Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Plural or complex apparatus
Reexamination Certificate
1999-08-07
2001-02-13
Crane, Daniel C. (Department: 3725)
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
Plural or complex apparatus
C072S311000, C072S383000
Reexamination Certificate
active
06185975
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to production of elongated articles with predetermined section profile.
In particular, the present invention refers to an apparatus for cold bending of metal sheets for making elongated articles with predetermined profile.
DESCRIPTION OF THE PRIOR ART
There is known a need to produce elongated articles with predetermined profile from sheets of metal.
Elongated articles of this kind are usually used e.g. for covering some particulars of furniture or the like.
FIG. 1
shows an example of an article of the above mentioned type, indicated with
1
.
This article
1
is substantially formed of a sheet of metal, of length L, whose longitudinal edges
2
are folded so as to form a “C” shape with the edges
3
turned inward.
The front surface
4
of the article
1
has longitudinal ribs
5
and transversal ribs
6
, obtained by deep drawing of the sheet of metal.
At present, the elongated articles of the type illustrated in
FIG. 1
are produced from a continuous section obtained from a sheet of metal.
This section is cut according to the length of the articles to be produced.
This requires big, in particular very long apparatuses for folding the sheet of metal until the predetermined profile is obtained.
The above mentioned apparatuses generally do not allow to produce special relieves, such as the above mentioned ribs or the like.
Therefore, these relieves must be done separately, by a special deep drawing operation.
Moreover, these apparatuses are not very flexible, and consequently, a change of production requires the substitution of many elements and causes long breaks in the machine operation which results in productivity reduction.
SUMMARY OF THE INVENTION
The object of the present invention is to provide an apparatus which allows to obtain elongated articles with predetermined section profile by only one operation in which a metal sheet is cold bent.
Another object of the present invention is to obtain these elongated articles by an apparatus of limited dimension.
Still further object of the invention is to provide a bending apparatus, whose characteristic is versatility, which allows to rapidly and easily change the elongated articles being produced.
The above mentioned objects are obtained, in accordance with the invention, by an apparatus for cold bending of metal sheets to obtain elongated articles with predetermined section profile, said apparatus including: support means for supporting opposite ends of one sheet to be formed;
a form which has a section shaped according to said predetermined profile and operated perpendicularly with respect to its longitudinal axis;
a stop that faces said form, so that said form, while lowering, clamps said sheet piece to be formed and resting on said support means, to said stop;
two plates oscillating on a vertical plane transversal to said form;
two spindles fitted to said plates and arranged parallel to said form and at either sides of said stop;
two bending members rotating about said spindles, said bending members being operated in time relation with a synchronous movement of said form and said stop, to fold the two ends of said sheet round said form.
REFERENCES:
patent: 1552416 (1925-09-01), Bingham
patent: 2286255 (1942-06-01), Brooks
patent: 2557346 (1951-06-01), Green
patent: 2765020 (1956-10-01), Scarlett
patent: 3595061 (1971-07-01), Bassbo
patent: 3927548 (1975-12-01), Lannin
patent: 4893463 (1990-01-01), Woolford
patent: 5572901 (1996-11-01), Wilhelm
patent: 1792770 (1993-02-01), None
Coleman Sudol Sapone P.C.
Crane Daniel C.
Metal Work S.r.l.
Sapone William J.
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