An ink dispensing roll comprises a generally cylindrical member having a plurality of holes communicating with an interior annular reservoir and a microporous ink impregnated sleeve mounted about the cylindrical member. The annular reservoir is in liquid communication with a larger reservoir charged with ink that flows by gravity into the annular reservoir and then into the microporous sleeve.
RELATED APPLICATION
This application is a continuation-in-part of our application Ser. No. 102,866 filed on Sept. 30, 1987 and entitled Self-Metering Gravity Fed Ink Dispensing Roller and assigned to the same assignees as the present application.
A paint injector for digital printing in which paint is deposited in metered amounts on a print medium comprises a wheel rotatable by a shaft of a motor, an idler disposed in a paint reservoir, and an endless cable disposed around the wheel and the idler. The motor is preferably computer controlled such that the rotation of the wheel and thus movement of the cable is selectively controlled. As the wheel is rotated, paint contained within the paint reservoir coats the cable and is thus drawn by the cable in front of an air stream. The air stream pulls the paint from the cable and carries it toward the print medium. By employing a plurality of such paint injectors into a single print head, each containing a different color of paint, and secured to a computer controlled, movable carriage positioned over the print medium, a digital image can be painted by the print head on the print medium.
A paint injector for digital printing in which paint is deposited in metered amounts on a print medium comprising a wheel rotatable by a shaft of a motor, an idler disposed in a paint reservoir, and a segment of wire disposed around the wheel and the idler. The motor is preferably computer controlled such that the rotation of the wheel and thus movement of the wire is selectively controlled. As the wheel is rotated, paint contained within the paint reservoir coats the wire and is thus drawn by the wire in front of an air stream. The air stream pulls the paint from the wire and carries it toward the print medium. By employing a plurality of such paint injectors into a single print head, each containing a different color of paint, and secured to a computer controlled, movable carriage positioned over the print medium, a digital image can be painted by the print head on the print medium.
A paint injector for digital printing in which paint is deposited in metered amounts on a print medium comprises a wheel rotatable by a shaft of a motor, an idler disposed in a paint reservoir, and an endless cable disposed around the wheel and the idler. The motor is preferably computer controlled such that the rotation of the wheel and thus movement of the cable is selectively controlled. As the wheel is rotated, paint contained within the paint reservoir coats the cable and is thus drawn by the cable in front of an air stream. The air stream pulls the paint from the cable and carries it toward the print medium. By employing a plurality of such paint injectors into a single print head, each containing a different color of paint, and secured to a computer controlled, movable carriage positioned over the print medium, a digital image can be painted by the print head on the print medium.
A paint injector for digital printing in which paint is deposited in metered amounts on a print medium comprises a wheel rotatable by a shaft of a motor, an idler disposed in a paint reservoir, and an endless cable disposed around the wheel and the idler. The motor is preferably computer controlled such that the rotation of the wheel and thus movement of the cable is selectively controlled. As the wheel is rotated, paint contained within the paint reservoir coats the cable and is thus drawn by the cable in front of an air stream. The air stream pulls the paint from the cable and carries it toward the print medium. By employing a plurality of such paint injectors into a single print head, each containing a different color of paint, and secured to a computer controlled, movable carriage positioned over the print medium, a digital image can be painted by the print head on the print medium.
A cartridge for use with a printing apparatus of the type typically employed for digital printing in which a painting material is deposited in metered amounts on a print medium comprises a housing containing a drive wheel, a first idler disposed in a paint reservoir, a wire disposed around the wheel and the idler, and an air nozzle having at least one nozzle orifice therein for directing a jet of air toward said wire. As the drive wheel is rotated, as with an external drive mechanism, paint contained within the paint reservoir coats the wire and is drawn by the wire in the path of the air jet. The air jet removes at least a portion of the paint from the wire and deposits the paint onto a print medium. By employing a plurality of such cartridges into a single print head, each containing a different color of paint, a color image can be painted onto a print medium.
