Dispensing – With cleaning means
Patent
1980-12-23
1983-04-19
Skaggs, H. Grant
Dispensing
With cleaning means
222399, 222529, 239113, 134102, 137240, B67D 108
Patent
active
043803083
ABSTRACT:
An apparatus and method are disclosed for dispensing adhesive materials, with the apparatus being self-cleaning for changeover of the adhesive supply.
Adhesive is provided in a sealed container, which can be subjected to pressure. As the container is subjected to increased pressure, some of the adhesive travels upwardly through a dip tube and exits through an opening in the lid in the container. The dip tube communicates with a flexible conduit which leads to a dispenser for the adhesive. The adhesive travels through the dip tube, flexible conduit and dispenser in a first, outward direction when the adhesive is being dispensed.
To purge the dip tube, flexible conduit and dispenser of adhesive, the open end of the dispenser is operably connected to a source of compressed air, and the air enters the dispenser, and travels through the flexible conduit and the dip tube until it enters the container. Thus, the air travels through the flexible conduit in a second, opposite, inward direction for flushing the adhesive material out of the dispenser, flexible conduit and the dip tube and back into the container.
REFERENCES:
patent: 2016926 (1935-10-01), Josepowitz
patent: 2023854 (1935-12-01), Petricone
patent: 2189950 (1940-02-01), Gump
patent: 3371822 (1968-03-01), Galloway
patent: 3424349 (1969-01-01), Vance
patent: 4033481 (1977-07-01), Hicks et al.
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