Capsules

A - Human Necessities – 61 – J

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A61J 3/07 (2006.01) B29C 65/04 (2006.01) B29C 69/02 (2006.01)

Patent

CA 2346133

Capsules, for example for the delivery of pharmaceuticals, are produced from two films of a water-soluble polymeric material, by deforming the films to form a multiplicity of recesses, and filling the recesses with a flowable filling material. The films are then welded together by dielectric welding to form filled capsules, which are cut or punched out of the welded film. These steps may be performed at a single location so as to avoid any problems with registration of the recesses with the welding or cutting means. The polymeric material may be gelatin, or a water-soluble cellulose derivative such as hydroxypropyl methyl cellulose, and may also contain a plasticiser.

L'invention concerne des capsules destinées, par exemple, à la libération de produits pharmaceutiques. On produit ces capsules à partir de deux films à base d'une matière polymère soluble dans l'eau, ces films étant déformés de manière à former plusieurs creux et les creux étant remplis avec une matière de remplissage fluide. Ensuite, on soude les films l'un à l'autre par soudage diélectrique pour former des capsules remplies, que l'on coupe ou que l'on extrait par perforation du film soudé. On peut réaliser ces phases dans un emplacement unique pour éviter tout problème de repérage des creux par le dispositif de soudage ou de coupe. La matière polymère peut être de la gélatine ou un dérivé de cellulose soluble dans l'eau tel que l'hydroxypropylméthylcellulose, et peut également contenir un plastifiant.

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