Abstract: The developer station of a xerographic reproduction device is purged of used developer mix, and the developer is refilled with new mix, without disturbing the developer's operative position within the reproduction device. New mix is shipped from the factory in a sealed bag, protected by a unique, throw-away, rigid, corrugated paperboard, outer package. This package is opened at the location of the reproduction device to be serviced, and the sealed bag is removed. A tear strip on the side of the package is then removed, leaving an elongated opening along one side of the empty package. The package's shape is such that it can be inserted into the developer, with the package's elongated opening aligned with the developer's mix-flow path. Operation of the developer now fills the package with used mix. The package is then discarded. The sealed bag is opened, and the new mix is placed in the developer.

Abstract: An electrophotographic copier's magnetic brush roller applies developer material to the surface of a photoconductor drum. Two parallel centerlines define the photoconductor drum surface a fixed gap distance from the magnetic brush roller's mating surface. Moving the magnetic brush roller adjusts the gap distance between the mating surfaces. Two sandwiches of conventional, standard-thickness, flexible, plastic sheets form tools; one having a total thickness slighty larger than the desired gap between the mating surfaces of the drum and roller, and the other having a thickness slightly less than the desired gap. The desired gap is set by separating the drum and roller surfaces, inserting the tool that is slightly smaller than the gap and closing the gap sufficiently so that each of the mating surfaces on the drum and roller contacts one surface of the tool.