Abstract: An example includes a method for forming tubular lengths of linear web material. The example can include winding a portion of linear web material in a tubular configuration such that opposite vertical ends of said linear portion overlap. The example can include welding said overlapping ends to fix said linear portion of linear web material in sleeve configuration. This welding can include heating up at a first temperature a first region of said portion over the whole of which said ends overlap and heating up at a second temperature lower than said first temperature a second region of said portion adjacent to said first region, said ends of said portion of linear web material overlapping over only a part of said second region.

Abstract: An example includes a method for forming tubular lengths of web material. The example can include winding a portion of web material in a tubular configuration such that opposite vertical ends of said linear portion overlap. The example can include welding said overlapping ends to fix said linear portion of web material in sleeve configuration. This welding can include heating up at a first temperature a first region of said portion over the whole of which said ends overlap and heating up at a second temperature lower than said first temperature a second region of said portion adjacent to said first region, said ends of said portion of labelling web material overlapping over only a part of said second region. One or more examples relate to a forming unit configured to implement the method outlined above.

Abstract: There is disclosed a conveying apparatus for articles, provided with a first conveyor having an inlet section for articles to be conveyed and an outlet section for the articles, and with a second conveyor which can be selectively set in communication with a transfer section of the first conveyor; the first conveyor is selectively set in a first operative release configuration of the articles at the outlet section and in at least one second operative release configuration of the articles at its transfer section; the second conveyor is selectively set in a first operative withdrawal configuration of the articles from the first conveyor at its transfer section and at least in one second operative inhibition configuration of this withdrawal.