Method and apparatus for adapting an electrostatic copier machine to a plain paper facsimile transceiver

DETAILED DESCRIPTION What is claimed is: 1.
Applique apparatus to be removably mounted on a plain paper electrostatic copier having a moving document transparent platen and internal photoreceptor means with said applique mounted above and spaced-apart from said platen after removal of the platen cover without modification of the copier for producing a system having as functions those of a copier, a laser printer for a computer, a laser document scanner, and a laser facsimile receiver and transmitter, said applique apparatus comprising: housing means for containing the components of the applique apparatus; means for initiating normal copier action externally to said copier; means for monitoring the position of said platen as it moves across the top of said copier and to derive therefrom timing signals that are indicative of the position of said photoreceptor means; means for receiving a data stream that is representative of the pixelization of a document line by line; laser means aligned with said photoreceptor means for exposing said photoreceptor means with light in a spectral density range that will sensitize said photoreceptor means; means for modulating said laser means with said received data stream to selectively expose said photoreceptor means in response to said data stream; and means for focusing and deflecting the light emitted by said laser means to linearize the swept light onto said photoreceptor means under control of the timing signals from said monitoring means to make a copy from said data stream.
2.
Applique apparatus as in claim 1 further includes means to be affixed to the exterior surface of said copier for precisionaly locating said housing means to align the light radiated by said laser means with said photoreceptor means of said copier.
3.
Applique apparatus as in claim 2 wherein said locating means is adjustable.
4.
Applique apparatus as in claim 1 further includes safety interlock means to minimize the possibility of light from said laser means exiting said housing means