Window bag with polyester lining and method of forming same

US6033114A · kind A · utility

Assignee

• Bagcraft Packaging, L.L.C. · US

Inventors

• Charles T. Grimm · Orland Park, US
• James H. Allen · Covington, US
• Nancy Chico · Worth, US
• Gino Narduli · Norridge, US
• Karen Susan Teter · Woodridge, US
• Timothy J. Hannon · Clarendon Hills, US
• Donald E. Wolski · Tinley Park, US
• Harley Dubeck · Downers Grove, US
• Ernest R. Herzog · Westchester, US
• Thomas William DePretoro · Pompano Beach, US

Key dates

• Filing date: Jan 20, 1998
• Grant date: Mar 7, 2000
• Expiry date: Jan 20, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D33/04
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An ovenable bag for packaging heated, greasy food items for display is formed of a laminate having a thin, transparent, polyester inner layer and a relatively thicker and stiffer opaque outer layer formed of a foldable and printable material. The wall structure is generally tubular and is folded to define front and rear panels and gusseted side panels, one end of the structure being folded, heat sealed and then folded again and adhesively secured. The window portion extends the length of the front panel of the bag centrally thereof. The outer layer is bonded to the inner layer along the entire area of the outer layer except for an optional tear strip which may be disposed along one edge of the window. The bag may also be heat sealed along the fold lines joining the side panels to the front and rear panels for added stiffness.