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AssigneeRoneo Alcatel Limited
InventorsWilliam G. Erskine, Kenneth Moore, Ronald Purvis, Robert F. Ridley, Nicholas G. Shreeve
Estimating the term…
In apparatus for electrostatographic reproduction of an original document having an electrostatographic recording member supported on a rotatable drum or belt, a developing station, a copy sheet supply station and a transfer roller at which developed toner images are transferred by an applied electric field from the recording member to the copy sheet, the transfer roller is arranged to operate in timed relationship to the operation of the copy sheet supply station and rotation of the drum or belt so that the leading edge of each copy sheet passes through the transfer zone before the electric field is applied. The copy sheets therefore separate or strip cleanly from the drum or belt. The apparatus may be a duplicator in which the recording member is imaged at a relatively slow speed in a first cycle of the drum or belt and the image is preserved for use in subsequent high speed cycles of the drum or belt.
Apparatus for electrostatographic reproduction of an original document including an electrostatographic recording member on which may be formed a latent electrostatic image, a rotatable support for the recording member, means for rotating the electrostatographic member and the support, a developing station at which a toner is applied to the recording member, means for supplying copy sheets sequentially to the rotatable support in registration with the latent image, and a transfer station at which the copy sheets pass synchronously with rotation of the support to a transfer roller which defines a nip with said support, said transfer roller being operative to engage the copy sheets in a line contact and to apply an electric field to transfer the developed image from the recording member to the copy sheets, the transfer roller being arranged to operate in timed relationship to the rotation of the support and the operation of the copy sheet supply means so that charging of the copy sheet begins only after its leading edge has progressed a predetermined distance beyond the line contact between the transfer roller and copy sheet.
Dependencies are inferred from the claim text.