Applying fluid additive to fibrous material
US5340609A · kind A · utility
21Cited by
8References
54Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1990 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Mar 16, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06B19/0094
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Air is blown into filter tow during or immediately after the application of plasticizer; this foams and distributes the plasticizer in the tow. Air may be delivered from a porous plate closely adjacent to the path of the tow or from nozzles in an air injecting unit. Alternatively air may be used to foam plasticizer at a location remote from the tow and foamed plasticizer subsequently conveyed to and into the tow by a roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.