| 摘要 |
1,111,679. Cans, drums &c. RHEEM INTERNATIONAL Inc. 29 Oct., 1965 [16 Dec., 1964], No. 45872/65. Heading B8D. In a sheet metal drum having peripheral corrugations, the ends are closed by members attached to the end walls by double-locked seams 18 and each comprising a flat annular portion 19, a step 23, and a central flat portion 26 connected to the step by a convex annular portion 27. In Fig. 3 (not shown), the step is in the form of a convex bead (44). Absolute, and comparative in terms of the outside diameter of the chime 18, dimensions are given for a practical drum embodiment. |
