Thermoformed cup and plate having a burnished rim and a...

B - Operations – Transporting – 24 – B

Patent

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Details

B24B 39/00 (2006.01) B29C 57/12 (2006.01)

Patent

CA 2194810

A thermoformed cup or plate rim burnishing apparatus preferably including a plurality of threaded screws, wherein the threaded screws guide and convey a stack of thermoformed cups or plates through the thermoformed cup or plate rim burnishing apparatus. The rim burnishing apparatus also includes a heating device for applying heat to the rims on the stacked thermoformed cups or plates passing through the rim burnishing apparatus, wherein the threaded screws retain the rims in close proximity to the heating device. As the threaded screws rotate, the stack of cups or plates are also rotated as the threaded screws advance the stack of cups or plates through the rim burnishing apparatus, so that the entire diameter of the rims on the cups or plates pass by the heating device. As the portion of the rim of each cup or plate passes adjacent to the heating device, the rim is heated to a soft moldable state. Thereafter, the rotating threaded screws burnish the now soft cup or plate rim by frictionally rubbing against the cup or plate rim. Additionally, a heating device may be employed which could generate enough heat to polish the cup or plate rims as they are transported past the heating device via the threaded screws.

Appareil servant à polir les bordures de gobelets ou d'assiettes thermoformés, comportant préférablement plusieurs vis à filet servant à guider et à acheminer une pile de gobelets ou d'assiettes thermoformés vers l'appareil servant à polir les bordures de gobelets ou d'assiettes thermoformés. L'appareil servant à polir les bordures comporte aussi un dispositif chauffant servant à appliquer de la chaleur aux bordures de gobelets ou d'assiettes thermoformés empilés passant près de l'appareil servant à polir les bordures, les vis à filet servant à maintenir les bordures à proximité du dispositif chauffant. ~ mesure que les vis à filet tournent, les piles de gobelets ou d'assiettes tournent aussi, les vis faisant avancer les piles de gobelets ou d'assiettes vers l'appareil servant à polir les bordures, de manière à ce que le diamètre complet de la bordure des gobelets ou des assiettes passe près du dispositif chauffant. ~ mesure que la bordure de chaque gobelet ou assiette passe près du dispositif chauffant, elle est chauffée et devient moulable. Les vis à filet polissent ensuite la bordure assouplie des gobelets ou des assiettes, par friction. De plus, un dispositif chauffant peut être utilisé pour générer suffisamment de chaleur pour polir les bordures des gobelets ou des assiettes à mesure qu'ils sont transportés tout près du dispositif chauffant au moyen des vis à filet.

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