Method for continuously extruding and depositing an unbroken layer of mortar on a work surface or substrate

A method for continuously extruding and depositing or applying an unbroken layer of a mortar upon a selected work surface or substrate, comprising:

• (a) providing a mortar gun assembly which includes a chamber for receiving at an inlet end mortar from a remote supply hopper and an extruder at an outlet end, the extruder being configured to apply a continuous, unbroken layer, bead or ribbon of mortar of selected thickness upon the selected work surface or substrate;
• said hopper being supported separately from said chamber so as not to add weight to the chamber which the user must carry and manipulate during use and securing a handle to the top of the chamber to allow a user to position and manipulate the mortar gun without supporting the weight of the hopper;
• (b) providing a manually operated on/off switch on the handle for controlling a mortar pump to provide mortar from the hopper under pressure;
• (c) connecting a rotating port valve between the hopper and the mortar gun assembly's chamber;
• wherein said rotating port valve is controllable to provide a rest state for said rotating valve in which the mortar does not flow to the mortar gun, but is instead re-circulated by the pump back to the hopper so it is kept moving and does not begin to dry or set, and provides an active state in which mortar is pumped from the supply hopper to the mortar gun to be extruded out onto the selected work surface or substrate;
• (d) switching said valve to said rest state to recirculate said mortar to said hopper and leaving said valve in said rest state until said mortar gun is brought to the selected work surface or substrate;
• (e) placing said mortar gun assembly onto the selected work surface or substrate;
• and
• (f) switching said valve to said active state to continuously dispense mortar from said extruder while moving said mortar gun assembly along the selected work surface or substrate.