Year: 1889

page_text: I, MARCUS KATTENTIDT engineer of Hameln, Westphalia, in the Empire of
Germany do hereby declare the nature of this invention and in what manner the
same is to. he performed to be particularly described and ascertained in and by the
following statement :-
This present invention refers to a machine by means of which the glass or metal
plates are provided with a thin layer of gelatine in continuous succession in order to
produce dry plates for photographic purposes.
In the accompanying drawings this machine is shown in Fig. 1 in longitudinal
section, in plan in Fig. 2 whilst Fig. 3 represents a cross section on line a b Fig. 1.
Fig. 4 is a longitudinal section through the casting or pouring vessel and the
warming vessel below the same drawn to a larger scale.
Fig. 5. is a modification of the outlet arrangement of the casting vessel drawn to
an enlarged scale. Fig. 6 is a front view of same and Fig. 7 is a cross section
through the air cock.
Fig. represents the chain band in longitudinal section, Fig. 9 is a plan thereof
and Fig. 10 a cross section.
The necessary parts of the machine for the above described purpose are mounted on
the framework A in the following manner.
A double band conveyor in two parts runs the whole length of the framework A of
the machine, upon which band the plates n n to be covered with gelatine, are advanced
from one end of the machine to the other.
Referring to Figs. 1 and 2-the first part of the band conveyor system consists of
a double endless chain belt b, b, running over two rollers h, h, so that the upper part
thereof is on a level with the table a whilst underneath, the said chain belt is guided
and kept in tension by means of the rollers i, i, i. The second part of the band
conveyor system consists of a double endless band 62 62 which is mounted at the same
height.as the chain belt b, b and runs over the upper rollers o o and the lower tension
and guide rollers q, q, q. The lowest rollers i and q are mounted loosely in slots in
the framework, and by their weight distend the two band conveyors b, 6 and 62 62
respectively, over the rollers as shown in Figs. 1 and 3.

page_text: Movement is communicated to the band conveyor systems by means of the crank
handle and fly wheels, tooth wheels t, t, t, and by belt pullies uu for the second
band and by means of the pullies u, u¹ and crossed band for the first part of the band
conveyor system.
A pulley n' is mounted on the opposite end of the shaft of the roller / Fig. 2 on
which the upper belt pulley u¹ is keyed. This pulley n¹ by means of a cord or strap
communicates motion to a smaller pulley n² which is mounted on a shaft running in
suitable bearings on the framework of the machine and having keyed on its other
end a bevelled tooth wheel which gears with another bevelled wheel ¹. This
latter is keyed on to a shaft running in bearings and having thereon a rotary
brush c in the form of a roller. The brush c is so mounted that the plates n n Fig. 1
laid on the double band b b and moved along thereon, are brushed very clean before
coming under the casting vessel e. Then the properly regulated outflow of gelatine
on the moving glass or metal plates n n takes place. As however the plates do not
always touch each other and consequently some of the gelatine also finds its way on
to their other sides, I mount the rollers, underneath same and near the casting
vessel, in such manner that they are revolved by the plates passing along over them,
whereby the gelatine on the under side of said plates is removed and finally scraped
off the rollers by the scrapers or doctors flf. The plates n n continuing to move
along the double chain band or belt bb then come on to the second band conveyor
system b²² and are conveyed by the latter between a lower hot plate k, and an
upper cooling vessel 7, until they are completely dried and cooled and are removed
froin the table at the end of the framework A.
The hot plate R which may be made of one piece or several pieces as desired, rests
in the shaped cheek pieces of the framework (Figure 3) and may be kept at the
necessary degree of heat either by means of gas flames or in any other suitable
manner. The cooling vessel is as shown in Figure 1 divided into several compart-
ments in sach manner that the water entering at the furtherest, overflows therefrom
into the second by means of an overflow opening and in like manner from the second
into the third from whence it is allowed to run off by a pipe.
The cooling vessel is open above as shown and the bottom is made sloping from
the middle down to each side as shown in Fig. 3 or from one side to the other in
order that the steam condensing may not fall down in the form of drops of water on
the finished plates n n but may flow off by a gutter at the side.
11
The casting vessel e which contains the fluid gelatine, rests on the heating
chamber d and is pivotted thereon by means of the hinge bolt e¹ and the bent round
flaps or lugs f¹ see Fig. 4. The heating chamber d is adjusted as to height by
means of set screws w screwed into lugs d¹ and is provided with water connections v v
at the side for the in and out flow of hot water see also Fig. 6. The casting vessel e
is provided at one end with an outlet opening in a downward direction which forms a
narrow slit s the length of which is somewhat shorter than the breadth of the dry
plates nn the width being either constant as shown in Fig. 4 or adjustable as shown
in Fig. 5 by means of a movable plate provided with screws and fly vents ¹¹; the
cord packing serves to keep tight the joint between the plate and the body of the
casting vessel e thus preventing the gelatine from getting past and coming out above
the said plate l. A strip g of linen is fixed by means of a leather strip and screws g
along and underneath the mouth s' and turned round as shown in Figs. 4 and 5.
The linen strip Figs. 5 and 6 is turned round and encloses a thin wire or cord p
which goes through the projecting side lugs p¹ and is kept in tension by means of an
elastic band q' and hooks o' o¹ in such manner that the bent down under surface of
the linen strip g bears hard against the plates n n as they are passed along underneath
and the gelatine flowing down over the strip g is evenly distributed over the whole
surface of the plates nn.
The casting vessel e is as shown in Figs. 4, 5 and 6 provided with a curved tubular
hopper a above the mouth or exit s which serves for the introduction of gelatine
when the said vessel e is raised to its upright position on its hinge bolt e' whereby the
gelatine is also prevented from running away at the same time by the slit exit or

