| CPC B65D 33/02 (2013.01) [B31B 70/008 (2017.08); B65D 33/28 (2013.01); B65D 65/40 (2013.01); B65D 81/264 (2013.01); B31B 2170/20 (2017.08)] | 16 Claims |

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1. A pair of intermeshing rollers for creating phased deformations in thermoplastic bags, comprising:
a first intermeshing roller comprises a first plurality of ridges and grooves extending radially outward in a direction orthogonal to an axis of rotation of the first intermeshing roller; and
a second intermeshing roller comprises a second plurality of ridges and grooves extending radially outward in a direction orthogonal to an axis of rotation of the second intermeshing roller;
wherein:
the first intermeshing roller and the second intermeshing roller are sized and configured so that one revolution equals a width between respective side edges of the thermoplastic bags or a multiple of the width between the respective side edges of the thermoplastic bags; and
the second intermeshing roller comprises a region that is devoid of the second plurality of ridges and grooves, wherein the region is sized and positioned so that contact between the second plurality of ridges and grooves and the thermoplastic bags is limited to a partial width between the respective side edges of the thermoplastic bags.
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