摘要:
A glass substrate is for use in a magnetic disk. The glass substrate is formed by using a plate-like glass produced by a float method and having a pair of main surfaces. One surface of the main surfaces, which is formed with a tin layer when producing the plate-like glass by the float method, is caused to serve as a surface not for use in magnetic recording and the other surface formed with no tin layer is caused to serve as a surface for use in magnetic recording.
摘要:
A magnetic disk substrate manufacturing method of this invention includes a main surface polishing process that polishes disk-shaped glass substrates by the use of a polishing machine having a carrier pressed between a pair of polishing surface plates and adapted to make an orbital motion while rotating on its axis in a state of holding the disk-shaped glass substrates. In the polishing machine, the carrier is placed in a state where a plate-like member is disposed on one side of main surfaces of the disk-shaped glass substrate, so that only the other side of the main surfaces of the disk-shaped glass substrate is polished while allowing the one side of the main surfaces of the disk-shaped glass substrates to be a non-polishing main surface.
摘要:
In a magnetic disk substrate having first and second chamfered faces respectively connecting between first and second main surfaces opposite to each other and an edge face located between the first and second main surfaces, the ranges of the first and second chamfered faces are specified. Specifically, the distance a from a first boundary portion being a boundary between the first main surface and the first chamfered face to a point of intersection between the first main surface and an extended line of the edge face and the distance b from a second boundary portion being a boundary between the second main surface and the second chamfered face to a point of intersection between the second main surface and an extended line of the edge face are set to satisfy a/b≧1.6.
摘要:
A method for manufacturing a glass substrate for a magnetic disk comprises a surface grinding step of processing a mirror-surface plate glass, having a main surface in the form of a mirror surface, to a required flatness and surface roughness using fixed abrasive particles. The method comprises, before the surface grinding step using the fixed abrasive particles, a surface roughening step of roughening the surface of the mirror-surface plate glass by frosting.
摘要:
A solute and a solvent with close boiling points or close polarities are separated and concentrated by vaporizing at least one of the solvent and solute, and selectively adsorbing the vaporized component in an apparatus having a vessel, and an absorbent with an opening into the vessel.
摘要:
A ceramic glow plug (A) is constituted by a metallic sheath (1); a cylindrical main metallic shell (2) having a holding part (21) which holds a rear part (11); an ceramic heating element (3) fitted into the metallic sheath (1) and obtained by connecting one-side ends (331, 341) of lead-out wires (33, 34) respectively to the ends (321, 322) of a heating resistor (32) to obtain a heater main body, embedding the heater main body in a ceramic powder, and hot-pressing and sintering the powder; a terminal electrode (4) inserted into the cylindrical main metallic shell (2) on its rear end side and insulated therefrom; and lead coils (51, 52) connected to the lead-out wires (33, 34) in such a manner that one-side ends of the coils (51, 52) are brazed respectively to those areas of the lead-out wires (33, 34) which are exposed on the bake surface with a high-purity silver-based brazing material and the other ends thereof are electrically connected respectively to the cylindrical main metallic shell (2) and the terminal electrode (4).
摘要:
A backrest mechanism for a stand-up rider operator's platform in an industrial vehicle, in which an operator operates the vehicle while standing, has a support portion and a support holder. The support portion has a backrest portion for supporting a back of the operator and a seat portion for at least supporting buttocks of the operator. The support portion supports the operator by either of the backrest portion and the seat portion. The support holder is located on a rear side of the vehicle from the operator's platform. The support holder holds the support portion so that the support portion is detachable from the support holder.
摘要:
A drawbar device for a tow vehicle having a vehicle body and a hood operable to open and close for covering a top surface of a rear portion of the vehicle body includes a drawbar bracket, a drawbar pin, an operation lever and a link mechanism. The drawbar bracket is provided on the vehicle body. The drawbar pin is provided at the drawbar bracket so as to be movable upward and downward. The operation lever is provided on the hood so as to be manually operated. The link mechanism is operable to move the drawbar pin upward according to operation of the operation lever.
摘要:
A circuit 202 for executing range shift-up/-down of pass metric values is provided as an additional circuit preceding to an ACS circuit 203 for adding and comparing branch metric computation values and preceding pass metric values and selecting the highest likelihood pass. It is thus possible to permit effective use of RAM bits by executing range shift-up and the accuracy of the effective bits of input data when it is necessary to expand the effective bits of the pass metric values, while executing range shift-down and increasing the accuracy of the input data when the effective bits of the pass metric values are not fully used.
摘要:
A backrest mechanism for a stand-up rider operator's platform in an industrial vehicle, in which an operator operates the vehicle while standing, has a support portion and a support holder. The support portion has a backrest portion for supporting a back of the operator and a seat portion for at least supporting buttocks of the operator. The support portion supports the operator by either of the backrest portion and the seat portion. The support holder is located on a rear side of the vehicle from the operator's platform. The support holder holds the support portion so that the support portion is detachable from the support holder.