Abstract At the present time, open-top drums are sealed with a gasket resting on the top edge of the drum, causing it to be crushed when the drums are stacked. A more desirable way to seal these drums is to place the gasket on the side, covering the crack between the top and the drum, and pull it up against the crack with the lever or bolt-type ring. The tops of drums used for tallow or tomato paste or any other products that thicken or solidify upon cooling, must be cut out to remove the contents. In prior art, these drums are cut around the inside of the chime or top of drum. To reclaim these drums it is necessary to roll down the top edge of the drum, stretch it in a mechanical device to return it to the original volume, then furnish a new top and ring. A more desirable method to reclaim these drums is to cut off the tops around the side, about halfway down the top seam. This makes it possible to use the same top and a lever or bolt type ring can be used to hold the top on and the gasket in place. Also, the same capacity is maintained.
An improved closing ring assembly for open top drums in which the top seam around the perimeter of the drum is cut from the outside of said drum about halfway down the seam allowing a substantial portion of said seam to remain both on the drums side and on its cover, allowing the entire top of the drum to be removed in one piece, comprising a closing split ring provided to clamp the cover on the drum, said ring being formed in a channel section with the top flange being longer to fit over the top chime on the cover and the lower flange being smaller to fit against the drum under the portion of the seam remaining on the drum, a closing device for the ring, the upper flange being tapered downward at its outer perimeter to provide a downward clamping effect as the ring is drawn tight around the drum and cover by the closing device, a space provided in the channel section of the closing ring, a gasket located in the space which is pulled into the cut in the top seam of the drum from the side and makes an air tight seal as the split ring is closed by the closing device.
Claim 2
Dependent Claim
207 words
An improved closing ring assembly for open top drums in which the top seam around the perimeter of the drum is cut from the outside of said drum about halfway down the seam allowing a substantial portion of said seam to remain both on the drums side and on its cover, allowing the entire top of the drum to be removed in one piece, comprising a closing split ring provided to clamp the cover on the drum, said ring being formed in a channel section with the top flange being longer to fit over the top chime on the cover and the lower flange being smaller to fit against the drum under the portion of the seam remaining on the drum, a closing device for the ring, the upper flange being tapered downward at its outer perimeter to provide a downward clamping effect as the ring is drawn tight around the drum and cover by the closing device, a space provided in the channel section of the closing ring, a gasket located in the space which is pulled into the cut in the top seam of the drum from the side and makes an air tight seal as the split ring is closed by the closing device.
Claim 3
Dependent Claim
122 words
A closing ring assembly as in claim 1 in which all of the weight placed on top of the drum is transferred to said drum''s siDewalls through the metal to metal contact between the drum''s top and sidewalls leaving the gasket free to perform only the air tight seal of the cut between the cover and sidewall of the drum, said closing device comprising a lever type closure in which a lever is hinged to one end of the split ring and a hinged ring is attached to the other end of the split ring, the other end of the hinged ring being attached to the lever at a point above the connection to the split ring to give a lever action.
Claim 4
Dependent Claim
50 words
A closing ring assembly as in claim 1 in which said closing device comprises a bolt type closure in which a lug is provided on each end of the split ring and a bolt runs through holes in the lugs to pull the ring together to provide the clamping action.