Filter manufacturing apparatus
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United States of America Patent
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May 12, 2020
Grant Date -
Dec 6, 2018
app pub date -
Nov 25, 2016
filing date -
Nov 27, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a filter manufacturing apparatus (1) 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 (30); —a forming device (4) 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 (8) adapted to allow the filter material to pass therethrough, ▪ a pin (34) extending longitudinally within the tubular forming element, the pin having a pin diameter;—a diameter changing device (40), adapted to vary the pin diameter of the pin, so as to obtain a filter body having a through hole of variable diameter.
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