Itek Colour Graphics, Ltd.

Icg Limited

Paul Christopher Cook

Peter J Neilson

Graham A Thomson

Stephen Clifford Smith

Alan R Dresch

Alan Peter Ogburn

Raymond John Drewett

Platesetter

An apparatus and method for controlling an image recording device. The apparatus includes an acousto-optic deflector that deflects a beam of light so as to write a sub-scan comprising a predetermined number of picture elements. The image recording device is arranged to write a plurality of sub-scans side by side in a substantially contiguous manner. The apparatus also includes a component that commences sub-scans, a start of sub-scan detector that detects when the light beam is directed towards a start of sub-scan position, and an end of sub-scan detector that detects when the beam of light is directed towards an end of sub-scan position. A timing logic controller generates a start reference signal representing a desired position for the start of a sub-scan. A controller compares an output of the start of sub-scan detector with respect to the start reference signal. The controller also adjusts a frequency range of a chirp applied to the acousto-optic deflector while keeping a start time of the chirp constant so as to cause an arrival time of the light beam at the start of sub-scan detector to coincide with the start reference signal. A picture element rate controller adjusts a rate at which picture elements are written such that a final one of the picture elements is written a predetermined period before the light beam is directed towards the end of sub-scan position.

Apparatus for and method of controlling an image recording device

A rotary drum scanner comprises a rotatably mounted hub, a drum detachably mounted to the hub and an interlock mechanism which locks the hub against rotation until the drum is locked to the hub.

Rotary drum scanner

Drum scanner for color scanning

A compact rotary drum colour separation scanner includes a drum which is rotatably mounted about an upwardly extending axis which is preferably slightly inclined to the vertical. A part of the carriage carrying either a light source or reading head travels into the drum through the hub upon which the drum is mounted.

Growing community of inventors

Gloucestershire, United Kingdom

Paul Christopher Cook