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In 1843, Nancy M. (Donaldson) Johnson of Philadelphia received the first U.S. patent for a small-scale hand-cranked ice cream freezer. [3] The ice cream freezer was a pewter cylinder. [4] Dubbed the "Queen of Ices", Victorian English culinary entrepreneur Agnes Marshall was granted a patent for an ice cream machine that could freeze a pint of ...
Ice cream was originally made using very intensive labor and it often took one individual hours to make. Johnson had invented the hand cranked ice cream churn as a way to make ice cream faster and easier than by hand. [4] The patent number for the Artificial Freezer is US3254A. [5] It was patented on September 9, 1843, and antedated on July 29 ...
White Mountain Products is a brand of ice cream makers in the Sunbeam products division. It is a subsidiary of Newell Brands. Thomas Sands started White Mountain Freezer Company in Laconia, New Hampshire, in 1872. In 1881 their factory was destroyed by fire.
Cryogenic IQF freezers immerse the product in liquid nitrogen at very low temperatures, freezing it rapidly while continuously moving the product to avoid block or lump formation. [5] Although this method shows good freezing results, it might lead to higher processing costs per weight of product due to the cost of the liquid nitrogen required.
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In practical situations, when an air coil freeze stat is not used, bypassed, or defeated, the air coil can freeze, and this causes a lack of air flow to the facility. [3] By contrast, when a water coil freeze stat is not used, the water coil can get so cold that it can freeze the cooling liquid in the exchanger and burst the exchanger. [ 5 ]
His 1856 patent was for a vapour-compression system using ether, alcohol, or ammonia. He built a mechanical ice-making machine in 1851 on the banks of the Barwon River at Rocky Point in Geelong, Victoria, and his first commercial ice-making machine followed in 1854. Harrison also introduced commercial vapour-compression refrigeration to ...
Ice cream was made by hand in a large bowl placed inside a tub filled with ice and salt. This is called the pot-freezer method. [56] French confectioners refined the pot-freezer method, making ice cream in a sorbetière (a covered pail with a handle attached to the lid). In the pot-freezer method, the temperature of the ingredients is reduced ...
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