Improvements in and relating to the Impregnation of Paper.
Year: 1899

page_text: Date of Application, 27th Mar., 1899
Complete Specification Left, 20th Dec., 1899-Accepted, 10th Feb., 1900
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Impregnation of Paper.
I, FRIEDRICH GUSTAV JULIUS POST, of 4, Steintwiete, Hamburg, in the Empire
of Germany, Manufacturer, do hereby declare the nature of this invention to be
as follows:-
My invention relates to a new method or process of treating paper for the
purpose of impregnating the same with any suitable liquid designed to adhere
permanently or for a certain time to the paper.
My improved method for impregnating unsized or weakly sized paper for pro-
ducing, for instance, coloured silk-paper, paraffinized paper, moistened copy-
ing-paper and the like consists in tightly winding-up the paper and then admitt-
ing the liquid impregnating substance to penetrate the paper either by utilizing
the absorbing quality of the paper only, or with the aid of a certain pressure or
vacuum, or by employing one or all of these means simultaneously or successively.
Owing to this method of impregnation the impregnating substance is prevented
from entering the paper in excess, as would be the case, if the paper were treated
in the method hitherto employed, that is to say, by first saturating, and then
pressing the paper between felt or other absorbing means.
Although the capacity of the paper-roll of absorbing the impregnating sub-
stance is limited by the pressure applied to the roll, it is not necessary to carry
the impregnation to this limit. A uniform impregnation of the paper may be
also obtained by using less impregnating substance than the paper will absorb
under the given pressure, if ample time is given for the impregnating liquid
to diffuse throughout the paper-roll. In such case less pressure is required,
which however must not be reduced to such an extent, that a translocation of
the layers will take place, or that the paper will be liable to wrinkle in conse-
quence of the penetration of the liquid.
When it is desired to moisten rolls of copying paper in the manner described
it has been proved advantageous to surround the paper roll by means of a woven
or felted fabric having considerable absorbing capacity, for the purpose of pre-
venting the outer layers of the paper roll, dipping into the moistening water,
to soften and then to detach from the roll.
It is obvious that paper rolls, produced by winding upon a single arbor or
drum a plurality of paper bands instead of a single band, may be employed, if,
for instance, my invention is to be used for copying letters, and a plurality of
copies is required to be made at the same time from the original letter or other
written document.
This method of impregnating paper is particularly applicable for impregnating
paper-rolls used for copying purposes, since the moistening or damping of the
copying-paper may be controlled in such a manner, that clear and distinct
copies will always be obtained.
Dated this 27th day of 1200
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: Improvements in and relating to the Impregnation of Paper.
I, FRIEDRICH GUSTAV JULIUS POST, of 4, Steintwiete, Hamburg, in the Empire
of Germany, Manufacturer, do hereby declare the nature of this 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 relates to a new method or process of treating paper for the
purpose of impregnating the same with any suitable liquid designed to adhere
permanently or for a certain time to the paper, and it more particularly refers
to the preparation of copying or tissue paper so that it may be used in the copy-
ing press.
According to my invention the moistening of the tissue paper itself by means
of a brush or saturated roller, as heretofore employed, has now been practically
abandoned, owing to the difficulty in obtaining a uniformly. moistened sheet
containing just sufficient moisture to obtain a clear copy and leave the original
uninjured.
My invention has therefore for its object a method whereby the preparation of
tissue or copying paper for the press is greatly facilitated, and all danger of
super saturation practically avoided, and whereby a supply of prepared paper
sufficient for obtaining great numbers of copies may be had in a very compact
form.
In carrying out my invention I wind a web of tissue paper, of the required
tensile strength to be unwound when wet without tearing into a compact roll,
the winding being preferably effected under pressure. Inasmuch as the capacity
for absorbing water by paper wound into a roll depends upon the pressure under
which the paper is wound i.e. the compactness of the roll, the amount of water
to be used can readily be determined or regulated, so that supersaturation can
be effectually avoided, hence also the necessity of removing excess of moisture
before use. The roll of tissue or copying paper may then be immersed in water,
or the absorption of the water may be expedited by winding the tissue on a
tubular perforated mandrel, immersing said roll in a body of water, and apply-
ing suction to the mandrel to form a partial vacuum therein, and thus draw the
water through the layers of tissue.
