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. 22, 1986
Filed:
Jul. 07, 1983
Applicant:
Inventors:
Takashi Sakai, Toyama, JP;
Kazuo Maeda, Kanagawa, JP;
Masuo Kawabata, Kanagawa, JP;
Mituo Kono, Tokyo, JP;
Assignees:
Mitsubishi Acetate Co., Ltd, Tokyo, JP;
Japan Tobacco Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
A24D / ; B34C / ;
U.S. Cl.
CPC ...
131336 ; 131338 ; 131339 ; 131344 ; 493 39 ; 493 42 ; 493 47 ; 493 50 ;
Abstract
A tobacco smoke filter includes a corrugated tape-like wrapping which, together with an outer perforated or otherwise air-permeable paper, defines a set of longitudinal grooves. Each of the grooves includes a blocking member, so as to inhibit direct smoke flow through the grooves and promote a ventilation effect. The blocking members in each groove are longitudinally staggered from one groove to the next to simplify the production of the device.