Machine for wrapping with sheet material
AssigneeSoremartec S.A.
InventorPier Carlo Scaliti
Life of this patent
Estimating the term…
Abstract
The articles to be wrapped are located over the mouth of a forming device with the interposition of a sheet of wrapping material. Extending from this mouth is a cavity in which, as a result of the advancement of the article caused by a pusher element, the wrapper material is wrapped around the front face of the article relative to its direction of the advance. Subsequently the cavity contracts around behind the article to be wrapped and this contraction completes the wrapping of the wrapper material around the article itself. The preferred application is in the packaging of food products such as, for example, confectionery products.
Claims20
An apparatus for wrapping an article with sheet material by means of a wrapping operation, said apparatus comprising:
- a forming device having an annular mouth and constriction members defining a cavity through which the article advances;
- pusher means which push the article through said cavity so as to cause partial, frontal wrapping of a leading portion of the article with a sheet of the sheet material that has been interposed between the article and said mouth at the beginning of the wrapping operation;
- and
- contraction means which cause contraction of said cavity by constriction inward of said constriction members whereby a portion of the sheet of sheet material trailing the article through the cavity is pinched together behind the article to form a tail of sheet material;
- wherein said contraction means are configured such that said forming device selectively has 1) a first operating configuration during advance of the article through said cavity, at least a subset of said constriction members not constricting inward when said forming device is in said first operating configuration;
- and 2) a second operating configuration after the article has advanced through said cavity, said subset of said constriction members constricting inward to cause contraction of said cavity when said forming device is in said second operating configuration so as to pinch together the portion of sheet material trailing the article through the cavity.
Dependencies are inferred from the claim text.