Embossed rug cushion and method of producing the same

Claim 1

A METHOD OF EMBOSSING A RUG CUSHION OF A RELATIVELY THICK, COMPRESSIBLE AND FORAMINOUS SHEET OF MATTED FIBERS, COMPRISING THE STEPS OF FORMING UPON ONE SURFACE OF THE SHEET A SUBSTANTIALLY UNIFORMLY APPLIED DEPOSIT OF STARCHY MATERIAL IN AN AMOUNT WHICH IS EFFECTIVE TO COAT THE FIBRES ON THOSE SURFACES THEREOF WHICH ARE EXPOSED IN PLAIN VIEW OF SAID ONE SURFACE AND TO EXTEND INTO THE FORAMINA BETWEEN THE SURFACE FIBRES TO PARTIALLY COAT AT LEAST SOME OF THOSE FIBRES WHICH ARE DISPOSED IMMEDIATELY BELOW THE SURFACE FIBRES, THEREAFTER COMPACTING THE FIBRES TRANSVERSELY OF THE SHEET THROUGHOUT PREDETERMINED SPACED APART AREAS TO FORM ALTERNATE ELEVATION AND DEPRESSION AREAS IN SAID ONE SURFACE AND TO MAKE THE OUTSIDE SURFACE OF SAID DEPOSIT SMOOTHER IN AND THROUGHOUT THE DEPRESSION AREAS THAN IN AND THROUGHOUT THE ELEVATION AREAS, AND WHEREBY THE FIBRES WHICH ARE DISPOSED IMMEDIATELY BELOW THE SURFACE FIBRES IN THE ELEVATION AREAS WILL HAVE ON THEM AN AMOUNT OF SAID DEPISIT WHICH IS SUBSTANTIALLY EQUAL TO THAT ON THEIR CORRESPONDING FIBRES IN THE DEPRESSION AREAS, THEREAFTER COATING THE OUTSIDE SURFACE OF SAID DEPOSIT WITH SUBSTANTIALLY UNIFORMALLY APPLIED COAT OF POLYMERIC PLASTIC MATERIAL IN AN AMOUNT WHICH IS EFFECTIVE TO COAT THE OUTSIDE SURFACE OF SAID DEPISIT AND YET LEAVE THE SURFACE OF THE COATED SHEET APPRECIABLY FORAMINOUS, AND SETTING SAID POLYMERIC PLASTIC, WHEREBY THE FIBRES WHICH ARE DISPOSED IMMEDIATELY BELOW THE SURFACE FIBRES IN THE ELEVATION AREAS WILL HAVE MORE OF SAID PLASTIC MATERIAL ON THEM THAN THEIR CORRESPONDING FIBRES IN THE DEPRESSION AREAS, AND THE FIBRES IN AND ADJACENT THE SURFACE OF THE DEPRESSION AREAS WILL BE MORE CLOSELY ADHERED TO ONE ANOTHER WITH SAID STARCHY MATERIAL AND SAID PLASTIC MATERIAL THAN THEIR CORRESPONDING FIBRES IN THE ELEVATION AREAS.