Method for making vibratory separator screens

A method for making a screen assembly for a vibratory separator for treating fluid containing liquid, the method comprising

• placing at least two layers of screening material below a glue application apparatus for applying heated initially flowable hot melt glue, the at least two layers including at least a first layer and a second layer, the first layer of screening material made of metal, and comprising a first metal mesh through which liquid in the fluid is passable and having a first metal mesh pattern,
• the first layer of screening material removably wound onto a first rotatable roll,
• unrolling a first part of the first layer of screening material, wherein the first part is made of metal wire in a metal mesh pattern extending across the first part, from the first roll and positioning said first part of the first layer below the glue application apparatus, the first part of the first layer of screening material having a top surface with a length and a width,
• applying with the glue apparatus an amount of heated hot melt glue in a pattern to the top surface of the first part of the first layer of screening material, the pattern comprising continuous lines of glue extending across the length and the width of the top surface and the pattern of glue being different from the first metal mesh pattern,
• wherein the second layer of screening material is removably wound onto a second roll, the second layer of screening material made of metal and comprising a second metal mesh through which liquid in the fluid is passable, the method further comprising
• unrolling part of the second layer from the second roll, said part comprising a second part and positioning the second part of the second layer adjacent the first part of the first layer to which glue has been applied gluing together the first part and the second part, and
• moving the second part of the second layer and the first part of the first layer between opposed rotatable spaced-apart rollers to press together the second part of the second layer and the first part of the first layer to form a pressed together layer of screening material,
• cooling said glue in the pressed together layer of screening material, and
• cutting the pressed together layer of screening material to form a sub-sheet of cooled pressed together screening material,
• attaching a metal support to the sub-sheet of cooled pressed together screening material, the metal support for supporting the sub-sheet so that the metal support and the cooled sub-sheet together form a screen assembly for a vibratory separator, the metal support an integral metal support structure for the screen assembly.