Reusable air permeable packaging film

Details Reusable air permeable packaging film Reusable air permeable packaging film

2007-04-24

2007-04-24

Chang, Victor (Department: 1771)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

C428S063000, C428S131000, C428S137000, C428S138000, C428S155000, C428S172000, C428S343000, C428S346000, C053S440000

Reexamination Certificate

active

10711194

ABSTRACT:
A reusable, air-permeable packaging film formed of a layer of resilient and nontoxic material is disclosed. The packaging film includes a plurality of micro-gaps distributed within a pre-selected area on the packaging film, wherein each of the micro-gaps traverses thickness of the packaging film, and wherein, in a static state, i.e., no pressure/stress exerted on the packaging film, each of the micro-gaps comprises a split upper seam portion with edge ridges demonstrated on a top surface of the packaging film and a close lower seam portion communicating with the split upper seam portion. During microwaving, the pressure can be regulated at a relatively lower vapor transferring rate through the pre-selected area.

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