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2. Hemming and seaming - Wikipedia

   en.wikipedia.org/wiki/Hemming_and_seaming

   hemming process A closed hem A seam. Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. Hemming is the process in which the edge is rolled flush to itself, while a seam joins the edges of two materials.

3. Roof seamer - Wikipedia

   en.wikipedia.org/wiki/Roof_seamer

   A hammer and small anvil were tools that were used for hemming and seaming roof panels together at the edge where they meet with the next roof panel in sequence. In 1976, a German immigrant and inventor, Ewald Stellrecht, [1] helped develop an early version of a metal roof panel portable roll forming machine in Exton, PA. From this a version of ...

4. Flashing (weatherproofing) - Wikipedia

   en.wikipedia.org/wiki/Flashing_(weatherproofing)

   Shaped like a “U” or channel to catch water (e.g., where the edge of a tile roof meets a wall). Through wall flashing Spans the thickness of the wall and directs water to weep holes. Cap flashing (drip cap) Often used above windows and doors. Drip edge A metal used at the edges of a roof. Step flashing (soaker, base flashing)

5. Dolly (tool) - Wikipedia

   en.wikipedia.org/wiki/Dolly_(tool)

   Typically a dolly is a solid piece of metal, small enough to hold in one hand, with a curved or shaped face. Generally a dolly will have more than one surface, each with its own radius of curvature (much like a three-dimensional French curve ), allowing the craftsman more flexibility in using the tool.

6. Automotive hemming - Wikipedia

   en.wikipedia.org/wiki/Automotive_Hemming

   Hemming presses are widely used in automotive manufacturing for the hemming of sheet-metal body components. The process uses traditional hydraulically operated ‘stamping presses’ to hem closure parts, and, being the last forming process in stamping, it largely determines the external quality of such automotive parts as doors, hoods, and trunk lids.

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