Abstract: A developer roll adjustment indicator device for use in association with a xerographic printer has an indicator plate with a collar that is removably secured to the end of the print drum shaft. A pointer made of a material having a magnetic attraction to the magnetic brushes in the developer roll is attached to the collar to permit the distal end of the pointer to freely rotate with respect to the axis of the print drum in response to the relative angular position of the magnetic brushes. The indicator plate has a number of visual indicia to measure the angular relationship of the pointer with respect to the axis of the print drum. Proper angular orientation of the indicator plate on the print drum shaft during installation is verified by means of a bubble level which provides a fixed point of reference for angular measurements.

Abstract: A smear test machine for diagnosing problems associated with reader sorters used to process documents having magnetic ink characters printed thereon includes read heads which are closely juxtaposed to a document transport subsystem adapted to move the document past the read head a preselected number of times as controlled by a solenoid-operated gate.

Abstract: This magnetic ink character recognition (MICR) character coating system makes use of the application of an inexpensive lubricant that is selectively applied to the document, solely in the area where the MICR characters are printed. The lubricant of choice used in this apparatus is sodium stearate (soap). The lubricating apparatus includes a pair of rollers, between which the printed documents are fed. One of the rollers is a drive roller that advances the documents. Opposite of and spring loaded against the drive roller is a free running lubricating roller that is manufactured from a solid lubricant, which lubricating roller is of length equal to the length of the MICR character field that is printed on the document. In the printing of the document, a sensor mark is printed on the document and is used to indicate the beginning of the MICR character field.

Abstract: A method and apparatus for splicing a fresh stack of continuous pin-feed forms in a high-speed printer having fed therethrough an expended stock of continuous pin-feed forms, where the printer includes an input station at a recessed area. A slidable tray for supporting the fresh stack is pulled out of the printer, and a splicing station which is hingedly coupled to an upright wall portion attached to the tray is deployed external to the printer for splicing ease. The splicing station includes a spool of splicing tape which is disposed within a locating groove of a controlled depth, the forms being registered on locating pins on either side of the groove for accurate splicing upon pressing them centered on the tape. When the splice is complete, the spliced stack is fan-folded upon the tray, the splicing station folded back against the upright wall portion, and the tray returned within the recessed area.

Abstract: A high speed printer is provided having a plurality of aligned hammer assemblies for directing hammers at a moving character band for printing characters responsive to the hammer's driving against the character band. The hammer assembly has a striker arm pivotly mounted to a striker assembly frame and which acts as an armature when driven by a pair of magnets. The magnets are attached to the striker assembly frame on opposite sides of the striker arm and on opposite sides of the pivot point for the striker arm so that simultaneously actuating both magnets pulls the striker arm for actuating the hammer. Each magnet has a single coil, with one of the magnets having a reverse polarity from each adjacent magnet on an adjacent assembly, while the other magnet has the same polarity to avoid cross-talk and to increase the speed of the printer.