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US 12,710,719 B2Granted
Metal material printing equipment and printing method, and printed metal material obtained therefrom
AssigneePosco
InventorsSun-Hong Park, Jin-Tae Kim
Life of this patent
Estimating the term…
Abstract
The present invention relates to printing equipment for printing images such as letters, pictures and the like on the surface of metal such as a steel plate, that may stably print images on the surface of metal at high speed, a printing method using the same, and a printed metal material obtained therefrom.
Claims13
Metal printing equipment comprising:
- a photosensitive drum (300) coming in close contact with metal (100) moving continuously, rotating in one direction, and transferring and fixing a toner T attached to a surface thereof to a surface of the metal (100);
- a developing unit (500) provided on one side of the photosensitive drum (300) and providing the toner (T) to the surface of the photosensitive drum (300);
- a photosensitive drum charging unit (410) charging the surface of the photosensitive drum (300) before the toner (T) is provided;
- an exposure unit (200) applying light energy to the surface of the photosensitive drum (300) according to a required image, between the developing unit (500) and the photosensitive drum charging unit (410);
- metal charging unit (101) charging the surface of the metal (100) such that the toner (T) attached to the surface of the photosensitive drum (300) is transferred to the surface of the metal (100);
- a removal unit (600) removing the toner (T) remaining on the surface of the photosensitive drum (300) after the toner (T) is fixed to the surface of the metal (100);
- a photosensitive drum discharging unit (420) removing a charge from the photosensitive drum (300) after removing the toner (T);
- and
- a fixing unit (700) located on a rear end of the photosensitive drum (300) and fixing the toner (T) fixed to the surface of the metal (100),
- wherein the fixing unit (700) includes a pressure roll (720),
- wherein the pressure roll (720) has a structure capable of moving up and down depending on the thickness of the metal (100) in a fixing operation,
- wherein the metal charging unit (101) is included as two or more, and two or more metal charging units (101) are provided both in front and rear ends of the photosensitive drum (300) based on a moving direction of the metal (100) or both above and below the metal (100), and
- the two or more metal charging units (101) are configured to charge the metal (100) to the same polarity.
10 more elements
A metal printing method comprising:
- a charging operation of charging a surface of a photosensitive drum (300) rotating in one direction;
- an exposure operation of applying light energy according to a required image to the surface of the charged photosensitive drum (300);
- a development operation of providing toner (T) to the surface of the photosensitive drum (300) after the exposure operation;
- a transfer operation of continuously moving the toner attached to the surface of the photosensitive drum (300) and moving and fixing the toner to a surface of a charged metal (100);
- a fixing operation of fixing the toner settled on the surface of the metal (100);
- a removal operation of removing toner remaining on the surface of the photosensitive drum (300) after the transfer operation;
- and
- a discharging operation of discharging the surface of the photosensitive drum (300),
- wherein a pressure roll (720) moves up and down depending on the thickness of the metal (100) in the fixing operation, and
- wherein the metal (100) is charged by undergoing two or more charging operations of the same polarity such that the toner (T) attached to the photosensitive drum (300) is moved and fixed to the metal (100) during the transfer operation.
7 more elements
Dependencies are inferred from the claim text.