Filtering medium and method of making the same

• US 3,019,127 A
• Filed: 10/07/1957
• Issued: 01/30/1962
• Est. Priority Date: 10/07/1957
• Status: Expired due to Term

• Current Assignee: Lawrence J. Czerwonka, Robert F. Logsdon
• Original Assignee: Lawrence J. Czerwonka, Robert F. Logsdon
• Inventors: Czerwonka, Lawrence J., Logsdon, Robert F.
• Application Number:
  US03/688,732
• Time in Patent Office: 1,576 Days
• US Class Current: 428/338
• CPC Class Codes: B01D 39/00 Filtering material for liquid or gaseous fluids
• CPC Class Codes: C01B 32/382 Making shaped products, e.g. fibres, spheres, membranes or foam
• CPC Class Codes: Y10T 428/268 Monolayer with structurally defined element

Claims

16. A METHOD OF MAKING A FLUID TREATING FILTERING MEDIUM COMPRISING THE STEPS OF PASSING A FIBROUS PAD OF FILTER MATERIAL INTO A SPRAYING ZONE, SPRAYING SAID PAD OF FILTER AMOUNT OF LIQUID ADHESIVE SUFFICIENT TO INSURE SAID PAD IS THROUGHLY TREATED WITH SAID ADHESIVE, REMOVING SAID PAD FROM SAID SPRAYING ZONE AND EXPOSING SAID PAD TO THE ATMOSPHERE FOR A PERIOD OF TIME SUFFICIENT TO DEVELOP MAXIMUM TACKINESS OF SAID ADHESIVE, PASSING SAID PAD TO A PARTICLE IMPREGNATING ZONE, IMPREGNATING SAID PAD WITH ACTIVATED FLUID TREATING PARTICLES, VIBRATION SAID PAD TO INSURE DISTRIBUTION OF SAID PARTICLES IN SAID PAD, PASSING SAID PAD TO A HEATING ZONE, AND CURING SAID PAD IN SAID HEATING ZONE AT TEMPERATURES SUFFICIENT TO REACTIVATE ANY OF SAID FLUID TREATING PARTICLES WHICH MIGHT HAVE BEEN DEACTIVATED BUT BELOW THE DECOMPOSITION TEMPERATURE OF SAID ADHESIVE.