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TYPES OF
COILS
Construction-wise, most
manufacturers claim to have the best coil-to-gauge ratio. However,
there are only a few innerspring manufacturers and four general
types. One thing to remember is that while there are many different
types of coils and many manufacturers, most manufacturers have
their coils made by one company, Leggett & Platt.
For information on Mattresses, please click HERE |
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BONNELL
COIL...
Ususally 390 coil
count
This heavy
12-1/2 gauge steel unit gives you the firm to extra firm feel
you're looking for. |
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Bonnell Coil Mattress
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Bonnell Offset coils
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Characteristics
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Its hour glass shape and gauge of steel gives you a more ridged
type of support.
* Its knotted coil also adds to its strength when pressure is
applied.
Worlds
best selling innerspring
An
hourglass-shaped mattress coil usually with five turns; cylindrical
at the top and bottom and tapered in the center. Mostly used in
promotional- and lower-priced bedding.
These are
the oldest ones and most commonly used. They were adapted from
buggy seat springs of the 19th century. They are still prevalent in
low priced mattresses. They have an hour-glass shape, and the ends
of the wire are knotted or wrapped around the top and bottom
circular portion of the coil (round-topped and self
tied). |
OFFSET
COIL...
Bonnell
coils evolved into Offset coils, which are currently popular, but
happen to be the most expensive ones. They are almost identical to
the Bonnell coils, except that the top and bottom circular part of
the coils have flat or straight sides, which allow for better
hinging action when they are placed together in a spring unit, and
which can be easily aligned. An evolution of the offset coils
brought the elimination of the knot that tied the end of the wire
to the coil. In other words, offset coils might be tied off or
feature a loose end (sensory arm). These are called "open end
offset coils". These improvements gave offset coils an extra
turn of working wire for greater spring action on each end of the
coil. The biggest problem with this system is
called "roll together." Because the rows of coils
generally run from side to side and the wire that holds them
together also runs side to side, over time (not always much time at
all) it will cause two people to roll towards the middle of the
mattress. |
POCKET
COIL ...
This
individually wrapped coil innerspring unit gives you a soft feel
and is 14-gauge steel. |
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Characteristics
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Each coil is encased in high-density space age fabric. This fabric
is designed to minimize friction while maximizing wear
strength.
* Each row of individually encased coils is precisely positioned by
a robotics arm, then bonded to the outer fabric. This creates a
consistent distribution of support throughout the unit. |
Pocket
coils
Also called
pocketed coils, they are individually pocketed and less frequently
used. Might not be properly tempered . Additionally, when two
people sleep on the same mattress, the individually wrapped (or
individually pocketed) coil provides motion separation (when one
person tosses and turns, the other doesn't feel it.) This is
important because when one person tosses and turns, it may not
completely wake the other person, but, it can take them out of a
deep sleep which is when the body does all of its regeneration.
When a sleeper is undisturbed at night they can fall into that deep
sleep faster, stay in a deeper sleep longer and wake up feeling
more refreshed because it allows the sleeper to get more use out of
their sleep. |
CONTINUOUS
COIL…
This system takes a coil and
runs it from head to toe creating a network of coils.
PRO: low incident of spin out
and sagging.
Continuous coil
They look like double wire
spirals or loose ringlets, creating a network of wire running
nonstop through the entire bed . The idea is that with a
continuous coil system, each coil is connected to the next so that
it can draw strength from it. This type of coil system does tend to
be the strongest, however we must remember that strength does not
dictate support.
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