Patents by Inventor Sunao Ikeda

Sunao Ikeda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6289195
    Abstract: A developer replenishing device for replenishing a developing device with a developer, and a developer container for use therewith. The developer container, or toner bottle, has a mouth portion at one end thereof which is smaller in diameter than a hollow cylindrical main body. At the end of the bottle provided with the mouth portion, a shoulder has the inner periphery thereof partly raised to the edge of the mouth portion to form a raised portion for scooping up a toner. In addition, a part of the inner periphery of the circumferental wall of the bottle, which is contiguous with the raised portion, is also raised toward the axis of the bottle, about which the bottle is rotatable, thereby forming another raised portion. When the bottle is mounted on a bottle holder, which is included in the replienishing device, substantially horizontally with the mouth portion oriented sideways, the bottle is rotated to raise the toner from the bottom of the main body to the mouth portion.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: September 11, 2001
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Takeshi Saito, Sunao Ikeda, Nobuhiro Makita, Seiji Ozawa, Shigeru Yoshiki, Takaaki Yanagisawa
  • Patent number: 6075963
    Abstract: A developer replenishing device for replenishing a developing device with a developer, and a developer container for use therewith. The developer container, or toner bottle, has a mouth portion at one end thereof which is smaller in diameter than a hollow cylindrical main body. At the end of the bottle provided with the mouth, a shoulder has the inner periphery thereof partly raised to the edge of the mouth portion to form a raised portion for scooping up a toner. In addition, a part of the inner periphery of the circumferential wall of the bottle which is contiguous with the raised portion is also raised toward the axis of the bottle about which the bottle is rotatable, thereby forming another raised portion. When the bottle is mounted to a bottle holder, which is included in the replenishing device, substantially horizontally with the mouth portion oriented sideways, the bottle is rotated to raise the toner from the bottom of the main body to the mouth portion.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: June 13, 2000
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Takeshi Saito, Sunao Ikeda, Nobuhiro Makita, Seiji Ozawa, Shigeru Yoshiki, Takaaki Yanagisawa
  • Patent number: 5918090
    Abstract: A developer replenishing device for replenishing a developing device with a developer, and a developer container for use therewith. The developer container, or toner bottle, has a mouth portion at one end thereof which is smaller in diameter than a hollow cylindrical main body. At the end of the bottle provided with the mouth, a shoulder has the inner periphery thereof partly raised to the edge of the mouth portion to form a raised portion for scooping up a toner. In addition, a part of the inner periphery of the circumferential wall of the bottle which is contiguous with the raised portion is also raised toward the axis of the bottle about which the bottle is rotatable, thereby forming another raised portion. When the bottle is mounted to a bottle holder, which is included in the replenishing device, substantially horizontally with the mouth portion oriented sideways, the bottle is rotated to raise the toner from the bottom of the main body to the mouth portion.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: June 29, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Takeshi Saito, Sunao Ikeda, Nobuhiro Makita, Seiji Ozawa, Shigeru Yoshiki, Takaaki Yanagisawa
  • Patent number: 5822663
    Abstract: A developer replenishing device for replenishing a developing device with a developer, and a developer container for use therewith. The developer container, or toner bottle, has a mouth portion at one end thereof which is smaller in diameter than a hollow cylindrical main body. At the end of the bottle provided with the mouth, a shoulder has the inner periphery thereof partly raised to the edge of the mouth portion to form a raised portion for scooping up a toner. In addition, a part of the inner periphery of the circumferential wall of the bottle which is contiguous with the raised portion is also raised toward the axis of the bottle about which the bottle is rotatable, thereby forming another raised portion. When the bottle is mounted to a bottle holder, which is included in the replenishing device, substantially horizontally with the mouth portion oriented sideways, the bottle is rotated to raise the toner from the bottom of the main body to the mouth portion.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: October 13, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Takeshi Saito, Sunao Ikeda, Nobuhiro Makita, Seiji Ozawa, Shigeru Yoshiki, Takaaki Yanagisawa
  • Patent number: 5740507
    Abstract: A toner container densely packed with toner to be replenished into a developing unit included in an image forming apparatus, and a method of producing the same. The toner is packed in the container with a ratio of a packing density to a saturation bulk density greater than 1.0, a mean penetration greater than 5.0 mm inclusive, and a standard deviation of penetration not exceeding one-fifth of the mean penetration. The toner can be smoothly and continuously replenished into the developing unit so as to form a number of images matching the amount thereof.
