Packaging Machine For Packaging Rolls Wound Around Winding Cores

Abstract

The packaging machine including an insertion station for inserting rolls in wrapping sheets, a feed path of the rolls; a conveyor to feed the rolls along the feed path. Along the feed path there is provided a folding station, to fold the wrapping sheets and wrap the rolls in the wrapping sheets. The folding station includes, on each side of the feed path, at least one punch provided with a movement of insertion and extraction with respect to the hole of the tubular winding core of the rolls to be packaged. The punch includes a shaft rotating about a rotation axis, which supports an end pin, idle and rotatable about an axis substantially parallel and eccentric with respect to the rotation axis of the rotating shaft.

Description

TECHNICAL FIELD[0001]The present invention relates to packaging machines for packaging rolls of paper, for example tissue paper, such as toilet paper, kitchen towels or the like, or rolls of other web materials wound around tubular winding cores.STATE OF THE ART[0002]In the paper converting and roll producing industry packaging machines are known for producing single or multiple packs of rolls. To wrap and package the rolls, some of these machines use sheets of plastic material, in particular polyethylene or the like. In these machines, a group of rolls, appropriately arranged in one or more rows and in one or more layers, are inserted into a sheet of plastic and subsequently moved forward by means of a conveyor through a folding station. In the folding station, the flaps projecting from both sides of the group of rolls are folded against the front surfaces of the rolls. At the exit of the folding station the pack thus obtained is made to pass through a sealing station which, by mea...

AI Technical Summary

Benefits of technology

The patent describes a method of packaging a roll of paper using a tubular winding core and a wrapping sheet. To ensure a better quality pack, the wrapping sheet is compressed by pins inserted into the opposite ends of the winding core. A rotating shaft and a disk-shaped member are used to stabilize the folds on the wrapping sheet. Additional punches and folding profiles can be used to further improve the quality and appearance of the pack. The patent also suggests using several folding profiles and punches to increase productivity and simultaneously pack several rolls inside the machine. Overall, the method results in a more efficient and effective packaging process.

Problems solved by technology

In general, packaging machines based on the twist-and-tuck principle have some problems due to the stresses to which the wrapping sheet is subjected, in particular in the step of inserting the folded flaps thereof inside the tubular winding core.

Moreover, in their extraction movement from the ends of the winding cores, the punches tend to draw the folded flaps of the sheet with them, making the last folding step not completely satisfactory and, in certain cases, giving rise to defective packs.

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