Abstract: A method of embossing a crown cap comprises the steps of : detecting a pre-printed drawing on the bottom of the crown cap, varying the angular positioning of the crown cap so as to position the drawing according to a preset positioning, and impressing a raised/recessed pictogram on the bottom of the crown cap. The pre-printed drawing and the embossed pictogram will have a desired reciprocal position.

Abstract: A method of scoring a metal panel such as a can end lid includes forming a first scoreline having a base and a pair of lateral walls and subsequently forming a second scoreline within the first scoreline by indenting a portion of the first scoreline base. The final scoreline may be created by employing two or more scoring operations after the first scoreline has been formed. The apparatus preferably includes a press which supports the first scoring die and second scoring die in such a manner as to establish the desired sequence of scoring operations. This method and associated apparatus provide a scored metal panel or container lid having improved performance characteristics. The resultant lid is characterized by reduced residual strain.

Abstract: The residual of an easy open can end is controlled by a band heater mounted on the anvil in conversion system tooling. The separation at closest approach of the score and anvil in the conversion tooling is altered as necessary by thermal expansion and contraction of the anvil as determined by the power supplied to the band heater. An electrical circuit supplies power to the heater and includes a thermocouple for maintaining the anvil at a set temperature. A loop control periodically diverts a finished end from the conveyor, measures the residual and adjusts power to the heater if necessary to bring the residual into specification.

Abstract: A rupturable can member (10) of sheet metal has a pair of scorings (16) which define a tearing strip (18) laterally. Welded onto the tearing strip (18) is a tongue (20) which has a thickened portion (24) at its welded-on end (22). This thickened portion is formed by a margin folded back towards the other free end (26) of the tongue (20).

Abstract: A can body is rolled from a sheet-metal blank (28) and has outer and inner longitudinal edges (12 and 14 respectively) which are welded to one another in an overlapping manner. Extending round the can body transversely to the longitudinal edges (12, 14) are two circumferential scorings (16) which define a tearing strip (18) laterally. The tearing strip (18) is extended by a tongue (20) which is welded onto the outer longitudinal edge (12) and which can be gripped by a key and rolled up. In a welding zone (42) which is adjacent to a starting scoring (30), the tearing strip (18) is stiffened by the welded-on tongue (20) in such a manner that it tears away from the can body reliably along the circumferential scorings (16) during the rolling up of the tongue (20).

Abstract: In the production of metal cans, a sheet metal body plate (blank) is scored with aligned upper and lower score lines and then formed into a cylindrical single can body. Preferably the scoring is in steps; first, scoring the upper score line using a scoring roller and an anvil wheel; and, secondly, scoring the lower score line using a second scoring roller and a second anvil wheel. Then the single can bodies are conveyed by a conveyor belt and rolled over the knife edge (parting edge) of an elongated parting rail, with the parting edge aligned with the score line and with the conveyor applying pressure on each can body to part each one on the parting edge, thereby forming two can bodies from the single can body.