Patent attributes
A printer having a roll with a radial outer roll surface has an ink cartridge having a housing itself having a pair of side walls and a pair of end walls bridging the side walls and defining therewith a downwardly open mouth juxtaposed with the roll surface. One of the side walls is shiftable between an outer position defining a relatively large volume and an inner position. Doctor blades supported on the housing have outer edges resiliently engageable at the mouth with the surface. One of the doctor blades is shiftable between an open position with its outer edge spaced from the other doctor blade and a closed position. A mechanism connected to the one wall and to the one doctor blade shifts the one doctor blade between the open position and the closed position and simultaneously shifts the one wall from the inner position to the outer position.
