Other

Kabushiki Kaisha Komatsu Seisakusho

Hiroyuki Ando

Naoya Torii

Kazue Sako

Hiroshi Miyauchi

Yasutsugu Kuroda

Seiichi Domyo

Hiroyoshi Tsuchiya

Masashi Yamazaki

Seiko Kanno

Haruhiko Umeda

Masaru Uenoyama

Kotoshige Ishizuki

Isamu Matsumoto

Ichirou Morita

Nobuki Hasegawa

Hideo Hara

Noboru Yamada

Akira Yamamoto

Satoshi Ogawa

Koichi Oka

Masaya Katoh

Yoshihiro Ishihara

Hiroyuki Osumi

Katsuhiko Haga

Naotaka Endo

Hidehiro Takeuchi

Ichir{overscore (o)}u M{overscore (o)}rita

An inkjet printing paper of noncoated type, in which the feathering is prevented and the conveyability is improved. This inkjet printing paper comprises calcium carbonate as its filler wherein the filler contains ash of 10 to 30 weight % as defined in JIS P 8128 and wherein the paper has Stockigt sizing degree of 0.001 to 0.05 sec/g/m according to JIS P 8122. Further, in this paper, X-ray image obtained from area-analysis with an energy-distributed X-ray microanalyzer for the surface of the inkjet printing paper, the area of white part, which indicates the presence of calcium, is 3 to 40% related to the total area of the X-ray image.

Inkjet printing paper

A key recovery condition encryption apparatus includes a hashing unit, a first concatenating unit, and a condition information encryption unit. The hashing unit calculates a hash value on the basis of a hash function using a key recovery information text serving as information necessary for performing key recovery. The first concatenating unit concatenates the hash value from the hashing unit to the key recovery condition. The condition information encryption unit encrypts a concatenating result from the first concatenating unit by using a first encryption key. Also is disclosed a key recovery condition decryption apparatus for decrypting the encrypted data from the above encryption apparatus.

Key recovery condition encryption and decryption apparatuses

The present invention has an object to overcome problems of a key recovery system using a conventional KRF system and to achieve efficient operation of the overall key recovery system. A key recovery system of the present invention includes check units,for checking whether a user has a recovery authorization for a common key KS, on the basis of a recovery condition RC specified by a recovery condition index RCI which is added to an encrypted message (encrypted message obtained by encrypting the common key KS with a public key KRCpub) supplied from a terminal (,to,) of the user concerned, and a key recovery control unit,which is provided separately from the check units,and decrypts the encrypted message with a private key KRCpri paired with the public key KRCpub to recover the common key. The check unit,supplies the common key KS recovered in the key recovery control unit,to the user concerned only when the user has the recovery authorization.

Key recovery system and key recovery method

An upset forging die device and method are provided for upset-forging a raw material that is being filled in a cavity of a lower molding die at a portion between an upper punch of an upper molding die provided on a slide and a lower punch of the lower molding die provided on a bolster. The upper and lower punches are provided with an upper pin and a lower pin respectively so that a first end of each pin is protruded and withdrawn from each of end surfaces of the upper and lower punches and the pins are vertically movable in the upper and lower punches respectively, while a second end of the upper and lower pins is applied with a back-pressure. The back-pressure is applied to each of the upper and lower pins by causing a hydraulic oil supply to supply hydraulic oil to hydraulic cylinders at a time of a molding operation, and the respective back-pressures are removed by switching a solenoid valve to take a communicating position to discharge the hydraulic oil to an oil tank just before the cavity is completely filled up with the raw material.

Forging die and upset forging method

A key recovery information distribution device is provided between a recoverer device and a key recovery device, recovers a data key for the recoverer device, and reduces the load of the recoverer device. Data is encrypted using the data key and stored with key recovery information. The recoverer device which decrypts the encrypted data distributes the key recovery information to key recovery devices through the key recovery information distribution device to recover key information. A recoverer is authenticated directly between the key recovery device and the recoverer device, and then the key information is transmitted to the recoverer device, and the recoverer device recovers the data key.

Key recovery system

Four-wheel traveling system for tipper

A method of manufacturing a scroll member for use in a rotary compressor has the steps of heating a material which has been preformed into a substantially frusta-conical body consisting of a flat upper surface portion provided with a cylindrical projection integrally formed in the center portion thereof and a lower surface portion having a conical surface and a flat projecting surface, and forging the material by a forging apparatus. The heating step compriss a first heating at a temperature in the range from 100.degree. to 200.degree. C. and a second heating at a temperature of 440.degree. C. which is carried out after coating the material with graphite, the coating being applied to the material between the first and the second heatings.

Method of manufacturing scroll members for use in a rotary compressor

An apparatus for manufacturing fittings in one press stroke comprising a bed, a lower die mounted on the bed, the lower die having formed therein a stepped bore adapted to receive a blank to be worked, a hollow knockout slidable in the stepped bore, a slide, a holder fixedly secured to the slide, a cylindrical member slidably fitted in the holder, an upper die mounted in the cylindrical member and having a bore formed therein, a punch fixedly secured to the slide and inserted in the bore of the upper die, a sleeve mounted on and around the punch, a cushion cylinder for biasing the upper die downwards, and an elastomer disposed around the sleeve between the holder and the upper die for biasing the latter downwards after the upper die is lowered on the lower die.

Apparatus for manufacturing fittings

An apparatus for coupling a tractor, a dump trailer and a dump truck wherein the dump trailer is adapted to be selectively towed by the tractor or by the dump truck. A draw bar having a trunnion and a hole at the leading end portion is pivotally mounted on the dump trailer. The trunnion is adapted to be engaged with a gripper mounted on an arm member of the tractor so as to enable the dump trailer to be towed by the tractor. The hole of the draw bar is adapted to be engageable with a coupler pivotally mounted on a rear axle of the dump truck thereby allowing the dump trailer to be drawn by the dump truck.

Apparatus for coupling a tractor, a dump trailer and a dump truck

A suspension for a front axle of a trailer comprising a trailer frame, an outer cylindrical member fixedly secured to the trailer frame, a bracket mounted on the front axle, a shaft mounted on the bracket and arranged at right angles to the front axle, a sleeve rotatably mounted on the shaft, an inner cylindrical member fixedly secured to the sleeve and adapted to slide within the outer cylindrical member, a first spring retainer pivotally mounted on the outer cylindrical member, a second spring retainer pivotally mounted on the sleeve, and a spring disposed between the first and second spring retainers.

Suspension for a front axle of a trailer

Growing community of inventors

Kawasaki, Japan

Hiroyuki Ando