US2935932A - Presses for processing paper and cardboard - Google Patents

Description

May 10, 1960 F. LAUFER PRESSES FOR PROCESSING PAPERIAND CARDBOARD Filed April 3, 1957 2 Sheets-Sheet l May 10, 1960 F. LAUFER PRESSES FOR PROCESSING PAPER AND CARDBOARD Filed April 5, 1957 2 Sheets-Sheet 2 United States Patent f PRESSES ro PROCESSING PAPER AND CARDBOARD Frdric Laufer, Prilly, near Lausanne, Switzerland, as-

signor to J. Bobst and Son S.A., Prilly, near Lausanne, Switzerland, a corporation of Switzerland Application April 3, 1957, Serial No. 650,510

Claims priority, application Switzerland April 10, 1956 7 Claims. (Cl. 100-299) The present invention relates to presses for processing paper and cardboard, and more particularly to presses from which the fiat operational tools, such as printing and stamping plates, can be Withdrawn laterally.

In small presses, it is easy, when the tools are taken out of the press laterally, to lay them down and turn them as desired. This is not, however, possible with large presses whose tools are more than a meter square and thus very heavy.

It has already been proposed to provide large presses with winches or other such lifting means." Moreover, for printing machines, it has already been proposed to use carrying trestles by means of which tools can be brought into an inclined position.

It is an object of the invention to provide for improving presses whereby the associated tools can be readily maneuvered.

Briefly, in achieving its objectives, the invention contemplates the provision of pivoted means or means enabling a pivoting of press tools which otherwise need be manipulated by hand. Thus, mechanical and other advantages are employed which greatly facilitate the usage and maintenance of press equipment.

The invention will next be described in greater detail with reference to the accompanying drawing in which:

Fig. 1 is a partial pictorial view of a press indicating how a tool or plate can be laterally withdrawn;

. Fig. 2 illustrates a plate of a press which can be pivoted in accordance with the invention; I

Fig. 3 illustrates an embodiment of the invention which enables a pivoting of the plate;

Fig. 4 illustrates further means provided in accordance with the invention for the pivoting of a plate;

Fig. 5 illustrates means provided on the tool itself to enable its pivoting;

Fig. 6 shows means for looking a plate in its pivoted position; and

Figs. 7-10 show variations of the structure of the invention.

The press illustrated in Fig. 1 consists of a main body 1 in which are positioned tools or plates such as, for example, an upper and a lower platen (not shown) between which sheets of paper or cardboard which are to be processed (for example, cut or shaped) are introduced in the direction of arrow 2.

The tools can both be extracted laterally through an aperture 3 in the press body and between guide members which are in the form of brackets 4 and 5 and which support the extracted tools. The extracted tools are then available to the press operator.

'the half-bushing of the bracket.

2,935,932 Patented May 10, 1960 In order to obviate this, the present invention provides means for enabling at least one of the tools to rotate or pivot and be reversed between its guide or bracket members after it has been extracted from the press.

Fixed to the body 8 of a press illustrated in Fig. 3, and adjacent a lateral aperture 9 through which the tools can be withdrawn, are tool guide members which are in the form of two brackets whereof one bracket 10 is illustrated.

Each bracket comprises three pins 11, 12 and 13 which are situated one below the other in the vicinity' of the aperture 9, and a fourth pin 14 in the vicinity of the free end of the bracket and below a half-bushing 15.

These pins serve for guiding and supporting the tools and partly as means for locking the upper frame or tool in two positions.

Thus, when a frame is withdrawn from the press, it is situated in the plane defined by the chain-dotted line 16" wherein it is supported by the half-bushing 15 on the one hand and by engaging between the pins 11 and 12 on the other hand.

Fig. 5 shows an edge of the associated tool or frame 16 provided with a substantially central stud 17 which acts as a pivot pin when the frarne has been withdrawn. It is. this stud, placed in the half-bushing 15, which supports the frame, enabling the latter to co-operate with The same arrangement is provided on the opposite side;

As for the parts designated hereinbefore as pins, they are in principle constructed as shown in Fig. 6, which shows part of the bracket 10 and the pin 11. The latter is composed of a piston 11, a rod 18 and a head 19, the rod extending through the bracket which is formed so that the piston piece can be retracted fully by withdrawing the pins.

When the pin 11 is withdrawn, it is possible to pivot the frame 16 in the direction of arrow 20.

