Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1998-05-05
2000-08-22
Loney, Donald
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428187, 424443, 206534, 264509, D24100, B32B 300, A61F 1300
Patent
active
061069302
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention relates to a preparation, consisting of a sheet-like, film-like or wafer-like administration form with a coding in the form of characters and/or graphic symbols or patterns for identifying the substances affecting flavour or odour and/or the therapeutic or curative substances which can be released therefrom during use.
Manufacturers of pharmaceutical products are increasingly obliged to identify not only the primary packaging, but also the product itself. This especially applies to medicaments in an administration form aimed at controlling the release of active substance.
In the prior art, medicaments in the form of pills, tablets and foil-like or film-like products are usually coded in an operation which is additional to the actual manufacture, by printing or punching of special characters or patterns. In addition to the outlay necessitated by this, with correspondingly increased production costs, the introduction of a printing medium, a printing ink, in the printing process, for example, is not uncontroversial, because at least in some cases this creates or unnecessarily increases the risk of allergization.
The object on which the invention is based is to make available, for a preparation of the generic type specified in the preamble, a coding in the form of characters and/or graphic symbols or patterns which avoids the abovementioned disadvantages, in particular the application of a foreign substance such as printing ink, and which consequently avoids the risk of allergization and reduces the corresponding outlay for a coding subordinate to production.
The object is successfully achieved according to the invention, in a preparation of the type mentioned in the preamble of claim 1, by virtue of the fact that the coding is formed by surface areas of differing thickness.
By forming surface areas of differing thickness for the purpose of coding, the application of a logo by printing with food colourings, and the disadvantages described in relation to this, are avoided. Instead, according to the invention, by means of patterned differences in the layer thickness of the film-like or wafer-like administration form, a logo visible to the eye is created in the surface area of the preparation, this logo roughly corresponding in its effect to a so-called watermark in paper-like dispersions. The invention accordingly represents an advantageous alternative to the application of product markings by printing with foreign substances. Although the formation of "watermarks" when drying dispersions on structured supports is likewise based on the formation of thickness variations of the sheet-like paper dispersions, it has never previously been proposed to use this type of identification in connection with film-like, paper-like or wafer-like administration forms for therapeutic or curative substances.
In one embodiment of the preparation, the areas of differing thickness are formed under the production conditions while avoiding different density or compression.
In a further embodiment of the preparation, the areas of differing thickness have a different density (compression).
The method according to the invention for producing the preparation involves the symbols or patterns of the coding being introduced by means of an irreversible deformation in the plastically deformable state.
One method according to the invention for producing the preparation involves the symbols or patterns of the coding being formed in the course of production without the action of pressure (compression).
A further method according to the invention for producing the preparation involves the symbols or patterns of the coding being applied under the action of pressure (compression).
In one embodiment, the thickness differences are produced by coating of a support which has a sequence of elevations and/or depressions corresponding to the coding. Such elevations and depressions can be arranged, for example, on a support similar to a pressure plate by grinding or etching.
In a further proposal according to the invention, the th
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patent: 4717615 (1988-01-01), Reinhart
patent: 4895257 (1990-01-01), Winslow
patent: 4945215 (1990-07-01), Fukushima et al.
patent: 4995408 (1991-02-01), Wallschlaeger
Isis Pharmaceuticals , Inc.
Loney Donald
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