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7596882 |
Treater oven for manufacturing prepreg
A treater oven for drying a prepreg includes: a pipe conduit configured such that the prepreg is able to pass therethrough; a the first structure connected to one side of the pipe conduit and...
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7187148 |
Controller
Disclosed is a controller for restraining vibration of a driven element driven by a servomotor. The driven element driven by the servomotor is provided with acceleration detecting means. A...
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7145300 |
Multi-axis AC servo control system and method
A multiple axis servo control implements a multi-tasking PWM control unit to provide PWM signals for multiple axes in a single unit. A time slice mechanism provides axis selection signals based on...
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7026780 |
Method for stabilizing the movement of an articulated chain of a chain block, especially to prevent the formation of a resonance oscillation of the chain, and a chain block apparatus
The invention concerns a method for stabilizing the motion of an articulated chain of a chain block, especially to prevent the formation of resonance oscillation of the chain, in which an...
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6856850 |
Controlling web tension, and accumulating lengths of web, using a festoon
This invention pertains to processing continuous webs such as paper, film, composites, and the like, in dynamic continuous processing operations. More particularly, it relates to accumulating...
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6819065 |
Dynamic braking of a tape motor
An apparatus and method for the controlled dynamic braking of a DC motor in a tape transport device are provided. A PWM state device includes a plurality of state transition paths, each path having...
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6680589 |
Relay contact monitoring device
A device for monitoring the state of relay contacts is especially useful for controlling motor windings in air conditioning systems. When a first relay switch, which is operative to supply power to...
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6583590 |
String drawing device for a racquet
A string drawing electrical device for a racquet has a casing, a string holder, an actuating device and a control unit. The string holder is rotatably attached to a panel of the casing. The...
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6314333 |
Method and apparatus for controlling web tension by actively controlling velocity and acceleration of a dancer roll
This invention pertains to processing continuous webs such as paper, film, composites, and the like, in dynamic continuous processing operations. More particularly, it relates to controlling...
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6300732 |
Dual power unit for movement of a back and footrest in armchairs and the like
The dual power unit includes an elongate housing having mounted therein adjacent opposite ends thereof two power units, one of which is drivingly connected to the movable back of an armchair, and...
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6208096 |
Optimized winding drive
In a tape transport for recording and/or reproducing signals by means of a recording medium using separate winding motors for driving the winding plates, the drive of the winding motors servo units...
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6191542 |
Method and apparatus for cleaning a DC motor commutator-brush interface
Commutators on a direct current motor run at low speed for an extended period of time get covered with a coating that makes the interface between the commutator and the brushes unreliable...
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6065883 |
Franking apparatus and printing means thereof
A method and apparatus is disclosed for controlling energization of a take-up motor driving a take-up spool of used ink ribbon in thermal printing apparatus. Prior to a printing cycle, the take-up...
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5866877 |
Oven for heating elongate cord
An oven for continuously heating a cord, which oven has a housing defining an internal space for treatment of a cord. The housing has an inlet and an outlet communicating with the internal housing...
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5767633 |
Electric motor drive system
An electrodynamic motor drive system, for generating enhanced rotational output, is comprised of a pair of flywheel mechanisms that are integrally connected to an output shaft. Each flywheel...
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5729100 |
Method and apparatus for controlling backlash in motor drive systems
An anti-backlash gearing system which includes first and second drive gears hich mesh with a driven gear to provide torque and rotational motion to the driven gear. The drive gears are each driven...
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5712539 |
Digital acoustic noise reduction in electric motors driven by switching power amplifiers
A system and method is provided for controlling a brushless DC motor (100), the motor being of the type having a plurality of coils (25, 26, 27) and a switching amplifier coil driving circuit (25A,...
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5691610 |
Process for reducing the friction between a rotating head drum and recording medium in tape form during winding operation
A process for reducing the friction between a rotating head drum and a tape-shaped recording medium which surrounds the head drum for recording and/or playing back information. In order to shorten...
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5485066 |
Variable speed centrifugal drive control for sugar refining machines and the like
A drive control system for a centrifugal used in, for example, a sugar refining operation, optimizes the deceleration and plow-out phases of its operation based on the torque characteristics of its...
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5410224 |
Tape position-dependent, standstill tape tension control system
A magnetic tape transport having a pair of reel motors for bidirectionally driving a tape between a pair of reels within a cassette housing, and a pair of tension control transistors for...
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5357178 |
Web tensioning control system
A motor control system for controlling a plurality of drive motors in a web tensioning system includes individual motor control circuits for each motor in the system. The web tensioning system...
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5350981 |
Method and apparatus for winding a cord continuously in dip treating apparatus
This invention discloses a method and an apparatus for winding a cord continuously. A rotation of a winding bobbin around which a cord to be a tension member of a belt, is detected directly or...
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5341073 |
Device for controlling reel driving motor
A device for running a tape-like medium between a pair of reels in accordance with one of a plurality of tape-running modes having different tape running speeds has the following constituents, a...
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5320266 |
Strip storage arrangement with independent tension control of synchronously operated support carriages
A strip storage arrangement with a strip storage unit in strip treatment plants. The strip storage unit is divided into two or more storage sections. Each strip storage section has its own tension...
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5289087 |
Surface winder drive and method
A batcher has a brake (E) connected to the packing roll (B) for slowing the packing roll as during an unwinding phase to vary the packing ratio between the packing roll (B) and the drive roll (A)....
