Improvements in Bronzing and Dusting Machines.
Year: 1891

page_text: Date of Application, 9th Oct., 1891
Complete Specification Left, 9th Aug., 1892-Accepted, 10th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Bronzing and Dusting Machines.
I, FREDERIC MADELY MOLE, of 36 Cannon Street, in the City of Birmingham,
Printer, do hereby declare the nature of this invention to be as follows:-
This invention relates to the manner in which I construct and arrange bronzing
and dusting machines for use in printing establishments and for like purposes,
whereby I am enabled to produce a more uniform surface upon the paper or
material being bronzed, and in a more expeditions and cleanly manner than is at
present possible with the existing bronzing and dusting machines at present in use.
In carrying my invention into effect I construct a bronzing and dusting machine
having a cylindrical drum or main cylinder, on to the circumference of which the
paper to be bronzed is fed and while upon its surface is coated with the bronze
powder; and the sheet is then conveyed from the cylinder towards another part of
my machine where the papers are dusted on the back and front while being conveyed
towards the point at which they are deposited..
Within the side frames of my machine, which I construct of cast iron or other
suitable material, I mount a main spindle in any ordinary bearings formed within
the frames, and to this spindle I secure a cylinder which I cause to revolve by
means of gearing driven from a first motion shaft and belt pulleys which I arrange
also upon the frame of my machine. Within the circumference of the cylinder
I form a longitudinal groove or gripper box chamber; and at each end of the
cylinder I mount a chain wheel, having a pitch chain band working thereon;
the pitch chains I cause to pass round separate pitch chain wheels secured to a
common shaft running in bearings upon the end of the side frames of my machine.
To these two pitch chains which travel at the same speed and in parallel paths, I
secure one or more gripper boxes of a peculiar shape formed to exactly fit within
the longitudinal chamber groove of the cylinder; thus as the cylinder revolves
and with it the pitch chain wheels, the two chains bring the gripper boxes in turn
into the cylinder chamber at one position of the revolution of the cylinder, and at
the lower or reverse position remove them. Upon the ends of the gripper boxes
I mount small rollers or pulleys to run upon guides or rails placed upon the side
frames of my machine, to keep the boxes in correct position for entering the
chamber upon the cylinder. I proportion the driving gearing and the length of
chains with the position and number of boxes to suit the gap chamber or chambers
which I form within the cylinder, so that as the cylinder revolves the gap chamber
or chambers shall have presented to it in its correct position the gripper box or
boxes from the travelling chains.
Within the travelling box or boxes I arrange a gripper or finger plate or plates
for gripping the paper and for carrying it round upon the cylinder. The gripper
plate or plates I carry upon a shaft running the entire length of the box and
projecting through both ends; on each side thus projecting I attach a finger or
operating lever by which with suitably placed adjustable stops, the gripper plate
can be caused to revolve right backwards so as to present an open jaw to engage
with and receive the projecting edge of the paper on the laying on table. Thus
when the box travelling along its guides or pathway approaches the cylinder, the
jaw is opened by a stop, and it is kept open until it has seated itself in the chamber
within the cylinder; and then being immediately under the projecting edge of the
paper, the jaw is released and is caused to fly back and secure the paper ready for
carrying round to meet the bronzing and dusting appliances which I provide upon
my machine.
After passing the bronzing and dusting appliances, the paper still within the

page_text: •
gripper is led away from the cylinder and is conveyed along the lower portion of
the chain path towards the opposite end of the machine, being carried between two
dusting rollers or brushes which are driven in an opposite direction to the motion
of the paper, for the purpose of thoroughly removing the superfluous bronze dust
standing upon the front or back surface of the paper.
After passing between the surface dusting rollers or cleaners I cause the chains
to bring the gripper box against suitably placed adjustable opening finger stops,
which partly open the jaw to a sufficient extent to permit the paper to fall on to
the taking off table placed below the chain path to receive and collect the finished
papers.
