Title: Synthetic plastic foam carton liners

Abstract: Shipping carton liner and method for making the same, which consists of a unitary sheet of synthetic plastic foam composed of a pluality of panels separated by grooves or score lines of sufficient depth and of a configuration to enable the panels to be swung from coplanar to mutually perpendicular orientation. A resilient layer is applied to the foam, at least along the score line portions thereof and is characterized by a tear strength and flexibility greater than said foam. In one embodiment, the resilient layer is obtained by forming a densified skin on the surface of the foam. The layer of resilient material and the score lines form a hinge for the pivotal movement of the panels. Apparatus is also provided for fabricatng such liners or cartons.

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Inventors: Buonaiuto, Robert B. (Ipswich, MA, US)

Application Number: 525586
Filing Date: 1974-11-20
Publication_date: 1976-09-14
Assignee:
Primary Class(es): 427/289 493/79, 493/148
Other Classes:
US Patent Ref:

1937858	Dec, 1933	Taber	427/289.
3092529	Jun, 1963	Pearson	156/257.
3251382	May, 1966	Tatsch	220/9.
3442415	May, 1969	Glass	220/334.
3595287	Jul, 1971	Indermark	83/5.
3605534	Sep, 1971	Barr	83/5.
3675808	Jul, 1972	Brink	229/30.

Other Refs:
Primary Examiner: Coan, James F.
Assistant Examiner:
Attorney: