Method of producing a tinned food container

B - Operations – Transporting – 21 – D

Patent

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Details

B21D 51/38 (2006.01) B29C 65/50 (2006.01) B65B 7/28 (2006.01) B65B 47/04 (2006.01)

Patent

CA 2200965

The invention relates to a method of producing a tinned food container wherein the container body 1 consists of a flat material, especially aluminium strip or tinplate strip which is deep-drawn and which, at least in the region of its planar end flange, is provided with a coating 2, especially a sealing coating, and wherein a cover 4 is provided with a further coating, especially a further sealing coating, and consisting of a foil material, especially aluminium foil, is sealed on to the edge flange under the influence of pressure and/or heat. To make the production method more economical, it proposed that for producing a container body with an intermediate sealing layer 3 additionally inserted during the sealing-on operation, first the blank for the container body 1 and intermediate sealing layer 3 is punched in one piece out of the flat material, with the intermediate sealing layer 3 subsequently being separated from the container body 1 in the region of the edge flange, and that then, after the deep-drawn container body has been expanded towards its edge flange and/or after the dimensions of the intermediate layer have been reduced, the intermediate sealing layer 3 is placed on to the edge flange.

Selon ce procédé de fabrication de récipients pour conserves, le corps (1) du récipient est constitué d'un matériau plat, notamment d'une bande d'aluminium ou de fer-blanc emboutie profond et pourvue au moins dans la zone de son rebord plat d'un revêtement (2), notamment d'un revêtement de scellement. Un couvercle (4) en un matériau pelliculaire, notamment un film d'aluminium, pourvu d'un autre revêtement (5), notamment d'un autre revêtement de scellement, est scellé sur le rebord sous pression et/ou thermiquement. Afin d'augmenter le rendement du procédé de fabrication, le corps du récipient pour conserves est fabriqué avec une couche intermédiaire supplémentaire de scellement (3) posée pendant le scellement. On découpe d'abord les flans du corps (1) du récipient avec la couche intermédiaire de scellement (3) dans le même matériau plat, puis on sépare la couche intermédiaire de scellement (3) du corps (1) du récipient dans la zone du rebord de celui-ci et on pose la couche intermédiaire de scellement (3) sur le rebord du corps du récipient, après avoir élargi le corps embouti profond de la boîte pour former son rebord et/ou après avoir réduit les dimensions de la couche intermédiaire de scellement.

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