| VISKASE COMPANIES, INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110027404 | MULTI-TUBE EXTRUSION APPARATUS AND METHOD - A method and apparatus for producing a plurality of bi-oriented, heat-shrinkable thermoplastic tubular films is disclosed. Thermoplastic resin is extruded through a plurality of annular dies to form a plurality of molten plastic tubes. The tubes are cooled and solidified and sent through a plurality of pinch rollers to stretch the tubes simultaneously in a machine and transverse direction, creating a plurality of tubular films. The films are cooled and heated, and then relaxed simultaneously in a machine and transverse direction. Winding rollers then wind up the finished tubular films. | 02-03-2011 |
| 20100007043 | Multi-Tube Extrusion Apparatus and Method - A method and apparatus for producing a plurality of bi-oriented, heat-shrinkable thermoplastic tubular films is disclosed. Thermoplastic resin is extruded through a plurality of annular dies to form a plurality of molten plastic tubes. The tubes are cooled and solidified and sent through a plurality of pinch rollers to stretch the tubes simultaneously in a machine and transverse direction, creating a plurality of tubular films. The films are cooled and heated, and then relaxed simultaneously in a machine and transverse direction. Winding rollers then wind up the finished tubular films. | 01-14-2010 |
| 20090029079 | Nylon Food Casing - Tubular, biaxially stretched, heat shrinkable seven layer film food casings comprising inner polyamide layer and two outer polyamide or functional group modified polyolefin layers on either side of core layers of EVOH and polyethylene, having two adhesive layers, and a coextrusion process for making the film. | 01-29-2009 |
