Structure of interfolding machine

An interfolding machine having an framework comprising:

• a feeding section where at least one web of paper is fed;
• an interfolding section comprising:
• cutting rollers on which knives are arranged suitable for dividing the web of paper into sheets of predetermined length;
• folding rollers to which the above described sheets adhere in order to be overlapped in a determined configuration;
• folding elements associated to said folding rollers that arrange the sheets in a determined interfolded configuration forming underneath a stack of product;
• and,
• a separating section where a pack of interfolded sheets is separated from the following and withdrawn from the area of process through separating means;
• wherein said interfolding section comprises a portion having a modular structure removable independently from said framework, said portion comprising at least said folding rollers and being replaceable with an equivalent portion.