The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2015
Filed:
Mar. 14, 2013
Sonoco Development, Inc., Hartsville, SC (US);
Brent Bosman, Florence, SC (US);
Sonoco Development, Inc., Hartsville, SC (US);
Abstract
A flexible packaging laminate for a microwavable package has a built-in vent for steam. The vent is formed by an outer score line through the outer layer(s) of the laminate to define an outer flap, and a smaller-footprint inner score line formed through the inner layer(s) of the laminate, so that there is a marginal region of U- or V-shape bounded between the two score lines. A patch of pressure-sensitive adhesive is disposed between the outer and inner structures of the laminate such that PSA is present in the marginal region. Pressure exerted on the inner flap or plug created by the inner score line overcomes the PSA between the outer flap and the inner structure in the marginal region, causing the outer flap to be pushed out along with the inner flap or plug, thereby venting steam through the resulting opening.