Current compressed air dryer types include the following products: 1  Refrigerant type: Cycling. 2  Regenerative desiccant type: Heatless (no internal or external heaters) Heated (internal or external heaters) Heat of Compression. 3  Single Tower Deliquescent. 4  Membrane.
History. Canadian Marcellus Gilmore Edson (February 7, 1849 â March 6, 1940) of Montreal, Quebec was the first to patent peanut butter, in 1884. Peanut flour already existed. His cooled product had a consistency like that of butter, lard, or ointment according to his patent application.
Early peanut-butter-making machines were developed by Joseph Lambert, who had worked at John Harvey Kellogg's Battle Creek Sanitarium, and Ambrose Straub. January 24 is National Peanut Butter Day in the United States.