Patent ID: 7997570

Claim:
A method for separating a stack of sheets already formed from a stack being formed, during the production of paper packed products, comprising the steps of: a) forming a stack of interfolded sheets piling up on a table located underneath; b) separating two successive interfolded sheets once achieved a predetermined height of said forming stack and defining a formed stack and a forming stack; c) said separating occurring by laterally introducing a first and a second separator into said forming stack from opposite sides with respect to the forming stack for separating the forming stack from the formed stack located underneath on said table; c1) said forming stack having a width and said two separators being introduced from opposite sides between said forming stack and said formed stack for about half of said width such that said separators bear together said forming stack; c2) said two separators leaving at least one wing of sheet hanging free between said two separators, said wing hanging at about half of said width; d) moving away said formed stack from by said table; e) after that said formed stack has been moved away by said table, moving a sheet stretching board under the forming stack for all the stack width to provisionally support said forming stack and for stretching said or each wing for all the stack width, with an end portion of said wing eventually exceeding said sheet stretching board; f) withdrawing said first and second separator up to reaching a position external to said stack being formed while said sheet stretching board continues to support the forming stack, and moving away said first and second separator independently from said sheet stretching board; g) leaving said formed stack by sad table on a conveyor belt or an outlet plane; h) moving back said table up to reaching said sheet stretching board that supports the forming stack; and i) withdrawing the sheet stretching board, with said portion of wing that remains folded between said forming stack and said table.