Abstract: An improved elevator pad assembly includes a plurality of closely spaced, flexible loops secured to the backside of a protective elevator pad, preferably within the upper margin near the top edge of the pad. In one embodiment, the loops are formed as part of a narrow mounting strip affixed to the back cover of the pad. Each loop lies hidden from view below the upper edge of the pad, and remains hidden from view even when fastened to a wall stud or other mounting hardware affixed to the elevator cab walls or ceiling. The flexible loops eliminate the need for grommets and make it easy to mount the pad assembly on elevator cab mounting hardware, allowing the elevator pad to be neatly positioned against the wall without bunching or sagging.

Abstract: A collapsible box having sidewalls secured together at the corners of the box by first and second loop elements fastened to two adjacent sidewalls. As disclosed, each loop element includes two tapered end portions adjacent one another driven into a sidewall, to secure the loop element thereto, and two elongated portions extending along the sidewall from the tapered end portions, terminating in a loop at a corner of the box. The sidewalls of the box meet at the corner to produce a recess, and a fastening wire is passed through the loops of the loop elements on the two adjacent sidewalls, with the ends of the wire twisted together to secure the two loop elements to one another in the recess. The forces produced serve to hold the box together and to hold the loop elements against the sidewalls. The loop elements are also stapled to the sidewalls.

Abstract: A process is described for purifying liquids by cryogenic sublimation. This process involves solidifying the liquid by reducing the temperature and pressure to below the triple point. Purification is then carried out by direct transformation from the solid to the vapor phase. Because of increased differentials in vapor pressures at the low temperature at which the procedure is carried out, this purification process is highly efficient and is also particularly suitable for liquids that are susceptible to decomposition with ordinary purification procedures requiring elevated temperatures. The procedure is also advantageous in separating azeotropes, structurally similar compounds, as well as treating flammable, hydroscopic, corrosive and fuming compounds.