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2. Hole punch - Wikipedia

   en.wikipedia.org/wiki/Hole_punch

   Three different international-standard two-hole punches. 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).

3. Artistamp - Wikipedia

   en.wikipedia.org/wiki/Artistamp

   Artistamp by Leonid Dzhepko, c. 1971. The first artist to produce an "artist’s stamp" is open to interpretation. It did not take many years after the introduction of postage stamps before UK commercial photographers saw a market in personalised stamp photographs incorporating an individual's portrait within a stamp-like printed border, printed in perforated sheets with gummed backs. [1]

4. Ticket punch - Wikipedia

   en.wikipedia.org/wiki/Ticket_punch

   A ticket punch (or control nippers) is a hand tool for permanently marking admission tickets and similar items of paper or card stock. It makes a perforation and a corresponding chad . A ticket punch resembles a hole punch , differing in that the ticket punch has a longer jaw (or "reach") and the option of having a distinctive die shape.

5. Punching - Wikipedia

   en.wikipedia.org/wiki/Punching

   The punch force required to punch a piece of sheet metal can be estimated from the following equation: [4] F = 0.7 t L ( U T S ) {\displaystyle F=0.7tL(UTS)} Where t is the sheet metal thickness, L is the total length sheared (perimeter of the shape), and UTS is the ultimate tensile strength of the material.

6. Punched tape - Wikipedia

   en.wikipedia.org/wiki/Punched_tape

   A paper tape, constructed from punched cards, in use in a Jacquard loom. The large holes on each edge are sprocket holes, used to pull the paper tape through the loom. Perforated paper tapes were first used by Basile Bouchon in 1725 to control looms. However, the paper tapes were expensive to create, fragile, and difficult to repair.

7. Punch (tool) - Wikipedia

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

   A drift "punch" is misleadingly named; it is not used as a punch in the traditional sense of the term. A drift punch, or drift pin, or lineup punch, is used as an aid in aligning bolt or rivet holes prior to inserting a fastener. A drift punch is constructed as a tapered rod, with the hammer acting on the large end of the taper.