The bronzing portion of my machine I arrange on the opposite side of the
cylinder to that occupied by the chain guides and tables; and the dusting and
cleaning gearing with their rollers, brushes and cleaners I place on the underside
of the cylinder preferably in a self contained case or box, except the two dusters
between which the sheet passes after leaving the cylinder.
I mount a hopper or trough for containing the bronze powder upon spindles or
rollers which I cause to rest upon the upper portion of the frames of the machine
in such a manner as to permit of a backward and forward stroke being given to
the hopper to cause regular distribution and prevent clogging within the box.
This travelling motion I obtain preferably by means of a cam or cams which I
mount beneath the hopper, and which I drive by means of chain, belting, cords or
other ordinary gearing from the first motion or other shaft. The irregular
or curved path which I cut within the cam gives motion to a connecting rod or
lever partly embracing the cam, and having a fulcrum placed above it to cause a
more or less long stroke to be communicated to the hopper by means of the
adjustable fulcrum attachment. The powder from the hopper I discharge through
a series of apertures in a perforated zinc or other metal plate immediately in front
of the same through which the powder is sifted; the extent of the opening or
width of trough surface open to discharge the powder I regulate by a series of
adjustable sliding shutter doors or plates, having springs, screws, eccentric catches
or other stops to keep them in any desired position during the movement of the
hopper. I attach a hinged or sliding cover or lid to the top of the hopper for
convenience of filling and for examination.
I cause the powder to fall on to a guide plate or shelf placed immediately
beneath the hopper, in such a position that the bronze shall be at once communicated
to the vibrating pad which I arrange to receive the powder and then to transmit it
to the paper upon the cylinder.
I construct the pad in the form of a segment of a circle to suit the diameter
of the cylinder, and I carry it within the frames of the machine by pins working
within bearings permitting a sliding motion to be made. The surface of the
pad in actual contact with the cylinder 1 form of flannel resting upon sheeps wool
or other suitable material which I suspend in position by means of a clamping bar
or frame and nuts and bolts, to the top or upper end of the pad frame. At the
side portions of the pad I prefer to employ flannel or other close material, flanges
or rubbers, to prevent the escape of powder from the ends of the cylinder when
passing the pad.
Beneath the bronzing pad I arrange a box or separate casing having a number
of dusting rollers or brushes carried within, each of which I cause to revolve by
means preferably of chain wheels mounted upon the ends of the spindles, and
driven by means of a pitch chain from the motion shafts of my machine; suitable
tightening pulleys being employed to keep the chain in its true and best position
upon the various wheels. The box with its contained rollers I carry in a line
radial to the cylinder shaft, upon stretcher bars or stays passing preferably across
the machine from one side frame to the other; these bars having means of adjust-
ment provided to permit of wear and tear being taken up and other adjustment
without disturbing the rollers. And in order to permit of ready examination or
cleansing of the rollers and the gearing I form one of the stretcher bar supports

page_text: as a cam or half circular beam which while supporting the portion of the box eye
bearings which partly embrace it when in position yet will permit of the box being
swung round or removed when turned round to its opposite position. This system
of, removal does not interfere with the adjustment of the rollers, and is of much
value in saving time and facilitating examination and cleaning. Beneath the
rollers arrange a sliding drawer into which the powder from the rollers and
dusters is discharged; and in front or at the side of the box or case I place a tray
or door for giving ready access to the rollers. The whole box or case I cause
to slide within or upon guides provided upon the side frames of my machine to
facilitate the removal of rollers or for any other purpose.
The surface of the cylinder I clean or dust each revolution after the paper has
been removed from it, by means of a circular revolving roller or brush which I
mount between the side frames of the machine, and set in motion by pitch chain,
band or other ordinary gearing arrangement driven from the first motion or other
shaft.
