US 4,080,243 AGranted

Press for producing shaped articles

OwnerAndreas Peter Istvan Pohlinventor

Life of this patent

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Abstract

The present invention provides a press to apply pressure to a three dimensional shaped article. The three dimensional shaped object generally has a greater length and width than the dimension to be pressed, and is, for example, a laminate. The press comprises (a) a first horizontal pressing plate and a second horizontal pressing plate facing each other with a nip therebetween; (b) a flexible hollow member disposed against said first horizontal pressing plate on the side opposite said nip, said flexible hollow member being a part of a closed system containing a pressure medium and means for regulating the pressure of said pressure medium; and (c) an inflexible support behind said flexible hollow member, whereby upon a change of the pressure of said pressure medium, said first horizontal pressing plate is caused to move relative to said second pressing plate.

Claims23

Dependent claims

A press to apply pressure to a three dimensional shaped article which comprises:

(a) a first horizontal pressing place and a second horizontal pressing plate facing each other with a nip therebetween;
(b) a flexible hollow member disposed against said first horizontal pressing plate on the side opposite said nip, said flexible hollow member being a part of a closed system containing a pressure medium and means for regulating the pressure of said pressure medium;
and
(c) an inflexible support behind said flexible hollow member, whereby upon a change of the pressure of said pressure medium, said first horizontal pressing plate is caused to move relative to said second pressing plate;
and
(d) an edge strip along the periphery of the flexible hollow member which extends beyond the edges of the pressing plates and forms a hollow frame which is higher than the remainder of the flexible hollow member in contact with the pressing plates and wherein the interior of the hollow frame is connected to the remainder of the flexible hollow member.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/733,193Filed 18 Oct 1976
Priority: DT 254694420 Oct 1975
Granted: 21 Mar 1978
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B29C 43/10
Of articles of definite length, i.e. discrete articles: isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
B27D 3/02
Veneer presses; Press plates; Plywood presses: with a plurality of press plates, i.e. multi- platen hot presses
B30B 1/003
Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust…
B29C 2043/3238
Particular pressure exerting means for making definite articles: pressurized liquid acting directly or indirectly on the material to be formed