A New or Improved Apparatus for Coating Photographic Plates or Paper.
Year: 1885

page_text: PROVISIONAL SPECIFICATION.
A New or Improved Apparatus for Coating Photographic Plates
or Paper.
I BENJAMIN JOSEPH EDWARDS of The Grove Hackney in the county of
Middlesex Photographer do hereby declare the nature of my invention for
A NEW OR IMPROVED APPARATUS FOR COATING PHOTOGRAPHIC PLATES OR
PAPER to be as follows:-
My object is to provide an apparatus by means of which it shall be possible to
regulate or control the even flow of gelatine emulsion or other fluid onto the
surface of glass or other plates, or paper, spread or distribute it more evenly on
the surfaces to be coated, and which shall also effect a saving of the material used.
In carrying out my invention I make use of a chamber which may be of any
convenient shape, though by preference I employ a tube of metal or other suitable
material; which I call a distributor; and I connect it by means of a flexible or
elastic pipe to the reservoir containing the emulsion, in such a position that it shall
be always filled or nearly filled, with the emulsion wheu in use-I make this
distributor of such a length that it shall equal the width of the largest articles to
be coated, and I close the ends with pistons or plungers of the shape required;
then by adjusting the positions of these pistons I am able to regulate the length
made use of when smaller articles are being coated, I make the rods by which
these pistons are worked hollow and attach to one or both the elastic pipe which
connects the distributor with the reservoir of emulsion. Along one side of the
distributor I make a number of slits or openings, or a single narrow slit, through
which the emulsion flows, and I regulate the exact quantity which is allowed to
pass by altering the sizes of the openings, by means of a cover plate which slides
or revolves over the opening or openings in the distributor and may be adjusted
with the greatest nicety, this cover plate may be external or internal, or if preferred
the distributor may be arranged to slide or revolve upon a stationary cover plate.
By completely covering the openings I can also stop the flow of emulsion entirely
at any moment.
The distributor when in use is supported so that the under surface is in contact
or nearly in contact with the upper surface of the plates or paper, which are made

page_text: to pass under the distributor in a continuous train by means of an endless band
worked by any convenient motor: or the distributor alone may be used by hand,
by being drawn over the plates or paper.
In order to keep the emulsion in a suitable condition for use I employ a hot
water tank or cistern of convenient size and shape, and I fix my distributor so
that it shall be in contact and partly surrounded by the tank. I provide suitable
supply and discharge pipes on the tank in order to regulate the temperature.
When the distributor is used in combination with moving plates I support it
upon a suitable pivoted frame or levers as described in my patent specification
N° 8643 A.D. 1884.

page_text: A New or Improved Apparatus for Coating Photographic Plates
or Paper.
I BENJAMIN JOSEPH EDWARDS of The Grove Hackney in the county of
Middlesex Photographer do hereby declare the nature of my invention for
A NEW OR IMPROVED APPARATUS FOR COATING PHOTOGRAPHIC PLATES AND
PAPER and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, reference being had
to the accompanying drawing:-
My object is to provide an apparatus by means of which it shall be possible to
regulate or control the even flow of gelatine emulsion or other fluid on to the
surface of glass or other plates, or paper, spread or distribute it more evenly on the
surfaces to be coated and also effect a saving of the material used.
In carrying out my invention I make use of a chamber which may be of any
convenient shape, though by preference I employ a tube of metal or other suitable
material, which I call a distributor, and I connect it by means of a flexible or
elastic pipe to the reservoir containing the emulsion in such a position that it shall
be always filled or nearly filled with the emulsion when in use-I make this
distributor of such a length that it shall equal the width of the largest articles to
be coated.
In order to keep the emulsion in a suitable condition for use, I employ a hot
water tank or cistern of convenient size and shape, provided with supply and
discharge pipes by which I regulate the temperature, and I fix my distributor so
that it shall be in contact with the tank.
Along one side of the distributor I make a number of slits or openings through
which the emulsion flows and I regulate the exact quantity which is allowed to.
pass by altering the area of the openings by means of a cover plate which slides or
revolves over the openings in the distributor and may be adjusted with the greatest
nicety, this cover plate may be external or internal or the distributor may be
arranged to slide or revolve upon a stationary cover plate, which is attached to or
forms part of the hot water tank above described. By completely covering the
openings I can also stop the flow of emulsion entirely at any moment.
I keep the distributor in position by means of an elastic band at each end or
other convenient method.
In order to regulate the width of the flow of the emulsion I close one or both
ends of the distributor with pistons or plungers of the shape required; then by
adjusting their positions, I am able to regulate the length made use of when
smaller articles are being coated. When desired I make the rods by which these
pistons are worked hollow and attach to one or both the elastic pipe which
connects the distributor with the reservoir of emulsion.
The distributor when in use is supported upon a suitable pivoted frame or levers
so that the under surface is in contact or nearly in contact with the upper surface
of the plates or paper, which are made to pass under it in a continuous train by
means of an endless band worked by any convenient motor. Or the distributor
may be used by hand by being drawn over the plates or paper.