The laying on or feeding table I construct of any suitable material and I provide
a parallel side lay or stop bracket having an adjustable system of levers and
clamping screws for use with varying widths of papers that may be employed, and
having also a back gauge or stop for determining the position of the paper to give
the necessary overlap with varying lengths of sheets employed. I prefer to hinge
the table for convenience in examination of the gearing and the collecting table
beneath it.
I collect the papers in a taking off table arranged between the frames of my
machine, and provided with side guides and adjustable tie bolts to allow of varying
width and lengths of paper being collected and retained after they have passed
between the end or final cleaning or other auxiliary or dusting rollers which
remove all bronze powder that may have collected on the back and front of the
plates.
a
For convenience of bringing my improved bronzing machine into any position
in a workshop or printing establishment I sometimes mount it on wheels and axles
having eccentric bearings, so that when a lever upon the axle is turned, the wheels
or rollers which revolve loosely on the axles, are caused to touch the floor line and
the weight of the machine to be carried upon them instead of upon the floor direct
from the side frames.
I sometimes arrange my cylinder with fixed grippers, and provide flyers for
leading off the paper after being bronzed and dusted, through a pair of auxiliary
or final dusters for the purpose of cleaning both sides of the sheet before being
deposited at any position.
I do not limit the application of my invention to any particular form of frame-
work that may be employed to carry my improved arrangement of cylinder,
dusting rollers travelling grippers and other details herein before described, but
arrange any form of framework and of any material to work with my improved
combination of appliances as herein described when applied to a specially con-
structed iron frame.
Dated this 8th day of October 1891.
COMPLETE SPECIFICATION.
Improvements in Bronzing and Dusting Machines.
50 I, FREDERIC MADELY MOLE, of 36 Cannon Street, in the City of Birmingham,
Printer, 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 the manner in which I construct and arrange bronzing

page_text: and dusting machines for use in printing establishments and for like purposes,
whereby I am enabled to produce a more uniform surface upon the paper or
material being bronzed, and in a more expeditious and cleanly manner than is at
present possible with the existing bronzing and dusting machines at present in use.
In the accompanying seven sheets of explanatory drawings,
Figure 1 is a side elevation of my improved bronzing and dusting machine
showing the various parts in their respective positions.
Figure 14 is a part view showing the eccentric axle.
Figure 2 is a plan of the machine complete and Figure 3 an end elevation of
the same.
Figure 4 is a part elevation and Figure 5 a section of the cylinder showing the
gripper box chamber and the driving chain wheels and gear.
Figure 6 is an elevation of the gripper box, and Figure 7 an end view of the
same showing the operating lever for opening the gripper plate.
Figure 8 is a plan showing the rollers and Figure 9 a section of the same.
Figure 10 is an elevation of the bronzing pad showing the clamping bar with
bolts and nuts, and Figure 11 is a side view of the same.
Figure 12 is a section of the hopper showing perforated plate with shutters in
position and also hinged cover, and Figure 13 is a part side view of the same
showing pins or bearers running on rollers.
Figure 14 is an elevation of the cam for giving a vibratory motion to the hopper
and the pad.
Figure 15 is a front elevation of the guide plate for bronze and Figure 16 is a
section of the same.
Figure 17 is an end elevation of the duster box showing revolving dusters
and drawer for collecting bronze powder and Figure 18 is a part section of the
same.
Figure 19 is a plan of the outside or final dusters.
Figure 20 an end elevation and Figure 21 a part side view of same.
Figure 22 is a front view of the cylinder duster in box, and Figure 23 is a section
of the same.
In carrying my invention into effect I construct a bronzing and dusting machine
as shown in Figures 1, 2 and 3 having a cylindrical drum or main cylinder A. on to
the circumference of which the paper to be bronzed is fed, and while upon its
surface is coated with the bronze powder, and the sheet is then conveyed from
the cylinder towards another part of my machine where the papers are dusted on
the back and front while being conveyed towards the point at which they are
deposited.