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5282586 |
Apparatus for controlling tape tension in a magnetic tape device by controlling a reverse torque motor
A tension control apparatus for a tape player comprising a motor for driving a reel table on which a tape reel is installed, a tension detector which is pressed by a biasing force of a spring to...
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5277378 |
Numerically controlled tape takeup system having device for automatic calibration of conversion formula
A tape takeup system includes a tensiometer which outputs a numerical value which changes in proportion to the tension applied to the tape. The numerical value is converted into a value of tension...
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5256944 |
Motor speed control method and apparatus with drooping compensation independent of acceleration or deceleration current and time constant of motor
A speed control method and apparatus for a motor driven by output of a power conversion unit, wherein a first current command value is inputted to derive a drooping variable, a deviation between a...
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5248112 |
Tape transport control system with a feedforward capstan drive to the reel motors
A feedforward circuit applies a capstan drive current, or its equivalent, to the reel tension servo circuits whose associated reels are transporting the tape. The additional drive current to the...
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5222684 |
Tape driving apparatus for tape medium record reproducing apparatus
A tape driving apparatus includes both supply and takeup reel diameter detectors so as to compute the inertia of both the reels, wherein the acceleration/deceleration torque information spent in...
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5161209 |
Servo control device for a VTR
A drum servo circuit (310) is controlled by one (301) of a pair of microprocessors, and a reel servo circuit (220) and a capstan servo circuit (240) are controlled by the other microprocessor...
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5125592 |
Tape transport system with servo gain responsive to detected tape tension
A tape transport apparatus is comprised of a friction type capstan servo block having a friction type capstan driven by a capstan motor controlled by a capastan servo circuit in response to a...
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5086964 |
Dual drive web feed apparatus and method
A web drive cyclically moves a web a fixed distance. First and second spaced draw roll units include separate servo motors. Separate programmed controllers are connected to energize the servo...
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5085379 |
Method of controlling reel drive
A method of controlling reel drive so that a magnetic tape is transported from one reel of first and second reels to the other between them at predetermined transport velocity including the steps...
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5045763 |
Motor-control device for image forming apparatus
Motor-control device for an image forming apparatus includes a motor, an encoder, a microcomputer, and a driving circuit. The encoder generates a pulse signal in response to rotation of the motor....
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5039027 |
Method for control of tape tension between the reels and apparatus therefor
This invention relates to tape tension control in a device which has a capstan disposed between a supply reel and which transport a tape wound around the supply reel to the take-up reel. While the...
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5032936 |
Tape tension apparatus
A tape traveling apparatus drives differentially a tracking control actuator and a tension control actuator by inputting simultaneously into a tension controller a tracking instruction signal...
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5022599 |
Controller for a winding machine
A controller for a winding machine, for controlling the tension of a work running from a feed roller to a winding beam. The controller comprises a speed ratio control unit having a high response...
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5022604 |
Reel servo device for video cassette recorder in direct drive reel system
A reel servo device for a video cassette recorder with a direct drive reel system, which carries out smoothly fast forward and fast rewind operations by distributing properly the load carried to...
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5012989 |
Apparatus and method for tape velocity and tension control in a capstanless magnetic tape transport
In a capstanless tape transport, practice of the invention provides substantially constant tape tension when tape is spooled from a supply reel to a take up reel over the tape's entire length, for...
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4996466 |
Circuit for controlling a tape tension during search mode
A tape-tension control circuit for preventing an over-voltage from being applied by a phase locked loop (PPL) to drive a reel motor for use in a video recording/reproducing apparatus upon selection...
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4993660 |
Reel drive device
A device for running a tape-shaped medium convoluted across two reels, including a rotation drive for rotating a reel, a detector for detecting the rotating state of said reel, data-for-control...
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4979691 |
Contact printer
A magnetic tape contact printing apparatus includes a rotational transfer drum for driving a copy tape in intimate contact with a mother tape on which information signals are recorded, these...
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RE33399 |
Tension control for web handling apparatus
A batcher and the like is illustrated for utilizing torque control rather than speed control to vary the packing ratio of the rolls of a surface wound cloth roll. A phase shifting differential...
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4963810 |
Variable load motor drive control
The invention relates to a method and apparatus for making low inertia motors useful under circumstances where the load exerting drag on the motor during start-up acceleration may be different from...
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4958111 |
Tension and web guiding system
A system including a self-contained electromechanical control mechanism and method of operation is provided for controlling the tension and lateral position of a web or tape as it is motor driven...
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4945293 |
Web tension control system
To control the draw exerted on a web which is being fed to the rolls of a web processing machine, a strain wave gear power transmission device has its power input shaft driven by the main drive...
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4919049 |
Web feed printing press
A web feed printing press, more especially a rotogravure press, has a longitudinal shaft for driving printing units and a device for driving the web draw rolls. In order to achieve a simpler design...
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4889293 |
Apparatus and method for controlling tension in a movable web
Apparatus for controlling tension in a movable web includes a frame supporting a web supply roll, and a torque motor connected to the supply roll. The web is supported along a web path. Web...
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4814673 |
Reel to reel tape radius measurement apparatus and method therefor
In a reel to reel tape transport system for determining the radii of the reel to reel tape by generating a series of forward and reverse pulses from a brushless DC motor driving the reel to reel...
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