DE2527560A1 - Continuous working film strip developer appts. - has squeegee type excess fluid wipers at processing bath exits - Google Patents

Abstract

A film strip developing appts. is designed for continuous working withone strip following the other. The strips can be of various sizes. Each processing bath, through which the film panes during developing, has a fluid wiper device or squeegee situated at its exit. The film strip is fed through the system over rollers and passes through the squeegee devices to remove excess fluid before entering the next processing bath. The squeegee devices are constructed such that alteration in the passage plane of the film does not affect the pressure exerted upon the wiper sections (11).

Description

AGFA-GEVAERT AKTIENGESELLSCHAFT June 20, 1975

10-pa-gl

Leverkusen

PG 820 / MG 1103

Continuous developing machine

The invention relates to a continuous developing machine for film strips of different widths, with bath containers arranged one after the other for developing, fixing or bleaching and soaking, through which the film strips can be guided over rollers, and with arranged at the respective bath exit Liquid wipers.

In the case of continuous development machines, the Films passed through successively arranged baths in which different chemicals are contained. Each this bath is for a specific process determined in the entire development process and the development item is for a certain period of time this course of the process exposed. The time for the individual process is essentially determined by the residence time of the material to be developed determined in the individual container, or with

609882/0932

252756Ü

FG 820 / KG 1103:

in other words, the throughput speed with which Film strips are fed through the container. This one Transport speeds are constant, care must be taken to achieve a constant process time, that the bath concentration is also kept constant. Care must therefore be taken that the used treatment liquid is always renewed, but also that the treatment liquid is not is consumed faster than necessary. However, a treatment liquid is usually consumed very quickly by bringing liquid from the previous container with the film strip into the next container will.

It has therefore already been proposed to run the film strip through a stripper at the exit of a container which separates and retains the liquid in this container from the film strip as well as possible. Stripping the treatment liquid from a film strip is also important because then the treatment liquid of the next following container can act on this immediately upon entry of the film

- 3 - ■

609882/0932

PG 820 / MG 1103

Tand do not remove old treatment liquid first

For this purpose it is "known" in front of the pulley on the exit side a container to arrange a bracket device-fixed, on which two rubber lips are attached, which are in Bend the direction of movement of the film towards this and rest against the egg with their tapering ends. The disadvantage this known arrangement can be seen, on the one hand, in the fact that when the film running plane is displaced, one Gunimilippe is pressed harder against the film while the others only lightly and no longer serves its purpose. The film is only stripped off on one side. On the other hand, the tangential contact of the rubber lips does not bring about a sufficient wiping effect.

For the relocation of the film run level there is essentially two reasons. On the one hand, the film flutters from roll to roll anyway * This flutter can be increased if when passing at any point

!
an obstacle to running occurs and | then a jerky one

Film transport takes place. On the other hand, there is a shift

609882/09 3?

PG 820 / MG 1103

the film run level to a much greater extent when different film widths are to be processed. As the films run on concave rollers, at approaches a narrow film the film running plane of the roll axis, whereas in a wider film it is further away.

It is therefore an object of the invention to provide a continuous developing machine of the type mentioned at the outset in such a way that that a satisfactory one for various filmstrip widths Stripping off treatment liquid is possible.

The object is achieved by the invention described in the characterizing part of the attached claim 1.

With the invention it is achieved that the liquid wiper of the respective, determined by the film width The running plane follows that the wiper lips are not affected even with jerky displacements of the running plane remain and thus wipe off the liquid satisfactorily.

609882/0 932

PG 820 / KS 1103

Further details and advantages of the invention result from the subclaims j.m connection with the Description of an exemplary embodiment which is explained in detail with reference to figures. Show it:

Fig. 1 is a perspective view of an arrangement of a liquid scraper according to the invention; and

Fig. 2 shows a cross section through the liquid scraper.

In Figure 1, 1 denotes the frame of a bath container, a pulley 2 is rotatably arranged on the upper side thereof. Around the pulley 2 is a film strip 3 out, which runs from below over the hollow 2 and leaves the container in the horizontal direction. An elongated strip 4 is also on the frame 1 arranged rotatably, the pivot point is above its center of gravity. One

The axis of rotation 5 for the elongated strip 4 is horizontal attached to the frame 1 and lies approximately in the plane of the middle film run plane. At the end facing down a weight 6 is attached to the elongated strip 4,

by which the strip is held in a middle rest position. At the top of the elongated strip

- 6 809882/0932

PG 820 / MG 1103

a sciiräge rail 7 is attached, into which the liquid scraper S is inserted. The liquid sab Strip 8 can best be recognized from FIG.

