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2. Hole punch - Wikipedia

   en.wikipedia.org/wiki/Hole_punch

   Some 2-hole punches have an "888" marking on their paper guide, to assist punching all four holes into A4 paper. [ 5 ] Konica Minolta specifies that for European 4-hole arrangements, all holes should be 11 ± 1 mm from the nearest (i.e. long/spine) edge of the paper, [ 6 ] which is slightly at variance with ISO 838's specification of 12 ± 1 mm .

3. 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 ...

4. 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]

5. 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.

6. Comb binding - Wikipedia

   en.wikipedia.org/wiki/Comb_binding

   To bind a document, the user first punches holes in the paper with a specialized hole punch. Pages must be punched a few at a time with most of these machines. If hard covers are desired, they must be punched as well. In bulk applications, a paper drilling machine may be used. Then the user chooses a spine size that will match the document.

7. Punching - Wikipedia

   en.wikipedia.org/wiki/Punching

   Die and punch shapes affect the force during the punching process. The punch force increases during the process as the entire thickness of the material is sheared at once. A beveled punch helps in the shearing of thicker materials by reducing the force at the beginning of the stroke. However, beveling a punch will distort the shape because of ...