page_text: Referring now to the accompanying drawing, in which similar letters indicate
similar parts throughout-
Figure 1 is an end view and Figure 2 a front view of the apparatus arranged for
working in a moveable frame in combination with an endless band upon which the
plates or paper are carried.
Figure 3 shows a form of piston which may be used for regulating the width of
the flow of the emulsion.
In figures 1 and 2 the distributor which contains the emulsion is represented by
the letter A while B is the hot water tank, by means of which the temperature of
the emulsion is regulated, C C show the openings through which the emulsion
flows to the articles to be coated,' and D'is a handle or lever by means of which
the tube or distributor is made to revolve in order to regulate the size of the
openings, O is a screw for adjusting the handle D to any exact position; the
flexible supply pipe which conveys the emulsion to the distributor is represented
By the letter E, and the hot water supply pipe for the tank by F, while G is the
overflow pipe. H H are the elastic bands which hold the distributor in position.
In figures 1 and 2 the table upon which the machine works is marked I and the
endless band which carries the plates to be coated J, while the plates themselves
are represented by the letter K. The brackets L carry the arms M, upon which
the distributor is supported at F and the roller N-regulates the position of the
apparatus according to the thickness of the plates being coated, which pass
underneath it.
In figure 3 the end of the distributor A is shown in section together with the
moveable piston or stop P which is attached to the supply pipe E.
To operate the machine as shown in figures 1 and 2, the pistons P having first
been regulated to give the desired width of flow of emulsion, the motor is started
and the plates or paper, which are arranged upon the band J begin to move along,
at the same time the handle D is turned so as to open the slots C C as may be
required and the emulsion flows upon the plates (or paper) as they pass along,
they are then carried by another band through a cooling chamber or tunnel and
afterwards placed in racks to dry.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is,
:
1. In an apparatus for coating plates or paper with gelatine emulsion or other
fluid, the perforated distributor so arranged that the flow of the liquid can be
exactly adjusted or stopped entirely, substantially as and for the purposes shown
and described.
2. In an apparatus for coating plates or paper with gelatine emulsion or other
fluid, the method of adjusting the width of flow of the material by means of
pistons or stops substantially as and for the purposes shown and 'described.
3. In an apparatus for coating plates or paper with gelatine emulsion or other
fluid the use of a hot water tank in contact with the distributor substantially as
and for the purposes shown and described.

page_text: PROVISIONAL SPECIFICATION.
A New or Improved Apparatus for Coating Photographic Plates
or Paper.
I BENJAMIN JOSEPH EDWARDS of The Grove Hackney in the county of
Middlesex Photographer do hereby declare the nature of my invention for
A NEW OR IMPROVED APPARATUS FOR COATING PHOTOGRAPHIC PLATES OR
PAPER to be as follows:-
My object is to provide an apparatus by means of which it shall be possible to
regulate or control the even flow of gelatine emulsion or other fluid onto the
surface of glass or other plates, or paper, spread or distribute it more evenly on
the surfaces to be coated, and which shall also effect a saving of the material used.
In carrying out my invention I make use of a chamber which may be of any
convenient shape, though by preference I employ a tube of metal or other suitable
material; which I call a distributor; and I connect it by means of a flexible or
elastic pipe to the reservoir containing the emulsion, in such a position that it shall
be always filled or nearly filled, with the emulsion when in use-I make this
distributor of such a length that it shall equal the width of the largest articles to
be coated, and I close the ends with pistons or plungers of the shape required;
then by adjusting the positions of these pistons I am able to regulate the length
made use of when smaller articles are being coated, I make the rods by which
these pistons are worked hollow and attach to one or both the elastic pipe which
connects the distributor with the reservoir of emulsion. Along one side of the
distributor I take a number of slits or openings, or a single narrow slit, through
which the emulsion flows, and I regulate the exact quantity which is allowed to
pass by altering the sizes of the openings, by means of a cover plate which slides
or revolves over the opening or openings in the distributor and may be adjusted
with the greatest nicety, this cover plate may be external or internal, or if preferred
the distributor may be arranged to slide or revolve upon a stationary cover plate.
By completely covering the openings I can also stop the flow of emulsion entirely
at any moment.
The distributor when in use is supported so that the under surface is in contact
or nearly in contact with the upper surface of the plates or paper, which are made

page_text: to pass under the distributor in a continuous train by means of an endless band
worked by any convenient motor: or the distributor alone may be used by hand,
by being drawn over the plates or paper.
In order to keep the emulsion in a suitable condition for use I employ a hot
water tank or cistern of convenient size and shape, and I fix my distributor so
that it shall be in contact and partly surrounded by the tank. I provide suitable
supply and discharge pipes on the tank in order to regulate the temperature.
When the distributor is used in combination with moving plates I support it
upon a suitable pivoted frame or levers as described in my patent specification
N° 8643 A.D. 1884.

