Stock material or miscellaneous articles – Sheet including cover or casing – Complete cover or casing
Patent
1990-10-15
1992-08-18
Thomas, Alexander S.
Stock material or miscellaneous articles
Sheet including cover or casing
Complete cover or casing
428 75, 428102, 428123, 428125, 428127, 428247, 428256, 428920, B32B 106, B32B 304, B32B 1502
Patent
active
051398397
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
This invention relates to a thermal insulation blanket.
FIELD OF THE INVENTION
Thermal insulation blankets are commonly used on exhausts, turbochargers and other heat generating elements of boats, ships, trucks, power generators and the like. The thermal insulation material comprises a layer of a thermally insulating material typically formed of mineral fibre such as ceramic fibre rock wool or fibre glass.
There are several shortcomings in this technique of thermal insulation. For example, thermal insulation blankets are typically quite fragile and easily damaged through abrasion possibly caused by vibration or incurred during maintenance of machinery. It is important that the insulating blanket maintains its shape so as to provide efficient insulation. With extended use it is known for insulation blankets to become distorted and therefore act inefficiently. Extended use, vibration and distortion of shape may lead to insulation material becoming dislodged and entering the machinery, possibly causing damage and disruption of function.
SUMMARY OF THE INVENTION
The present invention provides a thermal insulation blanket in which the aforementioned inefficiencies and problems of the prior art are reduced.
In accordance with one aspect of the present invention there is provided a thermal insulation blanket comprising a layer of thermal insulation material which is enclosed by a layer of woven metal wire mesh.
In accordance with the present invention the woven metal wire mesh is preferably attached to the layer of insulation material in such manner that there is little movement of the woven metal wire mesh with respect to the insulation material.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic sectional elevation through part of a thermal insulation blanket in accordance with the present invention;
FIG. 2 is a plan view of an insulation blanket in accordance with the present invention; and
FIG. 3 is a plan view to an enlarged scale of one corner of the insulation blanket of FIG. 2 showing a woven wire mesh and stitching at edges of the blanket.
DESCRIPTION OF THE INVENTION
In the accompanying drawings, there is shown a thermal insluation blanket 10. The thermal insulation blanket 10 comprises a central layer of insulation material 12 enclosed within a layer of cloth 14 as shown in FIG. 1. Located externally of the layer of cloth 14 is a layer of woven stainless steel wire mesh 16 which encloses the layer of cloth 14 and the layer of insulation material 12. FIG. 2 shows the layer of woven stainless steel wire mesh 16 covering the whole of one surface of the layer of the cloth 14. The layer 16, as mentioned above encloses completely the layer of cloth 14 and the layer of insulation material 12.
Typically, the woven stainless steel wire mesh 16 is woven in an interlocking loop pattern as shown in FIG. 3 although variations in the weave pattern are possible. The thermal insulation blanket 10 has edges 18. As shown in FIG. 1, the edges 18 may be formed by gathering or inturning of free edges of opposed pieces of cloth forming the layer 14 together with opposed free edges of the woven stainless steel wire mesh 16. The inturned edges of the layers 14 and 16 may project into the layer of insulation material 12 as shown in FIG. 1.
The gathering or inturning of the layers of cloth and mesh results in the woven stainless steel wire mesh 16 being innermost at the edge 18 of the thermal insulation blanket 10.
Further to increase the strength of the edges 18 the gathered or doubled over portions of the layers of cloth and mesh are stitched through with fine stainless steel wire 24 as shown in FIG. 1. The edge stitching is shown in more detail in FIG. 3.
This combination of gathering and stitching at the edges 18 reduces the movement of the layer of woven stainless steel wire mesh 16 relative to the layer of cloth 14 and thus reduces wear on the cloth 14. This also maintains th
REFERENCES:
patent: 2153352 (1939-04-01), Steinberger
patent: 4442585 (1984-04-01), McGehee
Applied Insulation Pty Ltd.
Thomas Alexander S.
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