Improvements in Bronzing Machines.
Year: 1890

page_text: Date of Application, 2nd Apr., 1890
Complete Specification Left, 2nd Jan., 1891-Accepted, 14th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in Bronzing Machines.
I, FREDERIC MADELEY MOLE of 36, Cannon Street, Birmingham, in the
County of Warwick, Printer, do hereby declare the nature of this invention to be
as follows:-
My invention has for its object to construct a special bronzing machine having
the improvements arranged therein similarly to those set forth in Letters Patent
No. 5443 of 1888 granted to me for improvements in printing machines.
In the Patent Specification above referred to I have described a method of
attaching certain improvements to printing machines whereby the ordinary printing
machine can be readily converted into a bronzing machine, whereas in this, my
present invention I do not desire to attach them to any existing machine, but to
construct a machine for bronzing purposes alone, so that in large establishments, or
in printing offices where much bronzing is to be performed one special machine can
be employed instead of occupying an ordinary printing machine as in my previous
invention before referred to, and I also thereby save the power which is uselessly
consumed in driving parts of a printing machine not actually required for the specific
work then being performed by it, together with saving the loss of time in attaching
and detaching the bronzing parts to and from such printing machines hereinbefore
referred to.
In carrying my invention into effect I construct a bronzing machine with a
frame having fast and loose pulleys to give motion in the usual way to a segmental
rack for giving motion to the cylinder, to drive some small dusting and cleaning
rollers arranged upon the machine, and also to apply a brake to gradually arrest
the motion of the revolving cylinder.
I mount upon the upper portion of the machine, a circular drum or cylinder which
is driven by the segmental rack hereinbefore referred to, upon which cylinder the
sheets to receive the bronzing powder are fed; and which are carried round upon
the cylinder by means of a gripper or grippers laying hold of the sheet where it is
guided on to the correct position for working. The cylinder I drive in one direction
by means of the usual well known toothed segment rack and reversing arrangement
of gearing, common to cylinder printing machines.
will pass
Beneath the cylinder I place a loose blanket, band, or casing, which partly
surrounds the cylinder, and which is so arranged that the sheet of paper
between the blanket and the surface of the cylinder. This blanket or band I con-
struct out of flannel or any other suitable yielding material, such as velvet, cloth,
or lined canvass. Within a recessed portion of the cylinder I attach a feeding
trough, tube, or casing, for containing the bronze powder; and I arrange that the
powder from this 'tube or casing shall be distributed as the cylinder revolves, so
that the bronze is evenly conveyed to the yielding band or blanket beneath and
placed partly around the cylinder.
The tube or casing I perforate or form with suitable opening or openings for
allowing the powder to freely fall from the tube on to the blanket when the same
is being passed only:
The sheets requiring to be bronzed are printed in any ordinary manner with the
usual preparation for ensuring that the powder may be caused to adhere; and the
sheets so printed are fed upon the cylinder with the print side down towards
the blanket or casing; so that, as the cylinder revolves, the powder is transferred to,
or taken up by, the sheet from the blanket. After the paper has passed the
blanket, I cause it to come into contact with revolving dusting brushes or rollers
which remove all the superfluous powder from the sheet, so that the operation.

page_text: of bronzing is completed in one process, and during one revolution of the machine
cylinder.
Dated this 1st d
Ր
1 1000
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Bronzing Machines.
I, FREDERIC MADELEY MOLE, of 36 Cannon Street, Birmingham, in the
County of Warwick, 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 :-
My invention has for its object to construct a special bronzing machine having
the improvements arranged therein similarly to those set forth in Letters Patent
No. 5443 of 1888 granted to me for improvements in printing machines.
In the Patent Specification above referred to I have described a method of
attaching certain improvements to printing machines whereby the ordinary printing
machine can be readily converted into a bronzing machine, whereas in this my
present invention I do not desire to attach them to any existing machine, but
to construct a machine for bronzing purposes alone so that in large establish-
ments or in printing. offices where much bronzing is to be performed one special
machine can be employed instead of occupying an ordinary printing machine as
in my previous invention before referred to and I also thereby save the power which
is uselessly consumed in driving parts of a printing machine not actually required
for the specific work then being performed by it together with saving the loss of
time in attaching and detaching the bronzing parts to and from such printing
machines herein before referred to.
.
In carrying my invention into effect I construct a bronzing machine with a frame
having fast and loose pulleys to give motion in the usual way to a segmental rack
for giving motion to the cylinder, to drive some small dusting and cleaning rollers
arranged upon the machine, and also to apply a brake to gradually arrest the
motion of the revolving cylinder. I mount upon the upper portion of the machine
a circular drum or cylinder which is driven by the segmental, rack herein before
referred to, upon which cylinder the sheets to receive the bronzing powder are fed,
and which are carried round upon the cylinder by means of a gripper or grippers
laying hold of the sheet where it is guided on to the correct position for working.
The cylinders I drive in one direction by means of the usual well known toothed
segment rack and reversing arrangement of gearing, common to cylinder printing
machines. Beneath the cylinder I place a loose blanket, band, or casing, which
partly surrounds the cylinder, and which is so arranged that the sheet of paper will
pass between the blanket and the surface of the cylinder. This blanket or band I
construct out of flannel or any other suitable yielding material, such as velvet,
cloth, or lined canvas. Within a recessed portion of the cylinder I attach a
feeding trough, tube or casing, for containing the bronze powder; and I arrange
that the powder from this tube or casing shall be distributed as the cylinder
revolves, so that the bronze is evenly conveyed to the yielding band or blanket
beneath and placed partly around the cylinder.
The tube or casing I perforate or form with suitable opening or openings for
allowing the powder to freely fall from the tube on to the blanket, when the same
is being passed only.
The sheets requiring to be bronzed are printed in any ordinary manner with the
usual preparation for ensuring that the powder may be caused to adhere; and the
sheets so printed are fed upon the cylinder with the print side down towards the
blanket or casing, so that, as the cylinder revolves, the powder is transferred to or
taken up by, the sheet from the blanket. After the paper has passed the blanket
I cause it to come into contact with revolving dusting brushes or rollers, which

