Fluctuation Damping Means Patents (Class 226/60)
  • Patent number: 6104907
    Abstract: There is provided an image recording apparatus which does not cause a print shift or a color drift caused by vibration and a widthwise shift due to speed variation in a conveying direction of a continuous sheet such as rolled paper or folded paper, in which a variation in speed is prevented by rollers which wind and clamp the sheet on and between an upper and a lower roller which are driven by the conveying force of the sheet, so as to prevent occurrence of vibration in the conveying direction, and a guide roller having pins adapted to be engaged in sprocket holes of the sheet are provided between the set-up positions of the tractors.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: August 15, 2000
    Assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.
    Inventors: Shigeru Obata, Hidefumi Ohtsuka, Shuho Yokokawa, Isao Nakajima, Akitomo Kuwabara
  • Patent number: 4269342
    Abstract: An array of dancer rollers are resiliently biased for engaging a plurality of webs in a take-up zone of a honeycomb machine. The dancer rollers engage each web and thrust it out of its plane of advance to maintain the webs under continuous tension loading as they are alternately advanced and halted during successive feeding and cutting cycles, respectively. A pair of index rollers engage the webs, pull them from supply rolls and feed them to a cyclic cutter in response to rotation of the index rollers. In this arrangement, the continuous drive rollers used in conventional web movement arrangements are eliminated with the webs being pulled from the supply roll intermittently and according to need by the index rollers.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: May 26, 1981
    Inventor: Daniel H. Ellinor
  • Patent number: 4147315
    Abstract: Shock-resistant tape transport apparatus of the type which has supply and take-up reels that are driven by surface engagement of a capstan with the outermost layer of tape on each reel. Each reel is journaled in a separate pivot arm carriage that is urged pivotally toward the capstan, to maintain the surface engagement as the tape is driven from one reel to the other. Resistance to shock and vibration is achieved by providing each carriage with a counterweight to balance the mass of the corresponding tape reel, and with a pivotal mounting that automatically moves the pivot point of the carriage to compensate for changes in the mass of the reel as the tape is moved from one reel to the other.
    Type: Grant
    Filed: November 17, 1977
    Date of Patent: April 3, 1979
    Assignee: BASF Aktiengesellschaft
    Inventor: Roger S. Kincel
  • Patent number: 3966108
    Abstract: An inertia isolator is mounted on the frame of a web transport system between a drive roller and a supply reel on which web material is wound. A first relatively stiff member is mounted to the frame adjacent the drive roller and a second relatively stiff member is flexibly attached to the first member and positioned so that the web material is in slidable contact. The second member flexes in a direction to aid in unwinding the web when the drive roller is accelerated and flexes in the other direction when the drive roller is decelerated.
    Type: Grant
    Filed: March 11, 1974
    Date of Patent: June 29, 1976
    Assignee: Texas Instruments Incorporated
    Inventor: Alfred Kent Boyd
  • Patent number: 3951324
    Abstract: A vibration regulator for an advancing web is disclosed. An idler roller is provided in nonsliding contact with the web, and an adjustable, spring biased drag member contacts the roller to control the advancing force on the web necessary to rotate the roller.
    Type: Grant
    Filed: March 15, 1974
    Date of Patent: April 20, 1976
    Assignee: Xerox Corporation
    Inventor: Arnold L. Pundsack