Method of forming a flush-sided container
Patent 4270475 Issued on June 2, 1981. Estimated Expiration Date: 
July 19, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 19, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2343550 2641827 2643627 2849148 InventorsAssigneeApplicationNo. 06/058747 filed on 07/19/1979US Classes:413/8, Forming or treating metallic closure220/619Joint bent or rolled outwardlyExaminersPrimary: Goldberg, Howard N.Attorney, Agent or FirmInternational ClassesB21D 51/26 (20060101)B21D 51/30 (20060101) B21D 51/32 (20060101) AbstractA system of seaming a metallic end cover to a tubular composite can body utilizing a cover the diametric size of which is smaller than that of the can body. The smaller cover provides an annular space between the central depending cover pin and the surrounding portion of the body wall at the end thereof. The peripheral flange of the cover is inwardly folded about and with the flanged end of the can body to define a double seam. Simultaneously with the formation of the double seam, the seaming rolls, through direct engagement with the can body at and immediately below the seam, inwardly shape and contour the end portion of the can body, bringing the formed seam into the annular space and into direct engagement with the cover pin, necking the can body and providing a flush-sided container. | |
