Apparatus for final folding

Details Apparatus for final folding Apparatus for final folding

1993-11-18

1995-07-11

Bray, W. Donald

Package making

Closing packages and filled receptacles

Package or receptacle having closure flap, e.g., carton...

533703, 533724, B65B 726

Patent

active

054309883

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The present invention relates to an apparatus for the final folding, or inward folding, of at least the end portion, in particular corners, of a covering on a panel, in which the covering surrounds the panel and projects out over at least one edge to such an extent that at least first inward folds from two opposing edges overlap one another, while second inward folds from the opposite edges are located inside the overlapping first inward folds.
At present, there is no suitable machine, apparatus or plant for the substantially automated covering of panels of, for example Gullfiber.RTM. or the like for use of the finished product as acoustic absorbent in different environments. The covering is normally made of fibre-glass fabric or some other suitable material. Hitherto, substantially the only solution has been manual covering of Gullfiber.RTM. panels with fibre-glass fabric. It has proved to be particularly difficult to obtain, under such circumstances, smooth and straight corners and as uniform products as possible. In many environments, extreme demands are placed on the appearance of the product. It is naturally also desirable in the art to be able to devise a machine which requires few manual operations and which may be considered as almost fully automatic.


SUMMARY OF THE INVENTION

The object of the present invention is to satisfy the above-outlined desiderata and needs.
Employing an apparatus according to the present invention, it has proved possible to be able, almost wholly without manual operations, to cover or clad Gullfiber.RTM. panels with fibre-glass fabric for realizing acoustic absorbents of extremely high standards in respect of appearance. This implies that the absorbents display substantially smooth and even surfaces and smooth and even edges as well as straight corners. It has, moreover, proved to be difficult to reveal any discrepancies between the different absorbents, their quality proving, instead, to be highly uniform. Nor does there appear to be anything which prevents the apparatus according to the present invention from being applied in other contexts in which it is desirable to achieve even and straight corners on a covering of a relatively soft panel-shaped object.


BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be described in greater detail hereinbelow, with particular reference to the accompanying Drawings. FIG. 1 shows a diagram of a plant for utilizing the present invention. FIG. 2 is a side elevation of a fabric application table. FIG. 3 shows a side elevation similar to that of FIG. 1 of another embodiment of the application table. FIG. 4 is a schematic partial view of an apparatus for the inward folding of the covering on one longitudinal edge of a panel. FIG. 5 is a schematic view of a corner support in the starting position. FIG. 6 is a view similar to that of FIG. 5 of the corner support on its way down in a corner. FIG. 7 is a view similar to that of FIG. 5 with the corner support in position in a corner. FIG. 8 is a view similar to that of FIG. 5 with the corner support on its way up out of the corner. FIG. 9 shows a view of a portion of an apparatus according to the present invention which is disposed at a corner. FIG. 10 shows a view, partly in perspective, of the corner portion according to the present invention, as illustrated in FIG. 9, but with the parts in starting position. FIG. 11 shows a view similar to that of FIG. 10 with the parts in the cutting phase. FIG. 12 Shows a view similar to that of FIG. 10 with the corner support in the fold-supporting position. FIG. 13 is a view similar to that of FIG. 12, the needle support being in the needle-supporting position. FIG. 14 is a view similar to that of FIG. 10, the stirrup having been switched to the corner flap infold position. FIG. 15 is a view similar to that of FIG. 14, a glue strand having been applied to the corner flap and the one edge flap or edge infold. FIG. 16 is a view similar to that of FIG. 15, the upper edge flap or edge infold having been folded in.

REFERENCES:
patent: 3110144 (1963-11-01), Johansen et al.
patent: 3771280 (1973-11-01), Bechk
patent: 5311723 (1994-05-01), Boniani et al.

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