Plastic bag with gusset folds and perforations

US4491959A · kind A · utility

Assignee

• Wavin B.V. · NL

Inventor

• Gustaf G. Loefberg · Landskrona, SE

Key dates

• Filing date: Apr 22, 1983
• Grant date: Jan 1, 1985
• Expiry date: Apr 22, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D31/10
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A plastic bag 1 with gusset fold parts 7, 8; 7a, 8a bounded by a central gusset fold edge 3, 3a and outer gusset fold edge 4, 5; 4a, 5a, is provided with a transverse seal 6 and first fold part seals 9, 10, 11, 12 at either side of the bag. Perforations 14 are present in the first and second gusset fold parts 7, 7; 7a, 8a in the area bound by said first fold part seals 9, 10, 12, 12, imaginary lines 15, 15a and the central gusset fold edges 3, 3a. The imaginary lines 15, 15a extend parallel to the transverse seal 6 and through the intersection of the first fold part seals and outer gusset fold edge 4, 5; 4a, 5a. Similar perforations 14 may be present at the other side of the bag in the region of the gusset fold parts bound by the central gusset fold edge 3, 3a, second fold part seals 16, 17, 18, 19 and imaginary lines 26, 26a extending parallel to the transverse seal 6 and through the intersection of second fold part seals 16, 17, 18, 19 and outer fold edges 4, 5; 4a, 5a.