Metal deforming – With cutting – By composite tool
Patent
1993-10-28
1995-05-09
Crane, Daniel C.
Metal deforming
With cutting
By composite tool
72410, 2924358, 7131, B21D 3900
Patent
active
054129710
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/SE92/00276, filed Apr. 28, 1992.
FIELD OF THE INVENTION AND PRIOR ART
This invention relates to a tool for use in preparation of signs of the type having a base section and sign elements engaging therewith, said tool comprising two members movable with respect to each other.
The base section of signs of the type mentioned here has longitudinal rim or edge portions folded over, so that the cross section of the base section gets a C-like shape. The sign elements have the character of usually rectangular discs, which are displaceably received in the base sections by the fact that the edge portions of the base section folded over overlap the edge portions of the sign elements. Fastening of the sign elements in the base sections is accomplished by deforming the latter at the ends thereof, more exactly by pressing the edge portions folded over inwardly towards the bottom portion of the base sections. Thus, the base sections will in other words at the ends thereof project a distance past the sign elements arranged at the ends. Holes are arranged in the end portions of the base sections projecting past the sign elements, so that the signs may by for example screws, nails or rivets be fixed to an arbitrary frame.
In accordance with the prior art several tools have been used for the preparation of the signs. Among other things, an ordinary plate shears has been used for cutting the base sections, whereas a pair of tongs have been used for pressing the edge portions of the base sections folded over. The work for preparating the signs while using different tools is time consuming and hard, on one hand as a consequence of the need to use a plurality of tools, and on the other because the tools known have not been particularly well suited for the task. A none too negligible skill of the operator is required for obtaining an acceptable final result.
SUMMARY OF THE INVENTION
The object of the present invention is to develop a tool of the kind mentioned in the introduction, which should be adapted to permit preparation of signs of the type discussed in a rational way.
This object is obtained according to the invention by giving the tool the characteristics closer defined in the appended claims.
Thanks to the fact that according to claim 1 the tool members comprise on one hand edge means for cutting the base section off, and on the other means for deforming the base section so as to create obstacles for the sign elements to leave the engagement with the base section, prerequisites for achieving the cutting off as well as the deformation in one and the same sequence of movements of the tool members are created, thereby giving the operator the possibility to carry out the work substantially more rapidly than before and an improved control of the working result is obtained in the sense that the cutting off of the base section and the deformation thereof will take place in such a way that the cutting off and the deformation get completely appropriately mutually located as a consequence of that these work operations are carried out during one and the same working stroke of the tool members with respect to each other.
The tool members also comprise means for cutting out holes in the base section in accordance with claim 2. Accordingly, an accurate location of the hole cut out, the cutting out of the base section and the deforming thereof with respect to each other is obtained, since all these work operations are carried out during one single relative movement of the tool members.
Further significant characteristics and advantages of the invention resulting thereof appear from the other claims and the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
With reference to the appended drawings, below follows a specific description of an embodiment of the invention cited as an example.
In the drawings:
FIG. 1 is a perspective view of the tool according to the invention,
FIG. 2 is a further perspective view of the tool seen in another direction,
FIG. 3 is another perspective view
REFERENCES:
patent: 3774425 (1973-11-01), Veneziano
AB Hammarprodukter
Crane Daniel C.
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