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Патент USA US2292521

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Aug. 11‘, 1942.
' 2,292,521
J. HORN; '
Filed July 6, 1938 ' -
v4 Sheets-Sheet 1
270.557: ?o/e'lv
Aug. 11,1942.
Filed July 6, 193a
'4 Sheets-Sheet 2
JOSE}: Hoe/v
B6422?!) gym» .
Aug- 11,1942-
‘Filed July 6- 1938
.4 Sheets-Sheet s
Aug. 11,1942.
' 2,292,521
Filed July 6' 19-38
4 SheetsI-Sheet 4
‘759557- Hoe/v
Patented Aug. '11,‘ 1942
r 2,292,521"
4 2,292,521
Josef Horn, Wiesbaden-Biebrich, Germany, as
signor, by mesne assignments, to Helge Sven- ,
' son, Goteborg, Sweden -
ApplicationlJuly c, 1938. Serial No. 217,659
GermanyJuly 19, 1937
4 Claims. (01. 271__w
' The,invention relates to a device for making
a throttle valve or ?ap may be used. ;It is pre
photo copies, particularly for a device suitable ferred to, employthe samé fan or like device for
for- the preparation of diazo types. By means of
supplying the blast air to the nozzle and, for suc
the new device both the ?ghting or exposure
tion in the suction table.
and the developing processes can be carried out 5
Another object of the invention is a rotating
in one working operation. v
circular brush which rotates oppositely to the
One object of the invention is an apparatus for
direction of movement-of the copy, and sweeps
the exposure of light sensitive material. Another
the copy with its brushes. This brush may‘be
object of the invention is an apparatus for the
used instead of the nozzle referred to.
development of the exposed material. A further 10 A particularly reliable separation of copy from v
object of the invention is a suction table over
the original may be attained by combining- the
which runs a porous transport or conveyor band.
‘ This suction table is so arranged that the. ap
. pertaining transport band conveys the copies
above described methods and using in addition to '
a second suction table, an air blast nozzle and/or
rotating brush;
leaving the exposure apparatus to the developing
apparatus.- The exposure apparatus is preferably
the following I description.
provided in the usual manner with a‘ band con
being suitably arranged for this purpose. '
Another object of the invention is a second suc
tion table over which too a porous transport
band runs. Thissuction‘ table is used for the
separation of the original from the copy adher
A constructional form ofthe-invention is illus
f trated by way of example in the accompanying
In that case the same transport band
_- may be used also for the suction table,.the latter
Other objects of the invention will be seen from
drawings. Fig. 1 is a front elevation of the ap
20 paratus. Figs.‘ 2 and 3 are two‘ side-elevations.
Fig. 4 is a' section on'line H ofFig. 1. The
modi?cation shown‘ and described speci?cally is,
>however,,not intended to in any way limit the
scope of applicant's invention.
ing to the?rst'mentioned suction table and for 25 ' _In the drawings. the numeral I (Fig. 4). indi
carrying away the original. As the copy and the
cates sources of light, for‘ instance arc lamps or
original usually adhere to one another rather
mercury vapour lamps. The light emitted by
strongly owing to the occurrence of electric
these sources falls upon a bent glass plate 2.
forces, a fairly considerable force is required for
the separation. The second suction table is pref
erab‘ly so arranged that the ‘suction ‘surfaces of
re?ector I is ?xed by means of an angle iron 4
to a ‘casing wall I. Aporous transport band 6 -
the two tables face one ano'ther,'the tables being
A" '
" runs over guide‘rollers‘ ‘I, 8 and 9, a tension roller '
~ so arranged at an angle as to converge towards
all and a suction table II, and is pressed ‘against
the glass plate 2. The band- may, for instance,
one another in the form of an arrow. The point
. be made of felt or a ?nely perforated rubber
of the arrow should then‘ be arranged close to the 35 band. Tensioning device I! is of the usual con
point at which the copy and the original leave
struction. The suction table II which is-prefer
the exposure apparatus. Instead of separating
ably providediwith a slightly convex suction sur
the original from the copy‘ by suction, other, ' face, is; also constructed in the usual manner; It
means can be used for the separation of the
consists substantially of a sheet iron box, the
original from the copy, for instance compressed 40 operative side of which is perforated. The in
air or other gas may be blown between the, two.
