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:
Sep. 23, 1980
Filed:
Oct. 31, 1977
Jean-Pierre Lebet, Montreaux, CH;
Baumgartner Papiers S.A., Crissier, CH;
Abstract
In a method of producing a cigarette filter, the filter material being visible through a filter chamber, the steps include spacing a plurality of filter elements successively apart at uniform separating distances, joining the filter elements to a continuous covering strip along a longitudinal portion thereof, so as to cover the filter elements continuously to form a filter cord having a plurality of the chambers, and so that lateral edges of the covering strip define a predetermined constant width of a slit extending over the entire length of the filter cord, and a plurality of openings extending over the separating distances, respectively, in the filter cord, sliding a filling device adapted to hold granular filter material over the openings in intimate contact with smooth surface portions of the covering strip, filling the chambers with the granular filling material, sealing the chambers upon completion of the filling step by a sealing strip, and cutting the filter cord into a plurality of individual sections.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile