An Improved Process of Preserving Milk and Cream.
Year: 1890

page_text: Date of Application, 3rd May, 1890
Complete Specification Left, 219h Jan., 1891-Accepted, 21st Mar., 1891
PROVISIONAL SPECIFICATION.
An Improved Process of Preserving Milk and Cream.
I, WILLIAM JAMES CLARKE, of 23, High Street, Kensington, in the County of
Middlesex, Dairyman, do hereby declare the nature of this invention to be as
follows:-
My invention relates to an improved process of preserving milk and cream in a
sweet and palatable condition equal to that of the fresh article without the use of
any antiseptic, the admixture of which with the milk or cream is objectionable upon
hygienic and other grounds.
In carrying my improved process into effect, I first scald the milk or cream in a
water bath until it acquires a temperature of about 160°, care being taken to slowly
agitate it during the scalding operation. This is essential in order to prevent
deterioration of the flavour and to assist the ultimate preservation of the milk or
cream. The scalded milk or cream is then to be at once transferred to vessels
which have been first heated to the scalding temperature, and are to be completely
filled and tightly stoppered so as to exclude the air. The milk or cream having
been allowed to cool in these vessels for about twenty-four hours, the scalding
operation is to be repeated at the same temperature and in the same way as before
and the milk or cream is then again sealed up in suitable vessels preferably of
earthenware or glass in which it may be kept for several weeks without liability of
turning sour.
Dated this 3rd day of May 1890.
W. J. CLARKE,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
An Improved Process of Preserving Milk and Cream.
I, WILLIAM JAMES CLARKE, of 23, High Street, Kensington, in the County of
Middlesex, Dairyman, 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 an improved process of preserving milk and cream in a
sweet and palatable condition, equal to that of the fresh article, without the use of
any antiseptic, the admixture of which with the milk or cream is objectionable upon
hygienic and other grounds.
In carrying my improved process into effect, 1 first scald the milk or cream by
placing it at the normal temperature in an open vessel and then immersing the
vessel in a hot-water bath so as to gradually raise the milk or cream to a tempera-
ture of about 160° Fahrenheit, care being taken to slowly agitate it during the
scalding operation, this being essential in order to prevent deterioration of the Havor
and to assist the ultimate preservation of the milk or cream.
The scalded milk or cream, having acquired the above mentioned temperature, is
then to be at once transferred to vessels which have been first heated to the scalding
temperature of 160° and which are to be completely filled and tightly stoppered so
as to exclude the air.
The milk or cream having been allowed to cool in these vessels for about twenty-
four hours, the scalding operation is to be repeated by again transferring the milk
to the water-bath and heating it to the same temperature and agitating as before,
DI

page_text: after which the milk or cream is to be again transferred to suitable vessels,
profurably of earthenware or glass, previously heated to scalding temperature in
order to destroy any germs they may contain and which are to be sealed up air-
tight and wherein the milk or cream may be kept for several weeks without
liability of turning sour.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The herein described process of preserving milk and cream by scalding, letting
cool in closed vessels, again scalding, and finally sealing up in closed vessels
substantially as herein specified.
Dated this 29th day or January 1891.
W. J. CLARKE.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.