Mat, more specifically a mat for lying on

Details Mat, more specifically a mat for lying on Mat, more specifically a mat for lying on

1997-01-08

1999-02-16

Trettel, Michael F.

Beds

Support for users body or part thereof

Ventilated or permitting substantial air or liquid passage

5420, 5724, 442304, 442318, A47G 906, A47C 2700

Patent

active

058707859

DESCRIPTION:

BRIEF SUMMARY
The invention concerns a mat, more specifically a mat for lying on, which for example is to be laid on top of a mattress or on a hard surface, such as a floor, with an air-permeable top layer and a bottom layer facing it, separated from each other by a middle layer with an open structure.
According to the invention, the aim is among other things to propose a mat which makes it possible to prevent overheating of those parts of the body in contact with the mat, in particular during hot weather, and more specifically in the case of bed-ridden persons and babies.
Further, the invention also aims to propose a mat which makes it possible to considerably reduce the risk of suffocation or cot death in babies.
To this end, the mat according to the invention comprises a three-dimensional knitted structure, with a middle layer essentially formed by open, relatively rigid threads, more specifically monofilaments, where said threads form part of said three-dimensional knitted structure, and where said threads, more or less evenly distributed, are placed at a certain distance from each other, such that a) said middle layer is more or less incompressible under the weight of a person lying on the top layer, and b) a permanent flow of air is possible between said middle layer and the top layer.
The top and bottom layers are purposefully parallel to each other, and at least 70% of the monofilaments in the middle layer extend more or less perpendicularly to said top and bottom layers, with the remaining portion of the monofilaments being crossed over each other and distributed over the middle layer, in order to prevent said perpendicular monofilaments from turning over or bending under the weight of a person lying on top of the mat.
In an advantageous embodiment of the invention, at least the above-mentioned top layer consists of a knitted structure with meshes having a cross-section of 0.5 mm to 10 mm, and preferably a cross-section of between 2 and 4 mm.
Other features and advantages of the invention will be apparent from the following description of some specific embodiments of a mat for lying on according to the invention; this description is given by way of example and in no way limits the scope of the protection afforded. The reference numbers used below relate to the accompanying drawings.
FIG. 1 is a schematic perspective view of part of a mat for lying on according to a first embodiment of the invention.
FIG. 2 represents a schematic cross-section of part of a mat for lying on according to a second embodiment of the invention.
FIG. 3, on a greater scale, is a schematic perspective view of part of a mat for lying on according to a third embodiment of the invention.
FIG. 4, on an even greater scale, is a schematic detail representation of a special component of the mat according to FIG. 3.
In these drawings, the same reference numbers refer to identical or analogous elements.
The mat for lying on presented in the drawings essentially comprises a three-dimensional knitted structure ("Abstandsgewirke"-"face-to-face fabric") with a top layer 1 and a bottom layer 2 separated from each other by a middle layer 3.
At least the top layer 1 and the middle layer 3 are permeable to air, such that an air flow can arise through the top layer 1 and the middle layer 3, more specifically from the middle layer 3 through the top layer 1. In the middle layer 3, the air flow can occur over the entire mat, in all directions. The continuous ventilation thus generated also ensures that the person lying on top of the mat does not suffer from perspiration.
A baby lying with its face on the mat will always receive a sufficient supply of air through the middle layer 3 and the top layer 1 of the mat, so that the risk of suffocation is virtually excluded and furthermore better temperature regulation is possible.
In the middle layer 3 in particular, the amount of free space is very great in comparison to the material from which said layer is formed, and its volume is preferably at least five times the volume of said material.
In the specific embod

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patent: 3691570 (1972-09-01), Gaines et al.
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patent: 5413837 (1995-05-01), Rock et al.
patent: 5552205 (1996-09-01), Lea
patent: 5651847 (1997-07-01), Loeffler

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