Liquid dispenser and process for dispensing liquid reaction mixtures onto web or sheet material.

摘要

The invention relates especially to foam-backed carpets and to the provision of a foam backing of even thickness. A liquid dispenser is provided in which a spray head (10) attached to a reciprocating carriage (14) is permitted limited free movement relative to the carriage and transversely to a direction of advancement of web or sheet material (18), onto which the liquid is to be dispensed, when the carriage (14) is decelerated prior to reversal of its direction of motion. It can be used for backing carpets with foamable compositions at high speed. The invention also includes a process for dispensing liquids onto web or sheet material.