Patents Assigned to Rengo Co., Ltd.
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Patent number: 5439866Abstract: A novel silver-containing tobermorite usable in place of silver-, copper- or zing-incorporating zeolites and having ethylene-adsorbing ability and antibacterial properties. Stated more particularly, a silver-containing tobermorite having a composition of [Ca.sub.5-Y/2 Ag.sub.Y+Z M.sub.x-z (Si.sub.6-x Al.sub.x O.sub.18 H.sub.2).4H.sub.2 O, 0.ltoreq.X.ltoreq.1, 0.001.ltoreq.Y.ltoreq.2, 0.ltoreq.Z.ltoreq.0.1, M is a monovalent cation] and prepared from a tobermorite [Ca.sub.5 M.sub.x (Si.sub.6-x Al.sub.x O.sub.18 H.sub.2).4H.sub.2 O, 0.ltoreq.X.ltoreq.1, M is as defined above] by exchanging Ca.sup.2+, or Ca.sup.2+ and a monovalent cation which are interlayer ions of the tobermorite for silver ion. The silver-containing tobermorite is excellent in heat resistance, water resistance and mechanical strength, and also outstanding in ethylene-adsorbing ability and antibacterial properties.Type: GrantFiled: November 1, 1993Date of Patent: August 8, 1995Assignee: Rengo Co., Ltd.Inventors: Naokazu Sakoda, Kouju Sugiyama
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Patent number: 5050852Abstract: A blank feeder for feeding blanks. It has a feed table on which a plurality of blanks are stacked, a suction unit provided under the table to suck the lowermost one of the stack downward, a motor-driven first feed rolls mounted in the suction unit and adapted to feed the lowermost blank in contact therewith, and second feed rolls located downstream of the first feed rolls and adapted to be driven at a constant speed. The first feed rolls are accelerated from zero speed to the speed of the second feed rolls before the front end of the blank reaches the second rolls, then driven synchronized with the second feed rolls, and decelerated to zero speed again by the time the next cycle begins. A kicker for pushing out the blank may be provided. The kicker is moved forward so as to be synchronized with the second feed rolls before the front end of the blank reaches the second feed rolls. Once synchronized, this state is maintained until the rear end of the blank gets off from the kicker.Type: GrantFiled: August 17, 1990Date of Patent: September 24, 1991Assignee: Rengo Co. Ltd.Inventors: Tetsuya Sawada, Hidetoshi Hoshiyama, Ikuo Yoshimoto, Shinichi Sogo
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Patent number: 4906679Abstract: A process for production of corrugated board using an aqueous adhesive which contains polyvinyl alcohol and clay, or polyvinyl alcohol, clay and water-soluble boron compound, the ratio of clay to polyvinyl alcohol being in the range of 200 to 600 parts by weight based on 100 parts by weight of polyvinyl alcohol, the ratio of water-soluble boron compound being not more than 15 parts by weight based on 100 parts by weight of polyvinyl alcohol, the solid content of the adhesive being 25 to 60% by weight characterized in that(a) a polyvinyl alcohol concentration in the solution excluding solid other than polyvinyl alcohol from adhesive being in the region bounded by the following formulas:Y.gtoreq.-0.0014 X+9.4 (i)Y.ltoreq.-0.0061 X+26.3 (ii)200.ltoreq.X.ltoreq.3500 (iii)wherein Y is defined by the following formula: ##EQU1## and X is degree of polymerization of polyvinyl alcohol, (b) the viscosity of the adhesive measured by a Brookfield viscometer being from 200 to 6000 centipoises at 85.degree. C.Type: GrantFiled: November 29, 1988Date of Patent: March 6, 1990Assignees: Kuraray Co., Ltd., Rengo Co., Ltd.Inventors: Masateru Tokuno, Kinichi Shirakawa, Takatoshi Koyakumaru, Takuji Okaya, Hiroji Kohno, Hiroyuki Onishi
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Patent number: 4824696Abstract: A process for production of corrugated board using an aqueous adhesive which contains polyvinyl alcohol and clay, or polyvinyl alcohol, clay and water-soluble boron compound, the ratio of clay to polyvinyl alcohol being in the range of 200 to 600 parts by weight based on 100 parts by weight of polyvinyl alcohol, the ratio of water-soluble boron compound being not more than 15 parts by weight based on 100 parts by weight of polyvinyl alcohol, the solid content of the adhesive being 25 to 60% by weight characterized in that(a) a polyvinyl alcohol concentration in the solution excluding solid other than polyvinyl alcohol from adhesive being in the region bounded by the following formulas:Y.gtoreq.-0.0014 X+9.4 (i)Y.ltoreq.-0.0061 X+26.3 (II)200.ltoreq.X.ltoreq.Type: GrantFiled: October 30, 1985Date of Patent: April 25, 1989Assignees: Kuraray Co., Ldt., Rengo Co., Ltd.Inventors: Masateru Tokumo, Kinichi Shirakawa, Takatoshi Koyakumaru, Takuji Okaya, Hiroyuki Onishi, Hiroji Kohno
