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:
Nov. 09, 1999
Filed:
Jun. 26, 1998
Hiroyuki Matsumura, Himeji, JP;
Abstract
A tobacco filter with a circumferential length of 17 to 27 mm is prepared by creping or embossing, with a roller of a temperature not lower than 100.degree. C., a sheet-like material comprising not less than 20% by weight of a cellulose ester component and having a web structure with a basis weight of 20 to 35 g/m.sup.2 and a density of 0.25 to 0.45 g/cm.sup.3, and wrapping up the creped or embossed material into a rod form. The cellulose ester component includes e.g. a cellulose ester short staple, a fibrillated fiber, an esterified fiber and a fiber coated with a cellulose ester. This tobacco filter shows a pressure drop of 200 to 500 mm WG, a firmness of 88% or more and a cross-sectional porosity of 2% or less provided that it has a circumferential length of 24.5 mm and a length of 10 cm.