Inv consequence of‘ this a further object of the
invention is an air blast nozzle arranged in‘ the
. vicinity of the suction table, which acts upon the '
terior of the box is connected by means of a duct
' IS with a fan “or other suction producing de
Another’porous transport band I! runs
over rollers I6 and I1, tensioning roller I8 and a _
copy, in such a‘manner that theair jet-issuing 45 second suction table‘ 19, and is pressed upon a
part of its path-against the transport band ‘6.
preferably the leading edge of the copy ‘(in the
The suction table ll is connected by means of a A
‘ direction of‘ movement of the copy). The suction
pipe 1| with the suction device It. The numeral
from the nozzle is blown against an edge, and
table is then preferably so arranged that the
30 indicates means for fixing the suction tables.
_ original detached from the copy, can freely fall 50 A developing apparatus 21 comprises as an essen
down under the action of gravity. The non-1e
tial part a developer chamber 2| with perforated
referred to is preferably provided with a dis- '
charge slot which extends over the whole width
top plate‘ 22. An ammonia solution is evaporated by means of an ‘electric heater It in a trough 23. .
of the suction table. It is advisableto arrange
The ammonia gas is further heated by heaters,
the nozzle turnably. For controlling the air blast. V55 25. The transport band "which runs over roll
a developing liquid may, of course, be used if de
sired. The copy and original respectively are
original is carried away by the band ll and
drops upon the delivery plate It upon which it
slides to ‘the point D leaving then the apparatus.
The copy is further transported by the trans
port band‘ i and travels guided by the guide mem
ber 31 to the developing machine. After passing
through the developing machine, the finished
of a tensioning device 36 against the transport
band 26. A scraper 31 bears with its edge against
It, to enable the copy, which, in practice, pro
iects beyond the original, to be sucked in a re
ers 21 and II, is pressed against the perforated
top plate 22 of the ammonia container. The roll
er :1 is constructed as a tensioning roller. In
stead of the illustrated developing device, any
other suitable developer using developing gas or
copy drops into a chute constituted by the guide
guided by guide members II, 32 and a made, for
member 32, from which it is taken away. Pref-.
instance, of sheet iron. A roller II‘ is rotatably
mounted upon lever 35 which is pivotally attached 10 erably the suction force of the suction table II
should be greater than that of the'suction table
to shaft 64. This roller :4 is pressed by means
the transport band 6. The various transport
bands are driven by a motor 38.
liable manner by the suction table II. The suc
15 tion forces of both tables may be regulated by
A table 39 is provided for facilitating the in
sertion of the original and the copy into the
apparatus. The developing gas is produced from
built-in throttle valves or other means.
I claim:
i. In a machine for printing. and developing
photo copies, a device for separating the original
a'solution contained in a container 40. The solu
exposed copy which comprises a suetion is supplied by means of ‘a pipe ll to the 20. >i'rom'the
tion table, a porous conveyor‘ adapted to trans
trough 23. ‘A valve 60 is provided with a set screw
port the exposed copy over said-suction table, a
8| by means of which ‘the supply of the solu
further suction table and a porous transport band
tion of the developing gas to‘the trough 23 can
in combination with this suction table, the last
be regulated. The shafts of the tensioning rollers
l8 and 21 are mounted upon levers M and I5 25 mentioned suction table being so arranged that it ,
tumable about pivots l2 and 43 respectively. The '
rollers may be adJusted in'- known manner by
means of setting devices 46 and 41 respectively.
is capable of separating the original from the
copy acted upon by the first mentioned suction
2. A device according to claim 1 wherein the
table which acts upon the photo copy has
mit drive from motor 38 to the rollers by means 30
greater suction power than the suction table
of chains 55 and 5B which are kept under ten
acting upon the original.
sion by sprocket wheels 51- and 58, respectively.
3. In a machine for printing and developing
The temperature‘of the developing gas is indi
Sprocket wheels I8, 49. 50, 5|,- 52, 53 and 54 trans
cated by a thermometer 59.
photo copies, a device for separating the original
The mode of operation of the described ap 35 from the exposed copy which comprises a suc
tion table, a porous conveyor adapted to transport
paratus is as follows: The light sensitive paper
exposed copy over said suction table, a further '
and the original from which a copy is to be pro
suction table and a porous transport band in com
duced, are placed upon the .table 39. The intro
bination with this suction table, the last-men
duction of the copying paper and original into
tioned suction table being so arranged that the
the exposure device takes place at the point A.
tables converge like a V at the point where they
The copy and the original are then moved for
?rst come'into contact with the photo copy or
ward between the glass plate 2 and the transport
the original respectively, the suction faces of the
band 6, exposure taking place at the same time.
At the point 13 exposure is completed. _ Copy
and original move from this point, further be- '
tween the transport bands 6 and i5. Underneath
the roller 8 separation of copy and original is ef
fected by the action of the suctionztables. The
two suction tables facing one another.
4. A device according to claim 3 wherein the
porous conveyors passing over the suction tables
are of perforated rubber.
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