Abstract: A print engine synchronization method enables the movement of a first print engine dielectric support member (DSM) having one or more image frames as well as the movement of a second print engine DSM having one or more image frames by monitoring a first frame signal from the moving first print engine DSM and a second frame signal from the moving second print engine DSM. An offset is determined for each of corresponding pairs of frames from the one or more image frames of the first and second print engine DSM and the determined offset for each corresponding pair of frames is compared to a target offset to maintain synchronization between the first and second print engines on a frame by frame basis by adjusting a second print engine DSM velocity based on the comparison of the determined offset and the target offset.

Abstract: A print engine synchronization system apparatus enables the movement of a first print engine dielectric support member (DSM) having one or more image frames as well as the movement of a second print engine DSM having one or more image frames by monitoring a first frame signal from the moving first print engine DSM and a second frame signal from the moving second print engine DSM. An offset is determined for each of corresponding pairs of frames from the one or more image frames of the first and second print engine DSM and the determined offset for each corresponding pair of frames is compared to a target offset to maintain synchronization between the first and second print engines on a frame by frame basis by adjusting a second print engine DSM velocity based on the comparison of the determined offset and the target offset.

Abstract: A print engine synchronization method enables the movement of a first print engine dielectric support member (DSM) having one or more image frames as well as the movement of a second print engine DSM having one or more image frames by monitoring a first frame signal from the moving first print engine DSM and a second frame signal from the moving second print engine DSM. An offset is determined for each of corresponding pairs of frames from the one or more image frames of the first and second print engine DSM and the determined offset for each corresponding pair of frames is compared to a target offset to maintain synchronization between the first and second print engines on a frame by frame basis by adjusting a second print engine DSM velocity based on the comparison of the determined offset and the target offset.

Abstract: A method for sensing a register discrepancy (r) in a multi-color printed item, the position of at least one register mark (1, 1′) that is associated with one color being sensed with respect to the position of at least one register mark (2, 2′) that is associated with at least one further color, and any density register discrepancy (r) using a measurement window being ascertained from discrepancies in the actual relative position (3) with respect to the reference relative position (4). The invention, furthermore, concerns an apparatus, a register control system, and register marks (1, 1′, 2, 2′).

Abstract: A recording apparatus includes a toner image bearing member and a transfer backing member that define a transfer nip. Pressure is applied in the transfer nip to a receiver member that is in engagement with the toner image bearing member for transfer of a toner image on the toner image bearing member to the receiver member. A sensor senses a parameter related to thickness of the receiver member prior to movement of the receiver member into the nip. An adjustment device is responsive to sensing of the parameter and adjusts nip spacing between the toner image bearing member and the transfer backing member.

Abstract: An isolation coupling which provides for isolation of torsional vibration, from a drive component to a drive component, such as a driven shaft, due to non-constant drive forces. The vibration isolation coupling includes a drive assembly connected to the drive component, and a driven assembly connected to the driven component. The drive assembly and the driven assembly are axially aligned, such as being mounted on the shaft of the drive component for example. A member, having torsional compliability, interconnects the drive assembly to the driven assembly. Accordingly, vibrations imparted to the drive assembly are isolated from the driven assembly by such torsional compliability of the member.

Abstract: A linear printhead is aligned across the direction of motion of a belt or web image member. The printhead is coupled to a roller supporting the belt which is castered about a caster axis. The castering of the roller causes it to align itself across the direction of motion of the image member. The printhead is responsive to this alignment of the roller for its own alignment.

Abstract: A copier system includes an editing station for providing editing information. The station includes a scanner for scanning a document at high resolution and a display for displaying the scanned document at low resolution. Upon identification of the area of interest for editing the designated area is displayed at a higher resolution on the display. Editing information is then created using the display and the document copied on a copier with copies modified in accordance with the editing information.

Abstract: Apparatus for selecting and displaying areas on an original document which are to receive special editing. High intensity light passing through a liquid crystal device (LCD) is projected through the document to highlight the selected areas. Control of the electronic shutters in the LCD is responsive to the coordinate data entered by the digitizing apparatus. The complete area can be highlighted as well as only highlighting a border around the designated area. Specific color can be used for highlighting the selected area to provide additional information as to the type of editing to be performed within the selected area.

Abstract: An electrophotosensitive member is uniformly charged and portions to be toned by one type toner are erased. Those portions are filled in with a charge of different potential, for example, a charge of polarity opposite to that of the original charge. The charged member is imagewise exposed and developed with two toners selectively attractive to the different charge potentials. With this method a multicolor image can be formed iwth a single exposure.