Envelopes – wrappers – and paperboard boxes – Paperboard box – Cylindrical or conical body – or wall structure
Patent
1993-07-08
1995-01-24
Elkins, Gary E.
Envelopes, wrappers, and paperboard boxes
Paperboard box
Cylindrical or conical body, or wall structure
229 23R, 2291982, 2291161, B65D 314, B65D 328
Patent
active
053835956
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION OF INVENTION
This invention relates to rigid boxes made of cardboard or like materials and of the kind used primarily for the packaging of various types of product.
There is currently a requirement for rigid boxes suitable for the packaging of expensive consumer products. Traditionally, such boxes are formed from cardboard or the like which is covered with materials such as printed paper, fabric or foils.
One of the main limitations of traditional rigid box manufacture is the shapes that can be produced economically without resorting to expensive hand covering. For round and oval boxes typically a strip of board for this purpose is formed into a band by securing opposed ends together. It is difficult to form the required joint accurately by hand and where opposite ends of the band overlap it is difficult to avoid raw edges or bulges that are visible and detract from the appearance of the finished box.
Spirally wound or convolute wound boxes can be formed into rounds or ovals using a curled edge formed with a heated tool but limitations on size and shape and relatively high tooling costs restrict what can be offered.
It is an object of the present invention to provide an improved construction of rigid box which overcomes or reduces such problems.
According to the invention the peripheral wall of a box is formed from a continuous strip of material wherein at least adjacent to one end of the strip, a lateral marginal portion of such material is folded over an adjacent portion of the strip and secured relative thereto, the folded marginal portion at said one end of the strip defining in combination with said adjacent portion a recess, and the other end of the strip affording a tongue adapted to enter said recess, whereby the two ends of the strip may be brought together in abutting relation to form a continuous band by locating said tongue in said recess.
Preferably the tongue is off-set from said adjacent portion of the strip by a distance at least approximately equal to the thickness of the strip material so as to define a shoulder between the end of said adjacent portion and the tongue.
Most conveniently the tongue is formed at least in part as a longitudinal extension of said lateral marginal portion at the end of the strip opposite that at which the recess is formed. Alternatively or additionally the tongue may be formed at least in part as a longitudinal extension of a portion of the strip adjacent to said lateral marginal portion.
The lateral marginal portion of the strip may be folded over along the entire length thereof, and preferably longitudinal marginal portions are folded over at both longitudinal edges of the strip into either overlapping or non-overlapping relationship with each other. In the latter case, where the folded-over marginal portions do not overlap one another, the tongue and the recess may each comprise two parts, one part associated with each longitudinal marginal portion. However, in some cases each longitudinal marginal portion may afford a respective tongue and a respective recess. In such a case both tongues may be provided at the same end of the strip, and both recesses at the other end. However, a tongue and a recess may be provided at each end of the strip if desired.
Whilst the tongue is most conveniently formed as an integral extension of the strip, it may be formed from an additional piece of material secured to the strip. For example there may be a recesses formed at each end of the strip and a connecting piece affording a pair of said tongues may be secured in the two recesses.
The recess is preferably formed as an open sided pocket defined by a part of the lateral marginal portion overlying the adjacent portion of the strip. Alternatively the recess may be formed as rebate defined by a cut-away end portion of the lateral marginal portion.
In accordance with a particularly preferred feature of the invention, portions of the material at the opposite ends of the strip are folded over and secured to adjacent portions thereof to form a double thickness abutting
REFERENCES:
patent: 1239162 (1917-09-01), Cullen
patent: 1331330 (1920-02-01), Erickson
patent: 1617274 (1927-02-01), Romer
patent: 1947190 (1934-02-01), Cody
patent: 2006952 (1935-07-01), Klein
patent: 2133629 (1938-10-01), Meyer
patent: 2140932 (1938-12-01), Avery
patent: 2458578 (1949-01-01), Evans
patent: 2596218 (1952-05-01), Dennis
Concept Packaging Limited
Elkins Gary E.
LandOfFree
Boxes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Boxes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Boxes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1463406