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Since the invention of the steel can, produced as we know it today, technology, materials, and production have wandered far beyond the imagination of our predecessors. Todays economics and competitive attitude has forced producers into maintaining low cost but safe containers. Steel containers have advanced from bulky tin plates and soldered seams to lighter, stronger containers with a multitude of varieties that will meet todays competitive markets.

Materials used today range from paper to plastics to aluminum and of course steel. The combination of materials used today to form a can with a cover, is endless.

Therefore, we intend to provide basic knowledge and skills to recognize a safe, secure and properly formed double seam on a can regardless of the materials used. We will look at the many tools available for double seam inspection and methods used in breaking down the seam to insure that the quality and integnity of the seam remains within specifications outlined by can manufacturers.

This web-site is separated into several sections starting with the Terminology, Tools, Seaming Chucks, Seaming Rolls, 1st Operation Seaming Roll Profile, 2nd Operation Seaming Roll Profile, Visual Double Seam Defects, Cross Section Double Seam Defects and finally Double Seam Component Defects.

This seam data is offered in good faith as typical reference and not as specification or requirements. The information contained herein is based on available data at the time of its release. There is no warranty, expressed or implied, regarding the accuracy of this data, or the results to be obtained from the use thereof.  CMC-KUHNKE assumes no responsibility for damage from the use of the information inscribed within.

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