Electrophotographic printers
AssigneeHP Indigo B.V.
InventorsPeter Nedelin, Mark Sandler, Shai Lior
Life of this patent
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Abstract
A method of operating an electrophotographic printer (100) to control the optical density of a printed image is described. The method comprises providing a printing substance on a transfer member (104); emitting a pulse of heat to heat the printing substance on the transfer member to increase flowability of the printing substance on the transfer member; and transferring, from the transfer member to a substrate (108), the printing substance heated by the pulse of heat so as to provide the printed image on the substrate.
Claims17
A method of operating an electrophotographic printer to control the optical density of a printed image, the method comprising:
- providing a printing substance on a transfer member;
- emitting a pulse of heat having a power density of at least 0.1 W/mm2 to heat the printing substance on the transfer member for a period of less than 0.5 seconds to increase flowability of the printing substance on the transfer member prior to the printing substance being transferred to a substrate;
- and
- transferring, from the transfer member to the substrate, the printing substance heated by the pulse of heat so as to provide the printed image on the substrate.
An electrophotographic printer comprising:
- a transfer element to transfer an image from the transfer element to a substrate;
- and
- a heater to emit a pulse of heating energy with a power density of at least 0.1 W/mm2 for a period of less than 0.5 seconds to heat the image on the transfer element prior to the image being transferred to the substrate.
An electrophotographic printer to control the optical density of a printed image, the electrophotographic printer being to:
- provide a printing substance on a transfer member;
- emit a pulse of heat having a power density of at least 0.1 W/mm2 to heat the printing substance on the transfer member for a period of less than 0.5 seconds to increase flowability of the printing substance on the transfer member prior to the printing substance being transferred to a substrate;
- and
- transfer, from the transfer member to the substrate, the printing substance heated by the pulse of heat so as to provide the printed image on the substrate.
Dependencies are inferred from the claim text.