Electrically actuated, automatic suction door-mat

Claim 1

IN A DOOR-MAT, A SUPPORT OF ELASTICALLY YIELDABLE MATERIAL COMPRISING A FIRST AND A SECOND LAYER OF SAID MATERIAL DISCONNECTABLE FROM ONE ANOTHER, RESTRAINED CONNECTION MEANS BETWEEN SAID TWO LAYERS, INCLUDING AN EDGE ON THE FIRST ONE OF SAID LAYERS, SEATING INTO A GROOVE IN SAID SECOND LAYER TO RESTRAIN MOVEMENT OF THE FIRST LAYER RELATIVE TO THE SECOND OF SAID LAYERS, A PLURALITY OF METAL TUBES ARRANGED IN PARALLEL ROW SIDE BY SIDE AND EMBEDDED IN SAID FIRST LAYER SO AS TO PROTRUDE FROM ONE FACE THEREOF, A PLURALITY OF GROOVES IN SAID FIRST LAYER, EACH IN REGISTER WITH A CORRESPONDING ONE OF SAID ROWS OF TUBES, EACH OF WHICH GROOVES IS FORMED WITH AN ELONGATED SLIT FOR COMMUNICATION BETWEEN THE EMBEDDED END OF THE TUBES OF ONE ROW AND A CORRESPONDING GROOVE, A PLURALITY OF GROOVES IN SAID SECOND LAYER, DISPOSED IN REGISTER WITH THE GROOVES IN SAID FIRST LAYER SO AS TO FORM THEREWITH A PLURALITY OF CHANNELS WITH CLOSED CONTOUR WHEN SAID TWO LAYERS, ARE SUPERMIPOSED AND CONNECTED TO ONE ANOTHER, ELECTRICALLY OPERATED SUCTION MEANS AND A CONNECTION DUCT BETWEEN SAID SUCTION MEANS AND SAID PLURALITY OF CHANNELS.