Abstract: There is disclosed a chuck assembly for internally holding a hollow substrate having an open end including: (a) a body including an end section having a width narrower than that of the inner width of the substrate to permit insertion of the end section through the substrate open end into the substrate interior; and (b) a compressible spring coiled around a portion of the end section, wherein prior to compression the spring has an outer width larger than that of the inner width of the substrate, wherein upon insertion of the end section of the body into the substrate the spring is compressed by contact with the substrate inner surface resulting in the chuck assembly holding the substrate by the force generated against the substrate inner surface by the spring in opposition to the compression.

Abstract: There is disclosed a substrate reclaim method comprising directing laser energy at a coating covering a part of an outer surface of a substrate, wherein the outer surface has a shiny finish, thereby removing with the laser energy all of the coating on the outer surface and etching with the laser energy a portion of the outer surface to change the etched outer surface portion from a shiny finish to a matte finish.

Abstract: A laser ablation apparatus includes a nozzle, disposed through a housing, wherein the nozzle has: (i) a nozzle housing comprised of a bottom surface; (ii) a first orifice defined by the bottom surface; (iii) a second orifice defined by the bottom surface; (iv) a first passageway defined by the nozzle housing in communication with the first orifice; and (v) a second passageway defined by the nozzle housing in communication with the second orifice, wherein the portion of the second passageway adjacent the second orifice forms an angle .theta..sub.3 with the portion of the first passageway adjacent the first orifice, wherein the angle .theta..sub.3 is effective for directing a first fluid stream through the second orifice at the surface of the enclosed substrate portion to facilitate removal of the coating in the form of coating debris during or subsequent to exposure of the coating of an enclosed substrate portion to high energy radiation.

Abstract: A process for treating a coated substrate to reduce the thickness of the coating involves directing a laser beam at a predetermined surface portion of the substrate to remove part of the coating. The process can be used to treat a coated photoreceptor to precisely reduce the thickness of the coating in a predetermined region.

Abstract: A process for treating a predetermined portion of a coating on a photoreceptor to remove at least part of the coating involves directing a source of high energy irradiation at the coating in the presence of at least one fluid medium to remove at least part of the coating from the predetermined portion of the coating. The source of high energy irradiation is preferably a laser beam, ultrasonic energy, or a source of high intensity heat. The at least one fluid medium is preferably at least one gas jet, liquid jet or a liquid solvent.

Abstract: A mandrel for transporting hollow cylinders including an elongated arm having a first end and a second end, an expandable disk supported at the first end and means supported at the second end to expand the expandable disk, the mandrel arm comprising an elongated body having an imaginary axis and at least three fins extending substantially radially from the arm, each of the fins having an alignment shoulder adjacent the first end adapted to receive an end of a hollow cylinder and to coaxially align the cylinder with the elongated arm. This mandrel is used in a process for coating hollow cylinders.

Abstract: A mandrel for transporting a hollow cylinder including an elongated arm, a dish shaped disk adjacent one end of the elongated arm, the dish shaped disk having a flexible lip flared inclined away from the elongated arm, the flared flexible lip having a circular outermost edge, and a reciprocable presser means adapted to partially flatten at least a portion of the flexible lip adjacent to and including the outermost edge of the lip toward the elongated arm to increase the length of the circumference of the circular outermost edge of the lip. This mandrel is used in a process for coating hollow cylinders.

Abstract: A mandrel including an elongated arm having a first end and a second end, a reciprocatable shaft coaxially aligned with and extending through the arm, a first end of the shaft extending beyond the first end of the arm and a second end of the shaft extending beyond the second end of the arm, a presser means mounted at the first end of the shaft, an expandable disk shaped member coaxially aligned with and slidably mounted on the shaft between the presser means and the first end of the arm, a compression means mounted on the second end of the shaft, and a resilient helical spring coaxially aligned with and slidably mounted on the shaft between the presser means and the compression means, the compression means adopted to apply compression pressure to the disk shaped member and to the helical spring. This mandrel is used in a process for coating hollow cylinders.

Abstract: A mandrel for transporting a hollow cylinder including an elongated arm having an imaginary axis, an expandable disk shaped member having at least one hole and a circular outermost edge, the disk shaped member being mounted on and coaxially aligned with one end of the arm and including an elastomeric polymer material having a durometer of between about 25 and about 35 and a maximum continuous use temperature rating of at least about 230.degree. C., and means mounted on the mandrel to apply compressive pressure to the disk shaped member to increase the length of the circumference of the circular outermost edge. This mandrel is used in a process for coating hollow cylinders.