Two-chamber envelope package

作者: Hans Hoeller

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摘要: A two-chamber flat envelope for packaging various goods is proposed, the chambers of which can be opened uniformly purpose filling. The having two outer walls and a separating partition has plural seams at edges joining these to one another. Furthermore first seam, joins wall, second other each being located predetermined distance from side seam.

参考文章(1)
Howard A Rohdin, Bag and method of making same ,(1944)