Device for applying a decoration to a crate

B - Operations – Transporting – 65 – C

Patent

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Details

B65C 9/18 (2006.01)

Patent

CA 2335612

The invention relates to a device for applying a decoration to containers such as, for example, crates, bottles or cans. The decoration comprises an image transfer label supplied to the containers on a carrier strip. The carrier strip is pressed laterally, by means of a pressure roller, against the containers, which are fed past the pressure roller. A heating device, such as, preferably, a hot air blower, heats the image transfer label on the application side of the carrier strip. Preferably, a flat stream of air is blown, by the hot air blower, against the line of contact between the image transfer label and the container. As a result of the use of highly local heating of the application side of the carrier strip according to the present invention, activation of the image transfer label is obtained without the carrier strip or the surface of the container being heated to a substantial extent. As a result, undesired stretch in the carrier strip is prevented and the temperature of the image transfer label can remain relatively low, so that the quality of the inks is retained and complete transfer to the containers is possible. The pressure roller is also able to operate at relatively low temperatures, so that a long life thereof is obtained. As a result of the highly local heating on the application side, the contact time required for transfer of the image transfer label is reduced substantially, so that a high throughput is possible.

La présente invention concerne un dispositif permettant d'appliquer un motif décoratif sur des conteneurs tels que, par exemple, des caisses, des bouteilles ou des boîtes. Le motif décoratif comprend une étiquette de transfert d'image distribuée aux conteneurs sur une bande support. Un rouleau de pression presse la bande support latéralement contre les conteneurs qui passent le long du rouleau de pression. Un dispositif chauffant tel que, par exemple, un ventilateur à air chaud, chauffe l'étiquette de transfert d'image sur la face d'application de la bande support. De préférence, le ventilateur à air chaud souffle un courant d'air plat sur la ligne de contact entre l'étiquette de transfert d'image et le conteneur. Grâce à l'échauffement extrêmement localisé de la face d'application de la bande support qui caractérise l'invention, on obtient une activation de l'étiquette de transfert d'image sans échauffement sensible de la bande support ou de la surface du conteneur. Ce procédé permet d'éviter tout étirement indésirable de la bande support et de maintenir relativement basse la température de l'étiquette de transfert d'image, afin de préserver la qualité des encres et d'assurer un transfert d'image complet sur le conteneur. Le rouleau de pression est capable de fonctionner à des températures relativement basses, ce qui permet d'augmenter sa durée de vie utile. En raison de l'échauffement extrêmement localisé de la face d'application, le temps de contact nécessaire au transfert de l'étiquette de transfert d'image est sensiblement réduit, ce qui permet également d'améliorer le rendement.

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