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Patent number: 4798110Abstract: A method for positioning tools comprises a first process for moving all tools into a stand-by reach and a second process for moving tools into a positioning reach, and the second process comprises steps of moving a tool onto an origin and moving the tool from the origin by a distance equal to a desired distance between the tool and a following tool. An apparatus for positioning tools is provided with a single signal generator rotated by a rotating shaft for moving shifters, by which the tools are moved in the positioning and stand-by reaches.Type: GrantFiled: November 4, 1981Date of Patent: January 17, 1989Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawata, Yasuharu Mori
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Patent number: 4795297Abstract: An apparatus for feeding boards, said apparatus being provided with reversing arm means 23 which comprises a table 21 and a conveyance surface 22, said conveyance surface making an obtuse angle with said table, and fork means 33 capable of pivoting edge resting boards on the conveyance surface from a backwardly inclined posture to a forwardly inclined posture.Type: GrantFiled: June 26, 1987Date of Patent: January 3, 1989Assignees: Rengo Co., Ltd., S.K. Engineering Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada, Sadaaki Gotou, Toshihiro Fukaya
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Patent number: 4737846Abstract: A device for detecting any defects in single faced corrugated fiberboard while it is running. A light is irradiated to the corrugated surface of the fiberboard and the striped image is scanned by an image pick-up unit and the picture signal is converted to binary-coded signal to discriminate the number of stripes or corrugations. The number is counted by a counter and compared with a normal number by a microcoputer. If there is too large a difference between them, the scanned part is judged as defective. This device can detect any defects in a running web at a sufficiently high speed to follow the line speed of a corrugating machine.Type: GrantFiled: May 28, 1987Date of Patent: April 12, 1988Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada, Yasuharu Mori, Ikuo Yoshimoto
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Patent number: 4696212Abstract: An improved rotary cutter for a web material is proposed. It has a pair of rolls adapted to rotate synchronously in opposite directions and an axially elongated knife secured to each roll to extend axially. A plurality of rolling bodies are arranged around each roll to bear the shock upon cutting. Different means for preventing the knives from hitting the rolling bodies are proposed. This arrangement prevents the rolls from warping due to shock upon cutting and allows the use of rolls having a smaller diameter.Type: GrantFiled: June 16, 1986Date of Patent: September 29, 1987Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada, Yasuharu Mori
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Patent number: 4684360Abstract: A device for positioning tools such as slitters and scorers used with a corrugating machine is proposed. As a pair of rotary shafts rotate, tool heads mounted thereon and each carrying a tool rotate, so that the tools work the web of corrugated fiberboard fed between them as required. When a transfer unit is operated with the tool head supporting plate coupled with the position adjusting member carrying a tool head, they move together axially along the rotary shafts, so that a pair of the tools will be moved simultaneously to a desired position.Type: GrantFiled: February 13, 1986Date of Patent: August 4, 1987Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada
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Patent number: 4682743Abstract: An apparatus for automatically mounting rolls of a web material on a mill roll stand first moves a web roll on a roller conveyor in an axial direction and then in a lateral direction toward roll supports. The web roll is then automatically aligned with the roll supports by moving it vertically or turning the roll supports.Type: GrantFiled: February 12, 1986Date of Patent: July 28, 1987Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada, Yoshihiro Ishii
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Patent number: 4658723Abstract: A color printing machine having a plurality of printing units includes a plate cylinder and an impression cylinder. A web length adjusting unit is arranged between each pair of adjacent printing units so as to adjust the length of web existing between the printing units to be equal to the printing length multiplied by an integer.Type: GrantFiled: February 18, 1986Date of Patent: April 21, 1987Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada, Yasuharu Mori
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Patent number: 4620896Abstract: A single facer comprising plural means for corrugating and pasting sheet medium and a pressure roll, characterized in that each pair of upper and lower corrugating rolls are capable of being moved so that the lower corrugating roll may be brought into contact with the pressure roll.Type: GrantFiled: December 9, 1985Date of Patent: November 4, 1986Assignee: Rengo Co., Ltd.Inventors: Hiroshi Sueki, Kuniaki Yufu