Within the side frames B of my machine which I construct of cast iron or other
suitable material, I mount a main spindle in any ordinary bearings formed within
the frames and to this spindle I secure a cylinder A which I cause to revolve by
means of gearing a¹, a³ driven from a first motion shaft C and belt pulleys C' which
I arrange also upon the frame of my machine. Within the circumference of the
cylinder Figures 4 and 5 I form a longitudinal groove or gripper box chamber A',
and at each end of the cylinder I mount a chain wheel C₁, C, having a pitch chain
band C³ (see Figure 1) working thereon; the pitch chains I cause to pass round
separate pitch chain wheels C (see Figure 2) secured to a common shaft C
running in bearings upon the end of the side frames of my machine. To these two
pitch chains which travel at the same speed and in parallel paths, I secure one or
more gripper boxes G Figure 5 of a peculiar shape formed to exactly fit within the
longitudinal chamber groove A¹ of the cylinder; thus as the cylinder revolves and
with it the pitch chain wheels C', C², the two chains bring the gripper boxes (+ in
turn into the cylinder chamber at one position of the revolution of the cylinder and
at the lower or reverse position remove them. Upon the ends of the gripper boxes
I mount small rollers or pulleys D to ran upon guides or rails E Figure 1 placed
upon the side frames of my machine to keep the boxes in correct position for
entering the chamber upon the cylinder. I proportion the driving gearing and the

page_text: length of chains with the position and number of boxes to suit the gap chamber or
chambers which I form within the cylinder, so that as the cylinder revolves the gap
chamber or chambers shall have presented to it in its correct position the gripper
box or boxes from the travelling chains.
Within the travelling box or boxes I arrange a gripper or finger plate_or
plates G³ for gripping the paper and for carrying it round upon the cylinder. The
gripper plate or plates I carry upon a shaft G* running the entire length of the box
and projecting through both ends; on each side thus projecting I attach a finger or
operating lever G by which with suitably placed adjustable stops G Figure 1 the
gripper plate can be caused to revolve right backwards so as to present an open jaw
to engage with and receive the projecting edge of the paper on the laying on
table J. Thus when the box travelling along its guides or pathways approaches
the cylinder, the jaw is opened by a stop, and it is kept open until it has seated
itself, in the chamber within the cylinder; and then being immediately under the
projecting edge of the paper, the jaw is released and is caused to fly back and
secure the paper ready for carrying round to meet the bronzing and dusting
appliances which I provide upon my machine.
After passing the bronzing and dusting appliances, the paper still within the
gripper is led away from the cylinder and is conveyed along the lower portion of
the chain path towards the opposite end of the machine, being carried between two
dusting rollers or brushes F¹, F. Figure 1 and Figure 20, which are driven in an
opposite direction to the motion of the paper, for the purpose of thoroughly
removing the superfluous bronze dust standing upon the front or back surface of
the paper. These rollers or dusters are also used to dust the back and front of the
gripper box, the upper one being carried in revolving arms F' enabling it to rise
and fall so as to accommodate itself to the varying shape of the gripper box. To
allow of this motion the upper roller is driven through the medium of the idle
wheel F and the wheels F and F and its motion is regulated by the springs F'.
After passing between the surface dusting rollers or cleaners I cause the chains to
bring the gripper box against suitably placed adjustable opening finger stops G'
Figure 1, which partly open the jaw to a sufficient extent to permit the paper to
fall on to the taking off table W placed below the chain path to receive and collect
the finished papers.
The bronzing portion of my machine I arrange on the opposite side of the
cylinder to that occupied by the chain guides and tables; and the dusting and
cleaning gearing with their rollers, brushes and cleaners I place on the underside
of the cylinder preferably in a self contained case or box, except the two
dusters F, F Figure 1 between which the sheet passes after leaving the cylinder.
