Textiles: knitting – Fabrics or articles – Articles
Reexamination Certificate
2003-02-06
2004-06-29
Worrell, Danny (Department: 3765)
Textiles: knitting
Fabrics or articles
Articles
C066S202000, C340S561000
Reexamination Certificate
active
06755050
ABSTRACT:
The present invention relates to a sheet element according to the preamble of claim
1
. The intention also relates to a use of the sheet element as casing or lining material in a container or in a space intended for the storage of theft-attractive objects and similar objects.
WO 93/23648 describes a sheet element that includes an alarm-raising security mat and that can be used to particular advantage as casing material or lining in a security container fitted with alarm raising means or in a security space equipped with alarm raising means and intended for the storage of objects that shall be protected against unauthorised access.
The sheet element illustrated in WO 93/23648 includes an alarm mat comprised of one or more electrically conductive threads or corresponding devices that include insulating layers and that are disposed in continuous stitches, loops or eyes of the kind obtained when knitting or crocheting. An alarm mat of this construction is extremely effective in resisting interferences and disturbances from electromagnetic force fields, static electricity and similar phenomena.
Because of the fine-mesh structure of the mat included in the sheet element described in WO 93/23648, it is very difficult to force open the element without breaking a thread or wire and therewith raising an alarm and, for instance, without causing the destruction of valuable objects stored in a container that includes such a sheet element.
The object of the present invention is to provide a sheet element that includes an improved alarm mat which is still more difficult to force and even more difficult to manipulate than the above described alarm mat. This object is achieved with a sheet element that has the characteristic features set forth in the accompanying Claims.
Among the many advantages afforded by the invention, it can be mentioned that the sheet element can be given thin walls and made light in weight, therewith providing weight advantages with respect to the transport container in which the sheet element is used, among other things.
The inventive sheet element is constructed to deal with external interferences in the form of, e.g., magnetic fields, static electricity, radio int rferences, interference waves and similar phenomena in a highly effective manner.
The sheet element can be given an intrinsic rigidity such as to enable a self-supporting container to be constructed therefrom, for example.
The sheet element can be produced in desired shapes and curvatures, therewith also enabling containers of complicated shapes to be produced with the aid of the sheet element.
The walls of existing spaces, rooms, etc., can be covered or lined with inventive sheet elements to provide desired theft protection.
The inventive sheet element includes an alarm mat that has an eminent ability to withstand and extinguish interferences from electromagnetic force fields, static electricity and similar phenomena, therewith improving the possibilities of obtaining a quick reacting alarm raising device.
The inventive sheet element enables conditions to be provided for reliable burglary projection in the absence of resistance measurements, therewith reducing current consumption with respect to the alarm-raising device used.
The inventive sheet element includes an alarm mat which according to one particular embodiment of the invention is constructed to effectively prevent alarm-free penetration of the sheet element by heating the element or by some other temperature dependent manipulating process.
REFERENCES:
patent: 362010 (1887-04-01), Jewill
patent: 708093 (1902-09-01), Sutton
patent: 3696373 (1972-10-01), Dunn et al.
patent: 5539379 (1996-07-01), MacPherson
patent: 5592149 (1997-01-01), Alizi
patent: 5677674 (1997-10-01), Wolf
patent: 6215397 (2001-04-01), Lindskog
patent: 6400268 (2002-06-01), Lindskog
patent: 9323648 (1993-11-01), None
patent: 9502742 (1995-01-01), None
SQS Security Qube System AB
Stone Mark P.
Worrell Danny
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