CAPPING DEVICE Russian patent published in 1995 - IPC

FIELD: capping technique. SUBSTANCE: threaded cap made of high-rigidity thermoplastic material has horizontal end-face wall 1 and cylindrical rim 2. Inner surface of end-face wall 1 has locating place with packing ring 3. Upper portion of rim 2 has four screw threads 4 each of them being positioned at an angle of 90 deg. Rim 2 has also intermediate portion 5 connected with threaded portion by weakened sections formed by bridge links. These weakened sections together with clamping zone form tear-off strips. Inner surface of lower portion 7 of rim 2 has annular holding rib 8 interrupted in four sections 9 each of them extending through 20 deg. EFFECT: improved quality of seal-capping. 3 cl, 11 dwg