Canon Kabushiki Kaisha

Fuji Electric Co., Ltd.

Nippon Mitsubishi Oil Corporation

Tokuriki Honten Co., Ltd.

Hajime Yoshida

Makoto Kashimura

Toshiyuki Onishi

Masafumi Wataya

Yuichi Hirai

Shinya Matsui

Yasuhiro Unosawa

Yoshiaki Kaburagi

Shigemitsu Tasaki

Hisashi Morioka

Shigeo Takenaka

Nobuaki Iwakami

Makoto Takemura

Shinji Kanemitsu

Tetsuhiro Nitta

Hiroshi Yoshino

Takashi Nara

Hisaji Shinohara

Takaya Matsumoto

Masaru Satou

Hironobu Yamamoto

Ryoji Ozaki

Shinji Nishikawa

A correction method for determining a correction amount for correcting a printing position shift based on ink discharge velocity in a printer. The printer prints a plurality of identical adjustment patterns while changing the printhead scanning speed by a predetermined amount. The plurality of printed patterns are visually compared, a pattern with the highest quality is selected, and the selection result is designated to the printer through a host. In accordance with the designation, the printer stores a velocity of discharging an ink from the printhead, which is necessary for printing the selected pattern, in a non-volatile memory (NVRAM). After this, the correction amount for correcting the printing position shift is calculated on the basis of the stored ink discharge velocity, and printing is performed while correcting the printing potion shift using the correction amount.

Correcting variations in ink discharge velocity in a printer by printing a test pattern and adjusting a printing position shift

A method of preparing an alkenyl-substituted aromatic hydrocarbon, which comprises alkenylating an aromatic hydrocarbon with an olefin using &bgr;-diketone together with a rhodium complex catalyst in the presence of oxygen.

Method of preparing alkenyl-substituted aromatic hydrocarbon

A printing apparatus and a printing method perform the steps of computing the shift value of each ejection port in accordance with the thermally-expanded width of a print head, dividing the shift value by a nozzle pitch, using the ejection port which number is minimum among ejection ports having the same integer value of the above quotient as a boundary position, using the print data printed at the boundary position as the logical sum between data for two consecutive ejection ports, and printing each of print data values for ejection ports having the same quotient integer value as the boundary position as the print data for an ejection port number obtained by adding the quotient integer value to the ejection port number of its own.

Printing apparatus and printing method

Ink jet recording encounters deviations in the position at which a recorded dot is applied due to changes in the distance from the recording head to a recording medium, the carriage movement speed and the ink discharge speed or the like. When bidirectional recording is performed while moving the carriage having the recording head mounted thereon, deviations of the recorded dot may occur in the forward and rearward recording operations. The present invention is arranged in such a manner that values for correcting the deviations occurring in bidirectional recording and corresponding to the changes of the distance from the recording head to a recording medium, the carriage movement speed and the ink discharge speed or the like are previously stored. A drive signal, the timing of which has been corrected with the correction value, is used to operate the apparatus so that high-quality recordings free from deviations occurring in the bidirectional recording operation are obtained. The present invention disclosed a recording apparatus having a plurality of recording heads mounted on a carriage thereof, the recording apparatus being arranged in such a manner that the carriage movement speed is detected to determine the recording timing of the plural recording heads to prevent the deviation of dots formed by the plural recording heads due to the changes in the moving speed caused by changes in the environment of the apparatus to record high quality images.

Method and apparatus for recording information with corrected drive

In a recording apparatus employing a magnetic linear encoder that includes a magnetized scale and a magnetic head movable along the scale, in order to enable efficient mounting of the scale on the recording apparatus and to enable tension adjustment of the scale, support members are provided for detachably supporting the scale, as is a device for providing tension during the mounting of the scale on side plates of the recording apparatus. Also, the magnetized portion of the scale is positioned behind the carriage. Further, the magnetic head is provided with dust shield members which are in contact with, but rendered slidable with respect to, the scale.

Recording apparatus provided with a magnetic encoder for a scanning

A recording apparatus, which is provided with a carriage supporting a recording head or reciprocating along a platen, includes a magnetized scale of a magnetic linear encoder positioned along a moving direction of the carriage, and a magnetic head of the magnetic linear encoder, mounted on the carriage and adapted for reading the magnetized pattern of the scale. The scale is provided with at least two magnetized lines of mutually different pitches of magnetization, for recording position information relating to the recording operation, and position information relating to other functions.

Recording apparatus with magnetic linear encoder

This invention relates to a silver/metal oxide material for electrical contacts containing no Cd which essentially consists of Ag and 5 to 30% by weight of at least one of oxides of Sb, Sn, Zn, In, Cu, Mn, Bi and Pb, and further, if necessary, 0.05 to 2% by weight of at least one of oxides of Mg, Al, Fe, Ni, Co, Si, Ga, Ge, Te, Ca and Li, the total amount of said metal oxides being 5 to 32% by weight, wherein fine particles of said metal oxides are substantially uniformly distributed in a matrix whose main component is Ag in a sintered state, and wherein there are no grain boundaries formed by agglomerations or agglomerated layers of said metal oxides. Further, the method of producing the same is provided including steps of: changing in steps the hydrogen ion concentration in an aqueous solution of Ag ions and at least one of metal ions of Sb, Sn, Zn, In, Cu, Mn, Bi and Pb, and further, if necessary, at least one of metal ions of Mg, Al, Fe, Ni, Co, Si, Ga, Ge, Te, Ca and Li so as to form precipitates of Ag-oxygen compound and oxides and/or hydroxides of said metals; drying and thereafter heat-treating said precipitates to form mixed powder of Ag and oxides of said metals and shaping and sintering said mixed powder; and further, if necessary, heat-treating the sintered material to stabilize.

Silver/metal oxide material for electrical contacts and method of

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Yokohama, Japan

Hajime Yoshida