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US 4,892,223 AGranted
Process of making a lined container and the product
AssigneeUnipac, Inc.
InventorDavid L. DeMent
Life of this patent
Estimating the term…
Abstract
A lined container is formed by providing a tubular structure having vertically extending sides, a top edge and a bottom edge. Horizontal slits are formed in the side walls with the slits being near the top edge. A flexible bag liner is inserted in the container and the open end is pulled around the outside top surface of the tubular container and the edges are stuffed through the slits which frictionally hold the liner in operative position.
Claims18
A container comprising,
- a vertically extending side configured to form a vertically extending fiberboard tube having multiple corners which is open at the top,
- a liner bag located in said tube, the liner being closed at the bottom and open at the top,
- means for mechanically locking the liner to the upper end of the tube, said locking means comprising at least two horizontal slits through the vertical side,
- and spanning at least two of said corners, a score line extending vertically from each end of each slit to the top of the tube, said score lines serving as hinges for the flexing of the strip of sidewall between the slit and the top of the container, the straight line distance between the ends of each slit being less than the length of the slit along the vertical side,
- said slits being spaced from said top a distance greataer than about one-half inch when the container is formed of double wall fiberboard and greater than about one and one-half inches when the container is formed of single wall fiberboarad,
- the open top of the liner bag extending from inside the tube, over the top of the tube, and down the outside of the tube,
- portions of the liner extending from outside the tube, through each of said slits and into the inside of the tube, the portions of the liner extending through said slits being frictionally engaged by the edges of the slits to minimize relative movement between the slit edges and the contacting portion of the liner.
4 more elements
A process for assembling a lined tubular container comprising,
- providing a tubular fiberboard container having a vertically extending side with multiple corners, a top edge and a bottom edge,
- said container having at least two horizontally extending slits in said side, and spanning at least two of said corners, a score line extending vertically from each end of each slit to the top of the tube, said score lines serving as hinges for the flexing of the strip of sidewall between the slit and the top of the container, the straight line distance between the ends of each slit being less than the length of the slit along the vertical side,
- said slits being spaced from said top a distance greater than about one-half inch when the container is formed of dougle wall fiberboard and greater than about one and one-half inches when the container is formed of single wall fiberboard,
- providing a flexible bag liner having a closed bottom and an open top, the open top of the bag terminating in a bag edge,
- inserting the bag into the container with the closed bottom of the bag nearest the bottom edge of the container and the bag edge near the top edge of the container,
- pulling the upper portion of the bag from inside the container over the top edge and then downwardly to form an inverted U-shape with the bag edge outside the container,
- pushing the container side inwardly at locations below the top edge and immediately above the slits to form openings through said side, said pushing being of a degree that the strip of fiberboard pushed will be displaced and remain displaced without mechanical pressure to allow the openings to remain open,
- inserting a portion of the bag edge through said openings,
- pushing the inside of said container side outwardly at said locations to close said openings and thereby frictionally lock said bag to said container said strip remaining in the outward position with the opening closed without outside mechanical force, and
- forming the tubular container from a plurality of planer panels joined together at their edges to form corners,
- cutting the slits at the corners with a V-shaped pattern with the apex of the V at the corner formed by two joined panels.
8 more elements
Dependencies are inferred from the claim text.