US916730A - Copying-press with pressing-levers arranged symmetrically to one another. - Google Patents

Description

K. LENGK. COPYING PRESS WITH PRESSING LEVERS ARRANGED SYMMETRIGALLY TO ONE ANOTHER.

APPLIOATION FILED MAR.30, 1908.

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K. LENCK.

COPYING PRESS WITH PRESSING LEVERS ARRANGED S-YMMETRIGALLY T0 ONE ANOTHER.

APPLICATION FILED MAR.30,190B.

Patented Mar. 30, 1909.

3 SHEETS-SHEET 2.

Lvenfom K. LENGK.

COPYING PRESSWITH PRESSING LEVERS ARRANGBD SYMMETRICALLY T0 ONE ANOTHER.'

' APPLIOATION FILED MAB.so.19oa.

91 6,73. 'Patented Mar. 30, 1909.

3 SHEETS-SHEET 3.

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FICE.

KARL LENGK, OF BERLIN, GERMANY.

COPYING-PRESS WITH. PRESSING-LEVERS ARRANGED SYMMETRICALLY TO ONE ANOTHER.

To all 'whom it may concern.'

Beit known that I, KARL LENCK, a subject of the German Emperor, and resident o1" 154 Friedrichstrasse, Berlin, N. W. 7, Germany, have invented certain new and usel'ul Improvements in Copyingelresses with Pressing-Levers Arranged Symmetrically to One Another, of which the following is a specification.

In the copying pressesalready known and having eccentric levers the eccentric pressure acts either directly on certain points in the pressing plates, or the eccentric levers press down springs which in turn transmit their force oi' pressure to certain points in the pressing plates. Hereby however a good copy is only obtained in the places where the pressure is applied, while in consequence of insufficient pressure the remaining portions yoi` the copy are indistinct or are not visible at all. This disadvantage is obviated by the present invention, as when the eccentric levers are turned over the pressure is transmitted uniformly from the middle toward both sides, the springs being continuously pressed against the pressing plate. The eccentric levers can moreover be suitably adjusted for books oi' different thickness. This however is not eiTeoted as heretofore by screwing up the pressing lever bearings higher or lower by catches, but by placing the pressing levers in certain lugs adapted to the current thickness ofthe books.

In the accompanying drawing, in which I have illustrated my invention like numerals oi' reference refer to like parts throughout the different views.

In said drawings, Figure 1 shows an elevae tion of my improved eccentric press. shows a plan-view ol' Fig. 1. Figs. 3-9 show a modiiied form oi' construction ot' my improved eccentric press.

In Figs. land 2 of the drawing the lower pressing'plate is indicated as 1, the upper pressing plate as 2. Between the two is the space for the copying book, which is compressed by forcing the pressing plates one to ward the other. The tension rods 3 which are bent to a U shape embrace the pressing plates so that the lower plate lies 'lirmly therein, while the u per plate can be easily raised and lowered llietween the arms of the bent rods. `The relative positions of the plates and rods is maintained in the simplest manner by forcing grooves in the sides of the Specification of Letters Patent.

Application filed March 30, 1908.

Fig. 2 l

Patented March 30, 1909.

Serial N 0. 424,106.

pressing plates into which the arms of the rods engage. The free ends of the tension rods are bent to form eyes 4 which serve as bearings for the eccentric levers. On the upper pressing plate 2 are iixed pressure distributing springs 5 consisting of rods which are suitably bent at their ends to lorm elongated eyes or lugs. In order to move the pressing plates one against the other it is thus only necessary to lower the pressing springs 5 in relation to the tension levers 3, this being effected in a simple manner by the eccentric levers 7. Each of these levers is bent to a U shape while the part joining the two arms oi' the U is bent upward to enable it to be conveniently held by the hand. Each of the two free ends is bent three times at right angles so that two cranks which stand apart are produced. One crank engages the eye 6 and the other the eye 4. By turning the lever over inward on to the pressing plate 2 the eye 6 is lowered to double the extent of the distance between the two bearing pins oll the eccentric levers 7. By suitably bending these levers any desired pressure can be applied in the press. The bend is moreover so arranged that after touching the pressing plate the levers 7 remain stationary, that is in the position shown in the drawing in full lines, and so likewise after they have been ut back outward and downward. In the atter position the pressing springs 5 and the levers 7 are stationary in relation to one an-V otherso that they form a convenient support for the copying book. The lever 7 must therefore stand somewhat higher than is shown in the drawing (Fig. 1). This position is determined by the length of the eyes 6, within which the inner crank bearing of the eccentric lever slides to and fro. The pressing springs 5 are suitably iiXed in the middle on the upper pressing late 2, in order that the pressure may be distributed uniformly over the copying surfaces.

In the modiiied form of construction shown in Figs. 3 and 5 of the drawing band springs 8 are arranged instead of the springs 5, for the purpose of obtaining a more powerful aressure, articular-ly for thick copying books. The iiigs 9 in the band springs can be produced by simply bending the band springs. In order to enable the press to be used for a number of book thicknesses it is only necessary to seat the cranks of the levers 7 higher or lower. Such a variable seating can be obtained by bending the free ends of the tension rods s0 as to forni not one eye or lug but a number of eyes or lugs. By coinpressing the bent levers 7 the outer bearing pins are removed from the lugs 4. Hereupon the lever 7 may be raised somewhat higher up to the second lug 10 and is then released, so that the pins catch in these upper lugs. The pressing plate 2 with the springs 8 is thereby put out of the position indicated by dotted lines into that indicated by full lines (Fig. 3). if the difference in the thickness of the books is only slight, it is only necessary to turn the free wire ends of the tension levers 3 over the lugs in the manner shown in Figs. 5 and 6. lf the lug is to be higher a new lug is formed by turning the wire around completely to the desired height.

The details of the press may vary considerably in construction. For example (see Figs 7-9) the pressing plates 1 and 2 can be dispensed with by bending a pressing plate 11 laterally and forming it above with lugs 12 at the ends, so that the tension rods 3 are also unnecessary. The upper pressing plate may likewise be replaced by a plate 13 which at the same time renders the springs superiiuous, as it is furnished with lugs 14.

What l claim as new and desire to secure by a United States Letters Patent is :M

In a copying press the combination of two press plates, rods connected to the lower press plate and having eyelets in their free ends, curved springs resting with their center part on the center part of the upper press plate, and eccentric levers in the eyelets and adapted to depress the ends of the springs.

in testimony whereof l have hereunto signed my name this 2O day of March 1908, in the presence of two subscribing witnesses.

KARL LENOK. Witnesses:

NOLDEMAR HAUPT, HENRY HASPER.

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