| 摘要 |
A cushioning conversion machine including a conversion assembly which converts a sheet stock material into a relatively less dense cushioning product. The conversion assembly includes a forming assembly, having an external forming device and an internal forming device positioned at least partially within the external forming device, the forming assembly inwardly turning lateral regions of the sheet stock material as the sheet stock material travels through the forming assembly in an upstream to downstream direction. The sheet stock material passes between the external forming device and the internal forming device as it travels through the forming assembly. The internal forming device has a central guide portion with a bottom guide surface which guides a central region of the sheet stock material as its lateral regions are inwardly turned, and a cascade portion having stages disposed above the bottom guide surface of the central guide portion. The stages define therebetween relatively relieved areas which facilitate the formation of creases in the lateral regions of the sheet stock material as it passes over the cascade portion of the internal forming device.
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