Abstract: The invention concerns a method for producing a cigarette filter unit, in which filter elements are disposed on a porous or perforated covering strip and at least partially wrapped thereby and adhesively joined. The adhesive substance is applied to the covering strip along coating tracks which are at least approximately equidistant from each other and extended at an angle to the longitudinal orientation of the covering strip. The filter strand formed in this manner is subdivided by a cutting device.
Type:
Grant
Filed:
November 14, 1983
Date of Patent:
February 26, 1985
Assignees:
F. J. Burrus & Cie., Baumgartner Papier S.A.
Abstract: The invention concerns a method for producing a cigarette filter unit, in which filter elements are disposed on a porous or perforated covering strip and at least partially wrapped thereby and adhesively joined. The adhesive substance is applied to the covering strip along coating tracks which are at least approximately equidistant from each other and extended at an angle to the longitudinal orientation of the covering strip. The filter strand formed in this manner is subdivided by a cutting device.
Type:
Grant
Filed:
March 31, 1978
Date of Patent:
August 4, 1981
Assignees:
F. J. Burrus & Cie., Baumgartner Papier SA
Abstract: Cigarette filter units are made in a long strip with alternate portions of fibrous and pourable filter material. The fibrous portions are first attached at spaced intervals to a sheathing strip which is wrapped practically right around them to form a cylinder with regular empty spaces between the fibrous portions and openings into the spaces. In a special unit, air is extracted from these spaces so that when the spaces enter a chamber containing pourable filter material, they suck the material in to fully fill the spaces. Excess filter material is brushed off the filter unit, and a sealing strip is stuck over the openings.
Type:
Grant
Filed:
July 21, 1978
Date of Patent:
January 29, 1980
Assignees:
F. J. Burrus & Cie, Baumgartner Papiers S.A.
Abstract: The present invention relates to a new type of filter for tobacco smoke, which filter has a diffusion portion, in which the smoke stream is separated from the outer air by means of a membrane, which is permeable to low molecular smoke constituents.
Type:
Grant
Filed:
February 26, 1975
Date of Patent:
July 5, 1977
Assignees:
Svenska Tobaks AB, F.J. Burrus & Cie
Inventors:
Sven-Olof Almqvist, Curt R. Enzell, Lasse O. Hjern, Antoine Artho, Robert Koch