I mount a hopper H Figures 1 and 3 or trough for containing the bronze powder
upon spindles or rollers H, H' which I cause to rest upon the upper portion of the
frames of the machine in such a manner as to permit of a backward and forward
stroke being given to the hopper to cause regular distribution and prevent clogging
within the box. This travelling motion I obtain preferably by means of a cam
or cams K which I mount beneath the hopper, and which I drive by means of
chain, belting, cords, or other ordinary gearing from the first motion or other
shaft.
The irregular or curved path which I cut within the cam gives motion to a
connecting rod or lever K', partly embracing the cam, and having a fulcrum K'
placed above it to cause a more or less long stroke to be communicated to the
hopper by means of the adjustable fulcrum attachment K. The powder from the
hopper I discharge through a series of apertures in a perforated zinc or other
plate H, Figures 12 and 13, immediately in front of the same through which the
powder is sifted; the extent of the opening or width of trough surface open to
discharge the powder I regulate by a series of adjustable sliding shutter doors or
plates having springs, screws, eccentric catches or other stops to keep them in
any desired position during the movement of the hopper. I attach a hinged or

page_text: sliding cover or lid H to the top of the hopper for convenience of filling and for
examination.
I cause the powder to fall on to a guide plate or shaft L Figures 15 and 16
placed immediately beneath the hopper, in such a position that the bronze shall be
at once communicated to the vibrating pad P, which I arrange to receive the
powder and then to transmit it to the paper upon the cylinder.
I construct the pad P in the form of a segment of a circle to suit the diameter
of the cylinder and I carry it within the frames of the machine by pins P', working
within bearings permitting a sliding motion to be made. The surface of the pad in
actual contact with the cylinder I form of flannel resting upon sheep's wool or
other suitable material which I suspend in position by means of a clamping bar or
frame P and nuts and bolts to the top or upper end of the pad frame. At the
side portions of the pad I prefer to employ flannel or other close material, flanges
or rubbers P³ to prevent the escape of powder from the ends of the cylinder when
passing the pad.
Beneath the bronzing pad 1 arrange a box or separate casing M having a
number of dusting rollers or brushes R carried within, each of which I cause
to revolve by means preferably of chain wheels N Figures 1 and 18 mounted
upon the ends of the spindles and driven by means of a pitch chain N' Figure 1
from the motion shafts of my machine; suitable tightening pulleys N' being
employed to keep the chain in its true and best position upon the various wheels.
further carry cleaning spindles or rollers which I set in contact with the dusting
rollers R for the purpose of separating from the dusting rollers the bronze powder
adhering to them. These cleaning rollers I leave free to turn in their centres or
bearings in the box or casing. The box M with its contained rollers I carry in a
line radial to the cylinder shaft upon stretcher bars or stays S', S' Figure 1, passing
preferably across the machine from one side frame to the other see Figure 3; these
bars having means of adjustment provided to permit of wear and tear being taken
up and other adjustment without disturbing the rollers. And in order to permit of
ready examination or cleaning of the rollers and the gearing I form one of the
stretcher bar supports S Figure 17 as a cam or half circular beam which while
supporting the portion of the box eye bearings which partly embrace it when in
position yet will permit of the box being swung round or removed when turned
round to its opposite position. This system of removal does not interfere with the
adjustment of the rollers, and is of much value in saving time and facilitating
examination and cleaning. Beneath the rollers I arrange a sliding drawer M' into
which the powder from the rollers and dusters is discharged; and in front or at the
side of the box or case 1 place a tray M² or door for giving ready access to
the rollers. The whole box or case I cause to slide within or upon guides O
Figures 1 and 3 provided upon the side frames of my machine to facilitate the
removal of rollers or for any other purpose.
The surface of the cylinder I clean or dust at each revolution after the paper
has been removed from it, by means of a circular revolving roller or brush T
Figure 23 which I mount between the side frames of the machine, and set in
motion by pitch chain band or other ordinary gearing arrangement driven from
the first motion or other shaft.
