Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Chamber enclosing work during bonding and/or assembly
Patent
1997-02-26
1998-08-25
Engel, James
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Chamber enclosing work during bonding and/or assembly
1565833, 156540, 156230, 156285, B32B 3100
Patent
active
057980179
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to improvements regarding a device for sublimating a decoration on the surface of an object of whatsoever shape in order to increase the production and the quality of the objects to be decorated.
2. History of the Related Art
In the art are known machines of such type, generally consisting of two hinged rigid frames, in which one of the sides is integral with a membrane capable of elastic deformation. An inker, an object and a second inker are inserted into the machine between the two membranes. The machine is placed under vacuum so that the inkers, and in particular their decorated surfaces, be pressed against the surface of the object to be decorated. The assembly maintained under pressure is placed in a furnace, e.g., an electric one, for sublimating the decoration over a few millimeters of depth on the surface of the object.
This type of machines presents, however, some disadvantages with respect to the rigid frames which, when placing the machine under vacuum, preclude a perfect deformation of the elastic membranes and of the inkers, causing a clearance at the contact points on the object. When the decoration is transferred, this clearance between the object and the inkers results in a not decorated line at the level of the contact point, which is detrimental to the quality of the object.
SUMMARY OF THE INVENTION
The particular aim of the present invention is to remedy these disadvantages.
The device in accordance with the present invention comprises at least one elastic membrane retained by sealing means and capable of elastic deformation in all directions when the device is placed under vacuum.
The membranes are made out of a material such as silicone or polyester, so as to withstand temperatures reaching 250.degree. or more.
BRIEF DESCRIPTION OF THE DRAWINGS
By way of example, the accompanying drawings will allow a better understanding of the invention, of the characteristics it presents and of the advantages it is likely to bring. disadvantages when transferring the decoration to the surface of the object.
FIG. 3 is an exploded view showing the decorating device in accordance with the present invention.
FIGS. 4 to 7 are drawings representing the elastic deformation of the device when it is placed under vacuum.
FIGS. 8 to 10 are drawings showing a first variant of the device in accordance with the invention.
FIG. 11 is a diagrammatic view showing a variant of the fastening of the device shown in FIGS. 8 to 10.
FIGS. 12 to 14 are drawings showing a second variant of the device illustrated in FIG. 3.
DESCRIPTION OF THE PREFERRED EMBODIMENT
type, comprising an upper membrane la and a lower membrane 1b, each respect to each other.
Prior to closing the frames 1c and 1d, an inker 3, an object 2 and another inker 3' were inserted between the membranes 1a and 1b. Each inker 3, 3' is provided with a surface that is covered with an identical decoration 31, 31' that will come into contact with the surface of the object 2 to be decorated. The decorating device 1 is then placed under vacuum, deforming the membranes 1a and 1b and the inkers 3, 3' so that the decorations 31, 31' are pressed against the object 2. The device 1 is inserted into a hot environment to enable the transfer of the decoration 31, 31' of each inker 3, 3' to the surface of the object 2.
When the device 1 is placed under vacuum it can be noted that the deformation of the membranes 1a and 12 does not suffice for the inkers 3, 3' and, in particular, for the decorations 31, 31' to come into contact with the object 2, wherefore a blank space e is left at the level of the contact point. Moreover, the pressure increase in the device 1 brings about very rapidly the rupture of the membranes 1a and 1b at the points where they are affixed to the rigid frames 1c and 1d. Thus, after the sublimation of the decoration 31, 31', it can be observed that around the entire border of object 2 runs a not decorated continuous line of variable width 1. It goes without sayi
REFERENCES:
patent: 3793115 (1974-02-01), Jindra
patent: 3868901 (1975-03-01), Valiela
patent: 4078962 (1978-03-01), Krueger
patent: 4247355 (1981-01-01), Friedrick et al.
patent: 5322665 (1994-06-01), Bernardon et al.
patent: 5507896 (1996-04-01), Yoshimura et al.
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