    Type: Grant
    Filed: April 4, 1996
    Date of Patent: April 14, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Sunao Ikeda, Nobuhiro Makita, Michiharu Narushima, Seiji Terazawa, Masakazu Nakada, Kazuhiko Umemura
  • Patent number: 5727607
    Abstract: A powder feeding method includes the steps of injecting a gaseous medium into a powder material held in a hopper from a porous wall forming a funnel at a bottom part of said hopper, such that the injection of the gaseous medium is carried out intermittently.
    Type: Grant
    Filed: January 25, 1996
    Date of Patent: March 17, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Sunao Ikeda, Michiharu Narushima, Nobuhiro Makita
  • Patent number: 5711353
    Abstract: A powder filling method and a powder filling device for filling a powder such as toner, chemical, cosmetics or food material in a powder container efficiently at a high density includes the steps of inserting an air aspirating pipe in a powder filled in a powder container, aspirating air in the powder through the air aspirating pipe, and moving one end of the air aspirating pipe from a bottom portion to a top portion of the powder container, corresponding to an amount of the powder filled.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: January 27, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Sunao Ikeda, Michiharu Narushima, Nobuhiro Makita
  • Patent number: 5655195
    Abstract: In a developing device included in an image forming apparatus, a toner cartridge has a body and a replenishing member disposed in the body. The cartridge makes it needless to adhere or otherwise affix an elastic piece to the edge of the base of the replenishing member that slidably contacts the inner periphery of the body. The replenishing member is capable of scooping up toner while being held in sliding contact with the inner periphery of the body under a constant pressure.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: August 5, 1997
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Seiji Terazawa, Sunao Ikeda
  • Patent number: 5627631
    Abstract: A developer replenishing device for replenishing a developing device with a developer, and a developer container for use therewith. The developer container, or toner bottle, has a mouth portion at one end thereof which is smaller in diameter than a hollow cylindrical main body. At the end of the bottle provided with the mouth, a shoulder has the inner periphery thereof partly raised to the edge of the mouth portion to form a raised portion for scooping up a toner. In addition, a part of the inner periphery of the circumferential wall of the bottle which is contiguous with the raised portion is also raised toward the axis of the bottle about which the bottle is rotatable, thereby forming another raised portion. When the bottle is mounted to a bottle holder, which is included in the replenishing device, substantially horizontally with the mouth portion oriented sideways, the bottle is rotated to raise the toner from the bottom of the main body to the mouth portion.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: May 6, 1997
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Takeshi Saito, Sunao Ikeda, Nobuhiro Makita, Seiji Ozawa, Shigeru Yoshiki, Takaaki Yanagisawa
  • Patent number: 5500719
    Abstract: A developer replenishing device for replenishing a developing device with a developer, and a developer container for use therewith. The developer container, or toner bottle, has a mouth portion at one end thereof which is smaller in diameter than a hollow cylindrical main body. At the end of the bottle provided with the mouth, a shoulder has the inner periphery thereof partly raised to the edge of the mouth portion to form a raised portion for scooping up a toner. In addition, a part of the inner periphery of the circumferential wall of the bottle which is contiguous with the raised portion is also raised toward the axis of the bottle about which the bottle is rotatable, thereby forming another raised portion. When the bottle is mounted to a bottle holder, which is included in the replenishing device, substantially horizontally with the mouth portion oriented sideways, the bottle is rotated to raise the toner from the bottom of the main body to the mouth portion.
