Method for uniformly distributing discrete particles on a moving porous web
US4551191A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1984 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Jun 29, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1737
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention comprises method and apparatus for substantially uniformly distributing a layer of discrete particles along a predetermined portion of the uppermost surface of a moving porous web so that the particles occupy less than 100% of the predetermined portion of the uppermost surface of said moving web. The method preferably comprises the steps of PA1 (a) entraining the particles into a moving gaseous stream; PA1 (b) passing the gaseous stream through a conduit having a discharge end with a nozzle exit positioned adjacent the uppermost surface and oriented so as to discharge the gaseous stream containing said entrained particles in a direction substantially parallel to the direction of travel of the moving porous web; PA1 (c) mixing the particles entrained in the gaseous stream inside the conduit to provide a substantially uniform distribution of the particles, as measured across the width of the nozzle exit of said conduit in a direction perpendicular to the direction of travel of said moving porous web; PA1 (d) discharging the gaseous stream containing the uniformly distributed entrained particles from the conduit adjacent the predetermined portion of the uppermost…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.