DE2100903A1 - Microfilm reading and re-enlarging device - Google Patents

Description

AGi ¹ A - GBYAERT AKTIEUGESEIiSGHAPI 7 January 1971 Leverkusen 10-bg-bm

PG 579 / MG 84-2

Microfilm reading and re-enlarging device

The invention relates to a microfilm reading and re-enlarging device with a substantially vertical screen, one arranged above the screen, im essential horizontal exposure level for a sheet-shaped copy carrier, one downstream of the exposure level Development tray and guide elements for guiding through of the copy carrier through the development tray.

This arrangement of the assemblies, in which the projection part is designed as a device base and the copier part as a device head is, has the advantage that all assemblies occupy an operator-friendly position with a minimum of space and especially the! "ilmbühne with its various Control elements within easy reach of the operator is. In the known devices of this type, however, there is the disadvantage that in the above arrangement inevitably the underlying photosensitive layer of the copy carrier in the subsequent developing tray at least comes into contact with the outer wall of the tub in places, thereby damaging the layer or its development process can be affected. In the case of application

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PS 579 / MG 842

an electiostatic copying process can also lead to partial destruction of the latent image due to uneven removal of the electrostatic charges and to a blurring of not sufficiently tight Dye particles come ο

According to the invention, the copy carriers are now in a loop-shaped manner Conductive guide members are provided path through the development tray, with the path of the upward out of the developing tray, the path of the copy carrier from the horizontal down into the developing tray guided copy carrier crosses and the piece of track connecting the crossing point at least that in the transport direction has measured length of the sheet-shaped copy carrier " According to a preferred embodiment of the invention, the exposure plane is a supply roll, a Cutting device and a loading device for ZnO paper are connected upstream.

With this arrangement, the copy carrier is conveniently passed through the developing bath with the layer side up. Because that which connects the crossing point Track piece has at least the length of the sheet-shaped copy carrier measured in the transport direction, can despite of the intersecting guideway the terminating end of the

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PG 579 / MG 842

sheet-shaped copy carrier not through its incoming End up being disturbed »The entire development facility has a very compact, space-saving design, with the im substantial circular perm of the guideway through corresponding Curvature of the copy carrier transversely to the transport direction to stabilize the copy carrier during its passage contributes or prevents its leakage from the guideway. It also affects the tertiary exit of the copy carrier ™ from the developing tub favorably on the reflux of the developer liquid ven the nip rollers.

According to a further advantageous feature of the invention, a development electrode is arranged in the development trough in a manner known per se. This development electrode is expediently inserted as a semicircular trough in the development trough and a nozzle is provided for introducing developing liquid into the annular space formed by the copy support resting on the back of the developing trough and the surface of the developing electrode on the development electrode with certainty prevented,

It also has a beneficial effect on the development process and the undisturbed run of the copy carrier through the development station when the annulus is in the outlet

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direction of the copy carrier expanded in a funnel shape.

Finally, the one which leaves the development trough in an essentially vertical direction advantageously also forms Guide track a Trcckenstreoke for the copy carrier and this trooken route closes one to one side of the device inclined storage surface for the copy carrier. This latter feature takes up the smallest space and without deflecting the copy carrier, an easy-to-grip paper version is achieved on a side wall of the device.

In the drawing is an embodiment of the invention shown for example, it shows

Pig. 1 shows a section through the microfilm reading and zooming device according to the invention, and

Pig. 2 shows a section through the developing device.

According to Pig. 1 is in the housing 1 of a microfilm reading and back enlargement device one for viewing portrait and landscape formats in a known manner by at least 90 ° swiveling picture stage 2 arranged. The image stage 2 carries a supply cassette 3 and a winding cassette

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PG 579 / MG 842

for the microfilm strip to be viewed. The respective The microfilm image is created by means of a project lens 6 Via a semi-transparent deflecting mirror 7 on a viewing screen 8 thrown. The microfilm image is illuminated by means of a projection lamp 9, the a reflector 10 and a condensation arrangement 11 are assigned is, via a deflection mirror 12.

The microfilm image is projected by the semitransparent deflecting mirror 7 not only onto the screen 8 but also into an exposure plane 13 through which a ZnO-coated substrate 18 is guided by means of guide rollers 14 to 16. The Kjpieträger 18 passes from a supply roll 19, and is in one of the respective F rmabiänge means bir.er cutter 20 corresponding length cut off "Vr to entry into the Bellohtungsebene 13 he By J-hläuft a Djppelkjrctron 21, 22, which its surface with the for provides the required charge for the electrostatic copying process.

During the exposure process, which e.g. The manner shown can be controlled in that the during the entry of the Kcpieträgers 18 into the exposure level 13 switched off projection lamp 9 is switched on for a short time, the copy is sluggish.