page_text: COMPLETE SPECIFICATION.
A New or Improved Apparatus for Coating Photographic Plates
or Paper.
I BENJAMIN JOSEPH EDWARDS of The Grove Hackney in the county of
Middlesex Photographer do hereby declare the nature of my invention for
A NEW OR IMPROVED APPARATUS FOR COATING PHOTOGRAPHIC PLATES AND
PAPER and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, reference being had
to the accompanying drawing:
--
My object is to provide an apparatus. by means of which it shall be possible to.
regulate or control the even flow of gelatine emulsion or other fluid on to the
surface of glass or other plates, or paper, spread or distribute it more evenly on the.
surfaces to be coated and also effect a saving of the material used.
In carrying out my invention I make use of a chamber which may be of any
convenient shape, though by preference I employ a tube of metal or other suitable.
material, which I call a distributor, and I connect it by means of a flexible or
elastic pipe to the reservoir containing the emulsion in such a position that it shall
be always filled or nearly filled with the emulsion when in use-I make this
distributor of such a length that it shall equal the width of the largest articles to
be coated.
In order to keep the emulsion in a suitable condition for use, I employ a hot
water tank or cistern of convenient size and shape, provided with supply and
discharge pipes by which I regulate the temperature, and I fix my distributor so
that it shall be in contact with the tank.
Along one side of the distributor I make a number of slits or openings through
which the emulsion flows and I regulate the exact quantity which is allowed to
pass by altering the area of the openings by means of a cover plate which slides or
revolves over the openings in the distributor and may be adjusted with the greatest
nicety, this cover plate may be external or internal or the distributor may be
arranged to slide or revolve upon a stationary cover plate, which is attached to or
forms part of the hot water tank above described. By completely covering the
openings I can also stop the flow of emulsion entirely at any moment.
keep the distributor in position by means of an elastic band at each end or
other convenient method.
In order to regulate the width of the flow of the emulsion I close one or both
ends of the distributor with pistons or plungers of the shape required; then by
adjusting their positions, I am able to regulate the length made use of when
smaller articles are being coated. When desired I make the rods by which these
pistons are worked hollow and attach to one or both the elastic pipe which
connects the distributor with the reservoir of emulsion.
The distributor when in use is supported upon a suitable pivoted frame or levers
so that the under surface is in contact or nearly in contact with the upper surface
of the plates or paper, which are made to pass under it in a continuous train by
means of an endless band worked by any convenient motor. Or the distributor
may be used by hand by being drawn over the plates or paper.

page_text: Referring now to the accompanying drawing, in which similar letters indicate
similar parts throughout-
Figure 1 is an end view and Figure 2 a front view of the apparatus arranged for
working in a moveable frame in combination with an endless band upon which the
plates or paper are carried.
Figure 3 shows a form of piston which may be used for regulating the width of
the flow of the emulsion,
->
In figures 1 and 2 the distributor which contains the emulsion is represented by
the letter A while B is the hot water tank, by means of which the temperature of
the emulsion is regulated, CC show the openings through which the emulsion
Blows to the articles to be coated, and D is a handle or lever by means of which
the tube or distributor is made to revolve in order to regulate the size of the
openings, O is a screw for adjusting the handle D to any exact position; the
flexible supply pipe which conveys the emulsion to the distributor is represented
by the letter E, and the hot water supply pipe; for the tank by F, while G is the
overflow pipe. H H are the-elastic bands which hold the distributor in position.
In figures 1 and 2 the table upon which the machine works is marked I and the
endless band which carries the plates to be coated J, while the plates themselves
are represented by the letter K. The brackets L carry the arms M, upon which
the distributor is supported at F and the roller N., regulates the position of the
apparatus according to the thickness of the plates being coated, which pass
underneath it.
•
In figure 3 the end of the distributor A is shown in section together with the
moveable piston or stop P which is attached to the supply pipe E.
To operate the machine as shown in figures 1 and 2, the pistons P having first
been regulated to give the desired width of flow of emulsion, the motor is started
and the plates or paper, which are arranged upon the band J begin to move along,
at the same time the handle D is turned so as to open the slots C C as may be
required and the emulsion flows upon the plates (or paper) as they pass along,
they are then carried by another band through a cooling chamber or tunnel and
afterwards placed in racks to dry.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is,
1. In an apparatus for coating plates or paper with gelatine emulsion or other
fluid, the perforated distributor so arranged that the flow of the liquid can be
exactly adjusted or stopped entirely, substantially as and for the purposes shown
and described.
2. In an apparatus for coating plates or paper with gelatine emulsion or other"
fluid, the method of adjusting the width of flow of the material by means of
pistons or stops substantially as and for the purposes shown and described.
3. In an apparatus for coating plates or paper with gelatine emulsion or other
fluid the use of a hot water tank in contact with the distributor substantially as
and for the purposes shown and described.