Card support

Claim 1

A CARD SUPPORT, COMPRISING A BOX-SHAPED HOUSING INCLUDING A FIRST BOTTOM WALL HAVING AN UPPER SIDE, AND PAIRS OF UPSTANDING SIDE AND END WALLS OF WHICH THE LATTER ARE EACH PROVIDED WITH A CUT OUT, A FRAME FIXEDLY RECEIVED IN SAID HOUSING AND INCLUDING A PAIR OF UPSTANDING SIDE PANELS AND AT LEAST TWO UPSTANDING END PANELS FIXEDLY SECURED TO SAID SIDE PANELS AND EACH BEING PANELS BEING ONE OF SAID END WALLS, ONE OF SAID END PANELS BEING SPACED FROM AND DEFINING A GAP WITH THE ASSOCIATED END WALL, EACH OF SAID END PANELS HAVING EQUIDISTANT PARALLEL ROWS OF PERFORATIONS IN REGISTRY WITH THE CUT OUT OF THE RESPECTIVE END WALL AND EACH THEREOF HAVING AN OUTER SIDE PROVIDED WITH CORRUGATIONS PARALLEL WITH SAID ROWS OF PERFORATIONS AND DEFINING WAVES WHOSE CRESTS ARE SEPARATED FROM EACH OTHER BY DISTANCES CORRESPONDING TO DISTANCES BETWEEN ADJOINING ROWS OF PERFORATIONS, SAID ROWS OF PERFORATIONS BEING RESPECTIVELY LOCATED IN SAID WAVES AND PENETRATING SAID CRESTS THEREOF SO THAT A SELECTOR NEEDLE TO BE INSERTED INTO THE PERFORATIONS IS POSITIVELY GUIDED THEREINTO BY THE WALLS BOUNDING THE RESPECTIVE WAVE; A SECOND BOTTOM WALL DISPOSED IN SAID HOUSING BENEATH SAID END PANELS AND HAVING AN UNDERSIDE FACING THE UPPER SIDE OF SAID FIRST BOTTOM WALL, SAID SECOND BOTTOM WALL BEING SLIDABLE BETWEEN TWO POSITIONS RELATIVE TO SAID FIRST BOTTOM WALL AND ONE OF SAID BOTTOM