Abstract: An apparatus for and a method of remote controlling an operation of a vibration roller, capable of achieving the operation of vibration roller under a condition that no operator have a ride in the vibration roller. The apparatus includes a wireless transmitting unit, a wireless receiving unit, a control unit for controlling functional parts required for the operation of vibration roller, an operation switch unit, a forward/rearward running manipulating unit, a steering unit and an acceleration and stop manipulating unit.

Abstract: A device for driving an idler of a deck mechanism of a video cassette recorder. This device comprises a tape supply reel and a tape take-up reel, both reels being rotatably mounted on a base plate of the deck mechanism and rotated by a rotational force of a capstan motor, a function plate linearly reciprocating by a rotational force of a loading motor, a gear pulley applied with the rotational force of the capstan shaft through a belt, a transmission gear assembly driving the idler by the rotational force of the gear pulley to rotate either of the tape supply reel or the tape take-up reel, and a turning member rotating, in cooperation with the function member, the second transmission gears to cause the idler to gear into either of the tape supply reel and the tape take-up reel prior to transmission of the rotational force of the capstan shaft to the reel gearing into the idler.

Abstract: A method for fabricating a magnetic head includes steps of stacking a magnetic layer on a ceramic substrate, coating an adhesive over the magnetic layer while rotating the substrate in a predetermined speed, forming a substrate block by stacking a plurality of substrates, and forming at least one pair of magnetic ferrite blocks by vertically and longitudinally slicing the substrate block. The adhesive is consistently coated on a gap formation plane of the magnetic ferrite block while being rotated by a predetermined speed, the pair of ferrite blocks are pressed to be bonded to each other, thereby completing the magnetic head.

Abstract: A method for the production of polyester suitable to be molded into a film with excellent surface properties.The method comprises passing dispersion-in-water type silica sol with pH 8 to 11 including sodium oxide as a stabilizer and silica particles with average diameters 0.01 to 0.3 .mu.m through a column of cation exchange resin having the following formula 1 and the strong basic anion exchange having the following formula 2, in sequence to adjust the pH value to 2 to 4, adding an hydrogen bonding agent and ethylene glycol thereto, heating the resultant silica sol under a reduced pressure to remove water, so as to obtain dispersion-in-ethylene glycol type silica sol, and adding 0.01 to 5% by weight of the dispersion-in-ethylene glycol type silica sol, as based on the weight of polyester to be produced, at any step during the ester interchange reaction.

Abstract: A method and apparatus for producing a manganese-zinc ferrite single crystal using a local liquid pool formation which involves melting of a starting material in a crucible and lowering of the temperature of crucible to make the resultant melt maintain form three phase regions of an upper liquid pool region, an intermediate semi-rigid region and a lower solid region. A pair of heaters are disposed at the upper and side wall portions of crucible and controlled differently from each other so that the formed lower solid region extends at its peripheral portion throughout the inner surface of the side wall portion of the crucible, thereby minimizing the contact of the formed upper liquid pool region with the whole inner surface of the crucible.

Abstract: The present invention relates to water-soluble copolymerized polyester resin suitable to produce a polyester film having a good adhesion and surface properties.That is, the composition of the present invention comprise 50.about.85 mol % of aromatic dicarbonic acid, 0.5.about.25 mol % of aromatic dicarbonic acid containing sulfonic acid alkali metallic base and 0.5.about.25 mol % of dicarbonic acid containing silane system represented by the following formula (I) in the total dicorbonic acid components, wherein the glycol components contained in the composition comprising more than 60 mol % of aliphatic or alicyclic glycol and 1.about.40 mol % of diethylene glycol or triethylene glycol. ##STR1## wherein R.sub.1 is aliphatic hydrocarbon group of 1 to 15 carbon atoms, R.sub.2 is aliphatic hydrocarbon group of 1 to 4 carbon atoms.

Abstract: A method of preparing a triterpenoids from Ilex pubescens which includes extracting the Ilex pubescens roots with organic solvent to an initial extract and converting the initial extract to the triterpenoids exhibiting antithrombotic activity on humans or mammals. Also, a pharmaceutical composition containing an effective antithrombotic amount of the triterpenoids from the Ilex pubescens.