Year: 1886

page_text: I, GEORGE FREDERICK REDFERN, of the General Patent Office, No. 4, South
Street, Finsbury, in the county of Middlesex, Patent Agent do hereby declare the
nature of this invention (a communication from abroad by Lars Johan Ekrisson of
Upsala, in the kingdom of Sweden, Bachelor of Arts, and Edward Ernst Rupert
Nordling, also of Upsala aforesaid, Agriculturist) to be as follows:-
This invention relates to the production of dry rennet and process therefor.
According to this invention dry rennet consisting of a rennet ferment is extracted
from rennet bags by the use of a mixture of water and muriatic acid and then
neutralized, a suitable purified glutinous substance being added to the rennet and
also a small quantity of glycerine, the rennet being then dried.
The process for producing the dry rennet extract consists in extracting the
rennet from the rennet bags (preferably calf) by means of a mixture of water and
a small proportion of muriatic acid after which, if necessary, the extract is
filtered and then neutralized a suitable quantity of glutinous matter being then
dissolved therein and a small quantity of glycerine added to it and then dried.
I propose to call the product "Sicco-coaguline."

page_text: The Manufacture of Dry Rennet and Process therefor.
I, GEORGE FREDERICK REDFERN of the General Patent Office, No. 4 South
Street, Finsbury, in the County of Middlesex, Patent Agent, do hereby declare the
nature of this invention (a communication from abroad by Lars Johan Eriksson of
Upsala, in the Kingdom of Sweden, Bachelor of Arts, and Edward Ernst Rupert
Nordling, also of Upsala aforesaid, Agriculturist) and in what manner the same is
to be performed to be particularly described and ascertained in and by the following
statement :-
This invention relates to the production of dry rennet and process therefor.
According to this invention dry rennet consisting of a rennet ferment is extracted
from rennet bags by the use of a mixture of water and muriatic acid and then
neutralized, a suitable purified gelatinous substance being added to the rennet and
also a small quantity of glycerine, the rennet being then dried.
The process for producing the dry rennet extract consists in extracting the
rennet from the rennet bags (preferably calf) by treating them with a mixture of
water and a small proportion say about 0,3 to 0,4 (3 to 4 per mille) of muriatic
acid at a temperature not exceeding forty degrees Celsius for from six to forty eight
hours, the time depending upon the temperature of the mixture and the quality of
the rennet bags, after which, if necessary, the extract is filtered or otherwise
freed from the mucous constituents of the rennet bags and then neutralized by
means of soda lye.
By mixing several extracts and, if necessary, by diluting the same, a rennet
extract is produced of constant strength, which can be tested by ascertaining if a
certain quantity thereof will cause a certain quantity of milk which has been
found by testing with litmus to contain acid as well as alkali to curdle at a certain
temperature within a given time. In the extract obtained in this manner a
suitable quantity of gelatinous matter (say about 25 grammes to each litre of the
extract) is then dissolved at a temperature not exceeding 40 degrees Celsius, after
which the solution is poured, so that it may become dry, upon a flat slab of glass,
porcelain, slate or the like. In order that the product, although dry, shall remain
soft and not become brittle or crumble or break a small quantity of glycerine is
added to the gelatinous matter or solution before it is poured upon the slab.
I propose to call the product "Sicco-coaguline."
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. The manufacture of dry rennet, consisting of a rennet-ferment from rennet
bags by the use of a mixture of water and muriatic acid, the rennet being then
neutralized and a suitable purified gelatinous substance and also a small quantity
of glycerine being added thereto, the renuet being then dried.

page_text: 2. The herein described process for producing dry rennet extract consisting in
extracting the rennet from the rennet bags by means of a mixture of water and
a small proportion of muriatic acid after which if necessary the extract is filtered
and then neutralized, a suitable quantity of gelatinous matter being then dissolved
therein and a small quantity of glycerine added to it and then dried. 1
Dated the 23rd day of Novembar 1006