    Type: Grant
    Filed: February 10, 1995
    Date of Patent: March 19, 1996
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Takeshi Saito, Sunao Ikeda, Nobuhiro Makita, Seiji Ozawa, Shigeru Yoshiki, Takaaki Yanagisawa
  • Patent number: 5455662
    Abstract: A developer replenishing device for replenishing a developing device with a developer, and a developer container for use therewith. The developer container, or toner bottle, has a mouth portion at one end thereof which is smaller in diameter than a hollow cylindrical main body. At the end of the bottle provided with the mouth, a shoulder has the inner periphery thereof partly raised to the edge of the mouth portion to form a raised portion for scooping up a toner. In addition, a part of the inner periphery of the circumferential wall of the bottle which is contiguous with the raised portion is also raised toward the axis of the bottle about which the bottle is rotatable, thereby forming another raised portion. When the bottle is mounted to a bottle holder, which is included in the replenishing device, substantially horizontally with the mouth portion oriented sideways, the bottle is rotated to raise the toner from the bottom of the main body to the mouth portion.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: October 3, 1995
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Ichikawa, Takeshi Saito, Sunao Ikeda, Nobuhiro Makita, Seiji Ozawa, Shigeru Yoshiki, Takaaki Yanagisawa
  • Patent number: 4921236
    Abstract: A recycling automatic document feeder usable with an electronic copier and others includes a reversing section for feeding a document to a glass platen of the copier while turning it over. The document feeder adapts itself to a single-face and a double-face copy mode as well as to a document through type and an optical scan type exposing system.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: May 1, 1990
    Assignee: Ricoh Company, Ltd.
    Inventors: Sirou Saeki, Sunao Ikeda, Hirohisa Otsuka, Nobuyuki Yanagawa
  • Patent number: 4912501
    Abstract: An automatic original circulating and feeding apparatus apparatus comprises an original feeding base for receiving a plurality of originals thereon, which are piled up with image faces thereof turned downwardly, an original separating and feeding device for successively separating the piled up originals on the original feeding base one by one from a lowermost original and feeding them one by one in an order separated, a reversible and speed-changeable belt conveyor device disposed in an exposure part for exposing each of the originals fed, and a sensor disposed at a position separated by at least the largest original length from the original separating and feeding mechanism, for selectively setting a scanning copy mode or a sheet through copy mode and for controlling a position of the original for a copy mode selected.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: March 27, 1990
    Assignee: Ricoh Company, Ltd.
    Inventors: Shiro Saeki, Sunao Ikeda
  • Patent number: 4903085
    Abstract: An automatic original circulating and feeding apparatus comprises an original feeding base for receiving a plurality of originals thereon, which are piled-up with image-faces thereof downwardly, an original separating and feeding device for separating and feeding piled-up originals one by one, a belt conveyor device disposed in an exposure portion for exposing each of the originals, a turning over and conveyor device disposed at downstream of the belt conveyor device in the carrying direction, a discharging and carrying device disposed to connect the turning over and conveyor device with the original feeding base, and a switchback turning over and conveyor device disposed along an original passage provided in the discharging and carrying device.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: February 20, 1990
    Assignee: Ricoh Company, Ltd.
    Inventors: Sunao Ikeda, Shiro Saeki
  • Patent number: 4860057
    Abstract: An automatic original circulating and feeding apparatus apparatus comprises an original feeding base for receiving a plurality of originals thereon, which are piled up with image faces thereof turned downwardly, an original separating and feeding device for successively separating the piled up originals on the original feeding basee one by one from a lowermost original and feeding them one by one in an order separated, a reversible and speed-changeable belt conveyor device disposed in an exposure part for exposing each of the orignals fed, and a sensor disposed at a position separated by at least the largest original length from the original separating and feeding mechanism, for selectively setting a scanning copy mode or a sheet through copy mode and for controlling a position of the original for a copy mode selected.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: August 22, 1989
    Assignee: Ricoh Company, Ltd.
