DE2008429C - Device for copying printing plates - Google Patents

Description

The invention relates to a device for copying of printing plates with a double copying frame on both sides has a device for loading Kopiergut and a Längsach ^e; is pivotably mounted in the upper section of a closed substructure.

Since the double copy frame when pivoting through its vertical position downwards at least half a frame width of clearance is required in a known device of this type (British patent specification 1032 845) the light source is arranged correspondingly deep in the closed substructure,

There are also fluorescent tube fields, if necessary with upstream directional grids for flat copiers known (French patent 1 320 624, German utility model 1979 471). An advantage this known fluorescent tube fields is that the light output by the fluorescent tube field possible small distance between the exposure unit and the copying surface is very high.

The invention is now based on the object of the previously mentioned advantage of the fluorescent tube field take advantage of the mentioned swiveling double copying frame which reduces copying time to be able to.

According to the invention, this object is thereby achieved. that in the interior construction a field of fluorescent tubes known per se is vertically movable in a horizontal plane, is optionally arranged with an upstream directional grid.

An advantageous development of the invention is that the fluorescent tube field by means of rollers, the roll on vertically - !. arranged rails, and is movable downwards and receives its drive in front of an electric motor via chains and sprockets.

In this case, actuatable contacts can be provided when the double copying frame is pivoted which, due to its arrangement, the electric motor can be switched on and off in this way. that when panning the Doppelkopierrahmens in its vertical position, the fluorescent tube field outside its deepest position of the frame pivoting area and comes back into copy position when the double copies imitate in . .ne is swiveled in a horizontal position.

Fine may be provided with the switch for switching on the arc tube array actuatable contacts on the drive motor of the luminous old stirring field is controllable. that when the exposure is switched on, the fluorescent tube field is moved to the copy position and after the Βεϋ-Ί »« "^ time is moved back to the lower position.

With Je arrangements it is avoided that accidentally when swiveling the frame Fluorescent tube field is destroyed ..

An embodiment of the invention is shown in the drawings and will be described in more detail below described. It shows

Fig. 1 shows a copier according to the invention seen from the side,

F i g. 2 a copying device according to the invention seen from the front,

F i g. 3 on a larger scale ¹ corner B of FIG. 2,

F i g. 4 on a larger scale corner A of the

Fig.

As shown in FIGS. 1 and 2, the double copying frame 2 is pivotably arranged in the housing 1 Below the double copying frame 2 is a fluorescent tube field 3, which on both sides by means of Rolls 5 can move up and down on rails 4. The device for moving up and down the The fluorescent tube field 3 is driven by means of the electric motor 16 and the downstream gear 17, which in turn drives a shaft IS which is rotatably coupled to one another via chains 11 standing wheels 6, 7, 8, 9, 10 acts, such that the fluorescent tube field 3 are pulled down can be in a position that makes it possible to tilt the double copy frame 2.

Fig. 3 shows in a partial view on an enlarged scale details of the Doppelkopierrahmcns. On the shaft 26 with the mandrel 29 is arranged on the section 27 of the fixed part 28 of the housing 1. On the shaft 26, the double copying frame 2 is mounted in bearings 31, via brackets 30, on which the plastic sheets 21 are attached. On these documents the copy is placed. Above that comes a glass plate 40 which is well sealed by means of the seal 22. On the glass plate 40 is placed on the end ceiling] 20.

<f

As FIG. 3 shows, all the parts described last are duplicated, namely above and below. Pressure plates 23, which are under the action of the coil springs 24, press the plastic plates 21 firmly to the paper and the glass plate. The springs 24 are supported on the common web 25 away.

37 is a

36 attached.

1 sheet of drawings

Claims (4)

Patent claims: 1. Device for copying printing plates with a double copying frame, which is on both sides has a device for inserting copy goods and which is pivotable about a longitudinal axis in the upper section of a closed one Substructure is mounted, characterized in that in the substructure (1) in a horizontal plane vertically movable a per se known fluorescent tube field (3), optionally with an upstream directional grille (36), arranged is, 2. Apparatus according to claim 1, characterized in that the fluorescent tube field (3) by means of Rollers (5), which roll on vertically arranged rails (4), can be moved up and down is and is. η Drive from an electric motor (16) via chains (1!) and chain wheels (6 to 10 receives. 3. Device according to claim 1, characterized in that that when pivoting the double copying frame (2) actuatable contacts are provided through which, according to their arrangement, the Electric motor (16) can be switched on and off in such a way that when the double copying frame is pivoted (2) in its vertical position the fluorescent tube field (3) its lowest position outside of the Frame shoe area occupies and aries in Copy position comes when the double copy frame (3) is swiveled into a horizontal position is. 4. Apparatus according to claim 2, characterized in that with the switch for switching on of the fluorescent tube field (3) actuatable contacts are provided, via which the drive motor (16) of the fluorescent tube field (3, 3) can be controlled in such a way that when the exposure is switched on the fluorescent tube field (3) moved to the copy position and after the exposure time in the lower layer is moved back.