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Waterline of a ship. The mark above the waterline indicates the Plimsoll line. The waterline is the line where the hull of a ship meets the surface of the water.. A waterline can also refer to any line on a ship's hull that is parallel to the water's surface when the ship is afloat in a level trimmed position.
USS Samuel B. Roberts: After an Iranian mine holed the frigate beneath the waterline in 1988, the crew fought fire and flooding that threatened to sink it. [ 1 ] USS Princeton : After an Iraqi naval mine damaged the cruiser during the 1991 Gulf War , her crew fought fires and sealed cracks in the hull, then repaired electronic systems, bringing ...
Prior to the development of the tape dispenser, 3M's standard clear scotch tape was sold as a roll, and had to be carefully peeled from the end and cut with scissors. To make the product more useful, the scotch tape sales manager at 3M, John Borden, designed the first tape dispenser in 1932, which had a built-in cutting mechanism and would hold the cut end of the tape until its next use.
The shape of the seam is determined by the shape of the first operation roll, the second operation roll, their relative positions and distances, lifter height, lifter pressure. Any damage or problems to the seamer or seamer tools can cause severe problems to the double seam like seam bumps, wrinkles, sharp seams, and open seams.
The load line is a waterline that corresponds to the maximum draft of the ship, thus yet another name, load waterline. [2] Varying water temperatures will affect a ship's draft , because warm water is less dense than cold water, providing less buoyancy.
It is most commonly used for regular slotted containers (RSC) and can involve adhesive (cold water-borne or hot melt adhesive), box sealing tape, or gummed (water activated) tape. By contrast, a case erector is equipment for setting-up flat (knocked-down) corrugated boxes and applying a closure to the bottom flaps.
Oakum and tools for caulking Hemp Prisoners picking oakum at Coldbath Fields Prison in London. Oakum is a preparation of tarred fibers used to seal gaps. Its traditional application was in shipbuilding for caulking or packing the joints of timbers in wooden vessels and the deck planking of iron and steel ships. [1]
Incorrect (left) and correct (right) seams. The production of a high-quality double seam is dependent on several factors, including conformity to the set can and end specifications, the quality of the seamer tooling used and its compliance with the can and end being used, the condition of the seaming machine and the setup of the seaming rolls, lifter pressure and other components.