Sheet handling apparatus

Claim 1

A DEVELOPING MACHINE FOR PHOTOGRAPHIC PRINTS COMPRISING A MAIN ROLLER TO BE HEATED AND HAVING HEATING MEANS ASSOCIATED THEREWITH INCLUDING AN ELONGATED ELECTRICAL RESISTANCE HEATER CARTRIDGE INSERTED REMOVABLY AS A UNIT INTO SAID MAIN ROLLER, SAID CARTRIDGE BEING SUPPORTED IN A METALLIC BLOCK FOR HEATING THE SAME, A THERMOSTAT SWITCH IN THERMAL CONTACT WITH SAID BLOCK TO SENSE THE TEMPERATURE THEREOF AND EFFECTIVE TO CONTROL SAID HEATER CARTRIDGE, MEANS TO ROTATE THE MAIN ROLLER, A PLURALITY OF GUIDE ROLLERS ADJACENT THE MAIN ROLLER, A GUIDE BAND TRAINED AROUND THE GUIDE ROLLERS AND EFFECTIVE TO PRESS AGAINST THE MAIN ROLLER A PHOTOGRAPHIC NEGATIVE ADVANCED INTO THE BIGHT BETWEEN THE MAIN ROLLER AND THE GUIDE BAND, MEANS TO ADJUST ONE OF SAID GUIDE ROLLERS THEREBY TO VARY THE TENSION OF THE GUIDE BAND, AND A MULTIPLE PART HOUSING FOR THE MACHINE INCLUDING A COVER, A SEPARATE TOP GUIDE FORMED FROM A STAMPING AFFIXED TO THE COVER AND AFFORDING A GUIDE THROAT DIRECTED TOWARD THE ENTRANCE BIGHT BETWEEN THE MAIN ROLL AND THE GUIDE BAND, AND A SEPARATE BOTTOM GUIDE FORMED FROM A STAMPING AFFIXED TO THE COVER AND AFFORDING A GUIDE LEDGE EXTENDING TO THE FRONT OF THE MACHINE FROM THE EXIT BIGHT BETWEEN THE MAIN ROLL AND THE GUIDE BAND.