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Claim 1

A CONTAINER AND COVER, EAHC OF WHICH IS VACUUM FORMED FROM A FLEXIBLE SHEET OF RESILIENT THERMOPLASTIC RESIN, SAID CONTAINER BEING OF SUBSTANTIALLY UNIFORM THICKNESS AND COMPRISING: (A) A BOTTOM; (B) WALL PORTIONS INTEGRAL WITH SAID BOTTOM AND EXTENDING UPWARD THEREFROM; (C) SAID WALL PORTIONS BEING OUTWARDLY OFFSET TO PROVIDE A LEDGE AROUND THE PERIPHERY OF SAID CONTAINER, SAID LEDGE BEING SPACED FROM SAID BOTTOM TO PROVIDE A CHAMBER BETWEEN SAID BOTTOM AND SAID ELEMENT; (D) A GENERALLY PLANE AND RIGID PRINTED CIRCUIT WIRING BOARD DISPOSED ON SAID LEDGE, SAID WIRING BOARD HAVING COMPONENTS EXTENDING INTO SAID CHAMBER; (E) SAID WALL PORTIONS EXTENDING UPWARD FROM SAID LEGE AND OUTWARD TO FORM A CO-PLANAR UPPER EDGE OF SAID CONTAINER; AND (F) SAID WALL PORTIONS EXTENDING DOWNWARD AND INWARD FROM SAID UPPER EDGE PORTION TO FORM A RIM SURROUNDING THE UPPER PERIPHERY OF SAID CONTAINER; SAID COVER BEING OF SUBSTANTIALLY UNIFORM THICKNESS AND COMPRISING: (G) A GENERALLY FLAT TOP PORTION ADAPTED TO EXTEND ACROSS THE OPEN TOP OF SAID CONTAINER; (H) A DOWNWARDLY EXTENDING FLANGE AROUND THE PERIPHERY OF SAID COVER ADAPTED FOR CLOSELY ENGAGING SAID DOWNWARDLY EXTENDING WALL PORTIONS OF SAID CONTAINER FOR AN INTERFERENCE FIT THEREWITH; AND (I) A DOWNWARDLY EXTENDING CHANNEL SPACED FROM THE PERIPHERY OF SAID COVER AND EXTENDING TO ADJACENT SAID LEDGE WHEN SAID COVER IS IN PLACE ON SAID CONTAINER FOR HOLDING SAID ELEMENT IN A STORED POSITION ON SAID LEDGE.