Abstract

A device for the reversible indication of applied pressure by a colour change comprising a translucent layer and a coloured layer comprising an elastomer associated by means of an apertured layer, comprising one or more apertures.

IPC Classes  ?

• A61F 13/00 - Bandages or dressingsAbsorbent pads
• B41M 5/124 - Duplicating or marking methodsSheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
• B41M 5/136 - Organic colour formers, e.g. leuco dyes

Abstract

This invention relates to pressure indicating materials, in particular sheet materials that indicate pressure by a colour transformation. Materials and two-sheet pressure imaging means are described that comprise a first sheet material comprising a microporous membrane within which is associated a solution comprising a colour former and a second sheet comprising a colour developer.

IPC Classes  ?

• B41M 5/124 - Duplicating or marking methodsSheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
• G01L 1/00 - Measuring force or stress, in general

Abstract

The present invention relates to devices and apparatus for detecting contact and optionally its duration and/or recording the level of pressure and/or its duration and/or recording the level of shear force and/or its duration. In particular, certain embodiments of the present invention relate to devices which comprise an element comprising a hydrophobic material and a colour-forming material dispersed in at least a portion of the hydrophobic material. Certain embodiments of the present invention relates to materials comprising a solid dispersion of a colour-forming material in an elastomeric hydrophobic material. The solid dispersion may take the form of a molecular dispersion or a partial molecular dispersion. Also included in the present invention, although not exclusively, are devices which comprise a hydrophobic material, a colour-forming material and a colour developing material wherein the colour forming material and the colour developing material are brought into contact when pressure of a predetermined threshold level is applied or removed from the device.

IPC Classes  ?

• B41M 5/124 - Duplicating or marking methodsSheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
• B41M 5/132 - Chemical colour-forming componentsAdditives or binders therefor
• B41M 5/136 - Organic colour formers, e.g. leuco dyes

Abstract

The present invention relates inter alia to methods and apparatus for the use and long-term storage of iodine. The present invention has a wide range of applications including for example the treatment of wounds and skin disorders, sterilisation of devices and the treatment of water. In one aspect, the present invention provides an enclosure comprising polyvinylidenedifluoride (PVDF), the enclosure containing an element for providing a source of iodine vapour.

IPC Classes  ?

• A61L 9/015 - Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
• A01N 59/12 - Iodine, e.g. iodophorsCompounds thereof
• A61K 33/18 - IodineCompounds thereof
• C11D 3/48 - Medicinal or disinfecting agents
• A61L 2/20 - Gaseous substances, e.g. vapours