Assembly for producing paper packaging for fast food, particularly comprising deep coated pleats

Assembly for producing fast food packaging for sandwiches or loose products, using a pleated element made from a paper strip having a width and coated on one side with polypropylene and/or polyethylene, comprised of deep coated pleats parallel to one another and fixed at their ends, this production assembly being comprised of a paper feed module feeding a pleating module, said pleating module being provided with a pleat forming mechanism and a pleat coating mechanism pleating the paper strip coming from a reel of the paper feed module to obtain a free pleated paper strip, module being followed by a unit for fixing the end of the pleats producing a pleated paper strip, which then penetrates into a finishing unit wherein:

• the pleating module comprises a preforming wheel and a preforming counter-wheel forming the pleat-forming mechanism, a bar wheel, a pleat grouping wheel and a pleat coating wheel forming the pleat coating mechanism,
• the unit for fixing the end of the pleats and the finishing unit are in the form of separate modules, the finishing module being specific to each type of packaging manufactured, thereby producing a completed packaging container,
• the production assembly includes a collecting and processing module collecting the completed packaging of the finishing module, and wherein the finishing module comprises three series of aligned and motorized disks, two series of disks of which are positioned beneath the pleated paper strip, the third series of disks being positioned above the pleated paper strip, which are oriented to form an “M” with the pleated paper strip which closes gradually, causing each pleatless zone to face itself.

Assembly for producing fast food packaging for sandwiches or loose products, using a pleated element made from a paper strip having a width and coated on one side with polypropylene and/or polyethylene, comprised of deep coated pleats parallel to one another and fixed at their ends, this production assembly being comprised of a paper feed module feeding a pleating module, said pleating module being provided with a pleat forming mechanism and a pleat coating mechanism pleating the paper strip coming from a reel of the paper feed module to obtain a free pleated paper strip, the pleating module being followed by a unit for fixing the end of the pleats producing a pleated paper strip, which then penetrates into a finishing unit wherein:

• the pleating module comprises a preforming wheel and a preforming counter-wheel forming the pleat-forming mechanism, a bar wheel, a pleat grouping wheel and a pleat coating wheel forming the pleat coating mechanism,
• the unit for fixing the end of the pleats and the finishing unit are in the form of separate modules, the finishing module being specific to each type of packaging manufactured, thereby producing a completed packaging container,
• the production assembly includes a collecting and processing module collecting the completed packaging of the finishing module, and wherein the pleat fixing module is mainly comprised of a chassis comprising two conveyor belts which pinch the free pleated paper strip above and below, the width of said conveyor belts leaving free the end of the pleats of the free pleated paper strip, which makes it possible to mark a fold line on each side of the free pleated paper strip using a creasing device comprised of at least two rollers with narrow edges pinching the free pleated paper strip against the same number of wide rollers, these latter being motorized at a speed synchronized with that of the free pleated paper strip, which then passes through a zone equipped with hot air nozzles, the edges of which enter into a shaping device which folds them by placing the coated side of the free pleated paper strip in contact with itself, the folded edges then passing between wide knurling rollers, which are motorized and synchronized with the displacement speed of the paper strip, to form the pleated paper strip.