Feeding apparatus for lifts of limp sheets

Claim 1

APPARATUS FOR FEEDING LIFTS OF PAPER SHEETS TO AN AUTOMATIC PAPER PUNCHING MACHINE AND FOR REGISTERING SAID LIFTS RELATIVE TO THE PUNCHES, SIDE EDGE GAUGE AND BED OF SAID MACHINE, SAID APPARATUS COMPRISING FRAME MEANS SUPPORTING SAID MACHINE IN TILTED POSITION FOR REGISTERING A LIFT ON SAID BED AGAINST SAID SIDE EDGE GAUGE BY GRAVITY; A PAIR OF LATERALLY SPACED, ENDLESS CHAINS MOUNTED ON SAID FRAME MEANS, SAID CHAINS HAVING A PARALLEL WORKING STRETCHES EXTENDING IN A PLANE NORMAL TO SAID SIDE EDGE GAUGE FROM A LIFT DEPOSIT STATION, ACROSS THE PUNCH BED OF SAID MACHINE TO LIFT DISCHARGE STATION AND HAVING A PLURALITY OF PAIRS OF LIFT ADVANCING LUGS SPACED THEREAROUND, EACH PAIR DEFINING A TRANSVERSE LINE NORMAL TO SAID SIDE EDGE GAUGE ON SAID STRETCH FOR ENGAGING THE TRAILING EDGE OF A LIFT; INTERMITTENT DRIVE MEANS ADVANCING SAID CONVEYOR WORKING STRETCHES UNIDIRECTIONALLY FROM SAID DEPOSIT STATION ACROSS SAID PUNCH BED TO SID DISCHARGE STATION AND PERIODICALLY HALTING EACH SUCCESSIVE PAIR OF TRANSVERSELY ALIGNED LUGS ON SAID BED WITH THE TRAILING EDGE OF THE LIFT ENGAGED THEREBY NORMAL TO SAID SIDE GAUGE AND THE LIFT IN EXACT REGISTRATION WITH SAID PUNCHES; POSITIVE STOP MECHANISM ASSOCIATED WITH SID INTERMITTENT DRIVE MEANS, FOR POSITIVELY HALTING EACH SUCCESSIVE PAIR OF LUGS IN EXACT REGISTRATION ON SAID BED; AND ELECTRIC CONTROL CIRCUIT MEANS, INCLUDING A SWITCH CLOSED BY THE ACTUATION OF SAID POSITIVE STOP MECHANISM FOR ACTUATING THE PUNCHES OF SAID MACHINE DURING THE PERIODIC HALTS OF SAID CONVEYOR MEANS.