Sheet feeding or delivering – Feeding – Separator and conveyor
Patent
1989-10-16
1992-02-11
Olszewski, Robert P.
Sheet feeding or delivering
Feeding
Separator and conveyor
271106, 271107, B65H 508
Patent
active
050870246
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a device for removing a sheet from a container, in particular a sheet film from a cassette, said device comprising a novel suction device and mounting for the suction device. The suction device bends off towards the plane of the sheet the section of the sheet which it engages in order to release the sheet to be removed.
BACKGROUND ART
The use of suction to remove film from a cassette is known. See, for example, DE-OS 30 00 760 Offenlegungstag July 16, 1981. In that apparatus, a suction device is lowered by means of a pneumatic control such that the sheet-film section engaged by the suction device is separated from the sheet-film stack located below. The sheet film thus separated is then lifted from the sheet stack and transported to the intended depositing location. The separation of the sheet film and the transport of the sheet film are controlled by means of complex cam-controlled linkages and by pneumatically actuated means. See also EPA 0110649 published June 13, 1984 relating to a copier.
DISCLOSURE OF THE INVENTION
The present invention provides a much simpler and very reliable apparatus using suction. In accordance with the invention the suction device comprises a suction element guided in a rectilinear movement at an angle with respect to the plane of the sheet and having at least one flexible suction member. According to a useful modification of the invention, the suction element is arranged at the free end of a reciprocating crank drive movable into an open cassette. According to a further useful modification of the invention, an arm supporting the suction element has a cam-shaped contour resting against a stationary, rotatable roller and controlling the movement of the suction element. Advantageously the suction element according to the invention is designed as a suction bar having one or several suction members and comprising in its two end sections web-shaped projections which positively engage a slot guide. The slot guide for the suction bar is advantageously arranged at the free ends of parallely disposed arms which are mounted to a shaft movable by a crank arm.
BRIEF DESCRIPTION OF THE DRAWINGS
Further features and advantages can be inferred from the description of embodiments of the invention illustrated in the drawings and from the subclaims. In the schematic drawings,
FIG. 1 is a lateral sectional view of the device;
FIG. 2 is a partial view of the device according to FIG. 1 illustrating the individual operating steps;
FIG. 3 is a front view of the device according to FIG. 2;
FIG. 4 is an enlarged detail of the device according to FIG. 2 at the moment at which the sheet film is seized;
FIGS. 5-7 are details of the device according to FIG. 2, with a stepwise presentation of the sheet-film releasing operation;
FIG. 8 shows the device according to FIG. 2 at the moment of the sheet-film loading operation; and
FIG. 9 shows a second embodiment using a different cassette.
MODES OF CARRYING OUT THE INVENTION
The subject matter of the invention will be described with reference to a device 1 for unloading and reloading X-ray film cassettes 2. The device comprises a light-tight housing 1 in which a plurality of supply magazines 3 are arranged one on top of the other. Each of the supply magazines contains a different sheet-film size. Above the supply magazines 3, a light-tight cassette unloading and reloading station 4 is arranged in which a cassette 2 is located on a transport belt 5 so as to be movable into and out of the station.
Opening means of a known type (for example a suction device engaging the upper portion of the cassette), not illustrated in detail, are situated in the unloading and reloading station 4 for operating the cassette cover 2a. The unloading and reloading station 4 is closable at its entrance and exit sides by doors 42 not illustrated in detail (FIG. 2 showing only one door). A device 6 for removal of a sheet film from the cassette 2 is located adjacent to the unloading and reloading station 4 and will be described in more
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Mirlieb Bernd
Sachs Gunter
Childress G. Herman
Eastman Kodak Company
Milef Boris
Olszewski Robert P.
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