Steam Feed Cooker and Evaporator Small 320×261 Medium 640×522 Large 1024×835 Download Tiff Original 2400×1958 | (1.0 MB) Description A slow cooker is a countertop steam cooking appliance that maintains a relatively low temperature compared to other cooking methods, for hours. This allows unattended cooking of pot roast, stew and other dishes. Keywords cooker, crock pot, evaporator, slow cooker, steam fed Galleries Food Processing Industry Source: Government Printing Office The Official Gazette of the United States Patent Office (Washington, DC: Government Printing Office, 1895)