Fuller (weapon)

Fuller (weapon)

, rather than to allow blood to flow from a stabbed person. Many blades use fullers even when they are so short that the physical effect is negligible; in this case, the purpose may be to make the weapon resemble larger blades.

The blood-groove (which is often incorrectly called a fuller) is similar in appearance but is very different in function. Rather than creating a groove, a hole is cut out nearly the entire length of the blade. (The fact that it is referred to as a blood-"groove" likely causes the incorrect assumption that the two designs are synonymous.) Theoretically this design feature makes a weapon easier to withdraw after a stabbing attack by allowing air into the wound it produces, but no evidence has demonstrated any resisting suction effect. It is important to note that this also weakens the spine of the blade.

Physics

s. Some even contend that this concept was borrowed into architecture from weapons design [http://www.agrussell.com/knife_information/knife_encyclopedia/articles/blood_groove.html] .

Japanese blades

In Japanese bladesmithing, fullers have a rich tradition and terminology, enough that there are separate terminologies for the top (hi, usually pronounced as bi when used as a successive word) and bottom (tome) ends of the feature. A listing follows:

*Hi
**Bo-bi: A continuous straight groove of notable width, known as katana-bi on tanto. With "soe-bi", a secondary narrow groove follows the inner straight length of the main one. With "tsure-bi", the secondary is similar but continues beyond the straight length.
**Futasuji-bi: Two parallel grooves.
**Shobu-bi: A groove shaped like the leaf of an iris plant.
**Naginata-bi: A miniature "bo-bi" whose top is oriented opposite from the blade's, and usually accompanied by a "soe-bi". Seen primarily on naginatas.
**Kuichigai-bi: Two thin grooves that run the top half of the blade; the bottom half is denoted by the outer groove stopping halfway while the inner one expands to fill the width.
**Koshi-bi: A short rounded-top groove found near the bottom of a blade, near to the tang.
*Tome
**Kaki-toshi: The groove runs all the way down to the end of the tang.
**Kaki-nagashi: The groove tapers to a pointed end halfway down the tang.
**Kaku-dome: The groove stops as a square end within 3 cm of the tang's upper end.
**Maru-dome: Similar to the kaku, except with a rounded-end.

The kukri

The Nepali kukri has a terminology of its own, including the "aunlo bal" (finger of strength/force/energy), a relatively deep and narrow fuller near the spine of the blade, which runs (at most) between the handle and the corner of the blade, and the "chirra", which may refer either to shallow fullers in the belly of the blade or a hollow grind of the edge, and of which two or three may be used on each side of the blade [http://www.himalayan-imports.com/faq/Construction.html] .

References

* [http://www.agrussell.com/knife_information/knife_encyclopedia/articles/blood_groove.html "Blood groove", from the A. G. Russell knife encyclopedia]
* [http://www.himalayan-imports.com/faq/Construction.html Terminology of the Kukri]


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