In Figure 2, the rail 7 is shown, which holds the stripper 8. This scraper 8 consists of a slide 9 »on which two rubber lips 10 are attached. The slide 9 is U-shaped so that it can be easily pushed in when the film is clamped. The rubber lips 10 have a wedge-shaped tapering edge with an edge ΛΛ which rests against the film strip 3. Between the edge 11 and the fastening part of the rubber lip 10, two incisions 12 running parallel to the edge 11 are provided.

The mode of operation of the arrangement described in Figures 1 and 2 is as follows:

The liquid scraper can be used at the beginning of a developing process 8 can be pushed into the rail 7, the film strip 3 between the edges 11 of the rubber lips 10

609882/0 9 32

PG 820 / MG 1103

to be led. The distance between the Guinea lips 10 is dimensioned so that that when the film 3 passes through, the edges 11 are essentially perpendicular to the film surface. Due to the weakening of the rubber lip 10 by means of the incisions 12 it is ensured that the vertical position of the edges 11 on the 'film 3 even when it is moved is retained.

After operation, the liquid scraper 8 can be removed from the rail and washed. this is particularly advantageous because crystallization of the baths is deposited on the rubber lips, which, if they get on the film, can scratch it.

Due to the pendulum-like suspension of the liquid scraper 8 is also achieved that this is basically is held in a central position. If the film flutters, the liquid wiper can follow this movement and, due to the inertia of the "pendulum", such a fluttering movement is also made muffled. Run through the concave formation of the roller 2

- 8 609882/0 | 9 32

PG 820 / MG 1103

Films of different widths in different radii around roll 2. This means that there can also be in front of roll 2 Shift the film run level depending on the film width. Such a shift can be made by the pendulum arrangement Follow 4 to 8 easily. In both cases, the liquid wiper is also in a deflected state 8 the even pressure of the two edges 11 on the film 3 is maintained.

609882/0932

Claims (8)

AGi ¹ A-GEVAERT AKTIENGESELLSCHAFT June 20, 1975 10-pa-gl Leverkusen PG 820 / MG 1103 Patent claims (j \ y Continuous developing machine for film strips of different widths, with successively arranged bath containers for developing, fixing or bleaching and soaking, through which the film strips can be guided over rollers, and with a liquid scraper arranged at the respective bath outlet, characterized in that the liquid scraper (8 ) is movably arranged in such a way that it follows the changing running planes of the film strips (3) without any significant change in the pressure force of its wiper lips (11). 2. Continuous developing machine according to claim 1, characterized characterized in that the liquid wiper (8) is suspended like a pendulum in a vertical film running plane is. - 10 609882/0932 PG 820 / MCK 1103 3. Ihirchlauf developing machine according to claim 2, characterized characterized in that the liquid wiper (8) on a vertically extending, about a horizontal axis (5) rotatably mounted element (4) is attached, which carries a weight (6) on its underside, and that the horizontal axis (5) essentially in the middle Film run plane lies. 4-. Continuous developing machine according to one of the claims 1 to 3 »characterized in that the liquid wiper (8) is detachable from its j pendulum suspension. 5 · Continuous developing machine according to claim 4, characterized characterized in that on the vertical element (4-) one Slotted rail running diagonally to the film level (7) is attached, in which the liquid scraper (8) is retractable. 6. Continuous developing machine according to one of the claims 1 to 5i, characterized in that the liquid wiper it has a fork-shaped bracket (9), on the legs of which elastic stripping elements (10) are arranged - 11 609882/0932 PG 820 / MG 1103 are, which on one side to edges (11) have wedge-shaped edges that are in the film running plane approximately touch. 7-pass developing machine according to claim 6, characterized in that the distance between two edges (11)
/ 10 mm. 8. Continuous developing machine according to claim 6 or 7, dadurah marked that in the stripping elements (10) incisions (12) running parallel to and at a small distance from the edges (11) are provided. 1 sheet of drawings 609882/0932 Leeward