摘要:
This invention relates to a method and apparatus for improving rolling mill efficiency by providing modified fixed setup parameters according to the class of the material being rolled through the following steps: (1) divide the products produced by the rolling mill into hardness/rollability classes; (2) empirically establish a set of fixed interstand thicknesses for each class which produce desired operational characteristics, such as constant thermal operation; and (3) vary the entry thickness for a particular product in accordance with the set of fixed interstand thicknesses for its class proportionally based on the desired exit thickness.
摘要:
An electrical cable and method for making the same. The cable includes a plurality of conductors formed into a bundle and surrounded by an armor sheath. A barrier, formed of polyester or polypropylene tape, is disposed directly between the bundle of conductors and armor sheath. The tape is formed into layers, each layer extending over the length of the bundle of conductors. The tape has a thickness of about 1.5 to 2.0 mils. The preferred form of tape has longitudinally extending corrugations providing a corrugated thickness of 8.0 to 10.0 mils. Each layer of tape is applied either helically or longitudinally wrapping the tape around the bundle of conductors. The barrier separates the bundle of conductors and the armor sheath and provides impact resistance against the armor sheath being driven into contact with the conductors.
摘要:
A cast composite material is made from particles and a matrix alloy of preselected composition that is difficult to wet to the particles. A wetting alloy having a composition that readily wets the particles is first mixed with the particles under conditions that wet the wetting alloy to the particles. The wetting alloy is selected so that is has no alloying elements in excess of that in the preselected matrix alloy, and preferably with wettability inhibiting elements reduced. After wetting and mixing have been achieved, the remaining alloying ingredients are added to the melt to adjust the matrix to the desired composition. The approach is applicable to cast composite materials containing both reactive and nonreactive particles. (aluminum matrix with silicon additions).
摘要:
An elongated ceiling conversion strip 28 comprising an elongated flat central web 32, an upper flange portion 34 extending upwardly from the inner longitudinal edge of web 32 and an array of spaced mounting brackets 42 depending from said web, each of said mounting brackets comprising a lower flange portion 44 extending downwardly from said web and a pair of mounting flanges 46 and 48 extending longitudinally from said lower flange portion, each of said mounting flanges extending in opposite directions from each other. A ceiling assembly for utilizing conversion strip 28 comprising a drop-in ceiling assembly 10 and a linear ceiling assembly 14 is also disclosed.
摘要:
In the coating of a major surface of a strip article, wherein the strip surface is advanced longitudinally past a dam and, immediately beyond the dam, past an extended wall spaced from the strip surface by a gap equal to a desired wet coating thickness, a first liquid coating material is applied to the strip surface ahead of the dam and a second liquid coating material is delivered under pressure to the gap beyond the dam through one or more apertures in the wall to produce a stripe or stripes of the second coating material. The apertures can be provided in a rotatable disk, constituting a portion of the wall; rotary movement of the disk angularly displaces the apertures so as to vary the location and spacing of the produced stripes, for example in a manner simulating the appearance of natural wood grain.
摘要:
In the coating of a strip article of indeterminate length, wherein the article is continuously advanced lengthwise past a dam while liquid coating material is supplied to a major surface of the article ahead of the dam, the article is passed through a gap of extended length immediately beyond the dam, the gap being defined between uniformly spaced walls one of which faces the article surface bearing the coating material. The spacing between the gap walls is equal to the thickness of the strip article plus a desired wet thickness of the layer of coating material. Coating material of different colors or shades may be supplied to different portions of the strip surface for producing coatings of varied patterns.
摘要:
Production of a longitudinally striated coating on a strip article by advancing the article past an open side of an otherwise-enclosed trench so that the article surface to be coated closes the open trench side, while delivering concurrent laminar flows of two different liquid coating materials to the trench at least at one locality spaced from the trench open side, to keep the trench completely filled and to deposit a layer of coating material on the moving article surface. Liquid circulation in the trench caused by the motion of the article surface so distributes the two coating materials along the trench that the applied coating layer is constituted of alternating longitudinal striations of the two materials. With delivery of concurrent flows of the two coating materials at each of plural localities spaced along the trench, positional and other variations of the striations can be achieved by varying the relative total flows delivered at different ones of these localities, for example to create a simulated wood-grain pattern.
摘要:
In the coating of a strip article by continuously advancing the article lengthwise past a dam while applying liquid coating material to a major surface of the article ahead of the dam, and advancing the article surface past a facing wall of extended length immediately beyond the dam, the article is restrained against movement away from the wall by an endless surface moving in the same direction and at the same rate as the article. The liquid coating material, in contact with the article major surface ahead of the dam, is fully confined within a reservoir or trench to which the coating material is supplied under positive pressure to maintain the reservoir or trench continuously entirely filled therewith.
摘要:
An array of overlapped, interlocking horizontal siding panels secured to a wall by parallel vertical stringers having vertically spaced resilient clips for holding the top margins of the panels, wherein the panel top margins and stringer clips cooperatively provide a double locking arrangement such that as a panel is mounted on the stringers, it is moved into a first position in which its top margin engages clips of the stringers and then is moved upwardly into a second position in which it simultaneously further engages the clips and interlocks with the next lower panel in the array. To this end, the top margin of each panel has a locking projection above the conventional lip provided for interlocking with the bottom margin of the adjacent higher panel, and each clip has two vertically spaced locking surfaces for successively engaging this locking projection as the panel top margin is pushed upwardly under the clip. In some embodiments, each panel also has a central flange projecting inwardly and upwardly for engagement with retaining tabs formed in the stringers.
摘要:
This composite beam structure is built up from at least two relatively rigid members, which may be of extruded aluminum and at least one relatively flexible web, which may be corrugated sheet aluminum. The web connects the relatively rigid members. The web has relatively short pitch, shallow corrugations in its margins to facilitate its connection to the rigid members, and relatively long pitch, deep corrugations between its margins to provide increased stress resistance. A box beam modification uses two relatively rigid members and two corrugated webs.