Image transfer recording apparatus

Claim 1

An apparatus for recording an image by transfer printing as defined in claim 1, in which said layer of resin is made of polyamide imide.

Claim 3

An apparatus for recording an image by transfer printing comprising a recording drum composed of a drum member of conductive Metal and a layer of resin covering the surface of said drum member, said layer having a breakdown voltage of not less than 1 kV, a volume resistivity of more than 1014 Omega cm, a surface resistivity of more than 1014106 and no pinholes and preventing fused toner from attaching thereto, means for applying information in the form of a signal voltage to the surface of said recording drum through a recording electrode thereby to form a latent image of an electrical charge on the surface of said recording drum, developing means for selectively supplying a powdery developer through the medium of a magnet drum to the latent image formed on said recording drum, electrostatic charging means disposed adjacent to the back face of a recording sheet in contact with the powdery developer selectively attached to the latent image, and residual charge erasing means disposed opposite to said recording drum for removing the electrostatic force remaining on the surface of said recording drum after the powder image on said recording drum has been transfer printed onto the recording sheet so as to make it possible for the following information to be applied to said recording drum without cleaning the powder image remaining on the surface of the recording drum after the recording sheet transfer printed.

Claim 6

An apparatus for recording an image by transfer printing comprising a plurality of sets each consisting of a recording drum having a layer of resin covered on the surface thereof, said layer having a breakdown voltage of not less than 1 kV, a volume resistivity of more than 1014106 cm, a surface resistivity of more than 1014 Omega and no pinholes and preventing fused toner from attaching thereto, means for recording information on the surface of said recording drum through the medium of electrostatic recording means thereby to form a latent image on the surface of said recording drum, and means for developing the latent image, said sets being arranged side by side equal and corresponding to the number of required primary colors, and demodulator means for separating a multiple color signal into the respective primary color signals so that the primary color signals are recorded on the surface of said recording drums by said recording means and then developed by said developing means and a recording sheet is successively brought into contact with the surface of said recording drums for the transfer printing of the color images onto the recording sheet.

Claim 8

An apparatus for recording an image by transfer printing comprising means for forming a latent image on a layer of resin and at a location opposite to the surface of a recording drum driven by an electric motor, said layer covering the surface of the recording drum and having a breakdown voltage of not less than 1 kV, a volume resistivity of more than 1014 Omega cm, a surface resistivity of more than 1014 Omega and no pinholes and preventing fused toner from attaching thEreto, developing means for selectively supplying a powdery developer to the latent image formed on the recording drum, means for transfer printing the developed image formed by the developer selectively attached to the latent image onto a recording sheet contacting said recording drum, and residual charge erasing means disposed opposite to said recording drum for removing the electric charge remaining on said recording drum without cleaning the surface of said recording drum after the developed image has been transfer printed onto the recording sheet, in which said means for forming a latent image comprises a holder which is mounted on a slide rod so as to be movable in the axial direction of the recording drum and a recording stulus which is mounted on the holder and one end of which contacts the surface of the recording drum only in the case of a signal voltage being applied, said developing means comprises a magnet drum which is housed in a casing and is mounted so as to be rotatable in either normal or reverse direction, a powdery developer which is supplied to the recording drum by the magnet drum only in the case of the latent image being developed and a sweeping plate which is engaged at a portion thereof with the outer surface of the magnet drum for controlling the amount of the powdery developer supply to the recording drum in response to the rotating direction of the magnet drum, said means for transfer printing comprises a recording sheet which is brought into contact with the recording drum by a guide roller and a charging means disposed on the back side of the recording sheet, and said residual charge erasing means comprises an electrode which is covered by a cover and one end of which is opposed to the recording drum through an insulator.