    Inventors: Shiro Saeki, Sunao Ikeda
  • Patent number: 4482147
    Abstract: A sheet arranging system for use with a sorter, collator, etc., providing a sheet arranging section defined by receiving rollers, delivery rollers and a forward reference edge, wherein sheets fed on the basis of rearward reference are moved toward a forward reference. The sheet arranging section has sheet obliquely moving means located therein for obliquely moving toward the delivery rollers and the forward reference edge the sheet released from the receiving rollers in accordance with the rearward reference irrespective of the size of the sheet, while so rotating the sheet that a corner of the leading edge of the sheet near to the operator is moved away from the forward reference edge.
    Type: Grant
    Filed: August 5, 1982
    Date of Patent: November 13, 1984
    Assignee: Ricoh Co., Ltd.
    Inventors: Kunio Hibi, Tamaki Kaneko, Sunao Ikeda, Tugio Okuzawa, Yohtaro Kakitani, Hideo Kikuchi
  • Patent number: 4449813
    Abstract: A deflector (C) is movable relative to bin (E) to selectively deflect sheets into the bins (E) for collation. An enable signal for a next collation operation is generated when a sensor (94) senses that the required number of sheets for collation have been discharged into the bins (E). The sensor (94) in combination with a sensor (45) which senses sheets entering the collator (2) detect a sheet jam and enable computation of the number of jammed sheets by subtracting the number of sheets discharged into the bins (E) from the number of sheets entering the collator (2).
    Type: Grant
    Filed: January 3, 1983
    Date of Patent: May 22, 1984
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Kikuchi, Sunao Ikeda, Yohtaro Kakitani, Kunio Hibi, Tugio Okuzawa
  • Patent number: 4439865
    Abstract: A sorter for a copy machine is equipped with a portion adapted to receive sheets inserted manually for use as covers or partitions of the copies in the sorter. The sorter may be formed of one or more sorter portions arranged serially and is provided with a memory register for memorizing information corresponding to the number of sheets to be inserted manually, a count register for counting the number of sheets for manual insertion, and a circuit for inhibiting the manual insert operation for a predetermined period of time after the contents in the memory register becomes equal to the contents in the count register, thereby attaining the precise and reliable collation and sorting of the sheets to be inserted as covers and partitions.
    Type: Grant
    Filed: January 7, 1981
    Date of Patent: March 27, 1984
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Kikuchi, Tamaki Kaneko, Kunio Hibi, Sunao Ikeda, Yohtaro Kakitani
  • Patent number: 4365887
    Abstract: A sheet distribution method is provided which, when a stop switch (20) to stop a copying operation of a copying machine (1) or an interrupt switch (21) to interrupt the copying operation is depressed during the copying operation in a collation mode or an assortment mode, inhibits any further copying operation while keeping only a copy sheet conveyor section operative to deliver already fed copy sheets to a collator 82). When the number of copy sheets stored in the collator (2) has coincided with the number of fresh sheets fed out of the copying machine (1) during that copying operation, the conveyor section is made inoperative and the next copy start and variation in the operating mode of the machine (1) or preset number of sheet to be copied are permitted.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: December 28, 1982
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohtaro Kakitani, Tamaki Kaneko, Sunao Ikeda, Tugio Okuzawa, Hideo Kikuchi, Kunio Hibi
  • Patent number: 4361319
    Abstract: A bin for receiving sheets arranged in an apparatus for collating or sorting of sheets fed successively, which includes a rear end portion, a front end portion and an intermediate inclination portion connected therebetween. The front end portion includes a stopper or stoppers extending substantially vertical for stopping a front end of the sheet fed into the bin and a straight guide portion, on which the stopper or stoppers attached. The rear end portion includes an upright plate extending substantially vertical used for stopping and aligning a rear end of the sheet and a plate inclined so as to go down forwards in sheet feeding direction. The intermediate inclination portion is connected at front and rear end with the straight guide plate and the inclined plate of the rear end portion direct or through curve portion. In this bin the sheet can be aligned by using falling motion of the sheet with the own weight.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: November 30, 1982
    Assignee: Ricoh Co., Ltd.
    Inventors: Sunao Ikeda, Tamaki Kaneko, Kunio Hibi, Tugio Okuzawa, Yohtaro Kakitani, Hideo Kikuchi