Bottles and jars – Closures – Cap type
Patent
1992-10-20
1994-01-04
Shoap, Allan N.
Bottles and jars
Closures
Cap type
215354, 215356, 215364, 215360, 215332, 215DIG3, 215247, 215261, 215 122, B65D 5300
Patent
active
052752992
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a closure device for a front side of an in particular evacuable cylindrical housing, comprising a cap enclosing the front side of the cylindrical housing, a front wall in which a bore is arranged, and a sealing device arranged between the bore and an inner space of the housing.
According to Austrian Patent Specification 379,069 of the same Applicant, a closure device for a cylindrical housing, in particular a blood-sample tube, has already been disclosed, which closure device is formed by a cap enclosing an open front side of the cylindrical housing. Arranged in the cap is a bore and provided between the latter and an inner space of the housing is a sealing device. Provided in the bore or in a tubular extension adjoining this bore are projecting portions which protrude beyond the surface of the cap and are covered by the sealing device. Depending on the adhesion force between the sealing device and the cylindrical housing, opening of the closure device without the escape of the medicines or body fluids contained therein could not always be ensured.
In addition, a plurality of closure devices for cylindrical housings, in particular for keeping medicines or body fluids, have been disclosed in which one-piece or multi-piece caps have been used with sealing devices. Thus it is known to close the open front sides of the cylindrical housing with stopper-like sealing devices which are fixed in turn in these enclosing caps, as, for example, according to U.S. Pat. Nos. 4,465,200 and 4,205,754 and 4,089,432, European Patent Specification 129,029 and European Offenlegungsschrift 257,498. A disadvantage in these closure devices is that partly very high forces have to be applied in the longitudinal direction of the cylindrical housing in order to overcome the adhesion forces between the sealing device and the cylindrical housings so that medicines or body fluids stored in these housings can escape time after time and thus chemical burns or infections, in articularduring the processing of blood infected with Aids, can occur. It is also a disadvantage in these closure devices that, when the sealing device is pierced through with a needle to remove the contents, unintentional opening of the closure device can occur.
The object of the present invention is to create a closure device for a cylindrical housing, in particular a blood-sample tube, with which a reliable gas-tight closure of the inner space of a cylindrical housing of this type can be maintained even for a prolonged storage period and which enables careful opening but also prevents sudden escape of the contents from the cylindrical housing. In addition, a relative movement between the closure device and the cylindrical housing in the longitudinal direction of the same is to be effectively prevented.
This object is achieved when the cap is connected via a coupling device to the sealing device and/or the cylindrical housing. This measure, which appears simple, ensures in a surprisingly simple manner that the opening movement need not take place solely in the longitudinal direction of the cylindrical housing, as a result of which the suction effect as well as the tensile force exerted on the closure device can be reduced. Thus the sealing device can be prevented from coming suddenly out of the cylindrical housing, and thus the risk of the contents, such as a medicine or blood, spurting out when the cylindrical housing is opened can be reduced.
In a further embodiment it is also possible for the sealing device to have an encircling sealing surface, allocated to an inner bearing surface of the cylindrical housing, and a sealing surface running perpendicularly to the longitudinal axis of the cylindrical housing. This ensures that a gas-tight seal of the open front end both relative to the encircling shell or the inner surface of the cylindrical housing and also perpendicularly to the longitudinal axis of the cylindrical housing is obtained with the sealing device.
Furthermore, it is also possible for the sealing surfaces encircling in an annula
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Konrad Franz
Lederer Manfred
Pakanecz Gunther
C. A. Greiner & Sohne Gesellschaft mbH
Schwarz Paul A.
Shoap Allan N.
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