Xerographic microfilm enlarger

Claim 1

APPARATUS TO PROJECT MICROFILM AT AN INCREASED MAGNIFICATION RATIO ONTO A PREVIOUSLY REMOVEDLY CHARGED FLAT XEROGRAPHIC PLATE, INCLUDING IN COMBINATION A PROJECTION SYSTEM, SAID PROJECTION SYSTEM INCLUDING IN OPERATIVE RELATION LAMP MEANS ADAPTED TO BE CONNECTED TO A POTENTIAL SOURCE, A CONDENSER LENS, FILM SUPPORT MEANS CLOSELY SPACED AND INTEGRALLY COUPLED TO SAID CONDENSER LENS AND ARRANGED TO SUPPORT MICROFILM TO BE REPRODUCED IN A PROJECTION PLANE, SAID FILM SUPPORT MEANS INCLUDING A FILM HOLDING MEMBER REMOVABLY INTERCHANGEABLE THEREIN FOR HOLDING FILM OF DIFFERENT SIZES OR MOUNTS, PARALLEL SPACED CLOSURE MEANS OPERABLE TO SLIDEABLY RECEIVE SAID FILM HOLDING MEANS THEREBETWEEN AND SECURE THE FILM THEREAT IN THE PROJECTION PLANE, AND MEANS TO OPERATE SAID CLOSURE MEANS TO EFFECT SEPARATION AND CLOSURE THEREOF WHEREBY TO RECEIVE AND SECURE RESPECTIVELY A FILM HOLDER CONTAINING FILM TO BE REPRODUCED, AND AN ADJUSTABLE OBJECTIVE LENS CAPABLE OF BEING FOCUSED TO FILM IN THE FILM SUPPORT MEANS; A BOXLIKE ENCLOSURE HAVING XEROGRAPHIC PLATE HOLDING MEANS ARRANGED TO RECEIVE AND SUPPORT A PREVIOUSLY REMOVEDLY CHARGED FLAT XEROGRAPHIC PLATE IN A HORIZONTAL PLANE AND IN LIGHT-TIGHT RELATION TO THE INTERIOR OF SAID ENCLOSURE, AN EXTENSIBLE BELLOWS SECURED BETWEEN THE ENCLOSURE AND SAID PROJECTION SYSTEM TO PROVIDE AN EXTENSIBLE LIGHT-TIGHT ENCLOSURE THEREBETWEEN, AND A REFLECTIVE SURFACE MEMBER SECURED WITHIN SAID ENCLOSURE AND ARRANGED TO REFLECT AN IMAGE PROJECTED FROM SAID PROJECTION SYSTEM NORMALLY ONTO A XEROGRAPHIC PLATE IN THE PLATE HOLDING MEANS.