Photocopying – Contact printing – Light boxes
Patent
1983-05-18
1985-05-21
Mathews, A. A.
Photocopying
Contact printing
Light boxes
355 28, 271184, 271225, G03D 1300, G03B 2758
Patent
active
045182418
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an installation for supplying sheets of photographic emulsion carrier into the input slot of a developing machine.
Developing machines, for example of the type described by DE-AS No. 26 15 905, have a relatively large working width for processing wide emulsion carrier webs, so that large format emulsion carriers can also be developed. Furthermore, developing machines have a definite maximum developing capacity, that is, a maximum number of emulsion carriers which can be developed with respect to time, and this number is determined by the time required for the developing and washing procedure and cannot be increased by any given bath composition.
In photographic laboratories which are not fully automated, when working with emulsion carrier webs which are wound on spools, an exposed emulsion carrier spool is suspended intact in the developing machine or input, and then runs continually into the developing machine. Aside from the fact that the transfer of an exposed emulsion carrier web to the developing machine has to be carried out in a darkened area, there is practically no possibility of fulfilling, for example, rush orders, and of running individual photographs through the developing machine on a priority basis, separated from the remaining exposed sections of the emusion carrier web.
Therefore, by using the total working width of the developing machine, it should be possible to run interposed individual photographs through the developing machine in an accelerated manner, despite working with emulsion carrier webs. For this purpose, with an installation for supplying sheets of photographic emulsion carrier into the input slot of a developing machine, a transfer installation is arranged, according to the invention, between an exposure easel which is provided with an emulsion carrier feed device, and the input slot, and this installation separates the emulsion carriers, is swivelable about an axis which is perpendicular to the feed direction and is movable along the input slot. This results not only in the desired, flexible potential, but it also results in an increased total number of developed emulsion carriers per unit of time, without having to increase the time for the emulsion carriers to run through the developing machine.
The invention can be further developed into a mini-laboratory which can be operated in full daylight by having the exposure easel, the transfer installation and the input slot of the developing machine lodged in a light-proof cabinet which is advantageously arranged in front of the front input wall of the developing machine, and on the working surface of the cabinet an illumination station is mounted for film negatives.
The invention, with its advantageous further developments appears in the following description, in which reference is made to the attached drawings. Shown in the drawings are:
FIG. 1 a schematic illustration of a top view of a mini-photographic laboratory embodying the invention;
FIG. 2 is a schematic side view of an assembly unit composed of a cabinet and developing machine, with partially cut open side walls;
FIG. 3 a schematic top view of the transfer installation with the input slot of the developing machine;
FIG. 4 a sectional view of a portion of the installation along the line III--III from FIG. 3;
FIG. 5 a block wiring diagram explaining the operational technique of the installation;
FIG. 6 a detail from the sliding carriage of the transfer installation.
In essence, the mini-laboratory is comprised of three units, namely a film developing machine wholly described by 8, which is not the subject matter of the invention, a cabinet 10 which is built-on in front of the front side of the developing machine 80, as well as possibly a salescounter 7. The assembly unit, which embodies the invention comprised of a cabinet 10 and developing machine 80, is approximately the height of a table, so that on the upper working surface 16 (FIG. 2) of the cabinet 10 an illumination installation 12, which is only schematically outlined, can be set onto i
REFERENCES:
patent: 3308717 (1967-03-01), Okishima et al.
patent: 4126391 (1978-11-01), Nishimoto
patent: 4136946 (1979-01-01), Nishimoto
patent: 4191369 (1980-03-01), Matsuda et al.
patent: 4260234 (1981-04-01), Burton
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