A New or Improved Bronzing Machine or Apparatus for Bronzing Paper or the like.
Year: 1892

page_text: Date of Application, 14th Nov., 1892-Accepted, 31st Dec., 1892
COMPLETE SPECIFICATION.
A New or Improved Bronzing Machine or Apparatus for Bronzing
Paper or the like.
I, JULIUS JAB of Frankfurterstrasse 123 in the City of Berlin 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 subject of this invention is a bronzing machine which works without the
production of dust and in which the consumption of the bronze is reduced to a
minimum while it is under the most perfect control and only so much bronze falls
upon the paper (or the like) as is absolutely necessary. Moreover strips of any
given breadth may be overlayed with more or less bronze so that a brilliant or flat
appearance is given to the surface.
The missing of the bronze or the spoiling and rendering useless of a sheet of
paper is obviated or reduced to a minimum with my machine as the impression is
only effected by a simple movement of the hand of the workman when the sheet of
paper is laid in its right position in the machine whilst after the completion of each
sheet the machine is automatically stopped.
Besides this no bronze can fall upon the paper until the front edge bas come
underneath the sifting box and it is under perfect control whether the sheet of
paper be short or long to put the sifting box out of working and so cause the
sprinkling of the bronze to cease immediately the back edge of the paper has
passed under the sifting box so that thus an unnecessary sprinkling as well as an
over application of the bronze is avoided.
Any superfluous bronze is taken off by rubber and polishing rolls in passing
through them and thrown by brushes into a catching box. The revolving paper
carrier is also kept always clean so that a smudging of the white under surface of
the sheet of paper is prevented.
The rubber and the rollers are adjustable and thus all sorts of sheets from the
thinnest tissue paper to the stoutest cartridge may be bronzed in this machine.
Through this adjustability of the roller moreover the bronze may be laid on of any
desired thickness and receive a greater or less degree of polish. The sheets are
thus delivered completely finished free from dust and covered with bronze from the
machine and no further bronzing operation is afterwards necessary thereon.
For facility of description I shall throughout refer to paper only-thereby
intending to mean any other suitable material capable of being bronzed in this
machine.
My novel apparatus or bronzing machine is represented in the accompanying
drawings.
Fig. 1 is a longitudinal section through the machine.
Figs. 2 and 3 represent the machine in two horizontal sections (i.e. Fig. 2 is a
plan on the line GH Fig. 1 and Fig. 3 is a plan on the line I-K Fig. 1) whilst
on the other hand Figs. 4, 5 and 6 are vertical cross sections viz. Fig. 4 is section
on line A-B, Fig. 5 on line E-F, and Fig. 6 on line C-B Fig. 1.
In all bronzing machines hitherto in use the spreading of the bronze has been
effected by means of a sifting box moving backwards and forwards or a so-called
agitator. The use of such apparatus has however proved uneconomical; altogether
apart from the fact that an immense amount of dust has been created which has
been very detrimental to the attendants working the machine.
In the present invention the bronze is placed into a box or holder 1 fitted with a
gauze bottom with meshes of the desired coarseness or fineness and the sprinkling
of the bronze is effected differently from the method hitherto in use inasmuch as by

