DE868302C - Paper feeder for multiplying small formats - Google Patents

Description

In the case of duplicating and stenciling devices using the stencil and transfer printing process to this day, the stack of paper in all devices is between two with sponge rubber, Felt or the like covered clamping jaws clamped. A paper feeder that too is covered with rubber rollers or plates, increases in each case according to the adhesion process the ~ top sheet of the stack and feeds it to the machine. By the scope the print drum and the much smaller pressure roller is the path of the feeder after limited in front so that. the smallest way corresponds to the width of a normal postcard.

Due to this fact it is not possible to post cards and still To reproduce smaller forms with the idea of previous procedures flawlessly and precisely.

So far one has helped by putting the postcards through two slide rails individually by hand-applied a marking. This is very time consuming and gives nevertheless inaccurate prints. Another custom is to use postcards to reproduce a so-called postcard stamp, which is an additional purchase means and also gives inaccurate prints.

With the paper feeder according to the invention it is now possible with any duplicating machine (single or multiple drum system) postcards and smaller ones Forms can be reproduced semi-automatically with pinpoint accuracy and scrap-free.

For this purpose z. B. a postcard or other small format, in contrast to the previous adhesion entrainment, now from the rear Edge bumped off with a feeder according to the invention, while leading of the feeder is automatically straightened and fed to the pressure roller for printing.

In Figs. I to 4 an - embodiment of the invention is shown.

After that, you only need the form on the page delimiter b, regardless of whether the form is directly on the slide plate a is present or whether it is parallel or at an angle.

The slide plate a, which is placed parallel to the pressure roller, takes the form with it and automatically aligns it with the pressure roller.

The feeder is hooked into the slide rod (cross rod) S. and is accurate of the duplicator in its way of going back and forth controlled, the slide plate a is therefore always exactly the same distance from removed from the pressure roller. After each sheet is grasped at its rear edge and is prepared, therefore consistently exactly constant prints are achieved.

-The slide plate holder c is in its slot d in the direction of the arrow A adjustable depending on the size of the form. The support rod e can be moved in the direction of the arrow C, also depending on the size of the form.

Gate valve plate a swings freely around fulcrum f, side limiter b movable in arrow directions D. Slide plate ci and side limiter b fit So go to the table.

Claims (2)

PATENT CLAIMS: I. Paper feeder for duplicating machines, characterized in that the feeder (a) fdaB the papers from their rear edge detected, automatically straightened to the pressure roller and leads under the pressure roller. 2. Paper feeder according to claim I, td, a characterized by Idaß the feeder plate (a) and the side limit stop automatically adjust align with the plane of the paper table, lengthened and shortened in a slot and can be swiveled to the side (about directions B) for correcting skewed prints.