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A spiral bound notebook. Coil binding, also known as spiral binding, is a commonly used book binding style for documents. This binding style is known by a number of names (some trademarked) including spiral coil, color coil, colorcoil, ez-coil, plastic coil, spiral binding, and coilbind.
Spiral coil binding uses a number of different hole patterns for binding documents. The most common hole pattern used is 4:1 pitch (4 holes per inch). However, spiral coil spines are also available for use with 3:1 pitch, 5:1 pitch and 0.400-hole patterns.
This is due to the fact, that non-circular coils are being mounted on a sheet metal package or in a circular arrangement. The coils should be rather small, in order to avoid a contact with the neighboring coil or the sheet metal package. For orthocyclic round coils three winding geometries can be defined: a) Equal number of turns per layer
With this binding method, users insert their punched pages onto a C-shaped spine, and then use a wire closer to squeeze the spine until it is round. [1] Documents that are bound with wire binding will open completely flat on a desk, and allow for 360 degree rotation of bound pages, without the side protrusion produced by spiral binding.
An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil (spiral or helix). [ 1 ] [ 2 ] Electromagnetic coils are used in electrical engineering , in applications where electric currents interact with magnetic fields , in devices such as electric motors , generators , inductors , electromagnets , transformers ...
A coiled tubing unit (CTU) is a self-contained multi-use machine that can do almost anything that a conventional service rig does - with the exception of tripping jointed pipe. There are generally two types in shallow service - Arch and Picker. One uses a vertical elevator with a horsehead on top, and an injector hanging by winch line off it.
A bifilar coil is an electromagnetic coil that contains two closely spaced, parallel windings. In electrical engineering , the word bifilar describes wire which is made of two filaments or strands.
In increasing order of response range and cost, the types are: [1] [2] Pocket springs. Continuous coils (the Leggett & Platt brand name is "Mira-coil") is an innerspring configuration in which the rows of coils are formed from a single piece of wire. They work in a hinging effect similar to that of offset coils. Bonnell coils are the oldest and ...