page_text: remove an the supernuous powder from the sheet, so that the operation of bronzing
is completed in one process, and during one revolution of the machine cylinder.
In the accompanying drawings
Figure 1 is a side elevation of my improved bronzing machine with the ordinary
and usual driving and controlling mechanism common to printing machines,
indicated in outline only. but with my bronzing blanket, distributing tube and
improved dusting arrangements shown more clearly.
Figure 2 is a plan of my machine.
Figure 3 is a detailed sectional elevation of the drum or cylinder with the
dusting and cleaning rollers and brushes more particularly set forth.
Figure 4 is a detailed elevation of the driving arrangement of the dusting and
cleaning rollers.
A is the revolving cylinder or drum for receiving the sheet of paper that is to be
bronzed; B is the frame of the machine; C, C¹, are the fast and loose pulleys for
driving the machine and giving motion by the gearing D, D', and connecting rod E
to the segment wheel F in the usual and ordinary manner common to printing
machines. C is the pulley for conveying motion by the belt or cord H to the
dusting and cleaning rollers h1, h2, h3, h. K is the tube or trough for distributing
the bronze powder, this tube being formed with an outer casing, and having holes
about its circumference, arranged so that the powder may gravitate from the tube.
perforations on to the outer casing and then to be distributed on to the blanket.
L is the blanket carried at one end upon the frame bracket M and at the other
upon the adjusting screw N. The spring O upon the adjusting screw keeping the
tension of the blanket of uniform degree sufficient for properly embracing the lower
portion of the drum A.
The dusting and cleaning rollers I cover with a guard P having an inner
diaphragm or baffle plate P¹; the baffle plate being placed to receive any of
the superfluous bronze powder escaping from the first dusting roller ¹. The
covering of the first dusting roller h¹ I prefer to form out of velvet or plush
material and the cleaning roller h' I allow to run in contact with the rollers **
for the purpose of thoroughly removing all the powder from the surface of the
same. The roller h I cover with hair or other fibrous material to form as it were
a brushing roller.
The driving band or cord H I keep tight by means of the adjustable sliding
pulley carried upon the bracket which bracket serves mainly to support
the table S carrying the papers which have been bronzed. T is the laying-on
table or board upon which the wet or marked papers to be bronzed are placed
with their marked surface downwards. When the cylinder A has passed round in
the direction of arrow sufficiently to bring the bronzing tube K down to the blanket,
a certain amount of bronzing powder has fallen through the perforated tube on to
its outer casing and is delivered on to the blanket L through the opening kl. As
the cylinder revolves the grippers U take hold of the sheet on the laying on board T
and carry it round immediately after the blanket has been coated with the bronzing
material thereby causing the paper to be evenly coated over the surfaces previously
moistened or prepared for its reception. The escape of the superfluous bronze
powder is very effectually prevented by the system of rollers and brushes I have
hereinbefore described.
The exact configuration of the machine framework and laying on and taking off
boards may be varied, and the precise arrangement of the dusting and cleaning
rollers may not always be followed but may be adapted to suit any particular or
peculiar size of machine or form of work to be done upon the machine without in
any way departing from the essential features of my present invention.
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 construction of a bronzing machine having a cylinder such as A containing

page_text: a bronzing tube such as K enveloped or partly embraced by a blanket such as L
substantially as herein described and as set forth.
2. The construction of a bronzing machine combined with the dusting and
cleaning rollers such as ', h³, 1, 1, having my improved distributing tube and
revolving cylinder substantially as herein described and as set forth in the accom-
panying drawings.
3. Improvements in bronzing machines having the feeding apparatus arranged
in the form of a perforated tube and outer casing for the purposes hereinbefore
described and as set forth in the accompanying drawings.
1001
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.