Abstract: An imaging apparatus and an improved exit device are provided for guiding a substrate bearing an at least partly deformable image upon exit of the substrate from an image impression region on an image impression surface of an imaging system. The exit device includes an exit roller urged against the image impression surface.

Abstract: Apparatus for dispensing liquid toner concentrate including a container containing liquid toner concentrate, mounting apparatus operative to secure the container while allowing for axial movement of the container and air pressure apparatus for causing axial movement of the container and movement of a movable partition in the canister to aid in selective dispensing of the liquid toner concentrate from the container.

Abstract: Apparatus for dispensing liquid toner concentrate including a container containing liquid toner concentrate, mounting apparatus operative to secure the container while allowing for axial movement of the container and air pressure apparatus for causing axial movement of the container and selective dispensing of the liquid toner concentrate from the container.

Abstract: Imaging apparatus for duplex printing on a substrate having first and second sides and a leading edge and a trailing edge, the imaging apparatus including a first member having an image support surface adapted to sequentially support first and second images thereon, a second member adapted to support the substrate such that one side of the substrate engages the image support surface, leading edge first, at a transfer region and transfer apparatus for transferring the first image from the image support surface to the first side of the substrate at the transfer region while at least partially fixing the image thereto. The imaging apparatus also includes a waiting station adjacent the second member for receiving the substrate after transfer of the first image thereto and prior to the transfer of the second image thereto and an output station for receiving the substrate after completion of image transfer thereto.

Abstract: Imaging apparatus including a photoreceptor, a charging station operative to charge the photoreceptor including an active length of corona wire operatively juxtaposed with the photoreceptor and a corona wire dispenser containing an undispensed length of corona wire contiguous with the active length and at least as long as the active length. The apparatus also includes an exposure station operative to selectively discharge portions of the photoreceptor to form a latent image thereon and a developer operative to develop the latent image. The corona wire dispenser is operative to dispense an appropriate length of the undispensed corona wire to replace the active length of corona wire.

Abstract: Apparatus for registering a copy sheet prior to feeding the sheet to the image-transfer station of an electrophotographic copier. Opposing pairs of relatively rigid feed rollers are arranged on shafts in alternating relationship with opposing pairs of relatively compliant feed rollers, which are of somewhat larger diameter than the rigid rollers so as to form nips of appreciably greater extent in the direction of feed. Registration gates mounted for rotation on one of the roller shafts through slipping couplings are selectively restrained against rotation with the roller shaft either in a non-blocking position out of the feed path or in a blocking position within the nip area of the compliant rollers but upstream of the nip area of the rigid rollers.

Abstract: An apparatus which develops a latent image recorded on a generally planar photoconductive member moving in a direction at least partially inclined with respect to the gravitational force exerted thereon. The latent image is developed with a liquid developer material in an extended development zone substantially parallel to the photoconductive member. The liquid developer material is pumped partially upwardly from the lowermost region of the development zone toward the uppermost region thereof. This forms a pressure barrier preventing the escape of liquid developer material from the lowermost region of the development zone. A sealing roller prevents the escape of liquid developer material from the uppermost region of the development zone.

Abstract: An optical scanning system for a variable-magnification electrophotographic copier includes a first scanning carriage reciprocated along a path by endless bands attached to the carriage at transversely spaced locations and driven purely by friction. Pulleys mounted on a second scanning carriage at transversely spaced locations roll between the drive bands and stationary guides to move the second carriage at half the speed of the first carriage. The second carriage may be shifted relative to the first carriage by moving it to a location at which arms lift the pulleys from the guides. A flywheel rotating at the desired scanning speed is coupled to the scanner drive train after the drive train has been smoothly accelerated to the desired scanning speed, and is uncoupled from the scanner drive train before the drive train is decelerated at the end of the scanning stroke.

Abstract: Apparatus for registering a copy sheet prior to feeding the sheet to the image-transfer station of an electrophotographic copier. Opposing pairs of relatively rigid feed rollers are arranged on shafts in alternating relationship with opposing pairs of relatively compliant feed rollers, which are of somewhat larger diameter than the rigid rollers so as to form nips of appreciably greater extent in the direction of feed. Registration gates mounted for rotation on one of the roller shafts through slipping couplings are selectively restrained against rotation with the roller shaft either in a non-blocking position out of the feed path or in a blocking position within the nip area of the compliant rollers but upstream of the nip area of the rigid rollers.

Abstract: A liquid developed electrophotocopier wherein liquid carrier dispersant transferred to a copy sheet concomitantly with the developed image is catalytically oxidized to provide harmless gaseous oxidation products at temperatures sufficiently elevated to vaporize transferred carrier and to dry and fix the transferred image. The catalytic fixer-dryer is brought rapidly to operating temperature by injecting an atomized spray of carrier liquid. The carrier liquid has a low auto-oxidation temperature; and the fixer-dryer is operated above such temperature to ensure complete oxidation of carrier vapors even though the catalyst may have been largely rendered inactive.

Abstract: An automatic biasing mechanism for a paper cassette support plate for use in an electrophotographic copier in which a removable paper cassette is provided with a plate upon which a supply of copy sheets is placed. A feed roller assembly within the copier is adapted to remove the uppermost sheets of paper from the cassette and activate a sensor when the top of the stack of sheets falls below a predetermined level. The sensor provides an output energizing a motor to rotate a shaft having a roller adapted to pivot the plate to move the stack of sheets to a position at which the uppermost sheet engages the feed roller assembly. The shaft, normally biased so as not to be in driven engagement with the motor, is moved into operative relationship with the motor by the cassette upon its insertion in the copier.