This application is a continuation of PCT International application no. PCT/DK2008/000301, filed Aug. 25, 2008, claiming priority in Danish patent application no. PA 2007 01430.
The invention relates to a device for pressing of items such as a metallic rail around the edge of a sheet.
The invention furthermore relates to a method for pressing of items such as a metallic rail around the edge of a sheet.
The invention also relates to the application of a device for pressing of items such as a metallic rail around the edge of a sheet.
It is known to press items such as folded sheet metal rails, which are to be pressed around e.g. posters in order to reinforce and strengthen the edge used for hanging of the posters.
The devices, which have hitherto been used for pressing, are primarily based on mechanical closing of metallic cheeks, which are arranged around an axis of rotation according to construction principles, which are also known from various plate bending machines.
It has been found, however, that there are some drawbacks of the hitherto known devices, including that it is difficult to transfer an even pressure on the item, which is to be pressed, and it has also been shown to be problematic to secure the item in a specific position during the pressing process.
It is therefore an object of the invention to improve the known device and the method.
The object of the invention is achieved by a device which is characterized in that the device includes a profile, on which a binding rail is mounted on the underside of the profile, where the profile and the binding rail can be moved up and down in relation to two stationary mechanical guides, which are mounted to each other. One stationary mechanical guide is placed in the profile such that the stationary mechanical guide has a lower exterior side, which faces a lower internal side of the profile and similarly an upper external side, which faces an upper internal side of the profile. Thereby two spaces are created between the external sides of the guide and the internal sides of the profile, an upper space and a lower space. In each of these spaces there is placed at least one flexible element, which can in turns be filled or emptied with a gas or a liquid. On the other stationary mechanical guide is mounted a fixed base, which runs parallel with and under the binding rail.
In this way it thus becomes possible to transfer an even pressure to the item, which is to be pressed.
It is also characteristic of the invention that the device is provided with one or more magnets mounted at or integrated in the base, for fastening of iron-containing items, which are to be pressed.
It is hereby achieved that the item can be fixed in a specific position during the pressing process.
Further preferred embodiments of the device are discussed below.
As mentioned the invention also relates to a method.
This method is characterized in that a device is used for the pressing, where a partially bended metal profile rail is put on the fixed base, while an upper space flexible element is extended and a lower space flexible element is emptied. A sheet is placed with its edge into the partially pressed metallic rail. Hereafter the upper space flexible element is emptied while the lower space flexible element is extended. Thereby the lower space flexible element presses against the stationary mechanical guide's lower side and the movable profile's lower internal side and creates a descending movement of the movable profile and the binding rail against the fixed base such that the metallic rail is pressed wholly together around the edge of the sheet. Hereafter the lower space flexible element is again emptied and the upper space flexible element is filled, whereby the profile with the pressing machine is again lifted up in relation to the stationary mechanical guides and now releases the pressed item.
Hereby, it thus becomes possible, simple, inexpensive and efficient to transfer an even pressure over the whole item surface, which is to be pressed.
Further preferred embodiments are discussed below.
The invention as mentioned also relates to the application, which is characterized in that the device is used for pressing together or pressing items such as rails including metallic and magnetic rails around an end surface of objects such as posters or pictures.
The invention will now be explained more fully with reference to the drawings, in which:
In
In
The profile 1 and binding rail 2 can be moved bi-directionally in one dimension controlled between two stationary guides 5 and 8, to which is also connected a base 4 and a base support 6 where both base 4 and base support 6 can typically be manufactured from rust-proof steel plates or rails while the guides 5 and 8 can be manufactured from rust-proof steel profiles.
Items which are to be pressed are placed in the space 3 between the base 4 and the binding rail 2 and are pressed when the binding rail 2 is moved in the direction towards the base 4.
In
In
In the example shown in
In this situation there is thus an open space 3 between the binding rail 2 and base 4.
In
In
Hereby the space 3 is removed, indicating that the pressing is complete.
In a preferred embodiment, the flexible elements 10 and 11 are hoses, which can operate under a relatively high pressure, e.g. through application of a gas including air or a liquid including water, which is added to the hoses under pressure.
Since the elements 10 and 11 are flexible, when activated they will enter an extended state and press with an even pressure over the whole surface of the item which is to be pressed.
If the item, which is to be pressed, is manufactured from a magnetic material such as iron, the item can be fixed by building magnets into the surfaces, which outline the space 3 between the binding rail 2 and base 4 including in the contact surfaces of these latter.
In
The rail or bar 13 is manufactured in order to enhance the edge 17 of objects 12 such as posters and/or pictures.
In
The device part of the invention can be manufactured with two or more flexible elements such as hoses, but in a preferred embodiment is used exactly two hoses 10, 11.
Number | Date | Country | Kind |
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PA 2007 01430 | Oct 2007 | DK | national |
Number | Date | Country | |
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Parent | PCT/DK2008/000301 | Aug 2008 | US |
Child | 12731914 | US |