Abstract: A structure for calibrating an image sensor or other photosensor includes a baffle for passage of a sheet therethrough. A photosensor is disposed to receive light reflected from a sheet passing through the baffle. A selectably-positionable target member has a target surface associated therewith, and is positionable in one position establishing a width of the baffle suitable for passage of a sheet through the baffle, and another position wherein the first target surface is disposed adjacent to the photosensor.

Abstract: A structure for calibrating an image sensor or other photosensor includes a baffle for passage of a sheet therethrough. A photosensor is disposed to receive light reflected from a sheet passing through the baffle. A selectably-positionable target member has a target surface associated therewith, and is positionable in one position establishing a width of the baffle suitable for passage of a sheet through the baffle, and another position wherein the first target surface is disposed adjacent to the photosensor.

Abstract: A shelter is formed by joining a resilient sleeping pad at its edges to a thin, flexible, waterproof, vapor-breathable shell. The sleeping pad, being the floor of the shelter, eliminates material otherwise used for this purpose. An opening in the shell for the user's face, is edged with a sleeve containing a drawstring for closing the opening to the extent desired. A zippered separation in the shell extends from the opening, to provide easy access into the shelter. A canopy, attached to the shelter, is supported above a user by long, resilient wands attached to the canopy material. Various embodiments are disclosed for combining a canopy with the basic shelter, for supporting the canopy above the user, and for providing entry into the resulting shelter.

Abstract: A shelter is formed by joining a resilient sleeping pad at its edges to a thin, flexible, waterproof, vapor-breathable shell. The sleeping pad, being the floor of the shelter, eliminates material otherwise used for this purpose. An opening in the shell for the user's face, is edged with a sleeve containing a drawstring for closing the opening to the extent desired. A zippered separation in the shell extends from the opening, to provide easy access into the shelter. A canopy, attached to the shelter, is supported above a user by long, resilient wands attached to the canopy material. Various embodiments are disclosed for combining a canopy with the basic shelter, for supporting the canopy above the user, and for providing entry into the resulting shelter.

Abstract: An electrophotographic printing machine in which an arcuate screen member has a plane of curvature substantially normal to the plane of curvature of an arcuate photoconductive member employed therein.

Abstract: An electrophotographic printing machine in which an adjustable screen has particles removed therefrom by a cleaning member moving thereacross.