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:
May. 12, 2020
Filed:
Nov. 25, 2016
Philip Morris Products S.a., Neuchatel, CH;
Gianni Caprini, Zola Predosa, IT;
Philip Morris Products S.A., Neuchatel, CH;
Abstract
The invention relates to a filter manufacturing apparatus () to form a hollow filter body, the filter manufacturing apparatus comprising: —a feed path adapted to continuously feed a filter material along a longitudinal transport direction (); —a forming device () connected to a terminating end of the feed path and adapted to form the filter material into a hollow rod-shaped filter body and deliver the formed filter body, the forming device including: ▪ a tubular forming element () adapted to allow the filter material to pass therethrough, ▪ a pin () extending longitudinally within the tubular forming element, the pin having a pin diameter;—a diameter changing device (), adapted to vary the pin diameter of the pin, so as to obtain a filter body having a through hole of variable diameter.