Special receptacle or package – Evacuated
Patent
1991-09-27
1993-09-28
Foster, Jimmy G.
Special receptacle or package
Evacuated
156276, 220422, 493100, B65D 2514
Patent
active
052480399
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a package blank and to a method for producing a package.
BACKGROUND OF THE INVENTION
Package blanks of the type of the present invention comprises an assembly formed by a sealed and resilient film or a like serving as a surface material and by a substantially deformable inner material consisting of particles, the inner material being accommodated inside a space confined by the surface or wrapping material. The deformable inner material has a volume which is less than that of the space confined by the surface material. A package blank is accompanied by at least a single article to be packaged which is substantially enclosed by the package blank through the deformation of the package blank. In order to produce a package, pressure is reduced in the space defined by the surface material, resulting in the deformable inner material stiffening and/or its particles being substantially immobilized relative to each other. This is how to produce a package, wherein a package blank enclosing an article provides an essential protection therefor during the package handling.
A package blank as described above is disclosed in the publication GB-1 095 311. In a method described in the cited publication, a negative pressure is produced by using a connector formed in the surface material and connected to a vacuum-creating device. The cited method is unreliable and tedious and not applicable to modern mass-production industry.
SUMMARY OF THE INVENTION
An object of this invention is to introduce a package blank, which is first of all very simple to manufacture in mass production and which, on the other hand, is very well adaptable to a package-erecting stage, particularly when applying mass production for manufacturing packages comprising a package blank and at least a single article to be carried therein. In order to achieve this object, a package blank of the invention is primarily characterized in that a film or a like surface serving as a wrapping material is provided with a stiffening plate or a like element adapted to receive a piercing means. The piercing means is adapted to pierce the wrapping material forming film or the like during the course of pressure reduction. The stiffening plate or a like element provides communication between a wrapping material confined space and a vacuum-creating mechanism. A stiffening plate facilitates the penetration of the piercing means, such as an injection needle, into the underpressurized space so as not to form an unnecessarily large hole in the wrapping material since the stiffening plate prevents the movements of a piercing means relative to the package blank. In addition, the stiffening plate provides a good base for closing the hole formed by a piercing means by using, for example, an adhesive tape or the like after underpressurization is completed and a piercing means removed from the hole. A suitable mechanism can be used for effecting the removal of the piercing means and the sealing of the hole as a single operation in a manner that underpressurization is maintained in the wrapping material confined space for a certain period of time.
Another object of the invention is a method for producing such a package. According to the method, upon a package blank is laid at least one article which is substantially encircled with a package blank whose wrapping material confines a space having a reduced pressure. A method of the invention is primarily characterized in that a piercing means is inserted at the initial stage of depressurization through a stiffening plate or the like element fitted in the surface of a package-blank wrapping material into a communication with a wrapping material confined space. With the piercing means in communication with this space. The pressure reduction is effected in the space confined by the wrapping material.
During the course of removing the piercing means, a penetrating hole produced by the piercing means is closed by means of a sealing member.
A method as described above facilitates the
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patent: 4880119 (1989-11-01), Simon
patent: 5009318 (1991-04-01), Leinoy
Devipack Oy
Foster Jimmy G.
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