Lidded drum

Abstract

A lidded drum of synthetic material includes a clamping ring of metal for fastening the lid on the upper drum rim, wherein the clamping ring is U-shaped in cross section and engages in the closed state with its upper leg over the lid rim and the lower leg engages under an annular contact surface of a border of the drum wall. The contact surface extends perpendicularly or obliquely relative to the longitudinal axis of the drum. The contact surface is arranged below the upper drum rim and constitutes the upper limitation of an indentation in the upper portion of the drum wall. The lid rim formed by an inner rim, an outer rim, and a connecting ring, has a U-shaped cross sectional profile which is open toward the bottom and includes a sealing bed for placing or foaming a lid seal therein, wherein the lid seal is pressed in the closed state of the drum lid by the clamping force of the clamping ring against the upper lid rim. An annular bead is integrally formed on the connecting leg of the upper and lower legs of the clamping ring, wherein the annular bead is directed radially inwardly and, when the clamping ring is closed, the annular bead rests in a positively engaging manner against the outer rim of the lid for securing the lid on the upper lid rim.

1 . A lidded drum of synthetic material comprising a clamping ring of metal for fastening a drum lid on an upper drum rim, wherein, in a closed state, a clamping ring having a U-shaped cross section engages with an upper lid thereof over a lid rim, and engages with a lower leg under an annular contact surface of a border of the drum wall which extends perpendicularly or obliquely relative to a longitudinal axis of the drum, wherein the annular contact surface is arranged under the upper drum rim and forms an upper limitation of an indentation in an upper portion of the drum wall, and wherein the lid rim formed by an inner rim, an outer rim, and a connecting ring, has a downwardly open U-shaped cross sectional profile with a sealing bed for placing or foaming a lid seal therein, wherein, in the closed state of the drum lid, the rim seal is in the closed state of the drum lid pressed against the upper drum rim by the clamping force of the clamping ring, further comprising an annular bead formed on the connecting ring between the upper and lower legs of the clamping ring, wherein the bead is directed radially inwardly and, when the clamping ring is closed, the annular bead engages positively on the outer rim of the lid for securing the lid on the upper drum rim.  
   
   
       2 . The lidded drum according to  claim 1 , wherein the outer rim of the lid has an engagement groove for the annular bead of the clamping ring.  
   
   
       3 . The lidded drum according to  claim 1 , comprising a lower support ring for the annular bead of the clamping ring which acts on the support ring, wherein the support ring is integrally formed on the outer rim of the lid rim.