| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for easily manufacturing trays having a simple structure, and the trays manufactured by this method. SOLUTION: A strip film is folded in two, and an open end part and a folded part are bent inward, and formed in a semi-gusset shape and a gusset shape respectively. One or two heat-sealed parts are intermittently formed on the strip film formed in the semi-gusset shape and the gusset shape with a specified length therebetween so that the heat-sealed parts are perpendicular to a conveying direction. The strip film is cut in the heat-sealed part or between the two heat-sealed parts. COPYRIGHT: (C)2005,JPO&NCIPI
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