Easy Open Apparatus and Method for Multi-Ply Bags
AssigneeStandard Multiwall Bag Manufacturing Co.
InventorsYuming Pang, Paul Lin
Life of this patent
Estimating the term…
Abstract
An easy open apparatus for multi-wall bags and a method for making such bags are disclosed. The bag has a closed end and an open end and the rear panel is stepped relative to the upper edge of the front panel. A tear-tape strip is adhered to an inner surface of a flap formed in the outer layer of the front panel and extends partly across the panel with ends of the tear-tape exposed. To open the bag, the user grasps one exposed end of the tear-tape and pulls it outwardly away from the bag, thereby tearing the outer paper layer across the flap to form a “pocket” or “handle” that the user may grasp to tear the bag open.
Claims20
An opener for a multi-wall bag having a closed bottom end, an open top end and a front panel and opposed rear panel, the bag defining a bag axis extending from the closed end to the open end and the multi-wall bag having an outer paper layer and an adjacent layer, comprising:
- an opener panel in the front panel defined by first and second spaced apart slits in the outer paper layer extending from an upper edge of the front panel along the bag axis, said opener panel having opposed first and second side edges defined by said first and second spaced apart slits and said opener panel having an inner-facing surface;
- a first and second pair of transverse spaced apart slits in the outer paper layer of the front panel, each slit of each pair of said transverse spaced apart slits extending transverse to the bag axis and to a respective one of the opposed first and second side edges of said opener panel;
- a strip of tape adhered to the inner-facing surface of the opener panel and extending completely across the opener panel in the direction transverse to the bag axis such that opposite ends of said tape extend beyond the first and second opposed side edges of said opener panel, said tape adhered to the inner-facing surface of said opener panel between each slit of each pair of said transverse spaced apart slits extending transverse to the bag axis;
- wherein said opener panel is adhered to said adjacent layer with said opposite ends of said strip of tape exposed.
The opener according to claim 4 wherein said adjacent layer is paper.
A method of forming a multi-wall bag having an opener, the bag defined by an outer layer and an adjacent layer and the bag having a closed bottom end, an open top end, a front panel and opposed rear panel, the bag defining a bag axis extending from the closed end to the open end, comprising the steps of:
- a) forming a bag having a front panel and opposed rear panel;
- b) cutting a pair of opposed and spaced apart slits in the outer layer of the front panel to define flap in the front panel, said opposed and spaced apart slits extending from an upper edge of the front panel along the bag axis, and said flap having opposed first and second side edges defined by said slits and said flap having an inner-facing surface;
- c) adhering a strip of tape to the inner-facing surface of the flap, so that said tape extends completely across the flap in the direction transverse to the bag axis such that opposite ends of said tape extend beyond the first and second opposed side edges of said flap;
- d) adhering the inner-facing surface of said panel to the adjacent layer with said opposite ends of said tape exposed.
An opener for a multi-wall bag having a bottom end, a top end and a front panel and opposed rear panel, the bag defining a bag axis extending from the bottom end to the top end and the bag having an outer layer and an adjacent layer, comprising:
- a flap in the front panel defined by first and second spaced apart slits in the outer paper layer extending from an upper edge of the front panel and parallel to the bag axis, said flap having opposed first and second side edges defined by said first and second spaced apart slits and said flap having an inner-facing surface;
- a tear tape extending along the inner-facing surface of the flap and extending completely across the flap in the direction transverse to the bag axis such that opposite ends of said tear tape extend beyond the first and second opposed side edges of said flap;
- wherein said flap is adhered to said adjacent layer with said opposite ends of said strip of tear tape exposed.
Dependencies are inferred from the claim text.