US2627290A - Press, especially a veneering press - Google Patents

Description

Feb. 3, 1953 v. BERTHELSEN PRESS, ESPECIALLY A VENEERIVNG PRESS Filed Feb. 5. 1948 all.

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ATT'YS Patented Feb. 3, 1953 PRESS, ESPECIALLY A VENEERING .PRESS Viggo Berthelsen, Hellerup, Denmark, assigner to V. Berthelsen Engineering Works Inc., a corporation of Illinois Application February 5, 1948, Serial No. 6,402 In Denmark October 23, 1945 1 Claim. 1

The present invention relates to improvements in presses especially veneering presses.

In most presses of this kind there has previously been used a heavy frame construction, the purpose of which has been to give the necessary rigidness, and in this frame construction the press tables have been mounted as units independent of the frame construction.

Presses of this kind have been rather heavy and have contained a superfluous mass of iron, which also decreased the efficiency of the press by letting away some of the heat.

It is the main purpose of the invention to procure a press of the kind referred to in which the weight of the press can be decreased by only using a minimum of iron in the frame construction It is a further purpose of the invention to procure a press of the kind referred to in which the necessary rigidness is obtained with a minimum of iron.

Further objects and purposes will appear from the following specification.

Reference will now be made to the drawings in which Figure 1 is a perspective view of a press according to the invention.

Figure 2 is a horizontal section taken on the line II-II of Fig. 3 through one of the tables, and

Figure 3 a vertical section along the line III-III in Figure 2.

In Figure 1 is shown a. press comprising a welded frame construction with vertical frame columns I, upper transversal frame parts or beams 5 and lower frame parts or beams B. In this frame construction is xed an upper table 2 and below this a movable table 3 which is operated from a number of hydraulic cylinders 4 so as to engage the undersurfaee or face of the upper table 2 when the press is operated. The control means for the hydraulic cylinders are not shown in the drawings because this arrangement can be made in any manner known to those skilled in the art. The hydraulic cylinders are rigidly connected with the frame construction and arranged on the lower transversal bars or beams E.

The upper table 2 and the lower table 3 are heated by means of steam which is supplied to the tables through inlets and outlets I0, see Figure 2, and according to the invention the upper table is constructed so as to form a part of the rigid construction of the press. This feature is fully disclosed in my copending application Serial No. 6,401, filed February 5, 1948.

The upper table and preferably also the lower table comprises a flat welded box, and means are provided to form a, zigzag or sinuous heating channel in the table. These means are a plurality of the interior parallelly disposed walls I3 which are welded to the top and the bottom walls of the table and each alternatively abuts the end walls I5 and I6 of the table. It is to be noted from Fig. 2 that the length of the Walls or partitions I3 are less than the length of the table wherein they are disposed.

When welding the table the welding preferably starts at the middle partition which is welded between the two plates forming the top and the bottom of the table, and thereafter the partitions are welded alternately at both sides from the middle finishing with the side walls II and I2.

The end walls I5 and I6 may consist of smaller sections welded in between the partition walls I3.

By this construction the table is very easily manufactured, and simultaneously a very rigid mechanical construction with great rigidness in the longitudinal direction of the walls I3, because by the Welding, the top and bottom plate of the table will get a spanning against the walls..

Due to the rigidness of the table in the longitudinal direction of the walls the table can be used as a part of the rigid construction of the press so that the whole frame construction can be limited to that shown in Figure 1 without any further upper structure other than the upper transversal bars 5 which normally are used in presses of this kind.

The only thing to be taken in view in the construction of the frame is that it must have the necessary rigidness in transversal direction While the other rigidness will be automatically obtained by means of the construction of the table.

While it is essential that the upper table is made in this manner it will be understood that the lower table preferably will be made in the same way because it is a very simple and cheap construction of the table.

I claim:

In a press of the class described, a plurality of frame constructions each comprising a pair of spaced vertical columns and an upper horizon-- tally disposed transverse beam, the ends of which are welded to the upper ends of respective said frame constructions forming' columns, aligned frame openings, a, hydraulic operated; press-table movably arranged within said framel openings, a stationary hollow press-table rigidly secured to said transverse beams as a stiffening direction of said transverse beams and connected 5 at their upper and lower edges with the top and bottom Wall respectively of said hollow "presstable.

VIGGO BERTHELSEN.

REFERENCES CITED The following references are of record in the le of this patent:

Number 4 UNITED STATES PATENTS Name Date Romunder Aug. 21, 1906 Dutcher May 25, 1909 Merritt Mar. 11, 1919 Cannon V Feb. 28, 1939 et al.) ;V.`. 5,

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