Tubular or cylindrical baking pan with rounded ends; made in two long halves that lock together. Each half has a continuous, horizontal flange with folded rim, that on the top with a pivoting latch riveted at front center and two slots cut along the back, while that on the bottom has two tabs riveted along its back. The bottom tabs fit into the top slots, and the top latch fits under the bottom flange to lock the pan shut. Both halves are identically stamped at back center (the top rightside-up and the bottom upside-down) "(flourish) IDEAL (flourish) / (flourish) PAT. APL'D. FOR. (flourish)", in incuse sans serif letters.
George W. Knapp of Baltimore, MD, designed this pan to evenly bake loaves of bread or cake. He received U.S. Patent No. 27,486 on August 3, 1897.
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