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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 .
The tape punch, rather than punching out the usual round holes, would instead punch little U-shaped cuts in the paper, so that no chad would be produced; the "hole" was still filled with a little paper trap-door. By not fully punching out the hole, the printing on the paper remained intact and legible.
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.
Usually, the punch and die are close to the same dimensions, creating a sheared edge when they meet. A punch that is significantly smaller than the die can be used to produce an extruded hole where the punch displaces the punched material to the sides, forming a tube perpendicular to the punched sheet. [2] [3]
(The hole thus punched for a discbound loose leaf system is called “香菇孔” (“mushroom hole”) by KW·TriO.) A loose leaf system typically contains specially designed hole punches that can be used to punch holes on any common, standard-size paper so that they can be arranged into the loose leaf system. These hole punches are sold by ...
It was oriented in a vertical plane. [2] 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]
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