| 摘要 |
The invention relates to apparatus for making a heat-insulated structural section assembly for use in window and door frames consisting of at least two structural metal sections transversely connected to each other by at least one heat-insulating bar and including at least one pressure roller which is adapted to apply pressure against a flange on the structural section in order to hold the heat-insulating bar firmly in place. The improvement resides in the provision of oblique, parallel grooves in the peripheral surfaces of said pressure roller, oriented at an acute angle to the direction of rotation of the pressure roller. |
