Abstract: A scanner for scanning a document positioned against a backing surface to determine the position of the document includes photoelectric transducers which provide electrical scan signals in dependence upon the light reflected from the document and from the backing surface at a plurality of moving scan positions as the scan positions move across both the document and the backing surface. A recognizable background image is defined on the document backing surface such that the photoelectric transducers provide a recognizable pattern of scan signals as the document backing surface is scanned, thereby indicating the position of the document. The recognizable background pattern may include a plurality of stripes on the document backing surface with the stripes extending substantially parallel to the direction of movement of the scan positions.

Abstract: An ink jet printer deposits ink drops from a plurality of jet drop streams along a plurality of parallel adjacent print lines on a sheet of paper. The printer includes a sheet supporting drum, means for rotating the drum, and a print head which is slidably mounted adjacent the drum for linear movement in a direction parallel to the axis of rotation of the drum. A rotatable cam defines a continuous endless camming surface with the cam being driven by a drive arrangement interconnected with the means for rotating the drum. A cam follower means follows the continuous camming surface and moves the print head in a direction parallel to the axis of rotation of the paper supporting drum such that jet streams are directed to deposit drops along respective ones of the print lines during successive rotations of the drum.

Abstract: A safe, easy and fast procedure and apparatus for sealing by welded steel plugs branch lines connected to conduits through which gas is flowing, uses a low-carbon steel plug which does not develop cracks on cooling from welding temperature; such plug is arranged to carry a resilient sealing and holding element for locating such plug in place in a cut branch line during welding as well as providing a seal against gas passage during welding. A hard metal die element is provided to properly enlarge and form the cut branch line to accept the plug and resilient sealing and holding element.

Abstract: An ink jet printer includes a print head means which generates two parallel rows of jet drop streams. Charge electrodes are mounted on a pair of charge electrode plates which are movable into and out of drop charging positions. A pair of catchers each define a drop catching surface and a drop ingesting slot along the lower edge of the drop catching surface. Each of the catchers is generally pivotally mounted for rotation about an axis parallel to the rows of jet drop streams. The catchers may be pivoted from a drop catching position, in which the drop catching surfaces are substantially parallel, to a full catch position in which drop catching surfaces are inclined to face upward and intercept the jet drop streams. In the full catch position, the drop ingesting slots are positioned closely together. A linkage arrangement is provided for pivoting the catchers from the full catch position to the drop catch position after start up of the print head means.

Abstract: A lithographic ink and moisture control system is provided for maintaining copy quality over a wide range of operating and environmental conditions without special operator assistance. The control system, among other things, adjusts the ink and moisture feed rates to compensate for predicted changes in master conditions associated with the absorption of moisture by the master during the course of a copy run.

Abstract: This application is concerned with the treatment of metal surfaces with stable solutions of hexavalent chromium, trivalent chromium, phosphoric acid, polyacrylic acid and water dispersible acrylic emulsion polymer to enhance the corrosion resistance and paint adhesion properties of the metal; the coating uniquely having generally universal utility under a wide variety of paint systems and paint types.

Abstract: A lithographic ink and moisture control system as provided for maintaining copy quality over a wide range of operating and environmental conditions without special operator assistance. The control system, among other things, adjusts the ink and moisture feed rates to compensate for predicted high moisture conditions which occur at several short copy runs, wherein significant moisture is introduced with each new master.

Abstract: An ejector assembly adapted to intermingle a gas, such as chlorine, with process liquid or water to form a solution which is discharged from the assembly. Included in the assembly is an ejector body within which is disposed a nozzle whose output is spaced from the inlet of a throat to define an interaction zone which communicates with a gas supply. Liquid under pressure is fed into the nozzle and is forced thereby at high velocity into the interaction zone to create a vacuum acting to draw gas from the gas supply. The gas interacts with the liquid to form a solution that is discharged via the throat through suitable piping to a point of application.