After substantially a full turn, the frame arrives in the direction of arrow 21 to assume position 16, the pin 13 having temporarily been withdrawn in order to allow the frame to bear against the pin 12. Then the pin 13 is reinserted and the frame is locked in the reversed position.

The pins therefore serve to lock the frame in its two extreme positions.

The pin 14 which serves to support the other tool, that is to say the counterplate, must of course be withdrawn during the reversing of the frame into whose path of travel it penetrates.

In order to facilitate the introduction of the studs which constitute the pivot pins of the frame into the half-bushings, it is advantageous to construct the said bushings as illustrated in Fig. 4.

The bushing proper is constituted by the channel 22 which is adjacent an inclined surface 23 forming a ramp along which the pivot stud of the frame is guided in the direction of the arrow 24.

Fig. 7 shows a variation of the means for allowing the frame to be pivoted and reversed.

Formed in the guiding sides of the side piece 25 of the frame are holes 26 into which can be inserted rods 27 which are slidable for this purpose in the direction of the arrow 28 in the bracket which is not shown in this figure.

The frame is then rotatable about two such rods situated opposite one another.

Another variation can consist in gripping the side piece 29 of the frame (as illustrated in Fig. 8) by means of a fork 30 which pivots about rod 31. The holes 32 enable the assembly to be locked securely by inserting into the holes a pin which is intended to prevent the frame from sliding in the fork during the reversing operation.

The variation shown in Fig. 9, which also makes it possible to connect the frame securely without there being any sliding movement between the side piece 33 and a pivotable fork 34, achieves this result by notching the side piece at 35 in order that the fork can fit onto the notched portion.

The lastvariation, which is illustrated in Fig. in perspective View, comprises brackets 36 and 37 supported by he press body 38 and, between the said brackets, the aperture 39 through which the tools are Withdrawn laterally from the press.

Pivoted on the free ends of the said brackets are slideways 40 and 41 which are U-shaped in cross-section and are adapted to receive, guide and support the withdrawn toolwhich it is desired to reverse.

The position occupied by the tool in the slideways is illustrated by the chain-dotted line 42 and the arrows 43 indicate the possible directions of. pivoting.

Thus, when extracting the tool, it is sufficient to insure that the slideways have been brought into a horizontal position opposite said tool, and to introduce the tool into the said slideways. Then pivoting is readily possible.

The slideway 40 terminates in a heel portion 44 which is intended to arrest and support the tool. Such a slideway can be detachable and can either be fitted onto a pivot on the corresponding bracket or may itself be provided with a pivot which penetrates into a hole in the said bracket.

The slideway 41 shows how, by extending the heel as indicated at 45, it is possible by connecting this part to the other slideway to make the slideways an integral-hoop which surrounds the tool. In this case, this hoop can be permanently fitted to the press and can be lifted from between the brackets when it is not being used.

\What is claimed is:

1. A press wherein is employed a flat operational tool comprising a body defining an aperture by which the tool can be inserted and withdrawn, spaced brackets adjacent the aperture in coplanar relationship, and means on the brackets and tool for guiding the tool therealong and for pivoting the tool on the brackets whereby access is permitted to opposite sides of the tool, said means comprising guide pins on the brackets for guiding the tool out of the body and a pivot pin and bushing assembly on the brackets and tool and mutually engageable with the tool withdrawn from the body to enable a pivoting of the tool.

2. A press as claimed in claim 1 wherein the brackets are horizontal and wherein three guide pins are vertically positioned on each of the brackets to define intermediate passages for the tool, at least the uppermost and lowermost of the pins on each bracket being retractable to permit a pivoting and subsequent locking of the tool.

3. A press as claimed in claim 1 wherein each bushing comprises a body including a ramp adjacent which is defined a contiguous open channel.

4, A press as claimed in claim 1 wherein the pivot pin of 'each pin and bushing assembly is on said tool.

5. A press as claimed in claim 4 wherein the pivot pin is supported directly on the tool.

6. A press as claimed in claim 4 comprising a fork supporting each pivot pin on the tool.

7. A press as claimed in claim 6 wherein the tool defines a notch for accommodating the forks.

References-Cited in the file of this patent UNITED STATES PATENTS 2,096,643 Mills Oct. 19, 1937 2,224,682 Howland-Shearman Dec. 10, 1940 2,795,274 Beaulieu June 11, 1957 2,830,661 Thostel Apr. 15, 1958 2,843,204 Munschauer July 15, 1958

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