Material or article handling – Device for emptying portable receptacle – Nongravity type
Patent
1992-07-21
1994-06-14
Bucci, David A.
Material or article handling
Device for emptying portable receptacle
Nongravity type
271 11, 271107, 532844, G03B 4204
Patent
active
053204760
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a device for removing a sheet film from a cassette with a suction means, said device bending the area of the sheet, which has been attracted by the suction means, towards the sheet plane in order to release the sheet to be removed.
BACKGROUND OF THE INVENTION
In a known device of this type (DE 37 16 904-A1) the suction device is moved into an open cassette by means of a lever linkage and, together with the attracted sheet film, moved in the reverse direction into the area of transport rollers which further advance the sheet film removed. The bending of the attracted sheet film to release it and a compensation in height for adjustment to different cassette sizes is attained by the elasticity of specially designed suction elements and their movable mounting. However, the suction elements of this known device have only a limited range of movement. Moreover, the drive of that suction device is not sufficiently smooth and cannot be optimally controlled for adjustment to the speed most favorable for meeting the various requirements during a sequence of motions.
It is the object of the invention to design a device of the generic type such that the suction device can be reliably controlled for proper functioning and can be moreover driven such that it runs smoothly.
SUMMARY OF THE INVENTION
In one aspect of the present invention there is provided a device for removing film from a cassette with a suction mechanism. The device bending the area of the sheet film, which has been attracted by the suction mechanism, toward the sheet plane in order to release the sheet to be removed. The device is such that
the suction device is movable to and fro on a positively guided carriage,
the carriage is guided on two parallel plates each having first and second symmetrical guide slots arranged at a distance from each other,
the first and second guide slots each comprise sections pointing in the same direction and arranged side by side at an angle inclined towards the open cassette,
the second guide slots face the cassette and comprise sections whose end areas adjacent to the cassette are bent off downwardly,
one end of a bar is hinged in the area of the carriage guided on the second guide slot, the other end of said bar being hinged to a motor driven toothed belt mounted on the plate, and
the carriage consists of a guide member engaging the guide slots and a carrier which is arranged on said guide member and mounted for shifting, pivotal and tilting movement relative to said guide member and on which the suction device is mounted for tilting movement.
According to an advantageous modification of the invention the toothed belt driving the carriage is arranged in an angular position relative to the downwardly inclined guide slots such that the carriage when moving into the downwardly bent sections of the guide slots slows down the downward movement of the suction elements.
According to another advantageous modification the carriage moves in the guide slots of the plates by means of guide rollers supported by ball bearings, which causes the carriage to run very smoothly and reduces the force required for its drive. The plates are connected by spacer bolts such that they enclose a compact assembly group. The plates of the assembly group are advantageously provided With open recesses which allow them to be prepositioned in the intended sheet-film transport path. Advantageously, the plates have mounting holes into which mounting bars positioned on the device can be shifted so that the assembly group can be accurately positioned and secured in the transport path of the sheet film by a simple plugging operation.
The device according to the invention is particularly advantageous in that the suction device can be driven with a relatively small power input to run very smoothly and can be adjusted to any desired sheet-film removal path and in that the suction elements can be placed on the film at a reduced speed, without the motor drive having to be influenced for this purpose, so that
REFERENCES:
patent: 2520628 (1950-08-01), Elsner
patent: 4702061 (1987-10-01), Richardson
patent: 4759679 (1988-07-01), Muller
patent: 5031892 (1991-07-01), Stieger
patent: 5080344 (1992-01-01), Hayashi
Hoitz Gerd
Weber Guenter
Bucci David A.
Eastman Kodak Company
Pincelli Frank
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