摘要:
A method for leveling a metal strip performs a leveling operation by opening leveling rolls at a predetermined position relative to a welded joint and closing at a predetermined position relative to the welded joint. The tension exerted on the metal strip while the leveling rolls are held open is set at a given value in relation to the metal strip length where the leveling rolls are held open. The tension to be exerted on the metal strip while leveling is selected so that the tension may cause a given rate of elongation on the metal strip and thereby levels the metal strip. The leveling device is applicable for implementing the leveling process including a quick open and a quick close upon encountering welded joints of the strips. The leveling device includes features in that the leveling rolls as held open and thus released from the metal strip and self-propelled to rotate.
摘要:
An annealing operation is performed with controlling tension force to be exerted on a metal strip depending upon thermal crown of hearth rolls. The thermal crown magnitude is assumed based on various factors influencing for the magnitude of the effective crown.
摘要:
A process for preventing transverse displacement of metal strip comprises correcting a shape of metal strip into flat form prior to the travel of the metal strip into a continuous annealing furnace when continuously annealing the metal strip in the furnace under a condition of LSD.gtoreq.100 (representing a product of line speed and strip gauge).
摘要:
An improved layout of the hearth rolls in an annealing furnace comprises a plurality of ceramic coated rolls and a plated rolls. The ceramic coated rolls are arranged in a region in the annealing furnace, where the temperature is higher than 450.degree. C. On the other hand, the plated rolls are arranged in a region where the temperature is lower than or equal to 450.degree. C. The hearth roll is provided a wear resistant coating of chrome plate or sprayed on ceramic of a thickness greater than or equal to 1 .mu.m and less than or equal to 100 .mu.m. In addition, according to the invention, the hearth roll is provided a surface roughness Ra in the range of 4.5 .mu.m to 20 .mu.m.
摘要:
An apparatus for plating a metal strip in an electrolytic cell is provided with a supporting roll. The support roll is disposed apart from the deflector rolls by a predetermined distance and supports the metal strip in such a way that the catenary of the metal strip can be reduced. The distance is determined so that the catenary is 0.04 or less times of the distance between upper and lower electrodes in the electrolytic cell. When the metal strip is a steel plate having a density of 7.85.times.10.sup.-6 (kg/mm.sup.3), the predetermined distance l (mm) between the axis of the deflector roll and that of the supporting roll is subject to the following formula: ##EQU1## in which the distance between the upper and lower electrodes is .DELTA.D (mm), the thickness of the metal strip being t (mm), the width thereof being W (mm) and the tension applied to the metal strip being T (kg).
摘要:
A stainless steel foil contains, in percent by mass, 0.05% or less of C, 2.0% or less of Si, 1.0% or less of Mn, 0.003% or less of S, 0.05% or less of P, 25.0% to 35.0% of Cr, 0.05% to 0.30% of Ni, 3.0% to 10.0% of Al, 0.10% or less of N, 0.02% or less of Ti, 0.02% or less of Nb, 0.02% or less of Ta, 0.005% to 0.20% of Zr, 0.02% or less of Ce, 0.03% to 0.20% of REM excluding Ce, 0.5% to 6.0% in total of at least one of Mo and W, and the balance being Fe and incidental impurities.
摘要:
A photo-addressable display medium is provided, the photo-addressable display medium including: a pair of electrodes having transparency; a photoconductive layer disposed between the pair of electrodes and having a laminated structure of a first charge generation layer, a charge transport layer and a second charge generation layer in this order from an exposing light irradiation side; and a liquid crystal layer disposed between an electrode of the inverse side to the exposing light irradiation side and the second charge generation layer and having memory performance, wherein the first charge generation layer and the second charge generation layer contain a phthalocyanine compound, and the charge transport layer contains a stilbene compound represented by the following formula (1): wherein, R1 to R4 each independently represents a hydrogen atom, a methyl group or an ethyl group.
摘要:
An optically writable display medium includes an optical switching element and a display element. The optical switching element includes a charge transport layer sandwiched between an upper charge generating layer and a lower charge generating layer. The display element includes a display layer having memory properties and is provided on the optical switching element. The absorption wavelength region of the upper charge generating layer and the absorption wavelength region of the lower charge generating layer are substantially different from each other.
摘要:
Sequentially performed are (1) an entire liquid crystal layer is initialized into a focal conic state, (2) an image is written onto the liquid crystal device by scanning with selecting exposure or non-exposure while applying a voltage that does not exceed a threshold value for a state change from the focal conic state to a homeotropic state during the non-exposure but exceeds the threshold value during the exposure and that causes the focal conic state and the homeotropic state to be bi-stable after the exposure, and (3) the application of the voltage is stopped to change a state of a portion, of which the state has changed to the homeotropic state, to the planer state. In (2), an electric field energy applied to an exposure portion of the liquid crystal layer is controlled to gradually increase from a start to an end of the series of scanning actions.
摘要:
An indwelling needle includes a cylindrical main body to be fixed to a fitted body, a cylindrical hub for holding a needle, and a cylindrical protective cover which surround the needle and is provided slidably along the needle. In the usage state, the hub and the needle are advanced to the tip end side with respect to the main body and the protective cover is retreated to the rear end side with respect to the main body to project a cutting edge of the needle. In the housed state, the hub is retreated to the rear end side with respect to the main body, and the protective cover is advanced to the tip end side and the cutting edge of the needle is housed within the protective cover. Erroneous sticking into medical staff is prevented, and the burden on a patient is reduced.