I prefer, however, to partly immerse the roll of tissue in a body of water of
greater volume than is actually required to moisten the roll of tissue to the
required degree, so that after absorption by the tissue of the desired or required
quantity of water the level of the latter will be lowered to such an extent as
no longer to be in contact with the roll. In this operation the roll may if desired,
and preferably is, revolved until the water is no longer in contact with the roll
of tissue, which is then left until the web is completely permeated by the water.
Furthermore, with a view to obtaining manifold copies, a plurality of webs of
tissue or copying paper may be simultaneously wound into a roll and moistened
as described, and then unrolled simultaneously, as will be readily understood.
To prevent the outer convolutions of the roll from puckering and from becom-
ing too soft by reason of super-saturation, and thus readily separating and tear-
ing from the roll, I envelop the same in a fabric capable of absorbing and holding
considerable moisture, as for instance a sheet of felt or the like, this being also
of advantage where a number of rolls of tissue are prepared for future use, thus
preventing evaporation of the water from the outer convolutions.
In the accompanying drawings I have shown in Figures 1, 2 and 3, by vertical
sectional views, various means for moistening the rolls of tissue.

page_text: The apparatus consists essentially of a suitable vessel e provided with forked
bearings for the journals of the mandrel b of the roll of tissue a.
g
As shown in Figure 1 the roll of tissue a may be immersed in the water
until a sufficient quantity thereof has been absorbed, the roll being revolved
or not as desired, after which the roll is removed. In Figure 3 I have shown
the vessel el connected with an overhead water reservoir h, the connecting pipe e
being provided with a stop cock e. The mandrel on which the roll a is mounted
or wound, is in this case tubular and perforated and closed at one end, its open
end being connected with a pipe f extending outside of the vessel c¹ through
a suitable stuffing box, and provided with a stop cock f, said pipe f being con-
nected with a suction pump i.
As hereinbefore stated, the preferred mode of moistening tissue in the roll
is to partly immerse the same in a body of water, as shown in Figure 2, so that
after absorption of a certain quantity of the water the level thereof will sink
below and out of contact with the roll.
These rolls of moistened tissue are for use preferably transferred to a casing
adapted to be closed and to be arranged in proper relation to the copying press,
the casing being provided with bearings for the mandrel and with a narrow
slot through which the web of tissue is drawn.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what
I claim is:-
-
1. The mode of preparing tissue paper for copying purposes, which consists
in compactly winding a web of such into a roll, placing said roll in contact
with water until a given quantity thereof has been absorbed, removing the roll
from contact with the water and allowing the inner convolutions of tissue paper
to absorb the excess of water in the outer convolutions for the purpose set forth.
2. The mode of preparing tissue paper for copying purposes, which consists
in compactly winding a plurality of webs of such simultaneously into a roll,
placing the latter in contact with water until a given quantity thereof has
been absorbed, removing the roll from the water and allowing the inner con-
volutions of tissue to absorb the excess of water in the outer convolutions for
the purpose set forth.
3. The mode of preparing tissue paper for copying purposes, which consists
in winding a web of such a compact roll, enveloping the latter in an absorbent
fabric and placing the roll in contact with water until a suitable quantity thereof
has been absorbed by said fabric and tissue, for the purpose set forth.
4. The mode of preparing tissue paper for copying purposes, which consists
in winding a web of such into a compact roll, placing the same in a body of
water so that when a given quantity thereof has been absorbed its level will
be so changed as no longer to be in contact with the roll, and allowing the
inner convolutions of tissue paper to absorb the excess of water in the outer
convolutions for the purpose set forth.
Dated this 20th day of December 1899
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: Date of Application, 27th Mar., 1899
Complete Specification Left, 20th Dec., 1899-Accepted, 17th Feb., 1800
Improvements in Apparatus for Copying Documents.
I, FRIEDRICH GUSTAV JULIUS POST, of +, Steintwiete, Hamburg, in the Empire
of Germany, Manufacturer, do hereby declare the nature of this invention
to be as follows:--
This invention relates to roller copying apparatus for copying letters and other
documents upon a continuous web of paper or upon two continuous webs of
paper simultaneously.
In a roller copying-machine designed to produce simultaneously copies of the
writing on both sides from the original letter or document, or of the writing from
two letters or written documents placed one upon the other with the two backs
ogether, rolls of copying paper duly impregnated or moistened may be arranged
in cases or boxes next to the copying or pressure rollers in such a manner, that
both the paper webs may be led through the said pressure-rolls and drawn off
from the paper rolls while the documents desired to be copied are fed from an
inclined table between the two webs or bands of the copying paper and the
pressure-rolls by causing the latter to rotate.
