Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Sample mechanical transport means in or for automated...
Patent
1997-08-06
1999-08-10
Alexander, Lyle A.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Sample mechanical transport means in or for automated...
604 1, 436 63, 436164, G01N 3348
Patent
active
059355212
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for collecting the secretion of sebum from skin.
BACKGROUND OF THE INVENTION
Such collecting or measuring systems are required to assess the amount and the distribution of the secretion of sebum from the skin by measurement. From U.S. Pat. No. 5,119,828, the use of a microporous hydrophobic sebum absorbing opaque film is known, the pores of which can fill with sebum from the skin when in contact with the skin, whereby they can make the initially opaque film transparent to light. The film has rigid paper adhered thereto, which is black in the contact area of the film on the skin. It is a disadvantage of such a collecting or measuring system that the paper accommodating the film will be kinked upon application, whereby the optical evaluation of the skin print on the film is made more difficult or falsified.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved collecting or measuring means for determining the secretion of sebum from the skin, wherein the reproducibility of the measuring values is improved and the evaluation is facilitated.
The invention advantageously provides that the sebum absorbing film is connected to a substrate in the edge portion, the substrate being cut out or transparent in the area of the film to be brought into contact with the skin surface. Such a collecting or measuring means makes sure that the sebum absorbing film is clamped and can be evaluated in a smooth state after application. In particular, an optical or opto-electronic evaluation using the transmitted light method is possible so that the evaluation can be performed with a high measuring accuracy, especially when using opto-electronic means. Here, it is essential that the surface of the sebum absorbing film is perfectly plane so that, upon evaluation, no focussing problems will occur that could falsify the measuring results.
The substrate may be annular in shape. Here, the substrate may be made of two rings clamping the sebum absorbing film between them.
The substrate may be made of a transparent rigid substrate film connected in the edge portion with the sebum absorbing film on the side of the film averted from the skin surface.
A non-adhesive transparent film may be arranged between the sebum absorbing film and the substrate. Such a film serves to support the sebum absorbing film.
At least the edge portion of the substrate surface facing away from the skin surface has an adhesive area. Thereby, the film can be fastened to a device for evaluating the sebum absorbing film.
The adhesive area of the substrate film may be provided with a protective film, e.g. of silicon material, whereby the adhesive area is protected prior to use.
Preferably, the at least one film has its edge portion welded ultrasonically to the substrate. Ultrasonic welding is advantageous in that no adhesive can influence the properties of the sebum absorbing film.
The substrate may be adhered by its adhesive area with a support frame adapted to an optical or opto-electronic evaluation means and having a cut out or transparent central area. For example, it is possible to adhere the substrate with the sebum absorbing film onto a slide frame and to transfer it to an automatic evaluation wit this frame.
The following is a detailed description of embodiments of the invention taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a cross section of a first embodiment of the present invention,
FIG. 2 illustrates a test strip,
FIG. 3 is a cross section of a second embodiment, and
FIG. 4 illustrates a support frame for evaluating the film print.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
According to a first embodiment illustrated in FIG. 1, the collecting means or measuring means for determining the secretion of sebum from the skin is multi-layered and comprises a sebum absorbing outer film 4 connected at two opposite edge portions 12 with a substrate film 6 of a transparent rigid material, a protective film 14 with an adhesive layer 10, prefera
REFERENCES:
patent: 4483619 (1984-11-01), Leveque et al.
patent: 5119828 (1992-06-01), Miller
Alexander Lyle A.
Courage + Khazaka electronic GmbH
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