| 摘要 |
PROBLEM TO BE SOLVED: To provide a method with good productivity for producing a packaging bag with a gusset provided with an opening/closing chuck. SOLUTION: Sheets for gussets are arranged in parallel at a definite interval on a sheet for a back face body by means of a conveyer after they are cut into a shorter length than the width of the sheet for the back face body and one of a pair of continuous tapes for opening/closing chucks is overlayed on both end parts of the sheets for the gussets and is fused on the sheets for the gussets and the sheet for the back face body and a sheet for a front face body wherein another one of a pair of continuous tapes for opening/closing chucks is each fused on the neighborhoods of both ends of the underside so as to face to one of the continuous tapes is overlayed on the sheet for the back face body under a condition where the sheets for the gussets are placed between them and after the sheet for the front face body, the sheets for the gussets and the sheet for the back face body are integrally fused, the central position on the fused position of the sheet for the gusset and the central position in the width direction on the sheet for the front face body and the sheet for the back face body are cut. |
