Line find mechanism

Claim 1

IN A MACHINE FOR STOPPING A SHEET AT A POSITION CORRESPONDING TO THE LOCATION OF A LINE DESIGNATING PERFORATION IN THE SHEET COMPRISING A SINUOUS SHEET GUIDEWAY HAVING A PAIR OF VERTICALLY SPACED APART BENDS ALONG ONE SIDE OF THE PATH OF SHEET TRAVEL AND OFFSET FROM AND BY A DISTANCE SUBSTANTIALLY EQUAL TO THE WIDTH OF THE GUIDEWAY, AN UPPER SHEET STOPPING ARM FOR ENGAGEMENT BY AN EDGE OF THE SHEET PERFORATION, A LOWER SHEET OPERATED ARM FOR ENGAGEMENT BY THE LEADING EDGE OF A SHEET, SAID ARMS CONNECTED FOR MOVEMENT TOGETHER ALONG THE PATH OF SHEET TRAVEL AND SPACED APART A DISTANCE SUBSTANTIALLY EQUAL TO ONE-HALF THE DISTANCE BETWEEN SAID BENDS, SAID ARMS HAVING AN UPPER POSITION WITH THE UPPER ARM WITHOUT SAID GUIDEWAY AT THE UPPER BEND AND THE LOWER ARM WITHIN SAID GUIDEWAY INTERMEDIATE SAID BENDS, AND MEANS LIMITING MOVEMENT OF SAID ARMS TO A SECOND POSITION WITH THE UPPER ARM WITHIN SAID GUIDEWAY INTERMEDIATE SAID BENDS AND THE LOWER ARM WITHOUT SAID GUIDEWAY AT THE LOWER BEND.