| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make recycling more efficient by recovering and carrying empty plastic bottles, which have conventionally been crushed in the vertical direction by forming the body parts of the bottles into a bellows-shape, by a large quantity. <P>SOLUTION: Folding lines comprising a plurality of grooves are provided from the peripheral surfaces being confronted with each other to the bottom surface of the body part, and the end parts of the folding lines reaching the bottom surface are made discontinuous. A parting line comprising a sinusoid is provided in the direction of crossing the folding lines at the discontinuous part. For the central part of the bottom surface which is defined with the folding lines and the parting line, parts being close to the mountain part or the valley part of the parting line are made thicker, and parts being away are made thinner. Thus, a protruding part and an indented part facing the folding lines and the parting line are alternately formed on the peripheral edge part of the bottom surface. <P>COPYRIGHT: (C)2004,JPO</p> |
