Photocopying – Projection printing and copying cameras – Identifying – composing – or selecting
Patent
1982-07-12
1984-08-14
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Identifying, composing, or selecting
354109, 355 74, G03B 2752
Patent
active
044653646
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an arrangement for projecting an identifying image from a data carrier on to a film in a cassette having a window which may be sealed against light by a cover. An opening mechanism is provided for releasing the cover and for pushing the same open and closed. The arrangement further has a projection mechanism and switch means for triggering the opening mechanism and the exposure. The opening mechanism has an engaging device which is guided on a carriage and engages the window cover.
An arrangement of the type described above is known from the DE-AS No. 20 21 494. The engaging device is arranged on a support which is pivotally connected with the carriage. The pivot axis of the support is perpendicular to the direction of movement of the carriage. A coil spring exerts a rotational moment on the support. The support is provided with a guide roller which travels along the cassette during movement of the carriage and pivots the support into the engagement position for the engaging device.
In the known arrangement, it has now been found that an engaging device which has been moved into the engagement position remains in this position during a malfunction of the arrangement or during a drop in current. Thus, the cassette can no longer be removed from the arrangement. This is extremely impractical since the cassette, which is inserted in the arrangement with one corner, must normally be held by the operator at one end. The operator is therefore unable to eliminate the malfunction.
OBJECTS AND SUMMARY OF THE INVENTION
Accordingly, it is an object of the invention to further develop an arrangement of the type described above so that removal of the cassette is also possible during malfunctions or a drop in voltage.
This object is achieved by the invention in that the engaging device is disengageable from the window cover by means of a lifting mechanism in each position of the carriage.
A purely mechanical uncoupling of the engaging device and the cassette is effected by the invention. As a result, the cassette can be removed from the arrangement during any malfunction so that the operator is free for other activities.
BRIEF DESCRIPTION OF THE DRAWINGS
Additional details and advantages of the invention will become apparent from the following description of an exemplary embodiment which is illustrated in detail by the accompanying figures.
FIG. 1 is a schematic perspective view of the overall structure of an opening mechanism according to the invention;
FIG. 2 is a cross section of an opening mechanism similar to that of FIG. 1 but with the support plate mounted at the front side of the arrangement; and
FIG. 3 is a partially broken away plan view of the opening mechanism illustrated in FIG. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A support table of the arrangement according to the invention is indicated by 1 in FIG. 1. A first guide bar 2 is arranged on the support table 1 as is a second guide bar 3 which makes a right angle with the guide bar 2. A switch element 4 is located in the guide bar 3 and is activated upon insertion of a film cassette. Similarly, a non-illustrated switch element is located in the guide bar 2 and can penetrate into a standard depression in a film cassette so that it is not actuated by a properly positioned cassette. The combination of these two switch elements serves to detect the presence of a cassette and to determine whether this is properly positioned.
Support columns 5 are provided outside of the range of insertion of the cassette and carry a mounting plate 6. A motor 7 is arranged on the upper side of the mounting plate 6. A crank and cam disk 9 is secured to the downwardly directed shaft 8 of the motor 7. A support arm 10 is further secured to the upper side of the mounting plate 6. A tension spring 11 for a pivotable support plate 12 is suspended from the support arm 10. In this example, the support plate 12 is supported at the rear side of the apparatus. The support plate 12 has two lateral portions 12a and a shaft 13 i
Farber Heinrich
Krobel Heinz
Muller Jurgen
Agfa-Gevaert Aktiengesellschaft
Kontler Peter K.
Wintercorn Richard A.
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