Improvements in Bronzing Machines.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Bronzing Machines.
I CHRISTIAN LANDOLT, of Louisville, in the County of Jefferson and State of
Kentucky, United States of America, gentleman, 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 :-
My invention relates to an improvement in Bronzing Machines and the objects of
my invention are to apply the bronze from beneath to the printed paper and dust the
surplus bronze away from the same and also to regulate the amount of pressure of
the belt upon the work by making the upper frame adjustable in relation to the
lower one.
In the drawings :
Figure 1 is a vertical longitudinal section of a machine embodying my improve-
ments.
Figure 2 is a plan view of the feed roller and the fountain in which it is
placed.
Figure 3 is a detached view showing the mechanism for reciprocating the rubbing
rollers.
Figure 4 is a detailed view illustrating the manner of mounting the feed and
bronzing rollers and the means for adjusting said feed roller.
Referring to the above drawings A represents the lower portion of the frame and B
the upper portion thereof: Passing through the ends of the frame B are the set
screws and in the 'top edge of the frame A are placed the set screws D, which pass
through the slotted ends in the frame B by means of which the latter is secured to the
frame A and the amount of pressure applied to the printed work as it passes through
the machine to be.bronzed, cleaned and polished, is regulated.
The printed work is delivered face downward directly from the printing machine
upon the endless apron E, which is located at the front end of the frame A and which
carries the work forward to the endless belt F which passes around two rollers G
journalled in the upper frame B. The belt F moves the work forward and carries it
through the machine. For maintaining the belt at a uniform tension any of the
ordinary tension devices such. as are commonly used for this purpose may be
employed.
As the printed work leaves the apron E it passes between the belt F and the
removable bronzing roller H (which is covered with plush) placed above the removable
feed roller Z, the lower edge of which revolves in the bronze fountain L.
This roller Z is covered with plush and may either be made in one continuous roll
or be divided into a number of sections G which are interchangeable on their shaft,
and which will then revolve in separate pockets or chambers in the fountain L. When
this roller is made into different sections G₁ and the fountain is divided by partitions
into separate compartments, different colors of bronze may be applied to the printed
work at the same time and the width of each color of bronze can be controlled at will.
As the sections G¹ are interchangeable on their shaft, the width or particular place at
which each color shall be applied can he regulated at will.
One end of the rollers H, Z, is mounted in a bearing 2 (Fig. 4) adjustable vertically
in any suitable manner on the side of the frame A. The roller Z may be brought into
contact with the roller H or carried out of contact therewith by means of an eccentric
lever 4 fixed at one end to a movable journal box 3, mounted in the bearing 2. The
object of disconnecting the feed roller Z from roller H is to prevent the feeding of
bronze when the bronzed work is passed through the machine a second time if

page_text: Instead of the above arrangement for adjusting the roller Z any other arrangement
which will effect this result may be adopted.
Resting against and revolving with the roller H is the plush covered regulating
roller 5 having a scraper O bearing against its surface. This roller 5 is mounted in
the lower ends of swinging bearings the other ends of which are mounted upon the
journals of the front roller G.
The function of the roller 5 is to remove a superabundance of bronze from the
roller H when very light printed matter requiring but little bronze is passing
through the machine. When heavy printed matter requiring much bronze is
passing through the machine then the roller 5 is not needed and is detached from its
bearings.
The printed sheets in passing the roller H are pressed against the endless belt F
which in connection with the plush covered rubbing rollers J J and cleaning and
polishing rollers M carry the sheets along until they pass out of the rear of the
machine.
:
• I.
The bronze roller H, rubbing rollers J J and clearing rollers M are placed in
proximity to each other and all of them being made to revolve in the same
direction there is no possibility of the sheet falling down in between them since each
roller carries the end of each advancing sheet forward until it is caught by the next
roller. These rollers M press the sheet upward against the endless belt F which
moves slower than the rubbing and cleaning rollers and hence the latter have ample
time to clean each sheet.
4
•
The plush covered rollers J J and M are provided with scrapers O placed in
swinging bearings fixed to the journals of the rollers. Said scrapers are made
adjustable in their bearings in any suitable manner and are adjusted to bear against
the surface of the plush for the purpose of removing or dusting the bronze therefrom
and keeping the rollers clear and free from bronze.
