Abstract: An air flow extension system has a collection compartment with a lower section and an upper section having a plurality of tapered air flow accumulation chambers. An open interior space is located within the collection compartment. Each of the accumulation chambers has an air flow discharge opening into which air flow lines are removeably attached. The lower section of the collection compartment is fitted so that it can be snugly positioned within and over an open air flow register and remain in this position without the use of outside attachment devices. Air flows from the air flow duct through the register, into the upper section, and is accumulated in the accumulation chambers for ultimate discharge out of the openings into the air flow lines, where the air is dispensed to different locations at various distances from a register.

Abstract: An apparatus and a process for detecting surface defects on moving long metallic products utilizing linear CCD cameras for effecting exposures at successive times t1, t2,t3 . . . Tn. A processing device calculates differences observed for each pixel or assemble of pixels at the successive times and any variations in the differences makes it possible to detect defects and the extent of the defects. The use of thresholds allows for reduction in the background noise and different orientations of the optical axis of the camera permit the detection of different types of defects.