US3437255A

US3437255A - Packing box

Info

Publication number: US3437255A
Application number: US648834A
Authority: US
Inventors: Ernest Eltschinger
Original assignee: Cartonnagenfabrik Freiburg AG CAFAG
Current assignee: Cartonnagenfabrik Freiburg AG CAFAG
Priority date: 1966-07-01
Filing date: 1967-06-26
Publication date: 1969-04-08
Anticipated expiration: 1986-04-08
Also published as: CH440109A; NL6708976A; BE700591A; GB1174949A

Description

April 8, 1969 E. EwscHaNGER PACKING BOX Filed June 26, 1967 INVENTQR Ernest Elrschmger United States Patent Ofice 3,437,255 Patented Apr. 8, 1969 ,597 Int. Cl. B65d 13/00, /48

US. Cl. 229-23 5 Claims ABSTRACT OF THE DISCLOSURE A packing box having a container of plastic material connected to a bottom portion of a cardboard carrier of the box by means of lugs of the carrier frictionally engaging into hollow walls of the container.

This invention relates to a packing box having a lid and a bottom made of cardboard and a container made of plastic material connected to the bottom. Packing boxes of this kind, the containers of which are subdivided into separate compartments by separating walls, are used for instance for dispatch of watches, but the invention is not limited to this design or use.

Prior packing boxes of this type have a flat bottom to which the container of plastic material is cemented. This design is relatively expensive and complicated in production, because besides the necessity to apply the adhesive, the packing boxes must be handled and stored with care after applying the containers to the bottom until the cementing has sufficiently set.

It is the object of the present invention to avoid the disadvantages mentioned above. The packing box according to this invention is characterized in that the container has hollow walls open at the lower end and is interconnected with the bottom by upwardly extending portions of the bottom engaging into said Walls. Due to this design it becomes possible to connect the container to the bottom exclusively by adherence in that the bottom portions are maintained in the walls by friction.

One embodiment of the packing box according to this invention is shown by way of example in the drawing. The box has a lid 1 of which the rims 2 are interconnected in the corners by clamps. The rim 2 of the lid at the longer side has a cut-out 3. The lid 1 is interconnected by fold lines 4 and 5 and a connecting strip 6 with a bottom having a rectangular bottom area 7 from which lugs 9 extend along fold lines 8 from the three sides not connected to the lid. Slightly outwardly staggered cuttings 10 separating the lugs 9 from the bottom area 7 are provided between the particular fold lines 8. In this way tongues 11 slightly project outwardly from the bottom area are formed.

The container 12 made of plastic material, for instance polystyrene, has hollow side walls 13 and separating walls 14 open at the lower end, so that separate compartments are formed. At the shorter sides and at the front longer side the outer wall portions have at their lower end a ledge 15 projecting outwardly which forms a stop shoulder 16 for the lid rims 2. Along the ledges 15 the material extends toa somewhat lower level than on the bottom area of the container so that the ledges cover the tongues 11 and are supported by these tongues. In this way the ledges obtain the necessary stability.

The lugs 9 provided at the smaller sides and at the front longer side of the bottom are bent upwardly as shown at the right in the drawing and engage into the hollow outer walls of the container 12. The free width of the hollow spaces of the container walls is so measured that the lugs 9 are held between these walls with slight friction. Since the contacting surface of the lugs with the container walls is relatively large, the adhesion is ample for sufficiently strong connection of the container 12 with the bottom of the package part made of cardboard. When the lid 1 is closed, its rims 2 rest on the shoulder 16 of the ledge 15 so that the position of the lid is determined. The cut-out 3 facilitates seizing of the lid for opening of the package box.

Connection of the bottom with the container may be effected in another way. As an example some lugs may be cut from the bottom area, which are suitable for engaging into separating walls 14 or into the back wall of the contain-er. However it is preferable to provide connecting lugs 9 at the rim of the bottom area extending through the full length of the side, because handling of the parts of the package for assemblage of the container with the bottom is substantially simplified when the number of lugs 9 to be erected is as small as possible. Further, the bottom area is not weakened by the disposition of the lugs 9 at its rim.

While the lid 1 of the illustrated box is assembled with the bottom area 7, a separate, removable cover may be provided, in which case the bottom area only serves for stiffening the container 12. Hereby the container may preferably be formed with a stop shoulder 16 on all sides, on which the cover rests in its closed position.

What is claimed is:

1. Packing box comprising a lid and a bottom made of cardborad and a container made of plastic material connected to the bottom, said container having hollow walls open at the lower end and said bottom having upwardly extending lugs on its three sides not connected to the lid, said lugs frictionally engaging into the hollow rim of the container thereby connecting the container to the bottom.

2. Packing box according to claim 1, characterized in that the lugs are separated in places from the bottom area and that the bottom area has tongues projecting outwardly beyond said lugs, which support an outwardly projecting lower ledge of the container rim.

3. Packing according to claim 1, characterized in that the container is subdivided into separate compartments by hollow separating walls.

4. Packing according to claim 1, characterized in that the lugs have each a length corresponding to the length of the adjacent side of the bottom area.

5. Packing box comprising a lid and a bottom made of cardboard, a container made of plastic material and 2,765,973 10/1956 Goldstein 229-33 having hollow walls open at their lower end and at least 2,990,998 7/1961 Barclay 220-42 X one bottom portion, lugs on said bottom made of card- 3,032,927 5/1962 Kobs 220-42 X board extending upwardly, said lugs frictionally engag- 3,342,399 9/1967 Reynolds 229-23 ing into said hollow walls thereby connecting the con- 5 tainer to the bottom of cardboard. FOREIGN PATENTS References SWGdCl'l.

UNITED STATES PATENTS 10 DAVIS T. MOORHEAD, Primary Examiner. 1,072,643 9/1913 Peck 229-28 US Cl XR 1,922,571 8/1933 Deling 22942X l 2,619,276 11/1952 Gibbons 229-33 229-28