US 12,459,714 B2
Multi-film thermoplastic bags with zones of contact areas having variable lamination
Sarah J. Steenblock, Cincinnati, OH (US); Matthew W. Waldron, West Chester, OH (US); Edward B. Tucker, Yorkville, IL (US); Shaun T. Broering, Fort Thomas, KY (US); Deborah K. Fix, Maineville, OH (US); and David A. Bailey, Cincinnati, OH (US)
Assigned to THE GLAD PRODUCTS COMPANY, Oakland, CA (US)
Filed by THE GLAD PRODUCTS COMPANY, Oakland, CA (US)
Filed on Jan. 29, 2024, as Appl. No. 18/425,798.
Application 18/425,798 is a continuation in part of application No. 17/167,390, filed on Feb. 4, 2021, granted, now 11,970,310.
Application 17/167,390 is a continuation in part of application No. PCT/US2020/024143, filed on Mar. 23, 2020.
Claims priority of provisional application 62/825,520, filed on Mar. 28, 2019.
Prior Publication US 2024/0166415 A1, May 23, 2024
Int. Cl. B65D 65/40 (2006.01); B32B 3/30 (2006.01); B32B 7/022 (2019.01); B32B 27/08 (2006.01); B65D 33/02 (2006.01); B65D 33/28 (2006.01); B65F 1/00 (2006.01)
CPC B65D 65/40 (2013.01) [B32B 3/30 (2013.01); B32B 7/022 (2019.01); B32B 27/08 (2013.01); B65D 33/02 (2013.01); B65D 33/28 (2013.01); B65F 1/002 (2013.01); B32B 2439/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A multi-film thermoplastic bag comprising: a first multi-film sidewall comprising a first thermoplastic film layer and a second thermoplastic film layer; a second multi-film sidewall comprising a third thermoplastic film layer and a fourth thermoplastic film layer; and a zone of contact areas comprising a first region, second region, and a second third region, wherein: contacts areas in the first region have a first lamination strength; contact areas in the second region have a second lamination strength that is greater than the first lamination strength; contact areas in the third region that have a third lamination strength that is greater than the second lamination strength; and each contact area in the zone of contact areas comprises a flat, in-plane area bonding the first thermoplastic film layer and the second thermoplastic film layer together.