摘要:
A magnetic recording medium is disclosed which has a magnetic layer comprising a ferromagnetic powder and a specific polyurethane resin as a binder. The polyurethane resin has a weight average molecular weight of not more than 30,000, a glass transition point of not higher than 0.degree. C. and a -SO.sub.3 M group, wherein M is a hydrogen atom or an alkali metal atom, in an amount of not less than 0.35% by weight in terms of sulfur atom. The recording medium is excellent in the dispersibility of the magnetic powder in the binder and has high running stability.
摘要:
Process for preparing 2-alkyl-5-haloacetylbenzenesulfonamide represented by the general formula (1), ##STR1## (wherein R.sup.1 is an alkyl group having 1 to 5 carbon atoms; and X is a chlorine atom, bromine atom or iodine atom), characterized by halogenating a 5-acetyl-2-alkylbenzenesulfonamide represented by the general formula (2), ##STR2## (wherein R.sup.1 is the same as defined above) in a lower alcohol represented by the general formula (3),R.sup.4 --OH(wherein R.sup.4 is an alkyl group having 1 to 5 carbon atoms).
摘要:
In a device for picking up tubular workpieces sequentially from a stack, and supplying the same to a subsequent stage, at least one truck is provided so as to be reciprocable between a loading position and an unloading position. In the loading position, the tubular workpieces are stacked up on the truck in an orderly manner into a number of layers, each layer including a plurality of rows each including a number of axially aligned tubular workpieces. A workpiece carrying bar reciprocable between an advanced position passing through the inner bores of a row of the tubular workpieces and a retracting position freeing the row, device for shifting the workpiece carrying bar horizontally and vertically, and devices for controlling the operation of the aforementioned devices are further provided.
摘要:
A packaging bag having a steam venting function capable of releasing pressure inside a package even when heating cooking is performed by a microwave oven and preventing the inside of the bag from being contaminated and the package using the packaging bag. The packaging bag 1 comprises two pieces of front and back main body films 2 and 3 having sealant layers 2s and 3s which are opposed to each other with the sealant layers facing inward, side seal parts 5, and a bottom seal part 4. The front body film 2 is folded in the vicinity of the bottom seal part 4 throughout the entire width of the bag and parallel with the bottom seal part to form a fold-in part 8. A steam venting port 11 is formed in the fold-in part 8, and an easily peelable tape 12 covering the steam venting port 11 is disposed on the inside of the fold-in part 8 throughout the width of the bag and parallel with the fold-in part8, and then heat-sealed.
摘要:
A lid member for a food container having a layered structure in which a surface sheet is laid on a composite sheet, said surface sheet including an easily-peelable area that is easily separated from the composite sheet, formed by applying a lubricant between the surface sheet and the composite sheet, said surface sheet including a non-peelable area adjacent to said easily-peelable area; a first slit cut vertical-sectionally through the composite sheet, said first slit defining one or more apertures in said lid to form an opening area in said composite sheet; a second slit in said surface sheet defining a boundary between the easily-peelable area and said non-peelable area of said surface sheet; and said surface sheet being adhered to said composite sheet at said composite sheet opening area over an area that is smaller than said composite sheet opening area.
摘要:
A linear driving device of compact size capable of fundamentally canceling a reactive force produced in acceleration and deceleration of a slider within the linear driving device. A slider and a stator constitute a linear motor. The stator is supported to move linearly on the base by an air bearing and the slider is supported to move linearly on the stator. When the slider is driven by the stator to move in one axial direction, a reactive force is exerted on the stator in an opposite axial direction to move the stator in the opposite direction, so that substantially no force is transmitted from the stator to the base. A ratio of weights of the stator and the slider is lopsided so that motion strokes of these members are different. Since the reactive force produced in acceleration and deceleration is canceled within the linear driving device and is not transmitted to the base, any undesirable effect is caused outside of the linear driving device. This device can be applied to a machining tool or a measuring device to realize a high-speed and high-precision machining or measurement.
摘要:
A pneumatic bearing motor with a pneumatic bearing capable of being downsized without lowering the mechanical rigidity thereof. A stator of the pneumatic bearing motor comprises a slot-less stator core and winding which is formed by winding a wire on the stator core into a toroidal shape in a maimer of regular winding. Since the stator does not have projections as exist in conventional stators, it is not necessary to form counterbores in a housing and make wall thickness of the housing large for bearing stress concentration caused by the counterbores. Thus, it is possible to reduce the wall thickness of the housing of the motor and downsize the motor.
摘要:
A stator structure for a motor of high precision by suppressing influence of electromagnetic noise between windings and a distribution pattern layer in a printed board. A shield is provided between the windings and the distribution pattern layer of the printed board to shield the electromagnetic noise and suppress the influence of the electromagnetic noise to thereby enable precise control of the motor. A multilayered printed board is arranged on an axial end face of the stator core and the windings are formed around the stator core and the multilayered printed board to enfold them toroidally in a regular winding manner. The multilayered printed board comprises a distribution pattern layer for connection with the windings and a shield layer for shielding electromagnetism between the distribution pattern layer and the windings.
摘要:
There is disclosed the method of preparing a magnetic recording medium having an improved running durability and the excellent electromagnetic conversion characteristics, wherein the magnetic paint for a magnetic layer is prepared by the steps of:kneading the ferromagnetic powder of 100 parts by weight, the first binder of 3 to 15 parts by weight, and a solvent of 10 to 60 parts by weight under a load of a power consumption of 0.05 to 0.5 KW per kg of the ferromagnetic powder to prepare a mixture thereof;kneading the second binder and the mixture under the load of the same power consumption to prepare a coating solution.
摘要:
A video display device drives LEDs to emit light by light source driving circuits, detects maximum signal levels for the respective colors from video signals for an amount of n screens (n is an integer equal to or larger than one), and calculates amplification factors for the respective colors based on the detected maximum signal levels. In addition, the video display device amplifies the signal levels of the video signals based on the amplification factors for the respective colors calculated in a power saving mode for reducing power consumption, and controls drive current values of the LEDs to be respectively supplied to the light source driving circuits so as to cancel amplification amounts of brightnesses of the LEDs that correspond to amplification amounts of the signal levels of the video signals amplified.