Improvements relating to Paper adapted for Taking Press Copies of Letters and other Documents.
Year: 1897

page_text: Date of Application, 30th July, 1897
Complete Specification Left, 6th Apr., 1898-Accepted, 30th July, 1898
Improvements relating to Paper adapted for Taking Press Copies
of Letters and other Documents.
I, JULES FRYDMANE, of 101, Boulevard Sebastopol, Paris, in the Republic of
France, Engineer, do hereby declare the nature of this invention to be as follows:-
―
The paper heretofore employed for copying letters in letter presses has been
exclusively a very thin tissue paper, of strong blotting action offering no resist-
ance and capable only of supplying a very limited number of more or less clear
reproductions according to the dexterity of the operator.
In accordance with my invention I apply as a substitute for tissue paper for
press-copying purposes (especially in connection with the use of my automatic
controlling and reproducing apparatus described in the Specifications of former
Patents Nos. 51185 & 17296) the sulphuretted or vegetable parchment paper;
the main and characteristic qualities of which are: resistance and imperviousness.
This paper is the ordinary commercial parchment paper and forms no part of the
present invention.
The copy produced on sulphuretted or parchment paper differs materially from
a copy produced on tissue paper as regards the moistening operation as well as
the number and clearness of reproductions, obtainable,
Whereas tissue paper requires to be so moistened that the water completely
soaked the paper and to be subsequently subjected to a kind of wiping process
with applied pressure; the sulphuretted paper, prepared in accordance with my
process is moistened only upon one side. The document to be copied is not applied
to the moist surface but to the dry and impermeable side.
The use of communicative inks and colours thus permits of effecting by pressure
a slight deposit upon the non-moistened surface; the moisture acts, but in a
very indirect manner; the result being that a large number of copies can be taken
from one and the same original and without the latter being thereby damaged.
The copies thus obtained present an incomparable clearness regularity and
moreover are permanent.
I may add that these results are obtained by copying with the aid of my
apparatus.
In order to fix the communicative ink or colour upon the sulphuretted paper
and to render the copy permanent, the paper is immediately after its manufacture,
subjected to the following treatment.
I place the sulphuretted paper into the following bath heated to 70 degrees
Centigrade.

page_text: diluted with water; and the mixture or solution produced subsequently poured
into the glycerine and water baths, care being taken to agitate the whole mass to
effect a very intimate mixture.
This bath is of sufficient strength to prepare 2000 kilogrammes of paper.
The above composition of ingredients is of course only given by way of example
and the proportion of the ingredients employed may vary within more or less
extensive limits.
Improvements relating to Paper adapted for Taking Press Copies
of Letters and other Documents.
I, JULES FRYDMANE, of 101, Boulevard Sebastopol, Paris, in the Republic of
France, Engineer, 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: —
The paper heretofore employed for copying letters in letter presses has been
exclusively a very thin tissue paper, of strong blotting action; offering no resist-
ance and capable only of supplying a very limited number of more or less clear
reproductions according to the dexterity of the operator.
In accordance with my invention I apply as a substitute for tissue paper for
press-copying purposes especially in connection with the use of my automatic
controlling and reproducing apparatus described in the Specification of former
Patents Nos. 511895 and 172969 the sulphuretted or vegetable parchment paper,
the main and characteristic qualities of which are; resistance and imperviousness.
This paper is the ordinary commercial parchment paper and forms no part of the
present invention.
The copy produced on sulphuretted or parchment paper differs materially from
a copy produced on tissue paper as regards the moistening operation as well as
the number and clearness of reproductions, obtainable,
Whereas tissue paper requires to be so moistened that the water completely
soakes through the paper and to be subsequently subjected to a kind of wiping process
with applied pressure: the sulphuretted paper, prepared in accordance with my
process is moistened only upon one side. The document to be copied is not applied
to the moist surface but to the dry and impermeable side.
The use of communicative inks and colours thus permits of effecting by pressure
a slight deposit upon the non-moistened surface; the moisture acts, but in a
very indirect manner; the result being that a large number of copies can be taken
from one and the same original and without the latter being thereby damaged.
The copies thus obtained present an incomparable clearness, regularity and
moreover are permanent.
I may add that these results are obtained by copying with the aid of my
apparatus.
In order to fix the communicative ink or colour upon the sulphuretted paper
and to render the copy permanent, the paper is immediately after its manufacture,
subjected to the following treatment.

page_text: Alcohol
5 litres.
This treatment must take place quickly. The tannin is first dissolved in alcohol,
diluted with water; and the mixture or solution produced is subsequently poured
into the glycerine and water bath, care being taken to agitate the whole mass to
effect a very intimate mixture.
This bath is of sufficient strength to prepare 2000 kilogrammes of paper.
The paper to be treated is unwound from a large roll or reel and is passed
quickly through a tank containing the solution. To this end a roll is placed on
the bottom of the tank and the paper is passed underneath the same.
The time occupied in passing the paper through the solution should be from 8
to 10 minutes for every 100 meters of paper.
Care must be taken not to bring the paper into contact with iron as this will
cause it to blacken. The tank is made of zinc, or wood, and the roller is of rubber
or wood.
The above composition of ingredients is of course only given by way of example,
and the proportions of the ingredients employed may be varied within more or less
extensive limits.
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:-
11
1. The use of an improved sulphuretted or vegetable parchment paper for pur-
poses of press-copying and of producing multiple reproductions from an original,
written or printed by means of communicative ink or colour.
2. The process of preparing or treating the said sulphuretted or vegetable parch-
ment paper by means of a bath composed, for example, of;
1000 litres
-
of water
150 kilogrammes
4 kilogrammes
and
5 litres
glycerine
decolourized tannin
"
"
alcohol.
"
the said substances being combined as above described, with the object of fixing
HASELTINE, LAKE & Co.,
45, Scuthampton Buildings, London, W.C..
Agents for the Applicant.