DE2021936A1 - Letter punch - Google Patents

Description

DR.-ING. EUGEN MAIER PATENT ADVOCATE STUTTGART

A 11 o1o

April 197o
- me

Company Louis Leitz 7 STUTTGART - 3o, Siemensstrasse 64 ' *

Letter punch

The invention relates to a solid type of letter punch for materials that can only be punched with relatively great force, such as hard cardboard, stapled Stack of documents and the like

The effort required for holes of this type with one insertion width of 5 and more millimeters can through the formation of the cutting of the two punch or by an extension of the power arm of the

109847/0159

Δ 11 οίο

3ο. April 197ο

i - me

both punch punches acting Bruckhebela reduced are, however, in one case an additional processing the cutting of the punch and in the other case also an enlargement of the base plate of the Lochers makes necessary »

To reduce the force exerted on the pressure lever, it has therefore already been proposed to design the punch so that the two punch punches do not come into effect at the same time, which can be achieved, for example, by making the two punch punches unequal in length. However, the production of punch punches of unequal length makes the production of these punches more expensive, the difference in length of which is relatively small, so that special care must be taken so that the two punches of unequal length are not confused with each other during assembly "

The invention is therefore based on the object of designing the pressure elements of a perforator of the aforementioned type in such a way that the two perforators "have the same length at a short time interval from one another to act on the material to be perforated"

109847/0159 -'-

A 11 o1o

5o. April 197ο

This is achieved according to the invention in that the surfaces of the pressure elements arranged on the pressure lever which act on the end faces of the two punch punches are arranged offset from one another in height.

This can advantageously be achieved in that two separate stacks of holes are placed in the pressure lever acting Druokaehsen in the pressure lever against each other »Zn these« are arranged offset. All you need is the holes for the two printed matter Drilled on an arc of a circle and the pivot axis of the pressure lever offset by a small amount of angle to become.

If the pressure lever is designed so that it has only two bearing points for a continuous pressure axis, then the purpose of the invention is advantageously achieved by that the print axis is in the area of the two hole stevels has an unequal diameter "

In the drawing, an example of the last-mentioned hole punch design is shown in an echeaatl way. Show it

109847/0159

A 11 οίο

3o. April 197ο

1 - me

1 shows a view of the rear side of the punch partially in section;

71g »2 shows a vertical section through the hole punch the section line 2-2 of the 7ig »1 =

The lower rope 1 of the punch has two guides 2 for the two punch punches 3 and an insertion slot «4 for the punching good. In the holes on the two sides Cheeks of the lower part is mounted an axis 5, which the upper rope of the punch, the pressure lever 6 as Pivot axis is used. In this a Druokaohse 7 is stored, which has a larger diameter at one end 8 · In the middle rope of the axis 5 is on this one Cylinder 9 mounted, which carries two coil springs 1o, ▼ on the two free ends of the downward facing end 11 rests against a shoulder 12 of the lower rope of the punch, while the upwardly facing free end 13 rests against the axle 7 mounted in the pressure lever 6 the two ends of the pressure axis 7 are arranged drivers H, which engage in the ring grooves of the punch 3 and after punching the punch punch again above bees. The lower rope 1 of the punch is by means of

109847/0159

-n 5 -

A 11 οίο

3o, April 197ο

i * me

Screws, not shown, on one of the schnitzel container receiving plate 15 screwed.

109847/0159

Claims (2)

A 11 Οίο 3ο April 197ο ι liarfineftrgeTOeö become ■ η β ρ r ti ehe 1 · Letter punch «it is a« a «lower part of the body of the drill mounted pressure lever and swei in holes of the punch * body-guided equal-length hole teas, on whose upper end face an axis mounted in the pressure lever acts, thereby kennaeiohn β t, that the on the end faces of the two punches (3) acting surfaces of the pressure organs (7, 8) are arranged vertically against each other 2. letter punch according to claim 1 «thereby g β kennseiohn et, dafi in the "pressure lever (6)" are white separate, each acting on a Loohsteapel (3) Print axes equal passages staggered against each other are arranged. 3 · letter punch according to claim 1, characterized thereby et «dafi a continuous pressure eyelet (7) in the area of the two Iroohetewpel (3) one has unevenly sized Duroheeeeer (7t 8) 109847/0159