Abstract: A spooled photosensitive web cartridge and a spooled photosensitive web cassette are disclosed.The web cartridge includes a cylindrical core, a pair of end caps, a length of photosensitive material, and a leader sheet. The end caps are disposed coaxially on the core at an axial distance between each other. The photosensitive material is wound onto the core to form a cylindrical web between the end caps. The leader sheet is secured to the leading end of the photosensitive material, and includes an opaque wider portion circumferentially disposed entirely around the web to form a tubular enclosure. The wider portion of the leader sheet has a width greater than the axial distance between the end caps. The opposite side edges of the wider portion are detachably connected respectively to the end caps so as to mechanically retain the tubular enclosure on the end caps as well as to provide a light-tight seal between the tubular enclosure and the end caps.

Abstract: A cylithographic copying apparatus includes a coil comprising continuous webs if imaging sheet and intermediate developer sheet formed in a spiral having alternating layers of imaging and intermediate developer sheet. The laminate formed of imaging and intermediate developer sheet is payed out from the coil past a developer station, where it is image-wise exposed, and through pressure rollers which form an image on the intermediate developer sheet. The intermediate developer sheet is conveyed to an assembling station where the imaged developer layer is transferred to a sheet of plain paper. In a preferred embodiment, the imaging sheet includes a support of polyethylene terephthalate (PET) and the intermediate developer sheet includes a substrate of aluminized PET. The coil preferably is rotatably mounted within a cassette which also includes a take-up spool for the spent imaging sheet; the cassette is easily insertable and removable from the copier housing.