page_text: means of a rotating cam shaft 2 which acts upon an arm 3 of the head 35 attached
to said sifting box 1 the latter is thereby lifted and then immediately let loose so
that an absolute falling down or jolting of the sifting box 1 must ensue whereby the
bronze is sprinkled through the gauze upon the paper which has been drawn
underneath the box 1. The driving of the machine is effected by a shaft 79 placed
under the machine by which by means of driving chains the chain wheels 4 and 5
as well as the rubber roller or pad 6 the rubbing and burnishing rollers 7,
and the disk wheel 10 situated under the shaft 79 are set in motion.
and 9
The paper to be bronzed is laid upon the table 11 placed in front of the machine
and pushed into the machine until it comes between both the open cheeks of the
gripper 12. The gripper 12 consists of two principal parts (the pair of nippers)
which are fastened to each other pivotally at 13.
At the side of this turning point runs the nipper with rollers 14 as well as at its
front and back ends with rollers 15 and 16 in the guideways 17 arranged at the
side of the frame. Further to the front and back of the gripper 12 the end of a
chain is attached which runs over rollers 4 and 5 and upon the revolution of the
latter draws the gripper along the course prescribed for it by the guide 17.
The gripper itself is shown in Fig. 1 in the position in which a sheet of
paper
can be laid into it. In this position there is in the guideways 17 a cutting into
which the gripper as soon as it arrives there with a back roller falls while the
front is pushed open by a spring. The hinder roller 16 of the gripper now strikes
against the under edge of the guide and rests upon a lever 18 which is held in its
place by a finger or projecting piece 20 on the cogwheel 19.
With this cogwheel 19 the toothed segment 42 of the lever 22 revolving round 21
is connected. This lever is prolonged downwards by the piece 23 whilst upon the
other end of the axis 21 upon which the lever 22 turns the short lever 24 is keyed
see Fig. 4.
This lever 24 acts upon a sliding piece 25 which is higher in its front part but
smaller at the back.
Upon the shaft 26 the wheel 27 is loosely mounted from which the driving of
this shaft 26 is effected. Inside upon the shaft 26 the chain wheels are rigidly
keyed over which the chain fastened to the gripper runs. On the nave or hub of
the chain wheel 27 is the tooth 28 against which is pressed (by a spring) a curved
or circular shaped lever 31 having its front end 30 hook-shaped.
The lever 29 is rigidly keyed or secured upon the shaft 26.
The curved lever 31 carries at its other end a roller 32 which is pressed by the
before mentioned spring against the sliding piece 25. When the sliding piece
occupies its right position it presses down the roller 32 and so brings the hook 30
out of gear with the tooth 28. On the other hand when the slide 25 is in its left-
hand position and its small part lies over the roller 32 the hook 30 is pressed by a
spring against the tooth 28 and caught by this so that thus the lever 31 and with it
the lever 29 (and thereby of course also the shaft 26 with the chainwheels 5 fixed
thereon) are set in revolution.
When the workman has laid the paper exact and straight upon the table and
pushed it between the cheeks of the gripper 12 he draws the upper arm of the
lever 22 towards him (i.e. to the left in Fig. 1) thereby
1. By means of the tooth segment 42 tooth wheel 19 projection 20 and lever 18.
high pressure is produced upon the back part of the gripper with its roller 16 so
that both the cheeks between which the paper lies are pressed together and the
same is held fast.
2. The before mentioned lever 24 pushes the slide 25 towards the left and thus
brings (in the manner already described) the hook 30 of the round lever 31 in gear
with the tooth 28 so that thus the chain wheel 5 and with by means of the chain
the gripper 12 is put in motion.
3. The lever 22 strikes against a pin or projection on a rod 33 thus pushing the 5
same towards the left which is pivotted to the lever 34 and thus by means of this
double lever 34 the rod 3 (carrying the sifting box 1 upwards and downwards in

page_text: vertical guides 36) is pushed towards the right and therewith the projecting part 35
(on said box 1) into gear with the cam 2.
Thus by separate and concurrent movements the paper is caught by the gripper 12
and the latter with the paper held by it is carried forwards and also the sifting
box 1 is put in upward and downward motion so that upon each descent some
bronze is sprinkled on the paper.
According to the fixing of the projection 35 which is fastened to the rod 3 by its
thumbscrew 30 the sifting box 1 can be more or less raised and therefore of course
falls down again a greater or a lesser distance and consequently it follows as a matter
of course that the greater the fall given to the sifting box 1 the more violently it
strikes upon the projection 31 underneath and the more bronze is shaken on to the
paper whilst with a less fall less bronze is deposited.
The disc 10 is also put in revolution by a chain wheel and has a semi-circular
formed opening 37 therein in which a two-armed lever 39 turning on the shaft 38 of
the disc 10 can be fastened by means of screw bolts and nuts. At one end this
lever carries a striking pin 41 which according to the position of the lever 39 in the
slit 37 of the disk strikes sooner or later against the under part of the lever 22 and
thus brings back the lever again into its original position. Upon the disc 10 a
scale is provided according to which the double lever 39 is so fixed in accordance
with the length of the paper that the pin 41 placed at its other end pushes against
the lever 22 as soon as the back edge of the paper has come underneath the sifting
box. Upon going back the lever 22 strikes again against a pin of the rod 33 and
thus brings (by means of the lever 34) the head 35 of the rod 3 out of reach of, the
cam 2 and thus returns the sifting box 1 to its normal position of rest so that the
sifting box 1 stands still and no more bronze is sprinkled.
At the same time by the operation of the parts 42, 19 and 20 the lever 18 falls
down so that when the gripper has returned to its original position it sinks down
with the back roller upon the lever 18 and opens.
When the gripper is set in motion by means of the chains running over the discs 4
and 5 (as previously explained) it strikes up against a catch 43 and lifts the same
so high that in its further progress it turns the flywheel 44 which has been hitherto
arrested by this catch by means of its rollers 15 and 16 a half revolution towards
the right. Thereby by means of the toothed wheel 45 fixed on to the same shaft
as 44 and the wheels 46, 47 and 48 the under bearing 49 of the rubber 6 likewise
makes a half revolution in order to make place for the passage of the gripper. As
soon as the gripper comes to stand under the rubber its rollers catch in the wing 51
of the under bearing 49 of the rubber 6 and turn the same back again into its
supporting position. By means of the toothed wheels 48, 47, 46 and 45 the fly-
wheel 44 is also turned back and the catch 43 is arrested.
The rubber 6 has an excentric placed over it (and fixed upon the shaft 53) which
gears into a rocking fork 54 fastened over the rubber and by means of the
revolution of the shaft 53 (by a chain wheel set on the outside or other suitable
means) set in backward and forward movement or rocked and thus the rubber 6
rubs the bronze upon the paper.
The rubbing and polishing rollers 7, 8 and 9 are fastened on the shafts 55, 56
and 57 respectively.
These shafts are journalled into both sides of the frame and carry alternately left
and right the excentrics or cams 58, 59 and 60 whilst on the other side they carry
chain wheels by which the revolution of these shafts is effected.
The cams 58, 59 and 60 run in gabs or bearings fastened to the frame so that
apon the revolution of the shafts and rollers the latter have a reciprocating lateral
motion imparted thereto.
The adjusting arrangements 61, 62 and 63 serve to press down the rollers
(according to their adjustment) more or less firmly on to the paper and to adjust
them to different thicknesses of paper and by heavier or lighter pressure on the
paper to give the bronze a brilliant or flat appearance whilst the object of these said
rollers themselves is further to rub the bronze sprinkled upon the paper while lying

