IMPROVED METHOD OF AND APPARATUS FOR COATING GLASS OR OTHER PLATES PAPER CARDBOARD OR OTHER MATERIAL WITH LIQUEFIED GELATINE OR OTHER FLUIDS PARTICULARLY APPLICABLE FOR COATING PLATES FOR USE IN PHOTOGRAPHY
Year: 1885

page_text: I ALEXANDER LAMONT HENDERSON of 49 King William Street in the City of
London Photographer do hereby declare the nature of "IMPROVED METHOD OF AND
APPARATUS FOR COATING GLASS OR OTHER PLATES PAPER CARDBOARD OR OTHER
MATERIAL WITH LIQUEFIED GELATINE OR OTHER FLUIDS PARTICULARLY APPLICABLE
FOR COATING PLATES FOR USE IN PHOTOGRAPHY," and in what manner the samė
is to be performed to be particularly described and ascertained in and by the
following statement:—
This invention has for its object an improved method and apparatus for the
coating of glass or other plates paper cardboard or other material with liquefied
gelatine or other fluids either alone or in combination with other bodies having
primary reference to its application for coating glass for use in photography.
And in order that my said invention may be understood I will now proceed to
describe the same with reference to the accompanying sheet of drawings in which
fig 1 shews elevation of an apparatus constructed according to my said invention.
Fig 2 is an end view thereof. Figs 3 and 4 Sheet 2 represent detached views
drawn to an enlarged scale. The same letters are employed in all views to indicate
the same parts. A represents a hot water bath heated by gas or other suitable
means and arranged so as to give light as well as heat as hereafter described
B shewn in dotted lines is a reservoir fitted in the bath A. to the bottom of which
is connected a grating stop cock c shewn enlarged at Figs 3 and 4 and hereafter
described and to this is fitted the 1 tube D having holes or slits e for the exit of
coating fluid The bath A is fitted on to a table F on which works an endless
band G made of any suitable material and passing over a series of rollers H and
on the axle of one of these is mounted a pulley over which a band M is passed in
order to revolve the rollers by foot or by other suitable means. The bath A and
reservoir B are formed underneath as shewn in that the space K may act as a
lantern by passing glass in that part marked L The action is as follows:-The
bath being charged with water and heated, the coating material is placed in the
reservoir B and the glass plates or other material N to be coated are placed on the
Price 411

page_text: band G the rollers H are then caused to revolve and upon the plates N or material
to be coated coming in contact with the bottom of the 1 D it will be pushed
forward in the direction of the arrow fig 1 and thus open the grating stop cock c
and allow the coating fluid to pass down and out through the slits or holes e on to
the material to be coated but when the plates leave the tube D this latter will
fall back to its normal position and thus close to stop cock c by which to coating
material will cease to flow. I have shewn a weighted lever U to ensure the closing
of the cock c. I will now describe the stop-cock c befored referred to and shewn
drawn to an enlarged scale at figs 3 and 4 sheet 2. Fig 3 a vertical section and
fig 4 section through line x, x fig 3. O shews a tube having openings P and O'
shews a short tube closed at its outer end, the other end (which revolves against
the tube O) has also openings P. Both the tubes 01 and O are mounted on a
spindle R and kept in forced contact by the spring S and nuts T so that when the
extra thickness of the material to be coated comes in contact with the tube D at Z
it will turn the tube O¹ round sufficiently to open the cock and allow the fluid to
pass out of the holes e but when the plates leave the tube it falls back sufficiently
to close the openings P in the disc O and thus stop the flow of coating fluid as
aforesaid.
Although I have described grating stop cock arrangement for causing the flow of
coating material to flow or cease as may be required I do not wish to limit myself
to this particular arrangement as I may in some cases employ other suitable means
or I may stop to flow by actuating a valve by hand when required. For instance
I may close the reservoir air tight and let or force air in when I wish the material
to flow or I may have a governor similar to a steam governor so as to obtain a
regular flow although the speed of working the rollers may vary. It will be found
preferable to work the rollers at one uniform speed.
.
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
Firstly In a method of and apparatus for coating glass or other plates or other
material with liquefied gelatine or other fluids substantially as set forth.
Secondly of the stop cock arrangement c for regulating the flow of coating
material to the plates shewn clearly in figs 3 and 4 of the drawing substantially as
set forth.