Year: 1887

page_text: Date of Application, 13th Sept., 1887
Complete Left, 23rd May, 1888
Complete Accepted, 29th June, 1888
I JEAN PUJOS, of 1 Boulevard St. Denis, Paris, France, Genteman do hereby
declare the nature of this invention to be as follows:-
-
My invention consists in the manufacture of leather from rabbit skins whereby they
are adapted for making boots, gloves and various other articles, more particularly in
place of kid and lambskin the grain and strength of which they possess.
I manufacture the leather as follows:-
Having selected rabbit skins suitable for the purpose 1 immerse them in cold water
until thoroughly softened. 1 then open them as much as possible and put them in an
unhairing or unfurring bath composed of two parts of caustic soda and one part of
refined alum. The caustic soda dissolved hot is placed in a trough or vessel to which I
add the alum previously dissolved, agitating continually until the alumina which is
formed in contact with the soda is entirely dissolved. I leave the preparation to cool
and put the skins in this bath with sufficient water to cover them. The action is more
or less slow according to the strength of the bath. The duration of the bath will vary
from 3 to 4 days according to its strength and the temperature. I afterwards submit
the unhaired skins when washed to a milk of lime sufficiently diluted with water for
from 3 to 4 days.
After this last bath I work the skins first on the flesh side and then on the hair side
and I full them in a trough or vessel containing clear water.
I immerse the skins when drained in a vessel containing water acidulated with
oxalic acid. I keep adding this until I find by test paper that the bath remains acid.
After this bath I work the skins and full them until there is no more precipitate in
the water.
The skins thus prepared can then be either tawed or tanned according to the purpose
for which they are required.
J. C. MEWBURN,
169, Fleet Street, London,
Agent.

page_text: The Manufacture of Leather from Rabbit Skins.
I, JEAN PUJOS, of 1 Boulevard St. Denis, Paris, France, Gentleman 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, that
is to say:-
My invention consists in the manufacture of leather from rabbit skins whereby they
are adapted for making boots, gloves, and various other articles more particularly in
place of kid and lamb skin the grain and strength of which they possess.
I manufacture the leather as follows
Having selected rabbit skins suitable for the purpose I immerse them in cold water
until thoroughly softened. I then open them and put them in an unhairing or
unfurring bath composed of two parts of caustic soda and one part of refined
alum.
The caustic soda, dissolved hot, is placed in a trough or vessel to which I add the
alum previously dissolved and agitate the mixture continually until the alumina which
is formed by contact with the soda is completely dissolved.
I leave the preparation to cool and I then put the skins into this bath with sufficient
water to cover them. The action is more or less slow according to the strength of the
bath employed. The duration of the bath will vary from three to four days according
to its strength and the temperature. I then unhair and wash the skins and submit
them to the action of milk of lime sufficiently diluted with water, for from three to
four days.
After this last bath I work the skins, first on the flesh side and then on the hair side
and I then full them in a trough or vessel containing clear water. I immerse the skins
when drained in a vessel containing water acidulated with oxalic acid. I continue to
add this acid until I find, by means of test paper, that the bath remains acid.
After this acidulated bath I work the skins and full them until there is no more
precipitate in the water.
The skins thus prepared can then be either tanned or tawed in the ordinary way
according to the purpose for which they are required.
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 The manufacture of leather from rabbit skins by the treatment or process
hereinbefore described which consists :-firstly, in immersing the rabbit skins in cold
water until they are thoroughly softened; secondly, in submitting the softened skins,
for three or four days, to the action of an unhairing bath composed of two parts of
caustic soda to one part of refined aluni, and prepared in the manner hereinbefore
described; thirdly, in unhairing the skins when taken from the unhairing bath;
fourthly, in washing the unhaired skins; fifthly, in submitting the washed skins to

page_text: the action of a bath of milk of lime; sixthly, in working the skins, first on the flesh
side and then on the hair side; seventhly, in fulling the skins in a trough or vessel of
clear water; eighthly, in immersing the skins, when drained, in a bath acidulated with
oxalic acid; ninthly, in working and fulling the skins; and, finally in tanning or
tawing, in the usual way, the skins thus prepared.
Second As a new manufacture leather produced from the skins of rabbits by the
treatment or process hereinbefore described.