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:
Apr. 11, 1995
Filed:
Sep. 21, 1992
Applicant:
Inventors:
Bruno Belvederi, S. Martino di Monte S. Pietro, IT;
Giulio Barbieri, Anzola Emilia, IT;
Assignee:
G.D Societa' per Azioni, Bologna, IT;
Primary Examiner:
Int. Cl.
CPC ...
A24C / ; B23K / ;
U.S. Cl.
CPC ...
131281 ; 2191217 ;
Abstract
A device for perforating cigarette wrapping material by means of at least one-laser beam, whereby the wrapping material, in the form of a strip, is fed past a focusing head which is supplied with a pulsed laser beam by a laser source and focuses it on to the strip by moving the focused beam in a plane slanting in relation to the traveling direction of the strip; a shutter element, made of material impervious to the laser beam, being used for intercepting and restricting the focused beam to a sector of given shape and size, and so preventing the beam from impinging on given portions of the strip.