Suiter Swantz IP takes a look back at past inventions and inventors with our Patent of the Day.
On this day in 1897, Charles H. Ackerman was granted U.S. Patent No. 586,538 for an ICE-CREAM FREEZER.
An excerpt from the patent states:
My invention relates to improvements in that class of ice-cream freezers known as “instantaneous” in which the cream is frozen while being forced or conveyed through a refrigerating-chamber.
The objects of my invention are, first, to render the refrigeration more effective by increasing the contact of the freezing mixture with the cream-tube; second, to provide means for thoroughly working or stirring the cream while it is being frozen; third, to provide means for feeding the cream either constantly or intermittently to the cream or freezing tube, and, fourth, to provide for intermittently feeding the freezing mixture to the ice-chamber.
The object of forming the conveyer with sectional screw-flanges is to render the movement of the cream intermittent thus giving it time to freeze and also causing it to be more thoroughly worked before reaching the outlet.
I attach great importance to the fact that the ice chamber is made to revolve about the conveyer, as the ice is thereby kept packed against the cream-chamber on all sides and the refrigeration rendered much more rapid, also to the peculiar construction of the conveyer, in that it is provided with the broken or sectional screw-flanges ad given a reciprocal longitudinal movement, as a much finer grade of cream is thus produced than by any other method.
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