US PATENT SUBCLASS 55 / 497
.~.~ Edge supporting or securing means for nonplanar sheet form filter (e.g., zigzag)

Current as of: June, 1999
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55 /   HD   GAS SEPARATION

490  DF  WITH MEANS SECURING OR RETAINING SEPARATING MEDIA {7}
495  DF  .~ Unit or cohesive sheet-like media in flow line or frame {12}
497.~.~ Edge supporting or securing means for nonplanar sheet form filter (e.g., zigzag) {2}
498  DF  .~.~.~> Spiral or cylindrical
499  DF  .~.~.~> With additional transversely arranged members

DEFINITION

Classification: 55/497

(under subclass 495) Apparatus comprising means engaging the sheet form filter substantially at the running edge to maintain the said sheet in other than planar configuration or to support the nonplanar sheet in a flow line, any facial engagement being proximate the said edge.