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  2. Wheatstone system - Wikipedia

    en.wikipedia.org/wiki/Wheatstone_system

    The paper punches were labelled with numbers: 1 for the top hole of the dot, 2 for the sprocket hole for dot, and 3 for the bottom hole for dot. When a dash was punched, extra hole punches to the right punched a centre hole with number 4 and a bottom hole with number 5. [2] The perforator was introduced in 1867. [6]

  3. Hole punch - Wikipedia

    en.wikipedia.org/wiki/Hole_punch

    A hole punch, also known as hole puncher, or paper puncher, is an office tool that is used to create holes in sheets of paper, often for the purpose of collecting the sheets in a binder or folder (such collected sheets are called loose leaves). A hole punch can also refer to similar tools for other materials, such as leather, cloth, or sheets ...

  4. Punching machine - Wikipedia

    en.wikipedia.org/wiki/Punching_Machine

    A punching machine is a machine tool for punching and embossing flat sheet-materials to produce form-features needed as mechanical element and/or to extend static stability of a sheet section. According to the file, Richard Walsh, the county of Grayson, and the State of Texas had invented and applied for US patent in 1894.

  5. Swingline - Wikipedia

    en.wikipedia.org/wiki/Swingline

    Swingline is a division of ACCO Brands Corporation that specializes in manufacturing staplers and hole punches. From its foundation in 1925, the company was located in Long Island City, Queens, New York, United States, until the plant was moved to Nogales, Mexico, in 1999. [1]

  6. Paper drilling - Wikipedia

    en.wikipedia.org/wiki/Paper_drilling

    Paper drill bits are available for different hole sizes and in different coating qualities. Unlike hole punching, where only one or a few sheets may be processed, a large number of sheets can be processed with a paper-drilling machine. Depending on the type of paper drill, either the paper drill bits are lowered into the pile or the table is ...

  7. Punching - Wikipedia

    en.wikipedia.org/wiki/Punching

    Punching is a forming process that uses a punch press to force a tool, called a punch, through the workpiece to create a hole via shearing. Punching is applicable to a wide variety of materials that come in sheet form, including sheet metal , paper , vulcanized fibre and some forms of plastic sheet.