Abstract: An image recording apparatus includes a recording head having a plurality of element arrays in a scanning direction, a driving device, a transporting mechanism and a selecting device. Each element array includes a plurality of recording elements arranged with a predetermined spacing in a direction approximately perpendicular to the scanning direction. The driving device drives the recording elements of the recording head. The transporting mechanism moves the recording head relative to the recording medium in the direction perpendicular to the scanning direction. The selecting device selects between a first recording mode for performing the recording operation with high resolution and high precision and a second recording mode for performing the recording operation with high speed. When the first mode is selected, the recording head moves to record additional dot lines formed by the recording elements of each element array between initial dot lines formed by the same.

Abstract: A reference pattern is printed on one of the printing regions as the printing head moves in one direction, and a comparison pattern, which is to become a pattern identical to the reference pattern, is printed on the other of the printing regions as the printing head moves in both directions. A judging process is provided in which the comparison pattern is compared with the reference pattern so as to judge whether the two patterns are identical or not. The relative positional relation is determined to be proper if the two patters have been judged to be identical.

Abstract: Hereby established is a method of disinfection by ozone which is safe, clean, more reliable, and more efficient than prior methods. The method comprises a step of calculating the amount of ozone which would be required to solely disinfect bacteria if there were no co-existing materials, a step of calculating the amount of ozone which will be consumed by actual co-existing materials and a step of applying the total value of the two ozone amounts in proper forms, such as, gas or liquid, etc., preferably in the form of aqueous solution, to the object to be disinfected. This method can be consistently adopted for disinfection on very wide varieties of bacteria.

Abstract: Disclosed is a rubber composition for fluorocarbons and/or refrigerating machine oil use, which comprises at least one of a nitrile group-containing rubber, a chloroprene rubber, and an ethylene propylene rubber as a base and at least one of an epoxy compound selected from the group consisting of a monofunctional epoxy compound, a glycidyl ether type epoxy compound and a glycidyl ether type epoxy compound and a compound represented by formula: ##STR1## wherein R.sup.1 represents a hydrogen atom or an alkyl group, R.sup.2 represents an alkyl group or a phenyl group, R.sup.3 represents an alkyl group, an alkoxy group or an alkenyloxy group, and n is 1 or 2.

Abstract: The shift register 43Y is written with four bits of data for recording dots of yellow color, the shift register 43M is written with four bits of data for recording dots of magenta color, the shift register 43C is written with four bits of data for recording dots of cyan color, and the shift register 43Bk is written with four bits of data for recording dots of black color. The recording head 29 is scanned relative to the recording paper 33 in dot intervals D in a scanning direction. In the recording head 29, the recording units 30Y, 30M, 30C, and 30Bk for recording the four colors are aligned in the scanning direction with an interval P equal to a sum of one dot interval D and a multiple of four dot intervals 4D. With this arrangement, the shift registers 43 are supplied with the four bits of data at timings shifted from one another by an amount corresponding to one recording timing period T.

Abstract: A waveform processing circuit for a pulse generator provided between the pulse generator and a motor control circuit, comprises a frequency dividing circuit and a control signal generation circuit. The frequency dividing circuit outputs, on the basis of an A-phase pulse signal and a B-phase pulse signal outputted from the pulse generator, a pulse signal having a duty ratio of 1:1 and being inverted in response to rise of the A-phase pulse signal and a pulse signal having a duty ratio of 1:1 and being inverted in response to fall of the A-phase pulse. The control signal generation circuit generates, on the basis of these two pulse signals, a traveling amount signal and a direction discrimination signal. Thus, the motor control circuit carries out, on the basis of the traveling amount signal and the direction discrimination signal, motor control without undergoing the influence of a duty ratio of the pulse generated from the pulse generator.

Abstract: A rotary head type tape recording and/or reproducing apparatus comprises a rotary head drum having a rotary head for recording and/or reproducing information signals onto or from a magnetic tape helically wrapped around the rotary head drum with a predetermined wrap angle and an outer peripheral surface of the drum being free of leads for restricting the movement of the wrapped magnetic tape in the width direction; a pair of tape guides having flange portions which are located near both sides of the rotary head drum and restrict the movement of the magnetic tape in the width direction; and a head drum supporting and moving arrangement for fixing the rotary head drum and the pair of tape guides and moving so as to be in contact with or away from a cassette loading arrangement which loads and supports a tape cassette in which the magnetic tape is enclosed.

Abstract: In a printing head, which is employable in a printer, having a predetermined number of printing pins respectively connected to solenoids circularly disposed along a predetermined circle, the solenoids being arranged to be connected to another predetermined number of transistor arrays respectively including third predetermined number of transistor; the improvement in that two solenoids adjacently located with each other along the predetermined circle are respectively connected to separate transistor arrays. Thus, the current flowed through the solenoids can be prevented from undesirably increasing.

