tongues are
enabled to follow..
However the latter are made to release the blank after being grasped by the
finger, the operation of which is done by the described, levers c, d, cl, d1 and the
projection e.
The finger Z or lock consists of a special arrangement of parts equal in working
like a door lock. The finger is shown in Figure 9 in an enlarged scale.
On a plate or between two plates frespectively which carries at its front end an
angular piece g is guided by a rod r and a pin rl the bolt,, which may slide on the
plate f.
The bolt is provided with a projection 1,, a latch i turning round a bolt il
engages said projection and is kept in its normal position by a spring m. Between
the plates is also arranged a box k so that it can be turned, it has two exten-
sions 1, k2, the first one laying in a cut out place of the bolt, the other one
touching the latch i.
The operation of the mechanism is as follows. In normal position the edge h2
is somewhat removed from the shank g1 of the angle piece g; when now the
apparatus is brought in contact with the blank in such a way, that the blank
reaches into said free place between 2 and g 1, the nut k is turned so that its
extension k 2 presses down the latch in order to free the bolt from the latter and
allow it to slip forwards, which is done by means of a spring 1. The edge h 2
meets then the paper, presses it against the shank g 1 and keeps it in this position
till the whole apparatus is withdrawn. When this is done the paper must be
released. For this purpose the nut k is turned in. the contrary direction as before
so that its extension k 1 is brought in contact with the corresponding edge in the
bolt h which is so far withdrawn till the latch can slip back in its first or normal
place.
.
The paper is then released and gathered into a basket or box..
The manner in which the finger is brought in contact with the blank which
hangs down the printing roller may be best understood from Figures 7 and 8 and
the following description.
To the shaft 85 which carries the levers 86 for operating. the blank shifting
mechanism are keyed opposite each other the double arined levers n. At their top
ends they are united by a rod r which carries the finger. or grasping apparatus Z
described before; a second rod s running from one lever n to another passes the
box k of the finger or lock and serves to operate the same in the manner
aforesaid.
The rod is provided with a levert which by means of a connecting bar u is
engaged with an angle lever v which is pivotted to one of the levers n. The angle
lever has a pin w and according as this pin is pushed from left or right side
motion will be transferred by the bar u and lever t to the rod s which thus is turned
forwards or backwards and the finger will be correspondingly operated.
The opening and the closing of the same must of course be done in both extreme
positions of the levers n which are for this purpose intermittently moved by a crank
disks q situated on the printing roller shaft and connecting pieces o, o 1.
When the apparatus is in contact with the paper the pin w engages with a bar
that pushes it forward so that the nut may be turned and the paper is grasped.
When the apparatus however is withdrawn from the printing roller a bar y

page_text: being fitted with a pin yl acts upon the pin w and draws it backwards in con-
sequence of which the bolt h is also withdrawn and the paper released for being
able to fall down.
The bars x, y are actuated by levers z to which they are pivotted, said levers
being in engagement by means of arms 61 Fig. 1 with excentric disks a 1 which
oscillate the levers z according to the shape of their circumferences.
From the foregoing description and the drawing it will be learned that in this
improved machine the blanks or sheets of paper are taken away from the printing
roller with security without the risk of the taking off of a paper with the wrong
side.
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.) In a machine for printing envelopes, envelope blanks and the like the
printing roller 11 with the nippers 110 on shaft 110 combined with the spring
blades bon shaft a and means, substantially as described to oscillate said shafts.
(2.) In a machine for printing envelopes, envelope blanks and the like the
apparatus for grasping the papers consisting of the slipping bolt h in combination
with the angle piece g, g' the latch i, the box k with extensions k 1, k 2, springs l, m.
and means to operate the same substantially as described.
(3.) In a machine for printing envelopes, envelope blanks and the like the
levers n in combination with the bars r, & and t, u, v combined with the rods x, y
the levers z arms and cam disks 61, a 1 substantially as described.
Barmen, this 19th day of December 1896.