Package making – Apparatus for forming or partially forming receptacle and... – Forming a receptacle around a mandrel or former and removing...
Patent
1982-08-17
1985-07-16
Sipos, John
Package making
Apparatus for forming or partially forming receptacle and...
Forming a receptacle around a mandrel or former and removing...
53266R, 53379, 53388, 493164, 493247, B65B 302
Patent
active
045288038
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a machine for the fabrication, filling, and sealing of packages, whereby the outer medium of packages, comprised of a shaped and welded flexible sheet of material, is filled and sealed, said machine comprising an expanding mandrel carousel, and at least one filling carousel disposed thereafter in the flow of work, said filling carousel having a filling station and a top seam welding station.
Such machines are employed mostly for manufacturing containers for liquids such as, e.g., milk, juices, and the like. The sheet of material is a continuous sheet, which may be, e.g., paper coated with plastic, is drawn off from a supply roller. The individual package exteriors are fabricated from said sheet by cutting and welding it. Each package exterior is held on an expanding mandrel of an expanding mandrel carousel.
In a known machine of the type described initially above (U.S. Pat. No. 3,918,236), the package exteriors, having been thus shaped, and now open only at the top, are alternately transferred to two subsequent filling carousels, in each of which the package exteriors are filled at a filling station and welded at a top seam welding station.
When packages having a parallelepiped shape are produced, flaps or lugs (from the weld) are formed at the bottom and top of the package, respectively. In order to avoid disturbing these flaps or lugs (hereinafter called simply "flaps" or "weld flaps") when the filled packages are carried in a larger packing container, e.g. a cardboard shipping box, said flaps must be held flush against the outside of the packages or else must be cut off. They may be cut off only if the weld at the given location on the package exterior is constructed such that the cutting does not give rise to an opening. This entails additional welding which is relatively costly. Simply pressing down the bottom and top weld flaps does not suffice to bring them into the proper position for the subsequent packing into the packing container.
An object of the invention is thus to devise a machine of the type described initially above whereby the bottom and top weld flaps (of the package) are durably positioned against the outside of the package, and wherein the additional work stations necessary to accomplish this (durable positioning) are disposed on the machine in a manner which maximally conserves space, and are as simple as possible from a fabrication standpoint.
This object is achieved according to the invention in that a bottom flap forming station is disposed on the expanding mandrel carousel, the top seam welding station has welding dies which extend over the entire length of the top seam, and there is a top forming carousel located downstream of the filling carousel in the flow of work, which top forming carousel has a top flap forming station and a top flap sealing station.
The bottom and top flaps are preformed in the respective forming stations such that in the subsequent sealing station they can be sealed against the outside of the package by simple means employing pressure and heat. The preforming enables the residual forces acting on the sealing location to be kept very small, thus avoiding the danger that the seal will subsequently come apart, and at the same time lowering the requirements for the strength of the seal such that little seal strength is required.
The increased number of work stations is provided for in a manner which is very simple from a fabrication standpoint and also space-saving, namely in that the stations for forming and sealing the top flaps are located on a separate top forming carousel. In comparison to the option of providing a larger carousel with more work stations, the inventive arrangement has the advantage of better space utilization. Moreover, the arrangement is particularly simple from a fabrication standpoint, because basically the same component parts can be used
The invention is described in more detail hereinafter, with the aid of an exemplary embodiment which is illustrated in the drawings.
FIG. 1 is a simplified plan view of a m
REFERENCES:
patent: 2229864 (1941-01-01), Moore
patent: 2548251 (1951-04-01), Bergstein
patent: 3026663 (1962-03-01), Giraudi
patent: 3559369 (1971-02-01), Buchner et al.
patent: 3918236 (1975-11-01), Allen
patent: 4080237 (1978-03-01), Deimel
Sipos John
Studebaker Donald R.
Tetra Pak International AB
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