Improvements in the Production of Enamel Letters, Inscriptions, and Designs on Enamelled Plates of Iron or other Metal, and in Machinery to be Employed for that purpose.
Year: 1898

page_text: Date of Application, 2nd Sept., 1898
Complete Specification Left, 23rd May, 1899-Accepted, 15th July, 1899
PROVISIONAL SPECIFICATION.
Improvements in the Production of Enamel Letters, Inscriptions, and
Designs on Enamelled Plates of Iron or other Metal, and in
Machinery to be Employed for that purpose.
I, WILLIAM WALTERS, of The Langleys, Selly Oak, in the County of Worcester,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
My invention has for its object to simplify and reduce the cost of the pro-
duction of enamel letters, inscriptions and designs on enamelled plates of iron er
other metal and has especial reference to the production of letters, inscriptions
and designs on enamelled plates of an elaborate or delicate nature.
I will describe my invention in connection with the production of a design on
an enamelled plate of iron.
In carrying my invention into effect I produce on a lithographic stone in the
ordinary manner the design to be produced on the enamelled plate of iron. The
said lithographic stone with the design upon it is mounted or set on the bed of a
double cylinder tin-plate printing machine having the axis of the upper cylinder
or roller situated in the same vertical plane as the axis of the lower cylinder or
roller the said machine being modified in the manner hereinafter described. The
said stone is treated with lithographic ink in the ordinary manner and by the
operation of the machine the stone is passed under the lower roller whereby
the design on the stone is transferred to the said lower roller. The enamelled
plate on which the design is to be produced is passed face downwards between
the two rollers when by the pressure of the said rollers the design on the lower
roller is transferred to the face of the enamelled plate.
The tin-plate printing machine herein before referred to is modified in the
following manner. In the said machine as ordinarily constructed is a gripper
by which the elastic tin plate is held to the cylindrical surface of the upper
roller during the motion of the rollers and tin plate through the required angle
when a detaching or releasing cam acting on the gripper disengages the plate.
As the enamelled plates I operate upon are flat and inelastic and cannot be
curved to the figure of the roller I fix the liberating cam in such a position that
it acts on the gripper immediately the enamelled plate has been seized between
the two rollers. The gripper being thus thrown out of action the plate is carried
forward under pressure in a horizontal plane and the design on the lower roller is
printed on the flat surface of the enamelled plate without any strain on the
enamelled plate tending to disturb its plain figure.
The printing of the design on the enamelled plate is effected in lithographic
varnish which is afterwards dusted with vitreous enamel powder of the required
colour or colours; or the printing may be effected in enamel colour mixed
with lithographic varnish direct from the roller. Where the design is to be
effected in several colours the process is repeated for each colour. Or different
portions of the design may be dusted with different enamel colours, in which
case only one printing is required.

page_text: The design printed on the enamelled plate is burned or finished in the
ordinary way.
Other minute changes in the machine are necessitated by the altered relation
of the gripper to the cam.
My invention is applicable to enamelled plates of metals other than iron, such
for example as plates of enamelled copper.
Dated this Second day of September 1898.
W. T. WHITEMAN,
Agent for the Applicant.
Improvements in the Production of Enamel Letters, Inscriptions, and
Designs on Enamelled Plates of Iron or other Metal, and in
Machinery to be Employed for that purpose.
I, WILLIAM WALTERS, of The Langleys, Selly Oak, in the County of Worcester,
Manufacturer, do hereby declare the nature of my 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 simplify and reduce the cost of the pro-
duction of enamel letters, inscriptions and designs on enamelled plates of iron or
other metal and has especial reference to the production of letters, inscriptions
and designs on enamelled plates of an elaborate or delicate nature.
I will describe my invention in connection with the production of a design on
an enamelled plate of iron.
In carrying my invention into effect I produce on a lithographic stone in the
ordinary manner the design to be produced on the enamelled plate of iron. The
said lithographic stone with the design upon it is mounted or set on the bed of a
double cylinder tin plate printing machine having the axis of the upper cylinder
or roller situated in the same vertical plane as the axis of the lower cylinder or
roller the said machine being modified in the manner hereinafter described. The
said stone is treated with lithographic ink in the ordinary manner and by the
operation of the machine the stone is passed under the lower roller whereby
the design on the stone is transferred to the said lower roller. The enamelled
plate on which the design is to be produced is passed face downwards between
the two rollers when by the pressure of the said rollers the design on the lower
roller is transferred to the face of the enamelled plate.
The tin-plate printing machine hereinbefore referred to is modified in the
following manner. In the said machine as ordinarily constructed is a gripper
by which the elastic tin plate is held to the cylindrical surface of the upper
roller during the motion of the rollers and tin plate through the required angle,
when a detaching or releasing cam acting on the gripper disengages the plate.
As the enamelled plates I operate upon are flat and inelastic and cannot be
curved to the figure of the roller I fix the liberating cam in such a position that
it acts on the gripper immediately the enamelled plate has been seized between
the two rollers. The gripper being thus thrown out of action the plate is carried
forward under pressure in a horizontal plane and the design on the lower roller is
printed on the flat surface of the enamelled plate without any strain on the
enamelled plate tending to disturb its plain or flat figure.
Figures 1 and 2 of the accompanying drawings represent respectively in front
and end elevation a portion of a double cylinder printing machine containing
my improvements Figures 3 and 4 are cross sectional views of portions of the same