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After Beli ";.. He hturgsy..rgang durjhLäuft the apparent in particular from Figure 2 En + wiiklungseinri ohtung It is here by means of baffle. ^1" 23, 23a <i e.lnem Transpcrtwalzenpaar 24, 25 vmi vn i-?.. -y $ by means of further, curved guide surfaces 26, 27 to eir.em E.:..nführwalzenpaar 28, 29 passed. This essentially quarter-circular infeed path 26, 27 closes an essentially semicircular development tub 30 impede.

In the tub 30 are also evc.e essentially semicircular development electr. ', Ie 31 inserted. The electrode 31 is arranged eccentrically to the tub 30, where a funnel-shaped widening annular space for the passage of the copy carrier 18 is created. At the inlet end of this annular space there is a spray nozzle 32 which sprays the developer liquid 33, which is pumped around by means of a reversing direction not shown in more detail, onto an inclined surface 31a of the development electrode 31. The developing liquid flowing into this annular space reliably prevents the sensitive layer side of the copy

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PG 379 / MG 842

carrier 18 to the development electrode 31. The suction the pumped-around development fluid takes place through a on the side wall of the Entioklungswanne 30 to attached suction opening 34. The Irijhterfcrm of the annulus has the distribution, that the first addition τ: η Tcner to the copy carrier 18 takes place in the immediate vicinity of the development electrode 31, wrdur-jh the so-called edge effect largely

is switched, while for development a larger one Development volume is available. The extension of the annular space also prevents the copy carrier 18 from jamming.

At the outlet of the development heat 30, the copy carrier 18 is guided in an essentially vertical direction to a pair of squeeze rollers 35, 36. The vertical position of the print carrier 18 favors the backflow of the squeezed-off developer fluid into the tub 30. The pair of squeeze rollers 35 _s 36 is followed by a guide track formed by guide surfaces 37, 38 for the copy carrier 18, which the vcn the guide surfaces 23, ² 3a, 26, 27 formed guideway, crosses. The length of the path through the curved entry path 26, 27, the developing tray 30 and the guide path 37, 38 is coordinated with the length of the sheet-shaped copy carrier that its end already passes the Kieuzungsstelle 39 when its beginning reaches this intersection again.

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BATH

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Yon the intersection 39 of the copy carrier 18 is at one Hot air blower 40, which causes the further drying of the Kcpieträgers 18 ". As soon as he has this short drying distance has passed through, it is deflected to a storage area 42 by means of a further guide plate 41. The shelf 42 is inclined to one side of the device, so that the Kcpieträger from dcrt under the action of gravity to a not shown in detail, arranged on the side of the device shelf can slide. This side shelf isb for the operator from the operating side of the Device is easily accessible.

According to Pig. 2, the development tray 30 is still from one Surrounding safety trough 43, which catches about sloshing developing liquid and via a drainage connection 43a is fed to the ümpumpkie skating.

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Claims (7)

Expectations Microfilm reading and re-enlargement device with an essentially tertiary screen, an essentially horizontal cover plane arranged above the screen for a sheet-shaped copy carrier, a development trough following the information plane, and guide elements for guiding the copy carrier through the drainage trough , dai3 the copy substrate (18) in a looped en web developing bath durih (30) conducting guide elements (23, 23a, 26, 27, 30a, 30b, 37, 38) are provided, wherein the path of the upward out of the unwinding ' .Sklungswanne guided copy carrier crosses the path of the copy carrier, which is also guided horizontally downwards to the development tank, and the web piece connecting the crossing point has at least the length of the sheet-shaped copy carrier measured in the transport direction. - 10 - 209830/0888 2IÜU903 - ίο - PG 579 / MG 842 2. microfilm reading and back enlargement device according to claim. 1, thereby gekenr ^ eijhnet that the exposure level (13) a supply roll (19), a child safety device (20) and a loading device {2 "., 22) for ZnO paper provided are. 3. Microfilmreading un3 re-enlarging device according to claim 2, dadursh indicated that in the developing roller (30) a development electrode (31) is arranged in a manner known per se. 4. microfilmreading Lind re-enlargement device in particular according to claim 3 »daiursh characterized in that the developing electrode {y \) is inserted as a semicircular trough in the developing trough (30), and that a nozzle (32) for introducing τ.η developing liquid into the ύζά dem with its rear side of the copy carrier (18) resting against the developing trough and the surface of the developing electrode is provided. 5. microfilm reading and re-enlarging device according to claim 4, characterized in that the annular space in the outlet direction the copy carrier (18) expanded in a funnel shape, 11 - 209830/0888 BADORLGiNAL PG 579 / MG 842 6. Microfilm reading and re-enlarging device according to one of the preceding claims, characterized in that the development tub ("50} in a substantially vertical In the direction of the guideway leaving a drying section for the copy carrier (18) forms " 7. microfilm reading and re-enlarging device according to one of the preceding claims, characterized in that the drying section is followed by a storage surface (42) for the copy medium that is inclined to one side of the device. 1 sheet of drawings 209830/0888 Blank page