While the upper pressure roll is preferably journalled in fixed bearings each
pivot of the lower pressure-roll is journalled at the free end of a lever which is
influenced by a weighted lever, in order to apply the necessary pressure upon
the lower pressure-roll and the copying-paper and documents that distinct im-
pressions of the latter may be taken on the webs.
The action of the pressure-rolls upon the copying-paper webs causes the latter
to be unwound from their rolls and particular reels may be provided for separ-
ately receiving the copying-paper webs; all parts I arrange and combine in such
a manner, that I am enabled to produce such copies continuously instead of
intermittently, and a particular advantage of my roller copying-machine in
combination with my improved method of impregnating the copying-paper
described in the specification of prior application No. 6579 consists in the fact
that the machine is at any time in working order as long as the copying-paper
rolls are not consumed.
Improvements in Apparatus for Copying Documents.
I, FRIEDRICH GUSTAV JULIUS POST, of 4, Steintwiele, Hamburg, in the Empire
of Germany, Manufacturer, do hereby declare the nature of this invention
Paine R17

page_text: and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
—
My invention relates to a copying-press in which a pair of pressure-rollers are
made to operate in combination with one or more rolls of moistened paper; and
it consists of the peculiar construction and arrangements of parts, hereinafter
more fully described, and illustrated in the accompanying drawing, in which:
Figure 1 is a side elevation, partly in section of my improved copying-press,
and Figure 2, a detail showing diagrammatically the arrangement of one pair
of copying-paper rolls, the pressure-rollers and an inclined table from which
the documents to be copied are fed between the webs of the two paper-rells.
Similar letters refer to similar parts throughout the several views.
In the drawing a copying-press is illustrated which is particularly designed to
produce simultaneously copies of the writing or print on both sides of a manu-
script, or of the writing from one side of two written or printed manuscripts
placed one upon the other back to back. To this effect two rolls of copying
paper a a (Figure 2) duly impregnated or moistened are enclosed by cases or
boxes (Figure 1) and arranged parallel to the copying or pressure rollers!!
of india-rubber in such a manner, that both the paper webs m m may be led
through the said pressure rollers and while the latter are turned, drawn off from
the paper rolls, which are thus caused to turn about their arbors b b (Figure 2)
within the cases kk. The manuscript documents or writings to be copied are
fed from the table u and guided by the inclined slider between the two webs m m
and the pressure rollers // by causing the latter to rotate.
While the arbor of the upper pressure roller is journalled in fixed bearings
of the main frame A, each pivot of the lower pressure roller is journalled at
the one free end of a double-armed lever », which is fastened on an arbor o
traversing the frame A and journalled in suitable bearings thereof. Upon the
other free end of each lever n bears a set screw under the influence of a
weighted lever, which swings about its fulcrum t fixed to the frame A and may
be set at rest by means of a suitable support or stays (Figure 1). If the latter
is turned sideways the weighted levers are set free to act upon the long arm
of the levers a through the medium of the set screws whereby the lower
pressure roller is pressed gently against the upper roller, in order to exert the
necessary pressure upon the moistened copying paper and the manuscript for
taking distinct impressions from the latter, while the upper pressure roller is
rotated by positive motion.
From the foregoing it is obvious, that the four sides of a double-sheet manu-
script, if duly spread out, may be at once copied, or simultaneously impressions
taken on the two webs of copying paper from one side of two manuscripts placed
one upon the other back to back, which is of great advantage if compared with
the roller-copying presses heretofore employed.
The webs m m of the copying paper rolls provided with the impressions taken
from the manuscripts may pass either over guide rollers to the reels to w
upon which they are wound, as shown in Figure 1, or to a severing device, not
shown in the drawing, which is designed to cut the copying paper into single
sheets. The manuscript after passing the rolls 17 may be detached from the web
and caused to drop outward from the press into a suitably placed casing.
The table with the slide vis preferably attached to the frame A by a bolt a
about which it may be turned into the positions as shown in dotted lines in
Figure 1 to render the copying paper rolls accessible. To this end the covers of
the cases containing the moistened copying paper rolls a a are fixed to, or
integral with that part of the frame carrying the table and the slide r.
Suitable gearing on the axes of the reels w w and the pressure rollers / 1
meshing with one another are provided to secure a regular and positive motion
of the operating parts.
