# US 6,857,560 B2 · Collapsible container with bottom discharge

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- Number: US 6,857,560 B2
- Document ID: US6857560B2
- Status: Granted
- Kind: B2
- Application number: 10/692,059
- Filed: 2003-10-24
- Published: 2004-07-08
- Granted: 2005-02-22
- Earliest claimed: 2003-01-06
- Assignees: Container Packaging Corp
- Inventors: Kenneth Kutner
- Web page: https://patentgrep.com/patent/US6857560B2

## CPC

- B65D 5/723: {Sliding elements for covering and uncovering discharge openings of containers, e.g. slide-closures}
- B65D 5/3607: {formed by folding or erecting a single blank}
- B65D 19/20: made wholly or mainly of paper
- B65D 2313/02: of hook-and-loop type
- B65D 2519/00159: Paper
- B65D 2519/00333: contact surface having a stringer-like shape
- B65D 2519/00338: contact surface having a discrete foot-like shape
- B65D 2519/00497: whereby at least one side wall is made of one piece
- B65D 2519/00597: integrally formed
- B65D 2519/00646: by means of hinges
- B65D 2519/00805: Means for facilitating the removal of the load
- B65D 2519/0092: whereby all side walls are hingedly connected to the base panel and to each other to allow automatic collapsing and re-erecting, e.g. by means of folds provided in the side walls and or in the base panel
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

## Abstract

A fibrous collapsible shipping container for transporting small articles and particulate material and discharging the same under gravity through a bottom wall opening after the horizontal movement of a sliding door. The container may include a liner element to provide increased rigidity where the loaded contents are relatively heavy. In a second embodiment, the container includes a second medially positioned bottom wall and sliding door to provide incremental discharge of the contents, as desired.

## Claims

### Claim 1

In a collapsible fibrous container for use in transporting and delivering particulate materials and molded articles, the container having vertical front, rear and side walls, and a bottom wall interconnected with said vertical walls to form a rectangular enclosure; said container having a removable cover with an integral peripheral side wall, and a foldable liner engaging the inner surfaces of said vertical walls, the improvement comprising: said cover being formed of double wall corrugated materials having flutes of varying width for each wall to provide increased rigidity; said liner being formed of corrugated triple wall material, with the corrugations being in mutually congruent relation to provide maximum supporting strength to said container while providing a convenient forming of fold lines.

### Claim 2

In a collapsible fibrous container for use in transporting and dispensing particulate materials and molded articles, the container having vertical front, rear and side walls, and a bottom wall interconnected with said vertical walls to form a rectangular enclosure, the improvement comprising: said bottom wall having a through opening therein for the passage of contents of said container therethrough, and a slidably mounted generally planar panel selectively overlying said opening for controlling the flow of said contents to said opening; said front wall having a slotted opening for introduction of said panel to overlie said opening in said bottom wall, said panel forming a manually engageable handle projecting outwardly of said front wall; and a foldable liner member positioned inwardly of said rectangular enclosure, said liner member having a recess selectively positionable to overlie said slotted opening.

### Claim 3 (depends on 2)

The improvement in accordance with claim 2, including a second foldable liner positioned above said first-mentioned liner to form a peripherally located interstice therebetween; a second bottom wall supported within aid interstice having an opening therein, said front wall having a second slotted opening therein, and a second planar panel overlying said second bottom wall and slidable within said second slotted opening.