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Three ring binder sprung clip mechanism. Japan uses a unique system, referred to as J-Binder. This system is compatible with A4 and B5 paper with different products. The A4 version uses 30 closely spaced rings, while the B5 one uses 26. Less common variants such as a 20 ring A5 version also exist. [6] Personal organizer with metallic ring binder
Chain or Zipper Teeth (the continuous piece that is formed when both halves of a zipper are meshed together) and Chain Width (refers to the specific gauge of the chain – common gauge sizes are #3, #5, #7, #8 and #10, the bigger the number, the wider the teeth/chain width is)
The 5 ⁄ 16 value is most commonly used, as it allows for looser tolerances in both ring binder and paper punching. The distance to the paper edge also varies, with 1 ⁄ 2 inch (13 mm) hole-center-to-edge being typical. Konica-Minolta specifies 9.5 ± 1 mm [6] for both two and three-hole variants in North America.
There are several sizes of binder clips, ranging from a base size of 5 millimetres (0.2 in) to 50 mm (1.97 in). The sheet steel portion is customarily black oxide coated, but a variety of decorative painted color schemes are also available. The sheet steel portion is occasionally made of stainless steel, the more typical spring steel can also ...
Standard sizes are 4.8 mm (3 ⁄ 16 in) (for 16 sheets of 20# paper) up to 51 mm (2 in) (for 425 sheets). Spine lengths are generally 280 mm (11 in) to match the length of letter-size paper. Spine lengths are generally 280 mm (11 in) to match the length of letter-size paper.
This type of binding uses either a 3:1 pitch hole pattern with three holes per inch or a 2:1 pitch hole pattern with two holes per inch. The three to one hole pattern is used for smaller books that are up to 9/16" in diameter while the 2:1 pattern is normally used for thicker books as the holes are slightly bigger to accommodate slightly ...