Indigo N.v.

Hewlett-packard Indigo B.v.

Yevgeny Korol

Lior Lewintz

Benzion Landa

Omer Gila

Alex Feygelman

Shlomo Harush

Oded Sagiv

Ilan Meiri

Aron Shmaiser

Alon Gazit

Yosef Yossi Rosen

Erez Heinsdorf

Apparatus for duplex printing comprising: a first impression roller () on which a first side of a sheet () having a leading edge and a trailing edge is printed referenced to the leading edge; a second impression roller () on which a second side of the sheet is printed; and a transport system () that removes a printed sheet from the first impression roller () and transports it to the second impression roller (), the transport system comprising a perfector () that receives the sheet and grips it along both the leading and trailing edges of the sheet, which perfector turns the sheet over and transfers the sheet trailing edge first towards the second impression roller.

Duplex printing system

A method for registration of print separations in a printer comprising: (a) printing a first pattern, for which at least one image characteristic varies relatively weakly with misregistration, using at least one of first and second separations; (b) printing a second pattern, for which said at least one image characteristic varies relatively strongly with misregistration, using said at least one first and second separations; (c) determining said at least one image characteristic for the first and second patterns; and (d) correcting the mutual registration of said at least one first and second separations responsive to a difference in the determined at least one image characteristic for the first and second patterns.

Automatic registration and length adjustment

Imaging device having liquid toner applicator using a nozzle

Imaging apparatus including a photoreceptor, a charging station operative to charge the photoreceptor including an active length of corona wire operatively juxtaposed with the photoreceptor and a corona wire dispenser containing an undispensed length of corona wire contiguous with the active length and at least as long as the active length. The apparatus also includes an exposure station operative to selectively discharge portions of the photoreceptor to form a latent image thereon and a developer operative to develop the latent image. The corona wire dispenser is operative to dispense an appropriate length of the undispensed corona wire to replace the active length of corona wire. The corona wire dispenser preferably includes a dispensing bobbin around which the undispensed corona wire is wound, a lever-plate on which the dispensing bobbin is rotatably mounted, a friction pin and apparatus operating on the lever-plate for forcing an edge of the dispensing bobbin into contact with the friction pin with a given force whereby the undispensed corona wire is dispensed from the dispensing bobbin when tension in the corona wire is greater than a first threshold tension which is directly proportional to the given force and wherein wire continues to be drawn so long as the tension in the corona wire is greater than a second threshold tension.

Charging apparatus operative to charge a surface

Growing community of inventors

Rehovot, Israel

Yevgeny Korol