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US 4,209,557 AGranted
Process for coating a web
AssigneeImperial Chemical Industries PLC
InventorHarry Edwards
Life of this patent
Estimating the term…
Abstract
Process for coating a web using a liquid dispenser in which a spray head attached to a reciprocating carriage is permitted limited free movement relative to the carriage and transversely to a direction of advancement of web or sheet material, onto which the liquid is to be dispensed, when the carriage is decelerated prior to reversal of its direction of motion. Useful for backing carpets with foamable compositions at high speed.
Claims3
Process for dispensing a liquid reaction mixture onto web or sheet material which comprises:
- (a) advancing web or sheet material in a first line of motion;
- (b) feeding a supply of liquid reaction mixture to a distributor attached to a carriage which is drivably mounted for reciprocation in a second line of motion transverse to the first line of motion of the sheet or web material;
- (c) depositing the liquid reaction mixture on the web or sheet material from the distributor while the carriage is reciprocated;
- and
- (d) thereafter allowing the mixture to react, the distributor being allowed to move freely relative to the carriage and transversely to the direction of advancement of the web or sheet material while the carriage is decelerated prior to reversal of its direction of motion.
2 more elements
Dependencies are inferred from the claim text.