DE1008197B - Packaging box made of clear plastic material for writing tapes or the like. - Google Patents

Description

Packaging box made of clear plastic compound for writing tapes or the like

The invention relates to a packaging can made of clear plastic compound for writing ribbon rod thin-walled can halves, which are placed around the seam by a Closure strips are held together immovably, and consists in that one Closure strips made of a thermoplastic material that hardens after attachment is anchored in annular grooves arranged on the outer surface of the can halves.

Writing tapes are mainly packaged in such a way that initially the coil with the writing tape is wrapped in metal foil or glass skin. When packing in glass skin (pleating), the film wrinkles around the spool, and a remaining, circular opening is made by sticking a seal sealed from paper or glass skin.

The film creates an air seal, which is, however, quite imperfect is. The pre-packed spool is put into a solid box or box made of cardboard, Sheet metal, pressed or other plastics, some of which are also transparent, laid. This solid, additional packaging is required to protect against mechanical stress. Cans or boxes are usually still with a paper banderole, a label, a lacing with a seal and possibly also with export surrounded by a self-adhesive tape. In the case of transparent cans, stuck on or underlaid labels used, of which the underlaid by the Illateria.l can be seen through it.

With regard to the existing despite the double packaging Disadvantages, such as insufficient airtightness, lack of guarantee against counterfeiting of the content the package, high price of the package, difficulties due to too many types of packaging etc., one has gone over to it, as the only packaging cans made of clear plastic mass to use the one glued around the outer seam between the lid and the base transparent film strips are closed. Although unmistakable from the previous packaging advantages are achieved, both in terms of effect as well as from an economic point of view, the solution to the packaging question still remains unsatisfactory, because the transparent can made of plastic compound is with respect to the material and uneconomical to manufacture. First are for each can two different parts, namely base and cover, required, second is the stepped edge of the lower part, over which the cover grips, in the production expensive and requires a very considerable thickness of at least the can jacket. aside from that the double wall created by the lid reaching over the edge of the can disturbs the view of the contents of the can.

These disadvantages would be eliminated or substantially reduced possible if you choose instead of the expensive and complicated box described above clear plastic mass takes such from the same mass that the Can made of two completely identical, butt-stacked, thin-walled can halves which are held together by a closure strip placed around the seam will. This is forbidden, however, because it does not guarantee an absolutely airtight and secure closure, as the can halves are pressed together from the inside or outside can move, or the closure strip by unintentional External destruction can become ineffective.

It has now been found that it is possible to make one out of two completely the same halves made of crystal-clear plastic compound for the one here To use the present purpose, if you touch the closure as a fastener Attachment of hardening thermoplastic material in on the outer surface of the can halves arranged annular grooves anchored. In this way, such a stable closure is created, that neither an intentional loosening of the lock without visible traces can, nor an unintentional destruction of the lock or a shifting of the can halves is possible by pressure from the inside or outside.

The security of the lock can be increased by that the grooves of both can halves together when the can halves are placed on top of one another form a complete Ringrlut, on whose Basic ridge-like Elevations are provided for better anchoring of the plastic strip.

In this way, the plastic strip is completely protected in the Ring groove and is perfectly anchored at the bottom of the same. In addition, is correct Arrangement of the strip-like elevations just at the seam of the can halves the strongest part of the plastic strip.

The drawing shows an exemplary embodiment of the subject matter of the invention shown. It shows Fig. 1 a partial section through the with the thermoplastic Plastic strips to be closed can in the unlocked state, Fig. 2 this Partial section with the can closed.

In the embodiment shown in Figs. 1 and 2, the can halves have a fret-like reinforcements at their edges d. These have reinforced edges d Grooves e, with the grooves in the example shown directly on the one on top of the other The edges of the halves a lie and collide when the parts a are placed on top of one another and so form a complete groove. To ensure a secure connection of the parts, have the grooves e on their base strip-like, all-round elevations f. Of course, the grooves can also have any other configuration. The grooves e are, as can be seen from Fig. 2, with a thermo- plastic Filled with plastic, this advantageously being in a liquid or pasty state is introduced. After hardening, this plastic forms an all-round Strip that securely anchors the two can halves a together.

Claims (2)

PATENT CLAIMS: 1. Packaging can made of crystal-clear plastic material Od for writing tapes thin-walled can halves, which are placed around the seam by a Closing strips are held together immovably, characterized in that that a fastener strip made of a thermoplastic that hardens after application Plastic anchored in ring grooves arranged on the outer jacket of the can half is. 2. Packaging can according to claim 1, characterized in that the Ring grooves of both can halves when the can halves are placed one on top of the other Form complete annular groove, on the basis of which strip-like elevations are provided are. Printed publications under consideration: German Patent No. 277 620; Swiss patent specification No. 247 136.