Abstract: A device for measuring in three dimensions a topographical shape of an object. The device comprises an arrayed confocal imaging system having a confocal topographical mask provided for converting light produced by a light source into an array of small spots. The mask being mounted on a scanning member provided for moving the mask over successive positions over a predetermined distance. The device further comprises a confocal objective provided for mapping at successive object-position-in-focus the array of small spots output at said successive positions. The confocal objective may be mounted at a fixed position within said device.

Abstract: A device for measuring in three dimensions a topographical shape of an object. The device comprises an arrayed confocal imaging system having a confocal topographical mask provided for converting light produced by a light source into an array of small spots. The mask being mounted on a scanning member provided for moving the mask over successive positions over a predetermined distance. The device further comprises a confocal objective provided for mapping at successive object-position-in-focus the array of small spots output at said successive positions. The confocal objective may be mounted at a fixed position within said device.

Abstract: The printer includes a moving image-carrying belt, and a plurality of toner image producing stations for sequentially depositing a plurality of toner images in register with each other on the surface of said image-carrying belt to form a composite toner image thereon. The image-carrying belt is formed of an electrically non-conductive material having a mean volume resistivity of from 108 to 1011 ohm m.

Abstract: The device includes an endless fixing member urged into contact with an endless counter member to form a fixing nip therebetween through which a receiving material path extends. A cleaning member having a tacky surface is in contact with the surface of the fixing member to remove debris therefrom. Polymer material particles are applied to the cleaning member to render the surface tacky. A radiant heating device heats the polymer material particles on the cleaning member surface to render the surface tacky prior to contact of the cleaning member surface with the fixing member surface. Debris, especially paper dust, can thereby be reliably removed from the fixing member.

Abstract: An electrostatographic printer for forming an image onto a web comprises at least one toner image-producing electrostatographic station having a drum onto which a toner image can be formed, a transport for conveying a web past the image-producing station, apparatus for controlling the speed and tension of the web while it is running past the image-producing station, and transfer apparatus for transferring the toner image on the drum onto the web. The printer is characterized by a control arrangement for switching between a printing mode wherein a printing web moves in synchronism with the peripheral speed of the drum and a refurbishment mode wherein a refurbishment web moves at a faster speed relative to the peripheral speed of the drum and in contact therewith, to cause refurbishment of the drum surface.

Abstract: A receptor material conditioning apparatus and method for conditioning a moving paper web suitable for use in an electrostatographic printer. A heated drum reduces the moisture content of paper moving along a paper web path. A cooling box positioned downstream of the heated drum cools the moving receptor material. An electrometer determines the electrical condition of the paper before it leaves the apparatus. By conditioning the paper web, a higher yield of toner transfer in the subsequent electrostatographic printer can be obtained.

Abstract: An electrostatographic printer is described for forming an image onto a moving web or sheet. The printer includes a number of toner image-producing electrostatographic stations having rotatable drums onto which a toner image can be formed. A development station forms a toner image on the drums. Drive rollers convey the web past the image-producing stations. Corona discharge devices transfer the toner image on the drum surface onto the moving web. The printer also has an air-conditioning device which has filters for removing dust and ozone from air leaving the environment of the image-producing station, a heat exchanger and a humidifier for adjusting the temperature and humidity of air leaving the environment of the image-producing station, and an inlet manifold for introducing a stream of the conditioned clean air into the environment of the image-producing stations.