The rubbing rollers (of which I have shown two) are placed just beyond the bronze
roller H which when only a single color is to be used are given an endwise reciprocating
motion so as to rub in the bronze and cause it to adhere to the work. In order to
impart this reciprocating motion to the rollers J J a pulley K having a diagonal
groove in its surface, is secured to one end of the shaft of each roller and in the groove
of each pulley engages one end of a stationary arm L' on the side of the frame A.
As each pulley K is rigidly secured to its shaft, when the latter revolves it is caused
to have an endwise reciprocating motion.
In case a number of colors of bronze are to be used, then either the pulleys or the
arms L' will be removed so as to prevent an end wise motion of the rollers which would
cause a mixing together of the colors.
1
The rollers J, M, are separated from each other by vertical partitions N, which
prevent, the bronze froin being thrown from one roller to another and thus keep them
separate from each other.
1
Upon the end of each of the rollers M on the outside of the frame is placed a cog
wheel (shown by dotted circles, fig. 1) with which engage the idlers Q which are
driven by a cog wheel R carrying a pulley. Passing around the pulley secured to the
cog wheel R is the belt Q which drives the front roller G around which said belt
passes. The rollers J receive their motion from the crossed belts A¹ passing over
pulleys on the shaft of the rear roller G. The shaft carrying the feed roller or its
Sections G¹ receives its motion from a crossed belt driven by a pulley fixed to the
cog wheel R. The belt K' which operates the front roll W and delivery belt E is
driven by the shaft of the roller H which receives its motion through the pressure and
motion of rollers Z and G. Instead of the cog wheels described, belts and pulleys
may be used.
32
The printed and bronzed work as it passes from the machine cleaned and polished
falls face downward upon any suitable device placed to receive it. All the surplus
bronze which has been cleaned from the bronzed matter drops into a drawer in the
bottom of frame A. and can be again used.
****

page_text: Heretofore a stationary stencil has been used, but to do away with the disadvantages
of such a device I here use an endless stencil U which is provided with openings
through its surface, of any desired shape length or size and which serves to control
to what parts of the printed work the bronze shall be applied. While the stencil is
used the rollers J are not permitted to have an end wise motion.
For the purpose of keeping the belt F down upon the work as it passes through the
machine a board or boards X are placed in the frame B and which have their lower
edges bearing directly upon the belt so that it cannot spring upward.
When it is desired to bronze only a part of a printed sheet the endless stencil is
used in which openings are cut corresponding in size to the letters, lines or design to
be bronzed upon the printed sheet. The sheet is laid on the stencil in such a manner
that the parts selected to be bronzed lie over the openings in the stencil and through
which openings the bronze is applied by the roller H which is fed by the roller Z or
its sections GT.
This stencil U passes around the four rollers W located in the corners of the frame-A
over the top of the roller H, the rubbing rollers J and the polishing and cleaning
rollers M and the printed matter is moved along and carried between the belt
and the stencil.
Both the stencil and belt F move in the same direction and at the same rate of
speed, while the rollers J and M. are made to revolve more rapidly so as to enable
them to clear away the surplus bronze and to polish and give the work a finished
appearance.
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. In a bronzing machine, the combination with a feed roller adapted to supply the
bronze, of a bronzing roller revolving in contact therewith and adapted to carry the
bronze to the printed work and suitable means for effecting the engagement and
disengagement of said rollers, for the purpose specified.
2. In a bronzing machine, the combination with a feed roller adapted to supply the
bronze, and a bronzing roller revolving in contact therewith, of a removable regu-
lating roller revolving in contact with said bronzing roller for removing a super-
abundance of bronze from the latter, and a scraper for removing the bronze from the
regulating roller.
3. In a bronzing machine, an endless stencil provided with suitable perforations, in
combination with an endless belt for carrying the printed matter through the machine
and mechanism for operating the stencil and belt, as described.
4. In a bronzing machine the combination with the endless stencil provided with
suitable perforations, of the feed roller for the bronze, the bronzing roller revolving
in contact with the feed roller, the endless belt F, the rollers for brushing and cleaning
the bronze through the openings in the stencil and suitable operating mechanism for
the belt, stencil and rollers.
5. In a bronzing machine, the combination of the upper frame, the rollers placed
therein, the endless belt passing around said rollers, and the boards placed inside of
the frame for pressing the belt down upon the rubbing and cleaning rollers as
described.
L
1000
BERNHARD DUKES,
226, High Holborn, London, W.C., Agent for the Applicant.