Self-closing bag
AssigneeNinth Moon
InventorMarilyn Stern
Life of this patent
Estimating the term…
Abstract
A self-closing bag is disclosed as having front and rear sidewalls which are interconnected at their side edges and top and bottom. A spring strip holder in the form of a longitudinal slot extends from near a top edge to near a bottom edge of the bag on at least one of the front and rear sidewalls. The holder is designed to accept a self-rolling spring strip which has a concave top surface and convex bottom surface. The spring strip has the property of remaining straight when unrolled but self-rolling when it is slightly bent from its straight condition. The spring strip when provided in the bag serves to roll the top of the bag down to seal the bag once it is opened. When the bag is reopened, the user may straighten the spring strip again to thereby hold the bag in its opened condition.
Claims33
A self-closing bag comprising:
- front and rear sidewalls interconnected along their bottoms and opposite side edges;
- at least one of said sidewalls containing a bag closure holder extending longitudinally therealong from a point approximate to a top edge thereof to a point approximate to a lower edge thereof;
- and
- a self-coiling spring strip held by said holder, said spring strip operating to self-roll to thereby roll-up said sidewalls and close said bag, said self-coiling spring strip having a concave side and a convex side and the property that, when straightened, it holds its straightened shape, and when bent in a predetermined direction, it self-rolls to close said bag.
A self-closing bag comprising:
- front and rear sidewalls interconnected along their bottoms and opposite side edges;
- at least one of said sidewalls containing a bag closure holder extending longitudinally therealong from a point approximate to a top edge thereof to a point approximate to a lower edge thereof;
- a self-coiling spring strip held by said holder, said spring strip operating to self-roll to thereby roll-up said sidewalls and close said bag, said spring-strip having a concave side and a convex side and said spring-strip being mounted in said holder with said convex side facing the bag interior.
A spring strip for use in a self-closing structure, said spring strip comprising:
- an elongated self-coiling member having a concave side, a convex side, and a width which expands when said self-coiling member self rolls, said elongated member having two stable states, a first when said member is straightened and a second when said member is bent from a straightened state to initiate and promulgate self-coiling;
- and,
- means provided on at least a portion of said elongated member for preventing an initiation of self-coiling by said member at said portion.
A self-closing bag comprising:
- front and rear sidewalls interconnected along their bottoms and opposite side edges;
- at least one of said sidewalls containing means for holding a self-coiling spring strip;
- and
- a self-coiling spring strip held by said holder in an orientation whereby said spring strip operates to self roll to thereby roll-up said sidewalls and close said bag, said self-coiling spring strip having a concave side and a convex side and the property that, when straightened, it holds its straightened shape, and when bent in a predetermined direction, it self rolls to roll up said sidewalls and close said bag.
Dependencies are inferred from the claim text.