Abstract: In a dot printer having a print head, a moving mechanism for laterally reciprocating the print head relative to a recording medium, a driving circuit for driving the print head, a memory for storing basic dot patterns, and a controller for reading a basic dot pattern from the memory that corresponds to input data, a printing pattern is produced by processing the basic dot pattern and controlling the moving mechanism and the driving circuit according to the printing dot pattern to print the data on the recording medium. A reference dot pattern is produced by replicating n vertical lines of the same dot arrangement as that of the dot lines of the basic dot pattern. The controller produces the printing dot pattern by omitting m dots following the head dot of each dot line, and each successive remaining dot, of the reference dot pattern consisting of successive dots.

Abstract: A printer having a device for advancing and retracting a print head toward and away from a paper supporting platen, an automatic head gap adjusting device for controlling the head advancing and retracting device, to advance the print head until the print head comes into contact with a recording paper, and then retracting the print head by a predetermined distance, to thereby adjust a head gap between the paper and the print head, and an operator-controlled head gap adjusting device for manually operating said head advancing and retracting device, to thereby adjust the head gap. A mode selector is provided for selecting one of an automatic adjusting mode in which the head gap is adjusted by the automatic head gap adjusting device, and a manual adjusting mode in which the head gap is adjusted by the operator-controlled head gap adjusting device.

Abstract: A planar antenna comprising a dielectric layer containing a homopolymer of 3-methylbutene-1 or a copolymer of 3-methylbutene-1 and an alpha-olefin of from 2 to 12 carbon atoms, a polyene or a mixture thereof, a conductor laminated on the whole back surface of said dielectric layer and a circularly polarized radiation microstrip element formed from a metal foil and provided on the other surface of said dielectric layer.

Abstract: The body of a cassette tape recording and/or reproducing apparatus in which a cassette is mounted and a tape therein is driven for recording and/or reproducing, comprises a primary portion and a secondary portion slidably combined with the former, and an openable and closable cover which covers the cassette mounted in the body is also slidable with the secondary portion of the body. When the apparatus is out of use, the widths of the body and cover are decreased to smaller widths than those necessitated for mounting the cassette, and that the cover is prevented from opening, and only when the apparatus is in use, the widths of the body and cover are increased to minimal widths necessitated for mounting the cassette and that the cover is openable and closable.

Abstract: In a process for polymerizing an olefin in the presence of a catalyst system combining an organoaluminum compound with a hydrocarbon insoluble solid catalytic component prepared by treating a hydrocarbon solution containing a magnesium compound, and a titanium compound with an aluminum halide having the formulaAlR.sub.l.sup.1 X.sub.3-l.sup.1(R.sup.1 represents an alkyl, aryl or cycloalkyl group and X.sup.1 represents a halogen atom, and l is 1.ltoreq.l.ltoreq.2),an improvement characterized in that the magnesium compound is a compound having the formulaMg(OR.sup.2).sub.m X.sub.2-m.sup.2(R.sup.2 represents an alkyl, aryl or cycloalkyl group; X.sup.2 represents a halogen atom; and m is 1 or 2) and the titanium compound is a compound having the formulaTi(OR.sup.3).sub.n X.sub.4-n.sup.3(R.sup.3 represents an alkyl, aryl or cycloalkyl group; X.sup.3 represents a halogen atom; n is 1, 2 or 3).

Abstract: A polyolefin is producing by polymerizing ethylene or copolymerizing ethylene and the other .alpha.-olefin at 50.degree. to 100.degree. C. in a hydrocarbon solvent in the presence of a catalyst system of an organoaluminum compound and a transition metal compound component which is a solid catalytic component containing a magnesium compound and a titanium compound under the condition (a) two step polymerizations of a first polymerization step and a second polymerization step in the presence of a reaction mixture obtained by said first polymerization step; (b) a polymerization in the presence of hydrogen at a molar ratio of H.sub.2 to C.sub.2 H.sub.4 (vapor phase) of 0.01-0.8 to produce a polymer A having a viscosity average molecular weight of 2.times.10.sup.5 -7.times.10.sup.5 at a ratio of 30 to 70 wt. % based on the total polymer in one of said first or second polymerization step and a polymerization in the presence of hydrogen at a molar ratio of H.sub.2 to C.sub.2 H.sub.4 (vapor phase) of 1.

Abstract: A solid catalytic component for polymerization of an olefin is prepared by reacting a vanadium trichloride ether complex with aluminum halide.

Abstract: A solid catalytic complex for the polymerization of an olefin has the formula:[MgM.sub.1-n ]X.sub.m . xYwherein M represents a transition metal selected from the group consisting of titanium and vanadium; X represents a halogen atom; Y represents an aliphatic ether or a cyclic ether; n is 0.01 - 0.99; 2<m<4; and 1<x<3.