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Patent number: 4612006Abstract: An improved die cutting apparatus separates the gripper margin from the product portion and the releases the gripper margin from the gripper at the same station, i.e. at a pair of rolls. Further, the gripper margin is re-held and re-released at the pair of the rolls to prevent the gripper margins from becoming up with the product portions.Type: GrantFiled: September 18, 1984Date of Patent: September 16, 1986Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada
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Patent number: 4600841Abstract: Mark detector for detecting marks on a running web distinguished from any printed letter or pattern or any printing smudge. The width of mark segments and the distance between them are determined and, if they are within preset ranges, a mark detection signal is given. A delayed signal generator and a false signal generator are provided.Type: GrantFiled: July 19, 1983Date of Patent: July 15, 1986Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Yasuharu Mori
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Patent number: 4592278Abstract: An improved printing apparatus has printing units, a pair of feed rolls, a pair of pull rolls, a speed adjusting unit having a pair of rolls, and a control unit. The speed adjusting unit reciprocates linearly to advance and retreat the web in the printing units. While the web is being printed, the feed and pull rolls are stopped. While it is not being printed, they are driven to feed the web for a distance equal to one printing length. The speed adjusting unit is driven so as to move at a speed equal to half the peripheral speed of the plate cylinder while the web is being printed.Type: GrantFiled: December 10, 1984Date of Patent: June 3, 1986Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada, Yasuharu Mori
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Patent number: 4586673Abstract: An apparatus for automatically mounting rolls of a web material on a mill roll stand first moves a web roll on a roller conveyor then in an axial direction and next in a lateral direction toward roll then automatically supports. The web roll is aligned with the roll supports by moving it vertically or turning the roll supports.Type: GrantFiled: August 21, 1984Date of Patent: May 6, 1986Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada, Yoshihiro Ishii
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Patent number: 4586434Abstract: A device for replacing plate cylinders for a color rotary press is proposed which includes suspending units having a bearing adapted to support one end of the shaft of a plate cylinder and to be movable in a vertical direction, and travellers for moving the suspending units in a horizontal direction, and elevator conveyors having bearings secured to a chain to support one end of the shaft of the plate cylinder and move the latter up and down.Type: GrantFiled: May 1, 1985Date of Patent: May 6, 1986Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada, Hidetoshi Hoshiyama, Toshihiro Yoneda
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Patent number: 4580086Abstract: Tools to be positioned all at once are moved from a stand-by reach toward a positioning reach by means of a rotatable shaft, and respectively positioned at their desired positions in the positioning reach after passing an origin located at a border line between the stand-by and positioning reaches. Central computer controls count pulse signals transmitted from a pulse generator synchronously rotated by the rotatable shaft, and compensate set values for the desired positions for the distance over which each tool has been moved in the stand-by reach.Type: GrantFiled: March 14, 1984Date of Patent: April 1, 1986Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada, Yasuharu Mori
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Patent number: 4577746Abstract: A control system for a blank presser used to touch down blanks fed from a conveyor controls the blank presser so as to hold down each of the blanks at the proper time, so as to thereby prevent them from scattering or jamming up. The control system can control the blank presser automatically even if the speed or length of the blanks changes.Type: GrantFiled: March 18, 1985Date of Patent: March 25, 1986Assignee: Rengo Co., Ltd.Inventors: Masateru Tokuno, Tetsuya Sawada, Yasuharu Mori
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Patent number: 4569714Abstract: A single facer for manufacturing single-faced corrugated boards comprising a pair of side frames, each side frame having an interior opening which has been formed so that either or both of upper and lower corrugating rolls may be lowered and taken out through it.Type: GrantFiled: July 24, 1981Date of Patent: February 11, 1986Assignee: Rengo Co., Ltd.Inventor: Masateru Tokuno