| 摘要 |
A method for producing an enclosed, multipaneled envelope from webs of material in a manner such that the desired multipaneled shape of the envelope can be formed by a single peripheral application of a platen sealing device to positioned webs comprising a first web, and second web with at least one folded web interposed therebetween. Both geometric and nongeometric multipaneled envelopes can be produced in this manner from materials suitable for filling with a lighter-than-air gas to form toy balloons and the like. |
