Package making – Methods – Forming or partial forming a receptacle and subsequent filling
Reexamination Certificate
1999-10-18
2001-09-04
Vo, Peter (Department: 3721)
Package making
Methods
Forming or partial forming a receptacle and subsequent filling
C053S455000, C053S456000, C053S561000, C053S377600
Reexamination Certificate
active
06282870
ABSTRACT:
This application corresponds to French application 98.1298 of Oct. 16, 1998, the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
The present invention relates to a process for packaging products, particularly food, chemical or pharmaceutical products, to a device for practicing said process, as well as for a packaging box for products.
There are known numerous processes and apparatus for packaging products. Generally, there are used two rolls of strips of deformable material, the first strip being adapted to be shaped to constitute cavities and the second strip being adapted to be welded on the periphery of the cavities to constitute a lid and a sealed assembly protecting the food, chemical or pharmaceutical products contained in the cavities.
The preservation of the products can be prolonged by packaging the products under vacuum or under an inert atmosphere, by injection of a neutral gas at the welding station.
The document EP-0-652-155 A1 discloses a process, a device and a packaging box for food, chemical or pharmaceutical products, using a first strip of thermoplastic or thermoformable material and a second strip of thermoplastic or thermoweldable material.
SUMMARY OF THE INVENTION
The invention has for its object to improve the prior art, by permitting the use solely of a single band of thermoplastic or thermoformable material to package the products in sealed boxes.
The invention has for its object a process for packaging products in thermoformed boxes, from a single strip of thermoplastic or thermoformable material, comprising the steps of thermoforming cavities and associated covers in said strip, cutting along three sides about the covers, loading the cavities with products, pressing down the covers over the cavities and thermowelding the covers to the cavities to constitute boxes constituting said products.
According to other characteristics of the invention:
the process moreover comprises a step of pre-cutting between cavities and associated covers, to leave one or several attached portions forming a folding hinge;
the process moreover comprises a step of cutting out edges bordering the thermowelded cavities to the covers, to free individually one or several boxes containing said products.
The invention also has for its object a device for packaging products in thermoformed boxes, by using a single strip of thermoplastic or thermoformable material, comprising means for thermoforming cavities and associated covers in said strip, means for cutting out along three sides about said covers, means for loading the cavities with products, means for pressing down the covers over the cavities and means for thermowelding the covers to the cavities to constitute boxes containing said product;
according to other characteristics of the invention:
the device comprises means for pre-cutting out between cavities and associated covers to leave one or several attached portions forming hinges for folding.
the device comprises means for cutting out edges forming the thermowelded cavities to the covers.
the pressing down means for the covers over the cavities comprise at least one retractable rotatable finger.
the means for pressing down the covers over the cavities are preadjusted to raise the covers and to fold them down from an angle greater than 90° of arc.
The invention also has for its object a packaging box for products obtained by the practice of the process according to the invention by using a device according to the invention.
According to other characteristics of the invention, the cavity and the cover have edges having separate contours, so as to provide two tongues adapted to be spaced to facilitate opening the box.
REFERENCES:
patent: 4364220 (1982-12-01), Rausing
patent: 4387551 (1983-06-01), Cowan
patent: 5007231 (1991-04-01), Ingemann
patent: 5009056 (1991-04-01), Porteous
patent: 5369937 (1994-12-01), Logothetis
patent: 5419096 (1995-05-01), Gorlich
patent: 5496250 (1996-03-01), Fielder et al.
patent: 5603203 (1997-02-01), Robache
patent: 0 025 621 (1981-03-01), None
patent: 0 652 155 (1995-05-01), None
Mecaplastic
Tawfik Sam
Vo Peter
Young & Thompson
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