Ultrasonically welded mat unit and system thereof

An omnidirectional mat cleaning system comprising:

• at least one single mat unit including a plurality of longitudinally extending ribs formed in first and third quadrants of an upper first layer having four quadrants defining gaps therebetween and a plurality of transversely extending ribs formed in the first and third quadrants of a lower second layer defining gaps therebetween such that the gaps are in open communication to permit debris to fall entirely through both gaps to pass completely through the at least one single mat unit;
• wherein the at least one single mat unit is installed on a floor adjacent a door opening defined by a building structure;
• a first direction of travel above the at least one single mat unit extending through the door opening;
• a different second direction of travel above the at least one mat single unit extending through the door opening or another door opening defined by the building structure;
• wherein the single mat unit cleans debris from shoes regardless of the direction of travel above the at least one single mat unit;
• and
• wherein the at least one single mat unit further includes:
• a contact point wherein the upper first layer contacts the lower second layer;
• the four quadrants including a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant;
• a plurality of longitudinal ribs integrally formed in the first layer positioned in the first and third quadrants and the plurality of longitudinal ribs in the first layer are spaced apart to define longitudinal gaps therebetween entirely vertical through the first layer, and a plurality of transverse ribs integrally formed in the first layer positioned in the second and fourth quadrants;
• a plurality of longitudinal ribs integrally formed in the second layer positioned in the second and fourth quadrants, and a plurality of transverse ribs integrally formed in the second layer positioned in the first and third quadrants and the plurality of transverse ribs in the second layer are spaced apart to define transverse gaps therebetween entirely vertical through the second layer;
• wherein the longitudinal gaps defined by the first layer are in open communication with the transverse gaps defined by the second layer so as to permit debris to fall entirely through both gaps to pass completely through the mat;
• and
• wherein the upper first layer and the lower second layer are formed from a non-vinyl nontoxic thermoplastic elastomer (TPE) material.