Package making – Means to open or erect receptacle – Means to open bag
Patent
1995-11-03
1998-01-06
Culver, Horace M.
Package making
Means to open or erect receptacle
Means to open bag
53570, 533891, 141114, 141166, B65B 4326, B65B 4328, B65B 4330, B65B 6704
Patent
active
057041920
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a guide mechanism for positioning a continuously flexible packaging web.
BACKGROUND AND PRIOR ART
There is need in the art for a mechanical guide mechanism opening the upper edges of the mouths of successively advancing packages of a, continuous flexible packaging web and thereby make them accessible for the supply of material therein.
EP-B1-0 054 564 discloses a guide mechanism of the above type. The guide mechanism includes guide members designed as rods along which a flexible packaging web is displaced. The guide rods are of a predetermined shape which is adapted to the size of the packaging blanks. When the dimensions of the openings of the packaging blanks are changed, the rods included in the guide mechanism are replaced by rods adapted to the new dimensions. The need for this exchange of rods reduces the flexibility of the guide mechanism.
SUMMARY OF THE INVENTION
The present invention provides a guide mechanism which, on changed dimensions of the openings of the packaging blanks, can be switched so as to adapt the distance between retainer devices for the edge portions of the packaging web to suit the size of the openings of the packaging blanks.
BRIEF DESCRIPTION OF THE FIGURES OF THE DRAWING
The present invention will now be described in greater detail hereinbelow, with reference to a number of Figures of the drawing, in which:
FIG. 1 is a perspective view of a portion of a packaging web;
FIG. 2 is a cross-section taken on line II--II in FIG. 1;
FIG. 3a,b show portions of a first embodiment of the guide mechanism in the region of the opening of packaging blanks, where the guide mechanism is composed of links;
FIG. 4a,b are cross-sections of mechanical guide members for guiding the packaging web where FIG. 4b also shows the upper portion of the packaging web;
FIG. 5a is a sectional view of a second embodiment of the guide mechanism taken along line 5a--5a in FIG. 5b, where the guide mechanism is provided with a mechanically stable guide member for opening a packaging blank;
FIG. 5b shows the guide mechanism of FIG. 5a seen from above;
FIG. 5c is a sectional view taken along line 5c--5c in FIG. 5a;
FIG. 6a shows a third embodiment of the guide mechanism from above and provided with a mechanically stable guide member and with an alternative version of the links in the guide mechanism;
FIG. 6b is a sectional view taken along line 6b--6b in FIG. 6a;
FIG. 7a shows a fourth embodiment of the guide mechanism seen from above; and
FIG. 7b is a side view of the guide mechanism in FIG. 7a.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
FIGS. 1 and 2 show one embodiment of a continuous packaging web or belt 20 of flexible material which has two opposing walls 21a,b and longitudinal first and second edges 22 and 23, respectively. The web includes a number of mutually subsequently disposed packaging blanks or pockets 26. The pockets each have a bottom portion at said first edge 22, and two connection zones or joints 25, occasionally designated transverse zones 25, which are transversally directed in relation to the longitudinal direction of the web and which form the side closures 25 of the pockets. In FIGS. 1 and 2, the web is shown with a folded-in bottom. The upstanding definition of the folded-in bottom has reference numeral 47 and corresponds to a center line of a sheet which has been folded together on the formation of the packaging web. Between the joints of two adjacent pockets or bags there is a transverse slot 27 which defines the pockets from one another. In certain embodiments, mutually adjacent pockets 26 are united by means of one or more bridges 75. In this instance, such bridges are as a rule disposed in the vicinity of the first edge 22 of the belt.
Each respective wall 21a,b includes two opposing edge portions 24a,b which extend in the longitudinal direction of the web at its said second edge 23, each one including a continuously retained member generally designed as a material thickening, 43a,b for cooperation with mechanical
REFERENCES:
patent: 4169345 (1979-10-01), Douwenga
patent: 4514962 (1985-05-01), Ausnit
patent: 4558556 (1985-12-01), Jostler
patent: 4665552 (1987-05-01), Lems et al.
patent: 4798041 (1989-01-01), Bentsen
patent: 4850178 (1989-07-01), Ausnit
Broden Ingemar
Jostler Jan
Culver Horace M.
Joker System Aktiebolag
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