File for non-punched papers

Claim 1

A FILE ADAPTED TO HOLD A PLURALITY OF SUPERPOSED PAPER SHEETS WITHOUT PERFORATING THE SHEETS, COMPRISING, IN COMBINATION, A REVERTED SHEET-METAL CLIP FORMED TO PROVIDE A PAIR OF LEGS HAVING CONFRONTING FACES SPACED BY A RESILIENT BIGHT, ONE OF SAID LEGS HAVING A PROJECTION ON THE CONFRONTING FACE THEREOF ADJACENT ITS FREE END; A FILE SHEET COMPRISED OF A BACK SHEET HAVING A FIRST REVERTED PORTION EXTENDING FORWARDLY THEREOVER, A SECOND REVERTED PORTION EXTENDING REARWARDLY TOWARD THE FOLD LINE OF SAID FIRST REVERTED PORTION, AND A THIRD REVERTED PORTION EXTENDING FORWARDLY OF SAID SECOND REVERTED PORTION, SAID THIRD REVERTED PORTION FORMING A STOP, SAID SHEET HAVING A LONGITUDINAL SLOT FORMED ALONG A FOLD LINE ADJACENT ITS EDGE, SAID ONE OF SAID LEGS OF SAID CLIP EXTENDING THROUGH SAID SLOT WITH THE OTHER OF SAID LEGS POSITIONED EXTERIORLY AND REARWARDLY OF SAID BACK SHEET; SAID CLIP SLIDING TRANSVERSELY OF THE FOLD LINES OF SAID BACK SHEET WITH THE ENGAGEMENT OF SAID PROJECTION AND SAID STOP PRECLUDING MOVEMENT OF SAID ONE LEG OUT OF SAID SLOT, WHEREBY WHEN THE PAPER SHEETS ARE INSERTED BETWEEN SAID BACK SHEET AND SAID FIRST REVERTED PORTION WITH SAID CLIP WITHDRAWN FROM SAID SLOT, MOVEMENT OF SAID CLIP TOWARD SAID SHEETS UNTIL SAID BIGHT ENGAGES THE EDGE OF SAID BACK SHEET CLAMPS THE SHEETS BETWEEN THE EDGE OF SAID BACK SHEET AND SAID FIRST REVERTED PORTION.