Patent ID: 7134458

Claim:
A method for producing a reinforcing fiber woven fabric comprises: forming the reinforcing fiber woven fabric by using a loom including a weft yarn bobbin being wound a weft yarn comprising a reinforcing fiber yarn, a weaving means for interlacing the weft yarn unwound from the weft yarn bobbin with plural of warp yarns each of which comprises reinforcing fiber yarn separately supplied for forming a woven fabric, a weft yarn feeding passage through which the weft yarn proceeding from the weft yarn bobbin to the weaving means is passed, a weft yarn unwinding means provided in the weft yarn feeding passage for laterally unwinding the weft yarn from the weft yarn bobbin, and a weft yarn storing means provided in the weft yarn feeding passage for temporarily storing a segment of the weft yarn proceeding to the weaving means, wherein (A) the weft yarn storing means comprises a weft yarn storing cylinder, (B) the weft yarn storing cylinder has a weft yarn gate opened to outside air at one end thereof and an air releasing port for sucking and releasing air in the weft yarn storing cylinder at the other end thereof, wherein peripheral edges of the weft yarn gate of the weft yarn storing cylinder have at least a first side and a second side parallel to each other; an inlet guide at the side of yarn leading-in is provided along the first side, to be kept in contact with the weft yarn coming from the weft yarn bobbin into the weft yarn storing cylinder; and an outlet guide at the side of yarn leading-out is provided along the second side, to be kept in contact with the weft yarn destined to go out from inside the weft yarn storing cylinder toward the weaving means, and (C) the weft yarn storing cylinder has a weft yarn contact means for forming a yarn passage by contacting with the weft yarn located therein which is drawn into the weft yarn storing cylinder through the weft yarn gate under function of air sucking and releasing brought by the air releasing port, wherein the weft yarn contact means located in the weft yarn storing cylinder comprises a guide at the side of yarn leading-in to be kept in contact with the weft yarn leading-in from the inlet guide and a guide at the side of yarn leading-out to be kept in contact with the weft yarn leading-out from the outlet guide, and a distance (L) between the guide at the side of yarn leading-in and the guide at the side of yarn leading-out in the direction perpendicular to the direction of the inlet guide gradually decreases from the weft yarn gate toward the air releasing port; positioning the weft yarn gate along the weft yarn feeding passage; drawing the segment of the weft yarn which is unwound from the weft yarn bobbin, passed through the weft yarn gate and proceeded to the weaving means, into the weft yarn storing cylinder under function of air sucking and releasing brought by the air releasing port; and storing temporarily the segment of the weft yarn in the weft yarn storing cylinder and supporting the weft yarn with the weft yarn contact means.