Off-set nip roll decurler
Oil applying roller for use in an electrophotographic copying ap
Oil supply apparatus
One-component copier toner with electric field transfer
Opening detecting device of a copy document cover suitable for e
Optical apparatus for selectively producing rippled message imag
Optical copier
Optical copying arrangement
Optical device
Optical device for copying machine with inversion of principal p
Optical device in variable magnification electrostatic copying a
Optical element positioning apparatus for use in electrophotogra
Optical exposure unit for electrophotographic printing device
Optical fiber cathode ray tubes and copy machines using the same
Optical fiber cathode ray tubes and copy machines using the same
Optical illumination device for use in copying machine
Optical image projector for projecting an erect positive image o
Optical input and output scanning system
Optical projection apparatus for image transfer type electrophot
Optical recording using field-effect control of heating