DK142748B - ROTATE DUPLICATOR FOR LINE SECTION OR SIDE PRINTING OF A PRINT FORM - Google Patents

Description

(® (11) PUBLICATION NOTICE 1 42748 DENMARK (51), nt C | 3 B 65 H 1/00 // B 65 h 5/06 § (21) Application No. 2140/75 (22) Filed on 18 · & per. 1973 (24) void 1 Apr 8, 1975 (44) The application submitted and petition published on Jan. 12, 19 9

DIRECTORATE OF

THE PATENT AND TRADEMARK BASIS <3 °) P "0" 1 * den

Apr 20 1972, 2219959 * DE

(71) GERHARD RITZERFELD, Schorlemer Allee 14, 1000 Berlin 35 * DE.

72) Inventor: Same.

(74) Plenipotentiary in the proceedings:

Patent agent company Magnus Jensen's Eftf .______ (64) Rotary duplicator for linear, sectional or lateral printing of a printing form.

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a rotary duplicator for linear, sectional or lateral printing of a printing form and more particularly of the kind set forth in the preamble of claim 1.

There are rotation duplicates for lateral printing or duplication of entire format pages. Furthermore, rotary duplicators for linear duplication are known with a loading device for the sheets or notes to be printed on text lines or sections. The loading device is adjacent to a magazine table and here replaces a full size loading device. Therefore, rotary duplicators of the latter kind are useless for full-size sheets, at least a cumbersome rebuild or conversion is required if switching from sectional or linear duplication to duplicate whole sheets.

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There is also known a loading device having two superposed loading tables, both of which serve to guide sheets to a printing or multiplying machine. The removal of sheets is done for both tables by means of a common suction mechanism.

For this, it is necessary for one of the two tables to be displaced so that its contents of sheets reach into the operating area of the suction means. This table thus serves as an auxiliary table, from which the sheet feeding is only exceptionally made. In order to obtain an uninterrupted sheet feed when displacing the table, a constructively very cumbersome displacement mechanism is necessary. Furthermore, manual intervention is required at each displacement of the table, so the feed rate must be relatively small to obtain a controlled feed.

In contrast, the present invention is based on a loading device with two functionally equivalent loaders, which can be controlled alternately in any order, without the need for a special intervention in the loading mechanism. This allows for a significantly higher feed rate.

In the particular arrangement of the two loaders relative to each other, difficulties may arise in filling the loading device with sheets or cards. When, as here, a loading device is placed under the loading table, problems arise when the device needs to be refilled.

The object of the present invention is to provide a duplicator of the kind in question in which the loading table does not prevent refilling of the underlying loading device.

This is achieved according to the invention by the construction of claim 1.

The invention will now be explained in more detail in connection with the drawing, which shows a loading device according to the invention in schematic side view.

In the drawing, a magazine basket is indicated by 1 in which the cards or sheets 2 to be printed are placed. The magazine basket 1 has a slidable rear wall 3, which is arranged in guides 24, which is actuated by a pull in the direction of the arrow A from the rear towards the sheet stack 2-2a by means of ballast weights 25 acting through cord 26. 27th

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A pressure sensitive contact 4 located at the front of the magazine basket 1 detects whether or not sheet 2 is present in the basket. When activating the switch, ie. when sheet 2 is placed in the basket, a drive motor and an electromagnet not shown are connected. The motor drives the loading device through a friction wheel drive with friction wheels 5 and 6. The driven friction wheel 6 drives a shaft 12 through a timing belt drive with a toothed belt 9 and toothed pulleys 8 and 10. On the shaft 12, the direction of rotation indicated by an arrow D is inserted. an electromagnetic coupling 11, one part of which is pivotally connected to the toothed pulley 10. The other part of the coupling, which is normally carried by the first part by magnetic action when the coupling is powered, is in pivotal connection with a toothed disc which is mounted on the shaft, which through a toothed belt 13 drives a toothed disc 14 on another shaft 16. This second shaft 16 carries a rubber-coated feed roller 17, the direction of rotation of which is indicated by an arrow B. Adjacent to the feed roller 17, a retaining roller 18 which is slightly resiliently mounted over the feed roller 17 in action against this. On an axis 19 parallel to the shaft 16 is inserted an electromagnetic coupling 33, one coupling part of which is pivotally connected to a toothed pulley 20 driven through a toothed belt 15 of the shaft 16. The other part of the coupling 33 is pivotally connected to a friction roller 21 for driving the the sheets 2 to the curve 1. The direction of rotation of the roller 21 is indicated by an arrow C.

Above the magazine basket 1 is placed a counter support plate 22 which forms a narrow slot 23 against a lower baffle 28 for the sheet 2 which is being fed in. The slot 23 allows just one and only one sheet to pass, ie. the front sheet of stack 2-2a. This sheet is slanted upwardly forward under the action of the friction roller 21 which affects the sheet through a recess in the front of the basket.

Adjacent to the baffle 28 is an upper baffle 27. Between these two baffles, sheet 2 is guided during feed up to the two cooperating rollers 17 and 18, between which the sheet passes. After the two rollers 17 and 18, a baffle 29 is provided which guides the sheet forward to a set of cooperating transport rolls 30 and 31. From these rolls, the sheet is inserted in the usual manner between the printing means of the duplicator.

In connection with the transport rollers 30 and 31, a sensor contact 32 is provided, which is closed by the action of a passing sheet 2, thereby triggering a pressure cycle of the duplicator. A second sensor contact 34 is disposed adjacent the feed rollers 17 and 18. Upon actuation of this contact 34, which also occurs by actuation from a passing sheet, the current to the electromagnetic coupling 33 through which the friction roller 21 is driven is interrupted. This avoids the introduction of new sheets from the basket 1 while a sheet passes the rollers 17 and 18, ie. that two consecutive sheets overlap.

The successive sheets 2 are pressed in line or section in the duplicator printing device in the usual manner, which is not to be described further herein. From the printing device, the printed sheets are delivered in the collection tray 38 which is placed under the loading device.

The magazine basket 1 is pivotally disposed about a horizontal shaft 39 near the front wall of the basket. When charging the basket, this is displaced backwards in the direction of arrow E, the shaft 39 being slidably mounted in guides 40. In the rearward position, the curve can be swung downwards rearwardly of the shaft 39 to the position indicated by the dashed line in the drawing, after which the new sheets can easily be placed. place in the correct position in the basket.

For full-page printing of full-size sheets, the duplicator is provided with a nearly horizontal loading table 35 with a separate loading device 37 of a conventional type. The sheets of paper 36 are placed flat on the table 35 and fed to the conveyor rollers 30 and 31 by the feeder 37. The duplicator is provided with a switch which switches between the two feeder devices 37 and 17. The switch between the two feeder devices and the printing number may be pre-programmed. so that the duplicator automatically e.g. takes 4 full page strokes and after switching 15 line strokes with the sheets 2.