page_text: mouth s. The upper extension 1 of the heating vessel d then serves as heater and
support to the vertically placed casting vessel e when having fresh gelatine fed thereto.
The casting vessel e may also thus be put out of action when required by tipping it
up to an angle of 90°, whenever it is desired to interrupt the flow of the gelatine on
the plates n n.
The hopper has screwed thereon an airtight cover y provided with
an aircock. The plug of the cock has a way a¹ bored down its centre (Figs. 4, 5
and 7) and this central way communicates below with the hopper and above by the
several circumferential ways e' c¹ of the plug 2.
.
When the plug is turned, the circumferential ways c¹ c¹ are connected by the slot
or groove in the housing or body of the cock in such manner that the opening for
the air entering thereby may be increased gradually and according as more or less
gelatine is required to flow out of the casting vessel e so also the air cock is more or
less opened.
The endless bands or belts 66 662 are preferably half round in section (see
Fig. 10) so that they only touch the plates nn laid thereon along one line, in order
that the gelatine which may come under the plates shall be prevented from spreading
further and thereby rendering the plates useless.
The bands or belts b²² being weak they are strengthened by means of
specially constructed chains the members m¹ m¹ of which are made flat in section
(Figs. 8, 9 and 10).
The flat or lower sides of the bands or belts lie in the middle of these chains and
are fastened thereto by means of sewing, the thread passing through the band and
holes in the chains, or any other convenient mode of fastening may be employed.
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 :-
First. A casting machine for photographic dry plates in which there is a double
band conveying system such as the chain bands bb 22 the rollers hiii oo
and g 9 g, which are actuated from the fly wheel s. provided with crank handle by
means of tooth wheels t, t, t, the pulleys, or tooth wheels u u and u¹ u¹ with open and
crossed straps or belts, whereby the slantingly placed revolving brush c for cleaning
the plates before casting or pouring is revolved from the shaft of one of the band
rollers h, by means of the pulleys n¹ n² and the bevelled wheels whilst the
plates n n are brought along under the revolving brush c to the casting vessel e and
over the gelatine removing rollers ff and when cleaned arrive at the second band
conveyor system where the plate n n lying on the double band 62 62 arrive between
the heating or drying plate k and the cooling vessel 7 and are so completely dried
and cooled when they reach the delivery table that an uninterrupted and continuous
manufacture is rendered possible substantially as described and shown.
с
Second. In a casting or pouring machine as firstly claimed the arrangement of the
casting vessel which is pivotally connected to and mounted on the warming vessel
which is supplied with hot water for the purpose of keeping the casting vessel
always warm in such manner that the casting operation may be interrupted by
elevating the casting vessel on its pivot whenever desired substantially and shown.
Third. In a casting vessel as secondly claimed the arrangement of the curved
hopper with an air cock z having suitable passages in order to effect the regulation
of the entry of the air into the casting vessel and upon the gelatine and consequently
to make the gelatine come out slower or faster as desired substantially as described
and shown.
Fourth. In a casting vessel as secondly claimed the application of the plate l,
which is adjustable by means of screws and fly nuts and rendered tight above by
means of a packing cord k¹, and of the linen strip g which being turned over and
secured by the screws and leather understrip gl, is held in tension by means of the
wire p hooks o¹ o¹ and elastic cord q¹ on the side lugs p' p¹ in such manner that it
presses on the plates nn conveyed thereunder and distributes the gelatine evenly
thereon substantially as described and shown.

page_text: Fifth. In a casting machine operating as herein described the half round conveyor
bands 22 with their peculiar construction of chains m' m' upon which the flat
sides of the bands rest and to which they are fastened substantially as described and
shown.
Sixth. In a casting machine operating as herein described the arrangement of a
cooling vessel with three or more compartments with overflow and inclined bottom
for the gradual cooling of the plates n. n and for preventing the steam when con-
densing under the inclined bottom from dropping onto the plates in the form of
drops of water and again moistening the same substantially as described and shown
on the drawings.
Seventh. The construction of the machine shown on the drawings.
Dated this 25th day of February 1889.
MARCUS KATTENTIDT.
By Jensen & Son,
77, Chancery Lane, London, W.C.,
Patent Agents.