The herein described copying press is particularly adapted for the employ-

page_text: ment of copying paper rolls impregnated or moistened in accordance with my
invention described in the Specification of Application No. 6579 1899. As the
moistened paper rolls are enclosed by the cases they are at any time ready
for use, since the moisture is maintained within the paper rolls owing to their
being more or less tightly wound up, as well as to their enclosure within the
cases kk.
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 a copying press, the combination with a pair of revolving pressure rolls,
of two rolls of moistened tissue paper so arranged relatively to said pressure
rolls that the latter will hold the tissues in a position to admit of the placing
of the matter to be copied between them, for the purpose set forth.
2. In a copying press, the combination with a pair of revoluble pressure rolls,
of two rolls of moistened tissue paper so arranged relatively to said pressure
rolls that the latter will hold the tissues in a position to admit of the placing
of the matter to be copied between them, and means for guiding the tissues to
different points after passing from between said pressure rolls, for the purpose
set forth.
3. In a copying press, the combination with a pair of revoluble pressure rolls,
of two rolls of moistened tissue paper arranged relatively to said pressure rolls
so that the latter will hold the tissues in a position to admit of the placing of
the matter to be copied between them, and means for separately reeling said
tissues, for the purpose set forth.
4. In a copying press, the combination with a pair of revoluble pressure rolls,
of two rolls of moistened tissue paper, and enclosing casing for each of said rolls
having passages for the webs of tissue so at ranged relatively to the pressure rolls
that the latter will hold the two tissues in a position to admit of the placing of the
matter to be copied between them for the purpose set forth.
5. In a copying press, the combination with a pair of revoluble pressure rolls,
and two revoluble rolls of moistened tissue paper arranged relatively to said
pressure rolls so that the latter will hold the two tissues in a position to admit
of the placing of the matter to be copied between them; of a feed table for feed-
ing said matter to the nip of the pressure rolls between said tissues, for the pur-
pose set forth.
6. In a copying press, the combination with a pair of revoluble pressure rolls
and two rolls of moistened tissue paper revoluble in bearings above one of said
pressure rolls and in front of the other respectively, so that the two tissues will
be guided over a portion of the periphery of their respective rolls to the nip
thereof, and a feed table arranged to guide the matter to be copied to the nip
of the pressure rolls between the two tissues, for the purpose set forth.
7. In a copying press, the combination with a pair of revoluble pressure rolls,
and two revoluble rolls of moistened tissue paper arranged near, and relatively
to said pressure rolls so that the latter will hold the two tissues in a position to
admit of the placing of the matter to be copied between them; of a feed table
for feeding the matter to be copied to the nip of the pressure rolls between
said tissues and means for tilting said table away from the pressure and tissue
rolls, for the purpose set forth.
8. In a copying press, the combination with the lower roll of a pair of super-
posed pressure rolls, and a pair of two-armed levers in the shorter arms of which
said lower pressure roll is jourualled, of a pair of weighted levers having bearing
on the free ends of the aforesaid two-armed levers, for the purpose set forth.
9. In a copring press, the combination with the lower roll of a pair of super-
posed pressure rolls and a pair of two-armed levers, in the shorter arms of which
said lower roll is journalled; of a pair of two-armed weighted levers, and a screw

page_text: adjustable in the shorter arms of said weighted levers, said screws having bearing
on the free end of the longer arms of the pressure roll supporting levers, for
the purpose set forth.
10. In a copying press, the combination with the lower roll of a pair of super-
posed pressure rolls and a pair of two-armed levers, in the shorter arms of which
said lower roll is journalled; of a pair of two-armed weighted levers, and a screw
adjustable in the shorter arms of said weighted levers, said screws having bear-
ing in the free end of the longer arms of the pressure roll supporting levers,
and means for relieving the latter of the pressure exerted thereon by the weighted
levers, for the purpose set forth.
11. The combination with the framing of a copying press, a pair of pressue
rolls revoluble in bearings in said framing, two reels for moistened tissue paper
likewise revoluble in bearings in the framing above one of the pressure rolls and
in front of the other, respectively, and a portion of an enclosing casing for each
of said reels secured to the framing; of a feed table constructed to guide the
matter to be copied to the nip of the pressure rolls, and the complementary
portions of the casings for the reels secured to said feed table, and means for
tilting said table away from the pressure rolls and reels, for the purposes set forth.
Dated this 20th day of December 1899.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.