Abstract: A can end (10) has a curl (14) extending circumferentially about a longitudinal axis (50). A circumferential wall (15) extends downwardly. A strengthening member (16) is joined to lower segment of the circumferential wall (15). A center panel (12) extends radially inwardly from the circumferential strengthening member (16). A rivet (38) attaches a tab (28) to the center panel (12). A cover is attached to the tab (28) and is rotation therewith. A frangible score (24) in the center panel (12) is breakable to form a pour opening (27) in the center panel (12). The cover is rotatable to overlay the pour opening (27) and effectively reclose the pour opening (27) in a reclosed condition of the can end (10).

Abstract: Embodiments of the present invention provide enhanced methods of calibrating arbitrary waveform generators using s-parameters, and arbitrary waveform generators calibrated according to those methods. Methods are provided for calibrating a single, non-interleaved channel of an arbitrary waveform generator, calibrating multiple interleaved channels, and calibrating pairs of channels, both interleaved and non-interleaved, to generate differential signals.

Abstract: A catalytic converter block is wrapped in a loose laminate of plastics material and a mat fibrous material, the plastics material being secured to the block at one end and continuing beyond the mat of fibrous material to cover same completely. The plastics material is secured under tension so as to compress the fibrous material to facilitate fitting in a casing for the converter block.