page_text: and Figure 5 is a plan of a portion of the machine the upper cylinder being
removed; Figure 6 represents partly in end elevation and partly in cross section
a portion of the upper cylinder with the gripper and can arrangement applied
thereto drawn to a larger scale than the other figures of the drawings.
The same letters of reference indicate the same parts in the several figures of
the drawings.
a, a are the upper and lower cylinders respectively of the machine, the axes
of the said cylinders being in the same vertical plane. Both cylinders are hollow
and have openings or gaps b, b extending from end to end (see Figure 1). In one
of the openings of the upper hollow cylinder a and fixed to the said cylinder, is a
rode to which the gripper d for gripping and releasing at the proper times the
enamelled plate to be printed, is pivotted, the said gripper having near one end
an arm 2, the free end of which carries a roller c, the axis d' of which roller
projects through a curved slot f in one end of the upper cylinder (see Figure 1).
The gripper is normally preserved in its gripping position Figure 3, by a
spring g, but during certain portions of the rotation of the upper cylinder the
roller e coming in contact with the fixed cam plate h the arm is turned into
the position represented in Figure 4 when the gripper is removed from the upper
cylinder against the action of the spring g. The cam plate h is fixed by means of
a bracket i to one of the end framings of the machine (see Figures 1 and 2). The
roller e of the gripper arm or lever is so situated with respect to the cam
plate or releaser h that immediately the enamelled plate is drawn sufficiently
between the two cylinders of the machine to be seized and advanced by the
pressure of the said cylinders alone, the said roller e comes in contact with the
cam plate or releaser h and the enamelled plate to be treated is advanced solely
by the grip or pressure of the two cylinders (see Figures 4 and 6).
At the rear of the machine is a platform or receiver in the form of two angle
bars k, with guiding rollers, and a stop at the rear ends of the bars.
The enamelled plate 7 to be printed is fed, from the table in front of the cylinders,
into the machine as is represented in Figure 3, the front edge of the plate being
gripped momentarily between the gripper and the upper cylinder a the
gripper being opened so as to release the plate (see Figure 4) on the said plate
being advanced into the machine to such a distance as will ensure the grip of the
two cylinders on the plate advancing it horizontally between them. As the plate
passes from between the rollers it is received on the frame-like platform k, k.
The printing of the design on the enamelled plate is effected in lithographic
varnish which is afterwards dusted with vitreous enamel powder of the required
colour or colours; or the printing may be effected in enamel colour mixed
with lithographic varnish direct from the roller.
Where the design is to be effected in several colours the process is repeated for
each colour.
Or different portions of the design may be dusted with different enamel
colours, in which case only one printing is required.
The design printed on the enamelled plate is burned or finished in the
ordinary way.
!
My invention is applicable to enamelled plates of metals other than iron, such
for example as plates of enamelled copper.
Having now particularly described and ascertained the nature of my
invention and in what manner the same is to be performed I declare that I claim
as my invention:-
First The improvements in the production of enamel letters, inscriptions and
designs on enamelled plates of iron or other metal hereinbefore described and
illustrated in the accompanying drawings, the said improvements consisting
essentially in producing on a lithographic stone in the ordinary manner the
letters, inscription or design to be produced on the enamelled plate of iron or
other metal, mounting the lithographic stone with the design upon it on the

page_text: bed of a double cylinder tin plate printing machine modified in the manner
hereinbefore described and passing the enamelled plates through the machine and
subsequently treating the printed enamelled plates substantially as hereinbefore
described.
Secondly: The improvements hereinbefore described in machinery to be
employed in the production of enamel letters, inscriptions and designs on enamelled
plates of iron or other metal the said improvements consisting in so arranging
the cam plate or releaser of the double cylinder tin plate printing machine with
respect to the gripper that on the enamelled plate being seized by the pair of
cylinders the said enamelled plate is released by the gripper substantially as
herein before described and illustrated in the accompanying drawings.
Thirdly: In combination with a machine of the kind herein before described
and claimed in Claim 2 of a platform or receiver on to which the enamelled and
printed plates are passed by the pair of cylinders substantially as hereinbefore
described and illustrated in the accompanying drawings.
Dated the Eighteenth day of May 1899.