Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1981-12-03
1984-07-24
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15 95, 15306B, 15312R, B08B 908
Patent
active
044610548
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a cleaning device for cleaning the inner surface of a container which is fed along a transport path, suspended in the closed end of the container and with the opening of the container facing downwards.
The purpose of such a cleaning device is to clean the inner surface of a container so that this surface will be suitable for the application of a protective layer, e.g. a plastics layer. The object of the present invention is to construct the cleaning device so as to cause as little inconvenience as possible to the personnel which might be present in the vicinity of the device, i.e. to prevent the granulated cleaning means and dust from being hurled into the premises, and the cleaning device should at the same time desirably be so arranged that the entire operation can be performed automatically and with an efficiency as great as possible.
This is achieved according to the invention in that the cleaning device comprises a downwardly closed and upwardly open jacket which is arranged to be displaced upwardly to enclose a container to be cleaned and which contains a nozzle arrangement for ejecting a granulated cleaning means during the displacement of the jacket.
As the container to be cleaned is enclosed by said jacket during the ejection of the granulated material against the inner side of the container, the granulated material falls down to the bottom of the jacket and can immediately be removed from it and returned for use again.
An expedient embodiment of such a cleaning device is characterized in that it also comprises a corresponding, secondary jacked which is disposed adjacent said jacket and whose nozzle arrangement is adapted to eject a scavenging medium. This provides for the simultaneous treatment of two containers, one container being cleaned by means of the granulate, the other being scavenged to remove the particles that might stick more or less firmly to the inner side of the container.
To provide an additional safeguard against dust and small particles escaping into the room in which the cleaning device is mounted, particularly when the outer portion around the downwardly directed opening of the container is to be cleaned, it is expedient according to the invention that at least the first-mentioned jacket has at the upper edge a collar of dense bristles facing the axis of the jacket and disposed above the nozzle apertures of the nozzle arrangement. The bristles effectively retain dust particles, but to ensure that the bristles are cleaned again, it is expedient that the cleaning device is further arranged so that said collar of bristles is enclosed by an annular channel delimited from the interior of the jacket and connected to a suction device.
To permit complete automatization of the operation of such a cleaning device, said device may according to the invention also be arranged so that the sliding movement of the jacket or jackets is synchronized with the stepwise feeding of containers by the transport path, and that the operation of the nozzle arrangement is so synchronized with the displacement of the jacket that granulate and optionally also scavenging medium are ejected only during the period when said collar of bristles encloses a container.
The nozzle device itself is to be arranged so that it effectively sprays all internal parts of the container, but to achieve this in a simple and very effective manner with a simple arrangement of the nozzle, the cleaning device may according to the invention be arranged so that it comprises means for mutual, axial rotation of nozzle arrangement and container during the vertical displacement of the jacket.
As mentioned, the granulates used and also the scavenging medium used in the secondary jacked will be immediately removed at the bottom of the jacket, which may be provided with a discharge line for this material, but since rather large amounts of fine dust are formed, the cleaning device may according to the invention be arranged so that the lower end of the jacket is enclosed by an outer jacket to form a cylindrical suck
REFERENCES:
patent: 1644384 (1927-10-01), Kondall
patent: 2296801 (1942-09-01), Thomas
patent: 2725641 (1955-12-01), Lindsay
Einarsson Baldvin
Oehlenschlager Adam A.
AO-Engineering A/S
Moore Chris K.
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