Package making – Methods – Filling preformed receptacle and closing
Patent
1995-06-30
1997-03-04
Sipos, John
Package making
Methods
Filling preformed receptacle and closing
53478, 53487, 53268, 53281, 53298, 533295, B67B 328
Patent
active
056068476
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method for filling and closing a package open on one side, which is provided, at least on its edge which is to be closed, with sealable plastics material, in which the package is conveyed intermittently in a first direction of conveyance, is filled at a filling point, and thereafter a covering foil is placed on the edge and sealed thereto.
For filling and closing margarine or yoghurt packages it is known to fill packages having one edge made of plastics material and to convey them to a closure point where a covering foil of plastics material or metal or a multilayered covering foil is sealed thereto.
It has been shown in the case of high capacity machines that the packages just filled and not yet closed have to be greatly accelerated to achieve a large number of pieces per unit of time with the disadvantage that as a result contents slop out or splash out.
The object of the invention is to provide and to effectively improve a method of the type presently described, which significantly reduces and preferably indeed prevents the risk of splashing of contents during filling and closure of the packages despite high output.
This object is solved according to the invention in that the package is brought to a complete standstill in the filling point, wherein in the filling point a hole in a web of covering foil is arranged at a height above the package, in that during this complete standstill of the package and the web of covering foil the package is filled through this hole, the web of covering foil is moved forwards in a second direction at an angle with respect to the first direction of conveyance over the conveyor belt until the entire opening, including the edge of the package, is covered by the covering foil material, and after punching out of a covering foil this is sealed onto the edge of the package still during the complete standstill, after which the package is moved further along the conveyor belt, while the web of covering foil remains at a standstill. The essential feature of the invention is that the package is brought to a complete standstill, during which the package is filled and subsequently closed. Only after closure of the package is it accelerated and moved further along in the said first direction of conveyance. Acceleration of the unclosed but already filled package is advantageously impossible according to the invention. In this way the risk of splashing is eliminated in a surprising manner. A device operating according to such a method can thus be set up for a correspondingly high capacity.
The further essential concept of a solution according to the invention is in the web of covering foil moved at an angle with respect to the first direction of conveyance, which is moved independently of the package and relatively with respect thereto. A hole is arranged in the web of covering foil and this hole is placed over the open side of the package to be filled, whereafter the said complete standstill begins. On commencement thereof the package can be and is filled from above through the hole. While the filled package remains stationary, the web of covering foil is moved along until there is no hole or recess present over the opening of the package to be closed, but instead covering foil material covers over the entire package, including the edge of the package. Then, still during the complete standstill of the package, a stamping device is set in motion which punches out the covering foil, which in the course of said motion is sealed to the edge of the package shortly afterwards. Only now is the complete standstill time ended and the package can be moved further in the said first direction of conveyance after initial acceleration with the aid of the conveyor belt. The contents can no longer slop over the edge of the package.
In addition it is particularly advantageous when according to the invention the hole in the web of covering foil is formed by the punching out of a covering foil. It has presently been described with respect to the forward movement of the web of c
REFERENCES:
patent: 3491510 (1970-01-01), Sternau
patent: 4599851 (1986-07-01), Williams
patent: 5054265 (1991-10-01), Perigo et al.
patent: 5272854 (1993-12-01), Ye et al.
Joensson Leif T.
Ros en Ake
Osburn A. Ray
Paradiso John
Sipos John
Tetra Laval Holdings & Finance S.A.
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