Patent ID: 7654386

Claim:
A machine for wrapping bundles of roll products, where the products are grouped together in piles formed from superposed layers of products, said machine comprising at least: a bundle forming line equipped with a chain conveyor where an endless flexible element trained around a pair of pulleys to form a horizontally elongated ring mounting projecting pushers; and a product feed line, serving the forming line and having an elevator which is equipped with a product supporting platform and which is vertically mobile under the forming line at least between a lowered position where it receives the products and a raised position where it delivers the products to the forming line, a screw mechanism fixed to a fixed machine mounting structure and screwed on a lead nut placed inside a mounting frame onto which the chain conveyor comprised of the endless flexible element, the pair of pulleys and the pusher rods are mounted; the screw mechanism screwing into said lead nut for adjusting the position of the chain conveyor comprised of the endless flexible element, the pair of pulleys and the pusher rods relative to the raised position of the product supporting platform.