page_text: upon and supported by the under supports 64, 65 and 66 and by gliding over it to
impart a polish and to take off the superfluous bronze. This (ie. any superfluous
bronze) is carried up along with the rollers and brushed off by the brushes 67,
68 and 69 and falls into the catching boxes 70 from whence it may be returned
into the sifting box 1. and used again.
The rollers 7, 8 and 9 revolve in the opposite direction to that of the movement
of the paper in order to effect a proper polishing of same.
It will be obvious that by this method the development of dust is prevented.
The under bearers or under supports 64, 65 and 66 must be made to turn in order
to allow the passage of the gripper and for this purpose they are provided with side
wings which are turned round by the action of the rollers 15 and 16 of the gripper
and thus turn the said wings a half revolution so that after the passage of the gripper
the under supports again support the paper and are arrested by the catches 72
previously lifted by the gripper and now again falling down. Upon this half
revolution the under supports are cleaned by the brushes 73 and thus present to
the paper travelling over them a constantly clean surface, so that the paper does
not become smeared.
The gripper 12 with the paper then pursues its course further in the guideways 17
until it comes to the point 74 (Fig. 1) where the guideway is rounded out or
recessed. Here by means of a spring attached to the gripper the roller 14 is pressed
down into the hollow 74 (it is to be remembered that the gripper now lies with the
upper part downwards) and thus opens both cheeks and so delivers the finished
bronzed paper on to the plate 75 placed underneath the machine and in its
further course strikes against the underside of the lever 76 whereupon this is
pressed upwards and by its upper side pushes back the slide 25 into its right
position.
Thereby the roller 32 as soon as in the course of its revolution it again comes
upwards is pressed down and so pushes the claw 30 of the lever 31 out of the reach
of the tooth 28 so that when the gripper comes back into its original position it is
brought to a stand-still and it falls into the opening forined by the before described
depression of the lever 18.
Under the sifting box 1 a regulating slide 77 is arranged and provided with a
handle 78.
If it is desired to cover a strip of paper with less bronze (so that the bronze
should only have a flat appearance on the paper) the slide 77 is drawn more or less
forward according to the finish required so that upon the strip of paper going under
it less bronze powder falls than on the surrounding parts. It is thus entirely under
control to lay a weaker covering upon some parts of the paper without the bronze
powder being thereby uselessly wasted.
The whole of the upper part of the machine may advantageously be surrounded
and enclosed by a protecting box or enclosure not shown in the drawing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A bronzing machine having a gripper which automatically seizes the paper
laid into it carries it under a sifting box having a jolting vertical movement
imparted thereto to deliver any desired quantity of bronze on to such paper such
gripper being automatically returned back to its original position after delivering
the finished bronzed paper substantially as and for the purposes set forth.
2. In combination with the apparatus claimed above-the withdrawable slides
which render possible the stronger or the weaker bronzing of the strips of paper
substantially as and for the purposes set forth.
3. In combination with the apparatus claimed in Claim 1-the arrangement of
brushes which take off the bronze from the polishing and rubbing rollers and throw
it into a catching box in conjunction with the brushes underneath the machine which 5
serve for the cleaning of the bearers or under supports arranged and mounted

page_text: capable of revolving for the purpose of the passage of the gripper and turned
by the latter substantially in the manner and for the purposes hereinbefore set
forth.
4. The arrangement of the adjustable apparatus corresponding with a single sheet
of paper
which immediately after the passage of the last end of the sheet of paper
under it puts the sifting box out of action in combination and acting in con-
junction with a gripper such as hereinbefore described and as and for the purposes
set forth.
5. The arrangement construction and combination of parts of a bronzing machine
substantially in the manner and for the purposes hereinbefore described and
illustrated in the drawings hereunto annexed.
Dated thio 14th dow of November 1900
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.