Slotting corrugated carton and box blank

Slotting corrugated carton and box blank

 

In the operation of the slotting and creasing machine, the knives 17 and 18 of the upper head 6 are preferably mounted in diametrically opposed-relation, as shown in Figures 1 and 5, and are so spaced with relation to the width of the blank in the direction of blank travel, that as each blank is fed between the heads 6 and 7, the opposed marginal edge portions 35 and 36 of each blank will be inwardly slotted as shown in Figure 7, and at the same time the blanks will be creased between the slots, as indicated at 31.

In a conventional form of blank, such as shown in Figure 7, three sets of combined creasing and scoring heads are utilized, as each pair of slots, and their respective creases, require one complete set of such heads. The heads are axially adjustable on the shafts 8 and 9, whereby the spacing between the slots in a direction lengthwise of the blank may be varied to suit any size blank. The diameters of the two heads are such that for each revolution thereof a blank passes therebetween and is slotted on its leading and trailing edges, as shown in Figure 7. The circumferential adjustment of the knife 18 makes it possible to quickly adjust the spacing of the knives to suit the height of the blank, as herein before stated.
Each blank is also provided with transversely extending creases 30, which intersect the inner ends of the slots cut in the blanks, as shown in Figure 7, and which define the height of the box when set up for use. The creases 30 are usually formed in a separate operation in a different type of machine either before or after the blanks are slotted and creased parallel to direction of travel through the slotting machine.

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