The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 2008
Filed:
Dec. 03, 2004
Ivan Eusepi, Castel Maggiore, IT;
Armando Turrini, S. Giovanni in Persiceto, IT;
Fiorenzo Draghetti, Medicina, IT;
Ivan Eusepi, Castel Maggiore, IT;
Armando Turrini, S. Giovanni in Persiceto, IT;
Fiorenzo Draghetti, Medicina, IT;
G.D S.p.A., Bologna, IT;
Abstract
Filters for tobacco products are manufactured by a device comprising a conveyor drum rotatable about a horizontal axis and furnished with peripheral grooves, each holding a leaf of paper material preassembled with a first filter element. The single groove is flanked by two tubular elements arranged symmetrically on either side of the drum, slidable axially between a first position located externally of the groove and a second position located internally of the groove, also by pushers slidable within the respective tubular elements and serving to direct second and third filter elements into contact with the end faces of the first filter element in such a way that the second filter element, which consists in a measure of powder or granular material deposited in each tubular element by way of a spool valve, remains interposed between the first and the third filter element. The leaf of paper material is engaged by a folder mechanism associated with the groove and closed around the two tubular elements to form a tubular wrap.