IMPROVEMENTS IN THE MANUFACTURE OF Sugar
Year: 1877

page_text: LETTERS PATENT to John Schwartz, of Stepney, in the County of Middlesex,
for the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF Sugar."
PROVISIONAL SPECIFICATION left by the said John Schwartz at the
Office of the Commissioners of Pateuts on the 9th October 1877.
JOHN SCHWARTZ, of Stepney, in the County of Middlesex.
THE MANUFACTURE OF SUGAR."
"IMPROVEMENTS IN
The object of my Invention of improvements in the manufacture of sugar is to
treat white or crystallized sugar in such a manner as to impart a bloom or com-
plexion thereto, that will improve its appearance and quality, and thereby increase
its commercial value. This is effected by treating the white or crystallized sugar
with a solution of properly prepared syrup or with other suitable saccharine solution
of semi-uncrystallizable sugar. To this end I take white or crystallized sugar either
after it has undergone the ordinary refining process, or when it has only been
partially refined, or during the refining operation, and I pass through it a solution
of brown syrup or a solution of semi-uncrystallizable sugar. This will impart to
the crystallized sugar a rich lustrous bloom or complexion, which will greatly
improve its appearance and also its taste, and will therefore add to its commercial
value.
When the solution of brown syrup or semi-uncrystallizable sugar has been
prepared by diluting a sufficient quantity of the same in water so as to obtain the
desired colour and density, the solution must be allowed to percolate through the
mass of white or crystallized sugar which it is desired to operate upon; but I prefer
to carry on this process in a centrifugal machine, which will drive the solution
through the mass of sugar without dissolving the same, and will merely allow the
colored solution to impart the desired tint, color, bloom or complexion by coating the
crystals in an uniform manner.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Schwartz in the Great Seal Patent Office on the 26th
March 1878.
JOHN SCHWARTZ, of Stepney, in the County of Middlesex.
THE MANUFACTURE OF SUGAR."
"IMPROVEMENTS IN
The object of my Invention of "Improvements in the Manufacture of Sugar" is
to treat white or crystallized sugar in such a manner as to impart a bloom or
complexion thereto that will improve its appearance and quality, and thereby
increase its commercial value.
Before proceeding to describe my improvements, I desire to state that large
quantities of comparatively unsaleable sugar are at all times to be found on the
market, their grey colour and excessive dryness being detrimental to their sale,
for, like shot and sand, such sugars have a tendency to run through the peculiarly
shaped conical papers, usually used by the retail trade in putting up pounds and
half pounds, besides their greyness, want of bloom precludes their being bought for
grocery business.
The art of manufacturing and of refining sugar has of late made such rapid strides
that the public require a very bright looking sugar, such a sugar as will please the
eye as well as the palate. Owing to the abundance of skilled labor, to the
chemical science available, and also to cheap fuel, bright crystallized sugar can
be produced of as great purity and at a much less cost in Europe than in the West
Indies.
I now propose to operate upon perfectly pure crystals of well defined and regular
shape, regardless of their origin, and containing for the most part 99% of pure
sugar, a sugar in fact which commands such a relatively speaking high price as
almost to preclude its use by the refiner, but which unless treated by him,
would, from its excessive greyness and dryness, preclude its use by the English
grocer.
The dry crystals being placed in the centrifugal machine, I liquor them with
pure syrup of a golden hue at a density of about 24° Beaumé, when at a temperature
of 60° Fahrt, in the proportion of about 50% syrup to 100 pounds crystals, and I
thereby impart to the crystallized sugar a rich lustrous bloom or complexion which
will greatly improve its appearance and also its taste, and will therefore add to its
commercial value.
Having now set forth the nature of my Invention of improvements in the
manufacture of sugar, and explained the manner of carrying the same into effect,
I wish it to be understood that under the above in part recited Letters
Patent, I claim, subjecting sugar crystals to agitation in the presence of a golden
coloured syrup in a centrifugal machine or equivalent apparatus for the purpose
above described:
In witness whereof, I, the said John Schwartz, have hereunto set my
hand and seal, this Thirtieth day of January, in the year of our Lord One
thousand eight hundred and seventy-eight.
JOHN SCHWARTZ. (LS.)