| 摘要 |
Tighthead barrel (1) is blow molded from thermoplastic. Top (4) which is arched to the outside has dome shape (9) and with its outside edge (10) at distance (a) under bearing surface (7) of carrying and rolling ring (5) which is pointed perpendicularly or obliquely to barrel axis (6-6) at a steep slant angle runs into top end section (11) of barrel jacket (2). Carrying and rolling ring (5) projects upward in the direction of barrel axis (6-6) above crown (16) of top (4). Arched stacking surface (17) of top (4) passes into two ramp-like deck sections (19, 20), which border deck surface (18) of recess (12) for filler and drain plug (14), which emerge in the peripheral direction of the top, and which run with a slight gradient from central stacking surface (17) of top (4) to deck surface (18) of recess (12) for filler and drain plug (14) and via which in the slightly tilted head position of tighthead barrel (1) the residual liquid which emerges through hole (25) of filler and drain plug (14) and which collects on inside (23) of top (4) drains, ramp-like deck sections (19, 20) being made as bridges and forming gutters (21, 22) which run on outside edge (10) of top (4).
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