Patent ID: 7293594

Claim:
An apparatus for the continuous production of sandwich elements containing (i) an upper outer layer, (ii) a lower outer layer and (iii) a layer of cellular reactive plastics material lying between and securely joined to (i) and (ii) comprising: (a) a circulating upper belt for guiding (i), (b) a circulating lower belt for guiding (ii), (c) a feed device for (i), (d) a feed device for (ii), (e) a device for cutting the sandwich elements, (f) a mix head for applying reactive mixture to (ii), (g) a metering device for metering each reactive component, (h) lines between the metering device and the mix head for conveying reactive component to the mix head and (i) at least one guide element arranged between and extending over the width of (i) and (ii) positioned at a point such that cellular plastics-forming material is creamy before reaching the guide element and at a height, length and angle to cause a bow wave to form.