| 摘要 |
An apparatus for the folding and flat-sealing of the bottom of a liquid-proof package with a roof-shaped folded closure and inwardly folded gable walls starting with a tubular package blank, comprising a plurality of mandrels for carrying the blanks, means for advancing the mandrels progressively through a plurality of stations to be operated upon, means for folding gables on the blanks, and means for folding the roof on each blank after a gable folding operation, the means for folding the gables and the roof being positioned to operate on a blank in the course of the passage of said blank on a mandrel between two successive stations. Cams are provided so that while the operative members of the folding tools move relative to the blank in order to effect their folds, the points of initial contact between the operative members and blank are substantially maintained throughout the respective folding operation to minimize possiblity of damage to the coating with which such blanks are provided. |
