Photocopying – Projection printing and copying cameras – With developing
Patent
1991-01-28
1992-03-24
Hix, L. T.
Photocopying
Projection printing and copying cameras
With developing
G03B 2752
Patent
active
050992740
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention relates to a device for transporting film sheets and sheets of photographic paper, in particular X-ray film sheets, from a cassette loading and unloading unit to a processing unit.
Devices are known which allow X-ray film cassettes to be loaded with X-ray film sheets and also to be unloaded in daylight, i.e. outside a darkroom. The unloaded, exposed X-ray film sheets are then immediately fed from the loading and unloading unit to a film processing unit where they are processed in a chemical processing bath and a fixing bath to produce an X-ray film image which is stable in daylight.
The operating speed of a film processing unit, however, is substantially slower than the unloading speed of a loading and unloading unit. This is why a device is provided between the two units, which adjusts the different speeds to each other. Such a device may consist of a guide path which is arranged between the exit of the one unit and the entrance of the other unit and comprises one or several pairs of rollers for slowing down the speed of a passing X-ray film sheet.
There are, however, different types of processing machines for various purposes which differ from each other both by their outer dimensions and by the construction of their film-guiding elements. This results in that the entrance openings for the X-ray film sheets in different processing units, are arranged at different heights, i.e. at varying distances from the bottom.
It is the object of the invention to provide between a cassette loading and unloading unit for X-ray film sheets and a processing unit a device for slowing down the speed of the passing X-ray film sheets such that said device is on the one hand exchangeable by only a couple of simple manual operations and that it is on the other hand of simple construction and applicable to all types of processing machines having entrance openings arranged at varying heights.
In accordance with the invention this object is attained in that a housing is held and lockable between the loading and unloading unit and the processing unit, in that said housing comprises one or several entrance openings and one or several exit openings for the passage of film sheets and in that within the housing, a single transport table is selectively insertable and held between any of the entrance and exit openings.
In detail the invention provides that locking means which can be manually operated from outside are arranged on the housing and that holding means are disposed on the loading and unloading unit as well as on the processing unit and cooperate with said locking means. The holding means consists of a pin whose end, which extends into the housing, comprises an annular groove, whilst the locking means consists of a rotary shaft mounted in the housing and having a recess in the area of the annular groove such that when the locking means is in its locking position the shaft is brought into locking engagement with the annular groove and when the locking means is in its unlocking position the recess is positioned in the path of movement of the pin. The rotary shaft is provided with a grip portion at its end projecting out of the device.
In this manner the device can be easily and speedily attached and removed if a processing unit or a cassette loading and unloading unit is exchanged or if repairs become necessary.
In order to adapt the position of the transport table to various heights of entrance openings of processing units, the rotary shafts are designed so as to extend across the total width of the housing and are arranged in the housing such that they are associated with the entrance and exit openings in the housing. Moreover, vertically upright wall portions are provided on either end of the transport table, which include guide slits communicating with the exterior and enclosing at least one of the shafts in any of the operating positions of the transport table. At one end of the transport table, the guide slits are provided in mounting plates which are arranged on the transport table so as to be
REFERENCES:
patent: 4582448 (1986-04-01), Costello et al.
patent: 4734743 (1988-03-01), Gregory
Mirlieb Bernd
Weber Gunter
Childress G. Herman
Eastman Kodak Company
Hix L. T,.
Rutledge D.
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