Hub ring and supporting plate for a filter and methods for manufacturing these members
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United States of America Patent
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Nov 3, 1998
Issued Date -
N/A
app pub date -
Sep 24, 1997
filing date -
Mar 23, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a hub ring for a filter wherein a supporting member having a plurality of supporting portions is interposed between a pair of keep plates, a supporting plate for a filter wherein a plurality of wave portions extending substantially in the circumferential direction are arranged in the radial direction, and methods for manufacturing these members. The hub ring has a great opening ratio to achieve a low pressure loss property and causes substantially no residence of polymer, and the hub ring can be manufactured at a low cost. The supporting plate has high pressure resistance, low-pressure loss property, good directivity of polymer flow and excellent polymer mixing effect, and it is suitable for use as a retainer disposed inside of a filter.
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