Abstract: A method and apparatus are disclosed for producing an image made up of marks having varying sizes, densities and/or shapes on an imaging media. The image is generated in response to image data defining the image to be produced received by an input scanner or other input device. The image data is processed and then used to address at least one amplitude and/or pulse width modulation table to, in turn, generate amplitude and pulse width signals which controls a writing device. Marks are therefore written onto the media, such marks having varying sizes, densities and/or shapes for forming the completed image.

Abstract: Apparatus for controlling tension in a movable web includes a frame supporting a web supply roll, and a torque motor connected to the supply roll. The web is supported along a web path. Web position is measured by a dancer roll biased against the web. A signal representative of the web position is generated and supplied to a control system, which receives the position signal and generates in response a torque signal representative of a torque value to be applied to the roll to cause the actual web position to equal a nominal position. The control system is connected to the torque motor to control the motor in accordance with the torque signal.

Abstract: Graphics and text data are combined selectively to discharge incremental areas of a charged electrophotographic member to form thereon a latent text and/or graphics image represented by the graphics and text data, the imaged member thereafter being toned and output from the system so that the toned image may be fused on the member and the member may be used as a printing plate in an offset lithographic printing press. The apparatus includes an optical system that may form a maximum of 22 individual rays which are deflected twice through a field flattening lens and then onto the charged member. The optical system further includes an optical scale or grating which provides electrical signals indicating the precise location of the individual rays along scan lines on the member. The apparatus further includes an electronic system which generates electrical signals from the graphics and text data to form the 22 individual rays.

Abstract: A digital plate maker system to receive graphics and text data and selectively discharge incremental areas of a charged electrophotographic member to form thereon the latent images represented by the graphics and text data, the imaged member thereafter being toned and output from the system. Thereafter, the toned image may be fused on the member and the member being used in an offset lithographic printing press. The digital platemaker system includes an optical system which may form a maximum of 22 individual rays which are direct deflected twice through a field flattening lens and then onto the charged member. The optical system further includes an optical scale or grating which provides electrical signals indicating the precise location of the individual rays along scan lines on the member. The digital plate maker system further includes an electronic system which generates electrical signals to form the 22 individual rays.

Abstract: Graphics and text data are combined selectively to discharge incremental areas of a charged electrophotographic member to form thereon a latent text and/or graphics image represented by the graphics and text data, the imaged member thereafter being toned and output from the system so that the toned image may be fused on the member and the member may be used as a printing plate in an offset lithographic printing press. The apparatus includes an optical system that may form a maximum of 22 individual rays which are deflected twice through a field flattening lens and then onto the charged member. The optical system further includes an optical scale or grating which provides electrical signals indicating the precise location of the individual rays along scan lines on the member. The apparatus further includes an electronic system which generates electrical signals from the graphics and text data to form the 22 individual rays.