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US 3,939,235 AGranted
Process for continuous production of thin polyurethane foam layers
AssigneeSerpo
InventorWilly F. Poppe
Life of this patent
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Abstract
The invention pertains to a process for the continuous production of thin polyurethane foam layers, in which a band-like supporting layer is moved longitudinally and locally guided so as to take a nearly cylindrical shape, the axis of which is horizontal and perpendicular to the general direction of the band motion, and a reacting mixture is projected on the supporting layer by means of a vertical, rotating projection disk, reciprocating along the axis of the said cylindrical shape.
Claims4
Process for the continuous production of polyurethane foam layers comprising the steps of:
- a. moving a band-like supporting layer longitudinally;
- b. guiding said moving supporting layer at a particular location so as to form a section having a substantially cylindrical shape, the axis of said cylindrically shaped section being horizontal and being perpendicular to the direction of travel of said supporting layer;
- c. rotating a disk within said cylindrically shaped section of said moving supporting layer;
- and simultaneously
- d. projecting a foamable polyurethane reaction mixture on said moving supporting layer of said cylindrically shaped section;
- and simultaneously
- e. reciprocally moving said rotating disk first in one direction and then in the opposite direction along said axis.
4 more elements
Dependencies are inferred from the claim text.