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A punch (left) and the respective matrix produced from it (right). The small letters at the base of the matrix are founders marks. Punchcutting is a craft used in traditional typography to cut letter punches in steel as the first stage of making metal type. [1]
When a specially shaped punch is used to create multiple usable parts from a sheet of material (i.e. the punched-out piece is the good piece), the process is known as blanking. In metal forging applications the work is often punched while hot, and this is called hot punching. Slugging is a type of metal-punching operation in which the action of ...
A "matting" tool has a pattern cut into the tip, and is used (mainly in chasing) to create textured areas. A "hollow-faced" punch has a raised contour (circular, or with some other shape) with a hollowed-out middle, and is used to stamp that contour, usually on the front face. A lightweight "chasing hammer", to drive the punches.
Tin panels today are made in 24-by-24-inch (610 mm × 610 mm) and 24-by-48-inch (610 mm × 1,220 mm) sizes for easier handling and one-person installation. Today, most tin ceiling manufacturers actually use recycled blackplate steel in a thickness of only 0.010 inches (0.25 mm). There are some manufacturers who also use actual tin plated steel ...
Flintknapping a stone tool. Knapping is the shaping of flint, chert, obsidian, or other conchoidal fracturing stone through the process of lithic reduction to manufacture stone tools, strikers for flintlock firearms, or to produce flat-faced stones for building or facing walls, and flushwork decoration.
Misc. stencil, tin punch, ceramics —First — Anita Quisenberg —Second — Carol Wright. Painting drawing watercolor oils and pastels —Brenda Heffner. Photography — color or black and white
East Group C. 1. Chicago Bulls (2-1) Remaining schedule: vs. Celtics. Hold head-to-head tiebreaker over Hawks +15 point differential (one point ahead of Boston)
The Wheatstone perforator was a development of Alexander Bain's 1848 manually operated hole punch machine for his "fast telegraph". [5] It produced Wheatstone slips using three buttons (or keys) labelled "A", "A1" and "A2". "A" punched the pattern for dot, "A1" punched the pattern for space, and "A2" punched the dash pattern in two columns.
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