Patent ID: 9439364
Filing Date: 2016-09-13
CPC Classification: A01G,B29C

Claim Text:
1. A method for forming extruded plastic material into a strip that may be formed into an irrigation pipe, the method comprising: providing a pair of juxtaposed rollers, a roller of the pair of rollers including a mold of a pattern; and cooling the pair of juxtaposed rollers while passing the extruded plastic material between the pair of juxtaposed rollers and while maintaining the linear velocity of a contact surface of one of the rollers of the pair of rollers different from the linear velocity of a contact surface of the other roller of the pair of rollers, such that the extruded material that passes between the rollers is concurrently stretched and pressed between the pair of rollers so as to flatten the extruded material as the extruded material is concurrently cooled by the rollers and as the pattern is concurrently impressed on the extruded material so as to produce a strip with an undistorted pattern that is suitable for formation into the irrigation pipe.