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  2. 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 ...

  3. Hemming and seaming - Wikipedia

    en.wikipedia.org/wiki/Hemming_and_seaming

    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.

  4. Flashing (weatherproofing) - Wikipedia

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

    In earlier days, birch bark was occasionally used as a flashing material. [7] Most flashing materials today are metal, plastic, rubber, or impregnated paper. [8]Metal flashing materials include lead, aluminium, copper, [1] stainless steel, zinc alloy, other architectural metals or a metal with a coating such as galvanized steel, lead-coated copper, anodized aluminium, terne-coated copper ...

  5. Types of press tools - Wikipedia

    en.wikipedia.org/wiki/Types_of_press_tools

    Press tools are commonly used in hydraulic, pneumatic, and mechanical presses to produce the sheet metal components in large volumes. Generally press tools are categorized by the types of operation performed using the tool, such as blanking, piercing , bending , forming , forging , trimming etc.

  6. Brake (sheet metal bending) - Wikipedia

    en.wikipedia.org/wiki/Brake_(sheet_metal_bending)

    A brake is a metalworking machine that allows the bending of sheet metal. A cornice brake only allows for simple bends and creases, while a box-and-pan brake also allows one to form box and pan shapes. It is also known as a bending machine or bending brake or in Britain as a sheet metal folder or just a folder.

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