The laying on or feeding table J I construct of any suitable material and I
provide a parallel side lay or stop bracket J¹ having an adjustable system of
levers and clamping screws J' for use with varying widths of papers that may
be employed, and having also a back gauge or stop for determining the position
of the paper to give the necessary overlap with varying lengths of sheets
employed. I prefer to hinge the table for convenience in examination of the
gearing and the collecting table W beneath it. I collect the papers on a taking
off table W Figure 1 arranged between the frames of my machine, and provided
with side guides W2 and adjustable tie bolts to allow of varying width and lengths
of papers being collected and retained after they have passed between the end or

page_text: final cleaning or other auxiliary or dusting rollers which remove all bronze powder
that may have collected on the back and front of the sheets.
For convenience of bringing my improved bronzing machine into any position in
a workshop or printing establishment I sometimes mount it on wheels and axles X
Figure 3 having eccentric bearings X¹ Figure 14, so that when a lever X' upon the
axle is turned, the wheels or rollers X³ which revolve loosely on the axles, are
caused to touch the floor line and the weight of the machine to be carried upon
them instead of upon the floor direct from the side frames.
I sometimes arrange my cylinder with fixed grippers, and provide flyers for
leading off the paper after being bronzed and dusted, through a pair of auxiliary
or final dusters for the purpose of cleaning both sides of the sheet before being
deposited at any position.
I do not limit the application of my invention to any particular form of frame-
work that may be employed to carry my improved arrangement of cylinder, dusting
rollers travelling grippers and other details hereinbefore described, but arrange any
form of framework and of any material to work with my improved combination of
appliances as herein described when applied to a specially constructed frame.
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. The combination and arrangement of a bronzing machine having a cylinder or
drum for the reception of the paper to be bronzed and having a gripper or grippers,
gripper box or boxes, arranged to be moved entirely out of and away from the
cylinder during its revolution substantially as and for the purposes hereinbefore
described and as set forth in the accompanying drawings.
2. The construction of bronzing machines having grippers or gripper boxes
attached to travelling chains, cords or bands, substantially as and for the purposes
hereinbefore described and as illustrated in the accompanying drawings.
3. In a bronzing machine the combination and arrangement of a bronze hopper
or trough carried upon spindles or projecting shafts and having sliding shutters or
doors for regulating the distribution of the bronze while under a vibratory move-
ment communicated to the hopper by the cam or cams, substantially as and for the
purposes herein before described and as illustrated in Figures 1, 2, 3, 12 & 13 of the
accompanying drawings.
4. The construction of gripper boxes capable of fitting into a recess or recesses
within a cylinder or drum of a bronzing machine, substantially as and for the
purposes herein before described and as illustrated in Figures 1, 2, 6, 7, 8 & 9 of the
accompanying drawings.
5. In a bronzing machine, the construction of a cylinder or drum having a gap,
groove or recess, or gaps, grooves and recesses for the reception of a movable
gripper or grippers, substantially as and for the purposes hereinbefore described
and as illustrated in Figures 1, 2, 4 & 5 of the accompanying drawings.
6. In a bronzing machine, the construction and arrangement of dusting roller
boxes or cases having a supporting stretcher bar or bars such as S' capable of
turning out of position of support for the purpose of affording facilities for rapid
removal or examination of the box and rollers or brushes, substantially as herein-
before described and as illustrated in Figures 1, 3 & 17 of the accompanying
drawings.
7. In a bronzing machine, the construction and arrangement of eccentric bearings
or eccentric shafts, for permitting the weight of the machine to be carried upon
rollers or wheels when it is desired to move. the machine from one position to
another, substantially as hereinbefore described and as illustrated in the accom-
panying drawings.
8. In a bronzing machine, the construction and arrangement of a pair or pairs of
auxiliary dusting rollers or brushes for the purpose of cleaning and dusting the
back and front of the sheet held by the travelling gripper during the passage of

page_text: the sheet from the cylinder to the taking off table of the machine, substantially as
hereinbefore described.
Dated this 8th day of August 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicant.