Patent ID: 7641317
Filing Date: 2010-01-05
Classification: B41J

Abstract:
1. A liquid discharge recording head comprising: a substrate having a plurality of heat generating resistors generating heat energy used for discharging the liquid and a liquid supply opening facilitating supplying the liquid to the heat generating resistors; a flow path member having a plurality of discharge openings and a plurality of flow paths, the plurality of discharge openings being disposed in correspondence with the plurality of heat generating resistors, the plurality of flow paths connecting the plurality of discharge openings and the liquid supply opening to each other, wherein the plurality of liquid flow paths comprise a first flow path and a second flow path that are adjacent each other, the second flow path being longer than the first flow path, the first flow path having a substantially consistent flow path width along a length of the first flow path, the second flow path having a substantially consistent flow path width along a length of the second flow path; and a first resister corresponding to the first flow path and a second resister corresponding to the second flow path, each of the first resister and the second resister being disposed at an area of the flow path member that is opposing the liquid supply opening, wherein an amount of protrusion of the first resister at a side of the first flow path is greater than an amount of protrusion of the second resister at a side of the second flow path, and wherein a distance between the first resistor and the first flow path is smaller than a distance between the second resistor and the second flow path.